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\n\n \n \n 2024\n \n \n (2)\n \n \n
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\n \n \n\n \n \n \n \n \n \n Pre- and Postpartum Acoustic Activity in Captive Pacific White-Sided Dolphin (Lagenorhynchus obliquidens) Mothers.\n \n \n \n \n\n\n \n Mishima, Y.; Matsumoto, T.; Morisaka, T.; and Nakahara, F.\n\n\n \n\n\n\n Mammal Study, 49(1). 1 2024.\n \n\n\n\n
\n\n\n\n \n \n![\"Pre-](\"//bibbase.org/img/filetypes/link.svg\"\n\t "\\"Website\\"\n\t")
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\n\n\n\n@article{\n title = {Pre- and Postpartum Acoustic Activity in Captive Pacific White-Sided Dolphin (Lagenorhynchus obliquidens) Mothers},\n type = {article},\n year = {2024},\n volume = {49},\n websites = {https://bioone.org/journals/mammal-study/volume-49/issue-1/ms2023-0020/Pre--and-Postpartum-Acoustic-Activity-in-Captive-Pacific-White/10.3106/ms2023-0020.full},\n month = {1},\n day = {31},\n id = {b04d0c80-02b7-3225-b421-04ed25d57de2},\n created = {2024-03-24T03:21:25.252Z},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2024-03-24T03:29:50.515Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n bibtype = {article},\n author = {Mishima, Yuka and Matsumoto, Teruyo and Morisaka, Tadamichi and Nakahara, Fumio},\n doi = {10.3106/ms2023-0020},\n journal = {Mammal Study},\n number = {1}\n}\n\n \n\n \n \n \n \n \n \n Non-invasive age estimation based on faecal DNA using methylation-sensitive high-resolution melting for Indo-Pacific bottlenose dolphins.\n \n \n \n \n\n\n \n Yagi, G.; Qi, H.; Arai, K.; Kita, Y., F.; Kogi, K.; Morisaka, T.; Yoshioka, M.; and Inoue-Murayama, M.\n\n\n \n\n\n\n Molecular Ecology Resources, 24(2): e13906. 2 2024.\n \n\n\n\n
\n\n\n\n \n \nWebsite\n \n \n\n \n \n doi\n \n \n\n \n link\n \n \n\n bibtex\n \n\n \n \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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\n\n\n@article{\n title = {Non-invasive age estimation based on faecal DNA using methylation-sensitive high-resolution melting for Indo-Pacific bottlenose dolphins},\n type = {article},\n year = {2024},\n keywords = {DNA methylation,Mikura Island,ageing,demography,ecology,epigenetics},\n pages = {e13906},\n volume = {24},\n websites = {https://onlinelibrary.wiley.com/doi/10.1111/1755-0998.13906},\n month = {2},\n day = {2},\n id = {aaccfaa5-cfb1-3045-ab19-3e237eef9351},\n created = {2024-03-24T03:25:08.412Z},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2024-03-24T03:33:19.280Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n abstract = {Age is necessary information for the study of life history of wild animals. A general method to estimate the age of odontocetes is counting dental growth layer groups (GLGs). However, this method is highly invasive as it requires the capture and handling of individuals to collect their teeth. Recently, the development of DNA-based age estimation methods has been actively studied as an alternative to such invasive methods, of which many have relied on used biopsy samples. However, if DNA-based age estimation can be developed from faecal samples, age estimation can be performed entirely non-invasively. We developed an age estimation model using the methylation rate of two gene regions, GRIA2 and CDKN2A, measured through methylation-sensitive high-resolution melting (MS-HRM) from faecal samples of wild Indo-Pacific bottlenose dolphins (Tursiops aduncus). The age of individuals was known through conducting longitudinal individual identification surveys underwater. Methylation rates were quantified from 36 samples collected from 30 individuals. Both gene regions showed a significant correlation between age and methylation rate. The age estimation model was constructed based on the methylation rates of both genes which achieved sufficient accuracy (after LOOCV: MAE = 5.08, R2 = 0.33) for the ecological studies of the Indo-Pacific bottlenose dolphins, with a lifespan of 40–50 years. This is the first study to report the use of non-invasive faecal samples to estimate the age of marine mammals.},\n bibtype = {article},\n author = {Yagi, Genfu and Qi, Huiyuan and Arai, Kana and Kita, Yuki F. and Kogi, Kazunobu and Morisaka, Tadamichi and Yoshioka, Motoi and Inoue-Murayama, Miho},\n doi = {10.1111/1755-0998.13906},\n journal = {Molecular Ecology Resources},\n number = {2}\n}\n\n Age is necessary information for the study of life history of wild animals. A general method to estimate the age of odontocetes is counting dental growth layer groups (GLGs). However, this method is highly invasive as it requires the capture and handling of individuals to collect their teeth. Recently, the development of DNA-based age estimation methods has been actively studied as an alternative to such invasive methods, of which many have relied on used biopsy samples. However, if DNA-based age estimation can be developed from faecal samples, age estimation can be performed entirely non-invasively. We developed an age estimation model using the methylation rate of two gene regions, GRIA2 and CDKN2A, measured through methylation-sensitive high-resolution melting (MS-HRM) from faecal samples of wild Indo-Pacific bottlenose dolphins (Tursiops aduncus). The age of individuals was known through conducting longitudinal individual identification surveys underwater. Methylation rates were quantified from 36 samples collected from 30 individuals. Both gene regions showed a significant correlation between age and methylation rate. The age estimation model was constructed based on the methylation rates of both genes which achieved sufficient accuracy (after LOOCV: MAE = 5.08, R2 = 0.33) for the ecological studies of the Indo-Pacific bottlenose dolphins, with a lifespan of 40–50 years. This is the first study to report the use of non-invasive faecal samples to estimate the age of marine mammals.\n
\n\n\n\n
\n\n \n \n 2023\n \n \n (3)\n \n \n
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\n \n \n\n \n \n \n \n \n \n Group definition for underwater observation of wild Indo-Pacific bottlenose dolphins.\n \n \n \n \n\n\n \n Morisaka, T.; Furuichi, T.; Kogi, K.; and Yoshioka, M.\n\n\n \n\n\n\n Journal of Ethology, 41(2): 141-151. 5 2023.\n \n\n\n\n
\n\n\n\n \n \nWebsite\n \n \n\n \n \n doi\n \n \n\n \n link\n \n \n\n bibtex\n \n\n \n \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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\n\n\n@article{\n title = {Group definition for underwater observation of wild Indo-Pacific bottlenose dolphins},\n type = {article},\n year = {2023},\n keywords = {Group definition,Indo-Pacific bottlenose dolphin,Social network analysis,Tursiops aduncus,Underwater observation},\n pages = {141-151},\n volume = {41},\n websites = {https://link.springer.com/article/10.1007/s10164-023-00780-7},\n month = {5},\n publisher = {Springer},\n day = {1},\n id = {82417caa-0dfd-3658-bbfe-9f22dc49a126},\n created = {2023-07-01T08:05:44.857Z},\n accessed = {2023-07-01},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2023-07-01T08:07:50.233Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n abstract = {The group definition for an animal population is important for building associations among individuals (i.e., social network). Indo-Pacific bottlenose dolphins (Tursiops aduncus) have a society with high fission–fusion dynamics that changes their group memberships over time, making it difficult to define groups clearly. In addition, current group definitions of small delphinid species are mainly related to boat-based or land-based surveys, and few definitions exist for underwater surveys. We propose a group definition for underwater observations after comparing 234 group transitions from 44 surveys of simultaneous boat-based and underwater observations targeting the resident Indo-Pacific bottlenose dolphins around Mikura Island, Japan. Our results highly matched group transitions between boat-based and underwater observations when all video-recorded dolphins during one encounter (from entering to exiting the water) were defined as a group, and groups with at least one shared individual during one survey were treated as the same group. This definition successfully produced highly similar association indices to boat observation. This is useful for underwater surveys of highly maneuverable delphinids, especially for commercial-tour-based studies in which researchers do not have the full decision-making authority for the observations.},\n bibtype = {article},\n author = {Morisaka, Tadamichi and Furuichi, Tomo and Kogi, Kazunobu and Yoshioka, Motoi},\n doi = {10.1007/S10164-023-00780-7/TABLES/5},\n journal = {Journal of Ethology},\n number = {2}\n}\n\n The group definition for an animal population is important for building associations among individuals (i.e., social network). Indo-Pacific bottlenose dolphins (Tursiops aduncus) have a society with high fission–fusion dynamics that changes their group memberships over time, making it difficult to define groups clearly. In addition, current group definitions of small delphinid species are mainly related to boat-based or land-based surveys, and few definitions exist for underwater surveys. We propose a group definition for underwater observations after comparing 234 group transitions from 44 surveys of simultaneous boat-based and underwater observations targeting the resident Indo-Pacific bottlenose dolphins around Mikura Island, Japan. Our results highly matched group transitions between boat-based and underwater observations when all video-recorded dolphins during one encounter (from entering to exiting the water) were defined as a group, and groups with at least one shared individual during one survey were treated as the same group. This definition successfully produced highly similar association indices to boat observation. This is useful for underwater surveys of highly maneuverable delphinids, especially for commercial-tour-based studies in which researchers do not have the full decision-making authority for the observations.\n
\n\n\n\n \n\n \n \n \n \n \n \n Yawning in Wild Indo-Pacific Bottlenose Dolphins (Tursiops aduncus).\n \n \n \n \n\n\n \n Enokizu, A.; Morisaka, T.; Kogi, K.; and Yoshioka, M.\n\n\n \n\n\n\n Mammal Study, 48(3). 4 2023.\n \n\n\n\n
\n\n\n\n \n \nWebsite\n \n \n\n \n \n doi\n \n \n\n \n link\n \n \n\n bibtex\n \n\n \n \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n \n \n \n \n \n \n \n \n \n\n\n\n
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Website\n \n \n\n \n \n doi\n \n \n\n \n link\n \n \n\n bibtex\n \n\n \n \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n \n \n \n \n \n \n \n \n \n\n\n\n\n
\n\n\n@article{\n title = {Yawning in Wild Indo-Pacific Bottlenose Dolphins (Tursiops aduncus)},\n type = {article},\n year = {2023},\n keywords = {Resting,involuntary action,open-mouth behavior},\n volume = {48},\n websites = {https://bioone.org/journals/mammal-study/volume-48/issue-3/ms2022-0060/Yawning-in-Wild-Indo-Pacific-Bottlenose-Dolphins-Tursiops-aduncus/10.3106/ms2022-0060.full,https://bioone.org/journals/mammal-study/volume-48/issue-3/ms2022-0060/Yawning-in-Wild-Indo-P},\n month = {4},\n publisher = {Mammal Society of Japan},\n day = {24},\n id = {d7e92a4d-c4c5-3f9f-ab5d-20fe1d5fa7e0},\n created = {2023-07-01T08:06:18.616Z},\n accessed = {2023-07-01},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2023-07-01T08:19:27.215Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n abstract = {Yawning is defined as an involuntary behavior with breathing, characterized by a slow opening of the mouth with inhalation, followed by a maximum gaping phase, and ending with a short exhalation and closing of the mouth. Recent reports on yawning in marine mammals (common bottlenose dolphins and a dugong) have challenged this definition because these marine mammals yawn underwater without breathing. However, yawning in marine mammals has only been studied in captive conditions, which indicates the possibility that yawning is an abnormal behavior in captive animals. Here, we report yawning in free-ranging wild Indo-Pacific bottlenose dolphins off Mikura Island, Japan. Five yawnings that occurred between 8:00 am and 10:30 am were identified from 1816 hours of video data. The dolphins in this population may exhibit more resting behaviors in the morning, which implies that yawning in this population occurred in resting states that required arousal. This is the first reported observation of yawning in Indo-Pacific bottlenose dolphins. The occurrence of yawning in a wild population suggests that it is an innate behavior, rather than abnormal behavior, in dolphins.},\n bibtype = {article},\n author = {Enokizu, Akiko and Morisaka, Tadamichi and Kogi, Kazunobu and Yoshioka, Motoi},\n doi = {10.3106/ms2022-0060},\n journal = {Mammal Study},\n number = {3}\n}\n\n Yawning is defined as an involuntary behavior with breathing, characterized by a slow opening of the mouth with inhalation, followed by a maximum gaping phase, and ending with a short exhalation and closing of the mouth. Recent reports on yawning in marine mammals (common bottlenose dolphins and a dugong) have challenged this definition because these marine mammals yawn underwater without breathing. However, yawning in marine mammals has only been studied in captive conditions, which indicates the possibility that yawning is an abnormal behavior in captive animals. Here, we report yawning in free-ranging wild Indo-Pacific bottlenose dolphins off Mikura Island, Japan. Five yawnings that occurred between 8:00 am and 10:30 am were identified from 1816 hours of video data. The dolphins in this population may exhibit more resting behaviors in the morning, which implies that yawning in this population occurred in resting states that required arousal. This is the first reported observation of yawning in Indo-Pacific bottlenose dolphins. The occurrence of yawning in a wild population suggests that it is an innate behavior, rather than abnormal behavior, in dolphins.\n
\n\n\n\n \n\n \n \n \n \n \n \n Directional and amplitude characteristics of pulsed call sequences in captive free-swimming Pacific white-sided dolphins (Lagenorhynchus obliquidens).\n \n \n \n \n\n\n \n Mishima, Y.; Matsuo, I.; Karasawa, Y.; Ishii, M.; and Morisaka, T.\n\n\n \n\n\n\n The Journal of the Acoustical Society of America, 154(5): 2974-2987. 11 2023.\n \n\n\n\n
\n\n\n\n \n \nWebsite\n \n \n\n \n \n doi\n \n \n\n \n link\n \n \n\n bibtex\n \n\n \n \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n \n \n \n\n\n\n
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\n\n\n@article{\n title = {Directional and amplitude characteristics of pulsed call sequences in captive free-swimming Pacific white-sided dolphins (Lagenorhynchus obliquidens)},\n type = {article},\n year = {2023},\n pages = {2974-2987},\n volume = {154},\n websites = {/asa/jasa/article/154/5/2974/2920877/Directional-and-amplitude-characteristics-of},\n month = {11},\n publisher = {AIP Publishing},\n day = {1},\n id = {403d099a-a464-3a0d-88d9-95920ad27078},\n created = {2023-11-13T06:23:27.173Z},\n accessed = {2023-11-13},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2024-03-24T03:08:56.287Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n abstract = {<p>We investigated the directional properties and gain control of a pulsed call sequence that functions as a contact call in Pacific white-sided dolphins (Lagenorhynchus obliquidens). The pulsed call sequences were stereotyped patterns composed of three or more pulsed call elements and were collected from two dolphins, separated into adjacent pools, and allowed to swim freely. Eight hydrophones and an overhead camera were used to determine the positions and directions of the participants. The mean peak frequency and source levels were 8.4 ± 4.4 (standard deviation)–18.7 ± 12.7 kHz and 160.8 ± 3.8 to 176.4 ± 7.9 dB re 1 μPa (peak-to-peak), respectively, depending on the element types. The elements were omnidirectional, with mean directivity index of 0.9 ± 3.4 dB. The dolphins produced sequences, regardless of their relative position and direction to the lattice, leading to the adjacent pool where the conspecific was housed. They increased the amplitude by 6.5 ± 4.6 dB as the distance from the caller to an arbitrary point in the adjacent pool doubled. These results suggest that callers broadcast pulsed call sequences in a wide direction to reach dispersed conspecifics. However, they can adjust the acoustic active space by controlling the source levels.</p>},\n bibtype = {article},\n author = {Mishima, Yuka and Matsuo, Ikuo and Karasawa, Yuu and Ishii, Marina and Morisaka, Tadamichi},\n doi = {10.1121/10.0022377},\n journal = {The Journal of the Acoustical Society of America},\n number = {5}\n}\n\n
\n\n\nWe investigated the directional properties and gain control of a pulsed call sequence that functions as a contact call in Pacific white-sided dolphins (Lagenorhynchus obliquidens). The pulsed call sequences were stereotyped patterns composed of three or more pulsed call elements and were collected from two dolphins, separated into adjacent pools, and allowed to swim freely. Eight hydrophones and an overhead camera were used to determine the positions and directions of the participants. The mean peak frequency and source levels were 8.4 ± 4.4 (standard deviation)–18.7 ± 12.7 kHz and 160.8 ± 3.8 to 176.4 ± 7.9 dB re 1 μPa (peak-to-peak), respectively, depending on the element types. The elements were omnidirectional, with mean directivity index of 0.9 ± 3.4 dB. The dolphins produced sequences, regardless of their relative position and direction to the lattice, leading to the adjacent pool where the conspecific was housed. They increased the amplitude by 6.5 ± 4.6 dB as the distance from the caller to an arbitrary point in the adjacent pool doubled. These results suggest that callers broadcast pulsed call sequences in a wide direction to reach dispersed conspecifics. However, they can adjust the acoustic active space by controlling the source levels.
\n\n
\n\n \n \n 2022\n \n \n (4)\n \n \n
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\n \n \n\n \n \n \n \n \n \n Observation of yawn-like behavior in a dugong (Dugong dugon).\n \n \n \n \n\n\n \n Enokizu, A.; Morisaka, T.; Handa, Y.; and Yoshioka, M.\n\n\n \n\n\n\n Journal of Ethology, 40(1): 103-108. 1 2022.\n \n\n\n\n
\n\n\n\n \n \nWebsite\n \n \n\n \n \n doi\n \n \n\n \n link\n \n \n\n bibtex\n \n\n \n \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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Website\n \n \n\n \n \n doi\n \n \n\n \n link\n \n \n\n bibtex\n \n\n \n \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n\n
\n\n\n@article{\n title = {Observation of yawn-like behavior in a dugong (Dugong dugon)},\n type = {article},\n year = {2022},\n keywords = {Animal Ecology,Behavioral Sciences,Evolutionary Biology,Slow swimming,Yawn-like behavior,Zoology},\n pages = {103-108},\n volume = {40},\n websites = {https://rdcu.be/cCjM5,https://link.springer.com/10.1007/s10164-021-00732-z},\n month = {1},\n publisher = {Springer},\n day = {27},\n id = {2645ce3f-6caf-32d8-988e-2126d25b4b7f},\n created = {2021-11-30T07:03:26.193Z},\n accessed = {2021-11-30},\n file_attached = {false},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2022-09-29T06:29:46.747Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n abstract = {Yawning is an involuntary action that occurs in three phases: (1) slow mouth opening accompanied by inhalation, (2) maintaining the maximum mouth size, and (3) quick closure with exhalation. Yawning is a phylogenetically widespread behavior in vertebrates. Here, we report yawn-like behavior in a captive dugong. Fourteen yawn-like behaviors were identified in a 20.1 h observation period. These yawn-like behaviors occurred significantly more during resting states than during more active states. These yawn-like behaviors of the dugong may function as yawns, typically associated with drowsiness. These findings imply that yawning may be a universal behavior, even in fully aquatic mammals.},\n bibtype = {article},\n author = {Enokizu, Akiko and Morisaka, Tadamichi and Handa, Yukari and Yoshioka, Motoi},\n doi = {10.1007/s10164-021-00732-z},\n journal = {Journal of Ethology},\n number = {1}\n}\n\n Yawning is an involuntary action that occurs in three phases: (1) slow mouth opening accompanied by inhalation, (2) maintaining the maximum mouth size, and (3) quick closure with exhalation. Yawning is a phylogenetically widespread behavior in vertebrates. Here, we report yawn-like behavior in a captive dugong. Fourteen yawn-like behaviors were identified in a 20.1 h observation period. These yawn-like behaviors occurred significantly more during resting states than during more active states. These yawn-like behaviors of the dugong may function as yawns, typically associated with drowsiness. These findings imply that yawning may be a universal behavior, even in fully aquatic mammals.\n
\n\n\n\n \n\n \n \n \n \n \n \n Calf-Directed Aggression as a Possible Infanticide Attempt in Pacific White-Sided Dolphins (Lagenorhynchus obliquidens).\n \n \n \n \n\n\n \n Rosser, L., R.; Morisaka, T.; Mitani, Y.; and Igarashi, T.\n\n\n \n\n\n\n Aquatic Mammals, 48(3): 273-286. 5 2022.\n \n\n\n\n
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\n\n\n@article{\n title = {Calf-Directed Aggression as a Possible Infanticide Attempt in Pacific White-Sided Dolphins (Lagenorhynchus obliquidens)},\n type = {article},\n year = {2022},\n pages = {273-286},\n volume = {48},\n websites = {https://www.aquaticmammalsjournal.org/index.php?option=com_content&view=article&id=2196:calf-directed-aggression-as-a-possible-infanticide-attempt-in-pacific-white-sided-dolphins-lagenorhynchus-obliquidens&catid=207&Itemid=326},\n month = {5},\n day = {15},\n id = {11942476-478a-3edc-be60-b9098208b29c},\n created = {2022-05-13T05:11:18.175Z},\n accessed = {2022-05-13},\n file_attached = {false},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2022-05-13T05:15:25.945Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n abstract = {We report the first case of conspecific calf-directed aggression in Pacific white-sided dolphins (Lagenorhynchus obliquidens) as a possible infanticide attempt in Mutsu Bay, Japan. Our observation of a 75-minute-long persistent attack on a neonate was performed by 10 attackers (4 adult males, 1 possible male, and 5 of unknown sex) and left the neonate with visible injuries. Only one individual was recorded for the entirety of the event and was regarded as the possible mother, displaying protective behaviours towards the neonate as well as being the target of coercive guarding and sexual behaviours, such as mounting, by the attackers. The observation featured a distinct group composition change in which, after 50 minutes, the attack was taken over by a new group of attackers. There was a brief overlap between the groups in which some dolphins from the first group surfaced with the second. Excluding the mother and calf, only two individuals that were observed towards the end of the first group attack remained with the second group until the end of the observation. The first group of attackers did not make further aggressive attempts on the neonate or presumed mother, and no conflict between the two groups was witnessed. The second group continued the attack with significantly increased aggression and a greater array of behavioural types than the first, often dividing into two approximately 5- to 10-m distanced subgroups—one that herded the suspected mother and another that focused on attacking the neonate. Our study analysed the frequency and variety of behavioural types used in the attack and compared them between individuals and the two separate attack groups. The group change we observed is absent from the literature on conspecific calf-directed attacks in other cetacean species and, if this is an infanticide attempt, provides new insight into the social structure of Pacific white-sided dolphins.},\n bibtype = {article},\n author = {Rosser, Leanne R. and Morisaka, Tadamichi and Mitani, Yoko and Igarashi, Takeshi},\n doi = {10.1578/AM.48.3.2022.273},\n journal = {Aquatic Mammals},\n number = {3}\n}\n\n We report the first case of conspecific calf-directed aggression in Pacific white-sided dolphins (Lagenorhynchus obliquidens) as a possible infanticide attempt in Mutsu Bay, Japan. Our observation of a 75-minute-long persistent attack on a neonate was performed by 10 attackers (4 adult males, 1 possible male, and 5 of unknown sex) and left the neonate with visible injuries. Only one individual was recorded for the entirety of the event and was regarded as the possible mother, displaying protective behaviours towards the neonate as well as being the target of coercive guarding and sexual behaviours, such as mounting, by the attackers. The observation featured a distinct group composition change in which, after 50 minutes, the attack was taken over by a new group of attackers. There was a brief overlap between the groups in which some dolphins from the first group surfaced with the second. Excluding the mother and calf, only two individuals that were observed towards the end of the first group attack remained with the second group until the end of the observation. The first group of attackers did not make further aggressive attempts on the neonate or presumed mother, and no conflict between the two groups was witnessed. The second group continued the attack with significantly increased aggression and a greater array of behavioural types than the first, often dividing into two approximately 5- to 10-m distanced subgroups—one that herded the suspected mother and another that focused on attacking the neonate. Our study analysed the frequency and variety of behavioural types used in the attack and compared them between individuals and the two separate attack groups. The group change we observed is absent from the literature on conspecific calf-directed attacks in other cetacean species and, if this is an infanticide attempt, provides new insight into the social structure of Pacific white-sided dolphins.\n
\n\n\n\n \n\n \n \n \n \n \n \n Communication sounds produced by captive narrow-ridged finless porpoises (Neophocaena asiaeorientalis).\n \n \n \n \n\n\n \n Terada, T.; Morisaka, T.; Wakabayashi, I.; and Yoshioka, M.\n\n\n \n\n\n\n Journal of Ethology, 40(3): 245-256. 9 2022.\n \n\n\n\n
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\n\n\n@article{\n title = {Communication sounds produced by captive narrow-ridged finless porpoises (Neophocaena asiaeorientalis)},\n type = {article},\n year = {2022},\n keywords = {Burst pulses,Contact call,Narrow-ridged finless porpoise,Neophocaena asiaeorientalis,Sound communication},\n pages = {245-256},\n volume = {40},\n websites = {https://link.springer.com/article/10.1007/s10164-022-00755-0},\n month = {9},\n publisher = {Springer},\n day = {1},\n id = {c099cca6-06f3-3002-9049-0014237b9966},\n created = {2022-09-29T06:23:33.066Z},\n accessed = {2022-09-29},\n file_attached = {false},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2022-09-29T06:29:48.332Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n abstract = {Toothed whales are the ideal model to validate the hypothesis that the complexity of sound communication relates to sociality. Compared to the numerous studies on several toothed whale species with complex social systems, there are very few studies on sound communication in species with simple social systems, such as narrow-ridged finless porpoises (Neophocaena asiaeorientalis). The sounds and behaviors of six captive narrow-ridged finless porpoises (two males and four females) were recorded at the Toba Aquarium, Japan, to reveal the existence of sound communication in this species. We compared the frequency and probability of the production of various sound types in three recording groups and between behaviors. We identified two novel sound types that were separate from echolocation clicks. The “packet sound” was a pulse sequence with repeated pulse packets (sound series of a few pulses with irregular, short inter-pulse intervals) and was produced by the one-porpoise group. The “burst pulses” was a pulse train in which the inter-pulse intervals were significantly shorter than those in packet sounds and were produced during contact behaviors. We considered that these two sound types were the communication sounds in narrow-ridged finless porpoises.},\n bibtype = {article},\n author = {Terada, Tomoyoshi and Morisaka, Tadamichi and Wakabayashi, Ikuo and Yoshioka, Motoi},\n doi = {10.1007/S10164-022-00755-0/FIGURES/7},\n journal = {Journal of Ethology},\n number = {3}\n}\n\n Toothed whales are the ideal model to validate the hypothesis that the complexity of sound communication relates to sociality. Compared to the numerous studies on several toothed whale species with complex social systems, there are very few studies on sound communication in species with simple social systems, such as narrow-ridged finless porpoises (Neophocaena asiaeorientalis). The sounds and behaviors of six captive narrow-ridged finless porpoises (two males and four females) were recorded at the Toba Aquarium, Japan, to reveal the existence of sound communication in this species. We compared the frequency and probability of the production of various sound types in three recording groups and between behaviors. We identified two novel sound types that were separate from echolocation clicks. The “packet sound” was a pulse sequence with repeated pulse packets (sound series of a few pulses with irregular, short inter-pulse intervals) and was produced by the one-porpoise group. The “burst pulses” was a pulse train in which the inter-pulse intervals were significantly shorter than those in packet sounds and were produced during contact behaviors. We considered that these two sound types were the communication sounds in narrow-ridged finless porpoises.\n
\n\n\n\n \n\n \n \n \n \n \n \n Body length and growth pattern of free-ranging Indo-Pacific bottlenose dolphins off Mikura Island estimated using an underwater 3D camera.\n \n \n \n \n\n\n \n Morisaka, T.; Sakai, M.; Hama, H.; and Kogi, K.\n\n\n \n\n\n\n Mammalian Biology, 102(4): 1513-1523. 8 2022.\n \n\n\n\n
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\n\n\n@article{\n title = {Body length and growth pattern of free-ranging Indo-Pacific bottlenose dolphins off Mikura Island estimated using an underwater 3D camera},\n type = {article},\n year = {2022},\n keywords = {Animal Anatomy / Morphology / Histology,Animal Ecology,Animal Systematics/Taxonomy/Biogeography,Evolutionary Biology,Fish & Wildlife Biology & Management,Zoology},\n pages = {1513-1523},\n volume = {102},\n websites = {https://link.springer.com/article/10.1007/s42991-022-00304-9,https://link.springer.com/10.1007/s42991-022-00304-9},\n month = {8},\n publisher = {Springer},\n day = {22},\n id = {2dde0c62-ee4b-30fc-8922-87bf235baaab},\n created = {2022-09-29T06:24:47.055Z},\n accessed = {2022-09-29},\n file_attached = {false},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2023-07-01T08:19:26.555Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n abstract = {Indo-Pacific bottlenose dolphins (Tursiops aduncus) around Mikura Island are important both commercially (swim-with-dolphin programs) and scientifically (long-term underwater behavioral studies). However, this population experienced a substantial population decline (31% of identified dolphins) between 2008 and 2011, which prompted us to monitor population health using body length. A decrease in the growth rate of neonates and calves is a warning sign of unhealthy conditions in the population. This study examined the total length of free-ranging Indo-Pacific bottlenose dolphins off Mikura Island, using a low-cost commercially available 3D underwater camera system. Length-at-age data from 129 measurements of 108 identified dolphins were successfully obtained and were best described by the Richards growth model compared to the Gompertz and von Bertalanffy models. Body length did not differ significantly between females and males, with an estimated population asymptotic length of 246.9 cm (95% confidence interval: 241.7–252.7 cm). Calves were approximately 100 cm in length at birth and reached 178.2 cm at 1 year of age and 208.6 cm at 3 years when many calves became independent from their mothers. Length-at-age estimates of the Mikura Island population are similar to and greater than those reported in southwestern Australia and Shark Bay, respectively. Our simple non-invasive underwater technique demonstrated to be effective in quantifying the growth pattern in a free-ranging dolphin population without using dead or stranded specimens, which provides essential information for monitoring of dolphin populations and sustainable swim-with-dolphin programs.},\n bibtype = {article},\n author = {Morisaka, Tadamichi and Sakai, Mai and Hama, Hiromitsu and Kogi, Kazunobu},\n doi = {10.1007/s42991-022-00304-9},\n journal = {Mammalian Biology},\n number = {4}\n}\n\n Indo-Pacific bottlenose dolphins (Tursiops aduncus) around Mikura Island are important both commercially (swim-with-dolphin programs) and scientifically (long-term underwater behavioral studies). However, this population experienced a substantial population decline (31% of identified dolphins) between 2008 and 2011, which prompted us to monitor population health using body length. A decrease in the growth rate of neonates and calves is a warning sign of unhealthy conditions in the population. This study examined the total length of free-ranging Indo-Pacific bottlenose dolphins off Mikura Island, using a low-cost commercially available 3D underwater camera system. Length-at-age data from 129 measurements of 108 identified dolphins were successfully obtained and were best described by the Richards growth model compared to the Gompertz and von Bertalanffy models. Body length did not differ significantly between females and males, with an estimated population asymptotic length of 246.9 cm (95% confidence interval: 241.7–252.7 cm). Calves were approximately 100 cm in length at birth and reached 178.2 cm at 1 year of age and 208.6 cm at 3 years when many calves became independent from their mothers. Length-at-age estimates of the Mikura Island population are similar to and greater than those reported in southwestern Australia and Shark Bay, respectively. Our simple non-invasive underwater technique demonstrated to be effective in quantifying the growth pattern in a free-ranging dolphin population without using dead or stranded specimens, which provides essential information for monitoring of dolphin populations and sustainable swim-with-dolphin programs.\n
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\n \n \n\n \n \n \n \n \n \n Yawn-like behavior in captive common bottlenose dolphins (Tursiops truncatus).\n \n \n \n \n\n\n \n Enokizu, A.; Morisaka, T.; Murakami, K.; Sakurai, N.; Ueda, N.; and Yoshioka, M.\n\n\n \n\n\n\n Behavioural Processes, 189: 104444. 8 2021.\n \n\n\n\n
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\n\n\n@article{\n title = {Yawn-like behavior in captive common bottlenose dolphins (Tursiops truncatus)},\n type = {article},\n year = {2021},\n pages = {104444},\n volume = {189},\n websites = {https://doi.org/10.1016/j.beproc.2021.104444,https://linkinghub.elsevier.com/retrieve/pii/S0376635721001285},\n month = {8},\n id = {a2b9ec3f-a651-376b-ad3c-1b968057842f},\n created = {2021-07-19T00:55:01.224Z},\n file_attached = {false},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2022-09-29T06:29:48.300Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n abstract = {Yawning is an involuntary action that begins with a slow opening of the mouth with inhalation, followed by a maximum gaping phase, and ends with a short exhalation and the closing of the mouth. A wide variety of vertebrate species, including humans, yawn. Here, we report underwater yawn-like behavior in three captive common bottlenose dolphins, inferred from 119-h of observations. Five cases of yawn-like behavior were selected out of 2045 open-mouth behaviors, after removing intentional open-mouth behaviors. Yawn-like behaviors were chosen that had a mouth open-close duration ratio of ≤ 1 (duration of Phase 3, the period of mouth closing after maximum opening, divided by the duration of Phase 1, the period of mouth opening from start to maximum opening). Naïve human evaluators selected "yawn-like" behaviors. All five cases of yawn-like behavior occurred during inactive periods, similar to human yawns. In three of the five cases, inactivity levels significantly decreased within 4 min after the yawn-like behavior; therefore, yawn-like behavior in dolphins may increase their arousal level in drowsy states. Thus, the yawn-like behavior of dolphins, without breathing, is similar to yawning in terrestrial animals, including humans.},\n bibtype = {article},\n author = {Enokizu, Akiko and Morisaka, Tadamichi and Murakami, Katsushi and Sakurai, Natsuko and Ueda, Nahoko and Yoshioka, Motoi},\n doi = {10.1016/j.beproc.2021.104444},\n journal = {Behavioural Processes}\n}\n\n Yawning is an involuntary action that begins with a slow opening of the mouth with inhalation, followed by a maximum gaping phase, and ends with a short exhalation and the closing of the mouth. A wide variety of vertebrate species, including humans, yawn. Here, we report underwater yawn-like behavior in three captive common bottlenose dolphins, inferred from 119-h of observations. Five cases of yawn-like behavior were selected out of 2045 open-mouth behaviors, after removing intentional open-mouth behaviors. Yawn-like behaviors were chosen that had a mouth open-close duration ratio of ≤ 1 (duration of Phase 3, the period of mouth closing after maximum opening, divided by the duration of Phase 1, the period of mouth opening from start to maximum opening). Naïve human evaluators selected \"yawn-like\" behaviors. All five cases of yawn-like behavior occurred during inactive periods, similar to human yawns. In three of the five cases, inactivity levels significantly decreased within 4 min after the yawn-like behavior; therefore, yawn-like behavior in dolphins may increase their arousal level in drowsy states. Thus, the yawn-like behavior of dolphins, without breathing, is similar to yawning in terrestrial animals, including humans.\n
\n\n\n\n \n\n \n \n \n \n \n 定住海域以外に出現したミナミハンドウイルカ様個体の種判別および種間交雑の可能性.\n \n \n \n\n\n \n 北夕紀; 佐々木萌美; 立川利幸; 十万仁志; 寺沢文男; 小木万布; 酒井麻衣; 村山美穂; 森阪匡通; 神田育子; and 吉岡基\n\n\n \n\n\n\n DNA多型, 29(1): 5-11. 2021.\n \n\n\n\n
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\n\n\n\n@article{\n title = {定住海域以外に出現したミナミハンドウイルカ様個体の種判別および種間交雑の可能性},\n type = {article},\n year = {2021},\n pages = {5-11},\n volume = {29},\n id = {4b2050b3-2bcc-34a5-b6cb-3ccf8fd4b7fa},\n created = {2021-09-14T02:34:02.958Z},\n file_attached = {false},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2021-09-14T02:34:02.958Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n bibtype = {article},\n author = {北夕紀, undefined and 佐々木萌美, undefined and 立川利幸, undefined and 十万仁志, undefined and 寺沢文男, undefined and 小木万布, undefined and 酒井麻衣, undefined and 村山美穂, undefined and 森阪匡通, undefined and 神田育子, undefined and 吉岡基, undefined},\n journal = {DNA多型},\n number = {1}\n}\n\n \n\n \n \n \n \n \n 飼育下のスナメリで観察された，長期的で頑強な個体間関係.\n \n \n \n\n\n \n 千藤咲; 森阪匡通; 若林郁夫; 村上勝志; and 吉岡基\n\n\n \n\n\n\n 哺乳類科学, 61(2): 169-177. 2021.\n \n\n\n\n
\n\n\n\n \n\n \n \n doi\n \n \n\n \n link\n \n \n\n bibtex\n \n\n \n\n \n \n \n 8 downloads\n \n \n\n \n \n \n \n \n \n \n\n \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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\n\n\n\n@article{\n title = {飼育下のスナメリで観察された，長期的で頑強な個体間関係},\n type = {article},\n year = {2021},\n keywords = {affiliative relationship,narrow,ridged finless porpoise,social disturbance,social relationship},\n pages = {169-177},\n volume = {61},\n publisher = {日本哺乳類学会},\n id = {839f1c43-ab64-3ed3-8103-87caf76295bc},\n created = {2021-09-14T02:44:23.658Z},\n accessed = {2021-09-14},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2021-09-14T02:47:27.362Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n bibtype = {article},\n author = {千藤咲, undefined and 森阪匡通, undefined and 若林郁夫, undefined and 村上勝志, undefined and 吉岡基, undefined},\n doi = {10.11238/MAMMALIANSCIENCE.61.169},\n journal = {哺乳類科学},\n number = {2}\n}\n\n \n\n \n \n \n \n \n Noncontact method for estimating ellipticity around the girth of a free-ranging dolphin.\n \n \n \n\n\n \n Hama, H.; and Morisaka, T.\n\n\n \n\n\n\n ICIC Express Letters. Part B, Applications : an international journal of research and surveys, 15: 755-762. 2021.\n \n\n\n\n
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\n\n\n\n@article{\n title = {Noncontact method for estimating ellipticity around the girth of a free-ranging dolphin},\n type = {article},\n year = {2021},\n pages = {755-762},\n volume = {15},\n id = {123294c5-72b4-397a-8644-69e3cf6387a1},\n created = {2021-09-14T02:44:59.006Z},\n file_attached = {false},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2021-09-14T02:44:59.006Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n bibtype = {article},\n author = {Hama, Hiromitsu and Morisaka, Tadamichi},\n doi = {10.24507/icicel.15.07.755},\n journal = {ICIC Express Letters. Part B, Applications : an international journal of research and surveys}\n}\n\n \n\n \n \n \n \n \n \n Contribution of flippers and dorsal fins to the lateral/directional inherent stability during straight-line swimming in small cetaceans.\n \n \n \n \n\n\n \n Okamura, T.; Akune, Y.; Mori, T.; Morisaka, T.; Otomo, W.; Wakabayashi, I.; Watanabe, S.; and Yoda, K.\n\n\n \n\n\n\n Journal of Zoology, 315(3): 165-174. 11 2021.\n \n\n\n\n
\n\n\n\n \n \nWebsite\n \n \n\n \n \n doi\n \n \n\n \n link\n \n \n\n bibtex\n \n\n \n \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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Website\n \n \n\n \n \n doi\n \n \n\n \n link\n \n \n\n bibtex\n \n\n \n \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n\n
\n\n\n@article{\n title = {Contribution of flippers and dorsal fins to the lateral/directional inherent stability during straight-line swimming in small cetaceans},\n type = {article},\n year = {2021},\n keywords = {cetacean,dihedral angle,dorsal fin,flipper,inherent stability},\n pages = {165-174},\n volume = {315},\n websites = {https://onlinelibrary.wiley.com/doi/full/10.1111/jzo.12915,https://onlinelibrary.wiley.com/doi/abs/10.1111/jzo.12915,https://zslpublications.onlinelibrary.wiley.com/doi/10.1111/jzo.12915},\n month = {11},\n publisher = {John Wiley & Sons, Ltd},\n day = {1},\n id = {b4db8bb8-60f0-3c81-98c5-8dfa12855384},\n created = {2021-11-30T07:07:20.908Z},\n accessed = {2021-11-30},\n file_attached = {false},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2021-11-30T07:08:58.968Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n abstract = {Fins are among the most important morphological appendages of aquatic animals. Although sall cetaceans have flippers and dorsal fins with a variety of morphologies and postures, the diversity and function of the fins have not attracted much attention thus far. In this study, we recorded the behaviour of five captive species of small cetaceans, including two species lacking dorsal fins, and examined the contribution of the dihedral angles of their flippers and dorsal fins in the lateral/directional inherent stability during straight-line swimming. All the species were found to maintain their flippers at a specific negative dihedral angle during straight-line swimming, and a significant difference was observed between species with and without dorsal fins: species without dorsal fins were found to swim by maintaining the dihedral angle of their flippers closer to 0° compared to species with dorsal fins. The rolling moment generated by the dihedral angle of the fins in all the species was a relatively small roll-promoting moment that ensures manoeuvrability. In summary, small cetaceans are likely to have one of two characteristics, either left and right flippers with a near-zero-degree dihedral angle or a dorsal fin, to reduce the roll-promoting moment. Our results highlight important aspects of swimming stability in dolphins, providing essential insights into the movement mechanisms of aquatic fish and mammals.},\n bibtype = {article},\n author = {Okamura, T. and Akune, Y. and Mori, T. and Morisaka, T. and Otomo, W. and Wakabayashi, I. and Watanabe, S. and Yoda, K.},\n doi = {10.1111/JZO.12915},\n journal = {Journal of Zoology},\n number = {3}\n}\n\n Fins are among the most important morphological appendages of aquatic animals. Although sall cetaceans have flippers and dorsal fins with a variety of morphologies and postures, the diversity and function of the fins have not attracted much attention thus far. In this study, we recorded the behaviour of five captive species of small cetaceans, including two species lacking dorsal fins, and examined the contribution of the dihedral angles of their flippers and dorsal fins in the lateral/directional inherent stability during straight-line swimming. All the species were found to maintain their flippers at a specific negative dihedral angle during straight-line swimming, and a significant difference was observed between species with and without dorsal fins: species without dorsal fins were found to swim by maintaining the dihedral angle of their flippers closer to 0° compared to species with dorsal fins. The rolling moment generated by the dihedral angle of the fins in all the species was a relatively small roll-promoting moment that ensures manoeuvrability. In summary, small cetaceans are likely to have one of two characteristics, either left and right flippers with a near-zero-degree dihedral angle or a dorsal fin, to reduce the roll-promoting moment. Our results highlight important aspects of swimming stability in dolphins, providing essential insights into the movement mechanisms of aquatic fish and mammals.\n
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\n\n \n \n 2020\n \n \n (1)\n \n \n
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\n \n \n\n \n \n \n \n \n \n Prey species and foraging behaviour of Indo-Pacific bottlenose dolphins (Tursiops aduncus) around Mikura Island in Japan.\n \n \n \n \n\n\n \n Takahashi, R.; Sakai, M.; Kogi, K.; Morisaka, T.; Segawa, T.; and Ohizumi, H.\n\n\n \n\n\n\n Aquatic Mammals, 46(6): 531-541. 11 2020.\n \n\n\n\n
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\n\n\n\n@article{\n title = {Prey species and foraging behaviour of Indo-Pacific bottlenose dolphins (Tursiops aduncus) around Mikura Island in Japan},\n type = {article},\n year = {2020},\n pages = {531-541},\n volume = {46},\n websites = {https://www.aquaticmammalsjournal.org/index.php?option=com_content&view=article&id=2106:prey-species-and-foraging-behaviour-of-indo-pacific-bottlenose-dolphins-tursiops-aduncus-around-mikura-island-in-japan&catid=190&Itemid=326},\n month = {11},\n day = {15},\n id = {d6a95ff1-82bb-3bba-af9d-5507ebec0288},\n created = {2021-05-07T01:39:53.874Z},\n file_attached = {false},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2021-05-07T01:47:15.013Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n bibtype = {article},\n author = {Takahashi, Rikiya and Sakai, Mai and Kogi, Kazunobu and Morisaka, Tadamichi and Segawa, Takao and Ohizumi, Hiroshi},\n doi = {10.1578/AM.46.6.2020.531},\n journal = {Aquatic Mammals},\n number = {6}\n}\n\n
\n\n \n \n 2019\n \n \n (2)\n \n \n
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\n \n \n\n \n \n \n \n \n \n Pulsed call sequences as contact calls in Pacific white-sided dolphins ( Lagenorhynchus obliquidens ).\n \n \n \n \n\n\n \n Mishima, Y.; Morisaka, T.; Ishikawa, M.; Karasawa, Y.; and Yoshida, Y.\n\n\n \n\n\n\n The Journal of the Acoustical Society of America, 146(1): 409-424. 7 2019.\n \n\n\n\n
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\n\n\n\n@article{\n title = {Pulsed call sequences as contact calls in Pacific white-sided dolphins ( Lagenorhynchus obliquidens )},\n type = {article},\n year = {2019},\n pages = {409-424},\n volume = {146},\n websites = {https://doi.org/10.1121/1.5116692,http://asa.scitation.org/doi/10.1121/1.5116692},\n month = {7},\n publisher = {Acoustical Society of America},\n day = {1},\n id = {27ac0007-6c0c-3457-9717-9fdc16566727},\n created = {2019-07-30T00:24:58.167Z},\n file_attached = {false},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2019-07-30T00:24:58.167Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n source_type = {JOUR},\n notes = {doi: 10.1121/1.5116692},\n private_publication = {false},\n bibtype = {article},\n author = {Mishima, Yuka and Morisaka, Tadamichi and Ishikawa, Megumi and Karasawa, Yuu and Yoshida, Yayoi},\n doi = {10.1121/1.5116692},\n journal = {The Journal of the Acoustical Society of America},\n number = {1}\n}\n\n \n\n \n \n \n \n \n \n Interacting effects of vessel noise and shallow river depth elevate metabolic stress in Ganges river dolphins.\n \n \n \n \n\n\n \n Dey, M.; Krishnaswamy, J.; Morisaka, T.; and Kelkar, N.\n\n\n \n\n\n\n Scientific Reports, 9(1): 15426. 12 2019.\n \n\n\n\n
\n\n\n\n \n \nWebsite\n \n \n\n \n \n doi\n \n \n\n \n link\n \n \n\n bibtex\n \n\n \n \n \n abstract \n \n\n \n \n \n 6 downloads\n \n \n\n \n \n \n \n \n \n \n\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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\n\n\n@article{\n title = {Interacting effects of vessel noise and shallow river depth elevate metabolic stress in Ganges river dolphins},\n type = {article},\n year = {2019},\n keywords = {Behavioural ecology,Conservation biology,Ecological modelling,Ecology,Freshwater ecology,Hydrology},\n pages = {15426},\n volume = {9},\n websites = {http://www.nature.com/articles/s41598-019-51664-1},\n month = {12},\n publisher = {Nature Publishing Group},\n day = {28},\n id = {2ee783fc-3c8a-32dc-95f4-b5aacf0805ef},\n created = {2019-11-11T07:23:57.867Z},\n accessed = {2019-11-11},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2019-11-11T07:25:50.129Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n abstract = {In riverine ‘soundscapes’, complex interactions between sound, substrate type, and depth create difficulties in assessing impacts of anthropogenic noise pollution on freshwater fauna. Underwater noise from vessels can negatively affect endangered Ganges river dolphins (Platanista gangetica), which are ‘almost blind’ and rely entirely on high-frequency echolocation clicks to sense their environment. We conducted field-based acoustic recordings and modelling to assess acoustic responses of Platanista to underwater noise exposure from vessels in the Ganga River (India), which is now being transformed into a major waterway. Dolphins showed enhanced activity during acute noise exposure and suppressed activity during chronic exposure. Increase in ambient noise levels altered dolphin acoustic responses, strongly masked echolocation clicks, and more than doubled metabolic stress. Noise impacts were further aggravated during dry-season river depth reduction. Maintaining ecological flows, downscaling of vessel traffic, and propeller modifications to reduce cavitation noise, could help mitigate noise impacts on Ganges river dolphins.},\n bibtype = {article},\n author = {Dey, Mayukh and Krishnaswamy, Jagdish and Morisaka, Tadamichi and Kelkar, Nachiket},\n doi = {10.1038/s41598-019-51664-1},\n journal = {Scientific Reports},\n number = {1}\n}\n\n In riverine ‘soundscapes’, complex interactions between sound, substrate type, and depth create difficulties in assessing impacts of anthropogenic noise pollution on freshwater fauna. Underwater noise from vessels can negatively affect endangered Ganges river dolphins (Platanista gangetica), which are ‘almost blind’ and rely entirely on high-frequency echolocation clicks to sense their environment. We conducted field-based acoustic recordings and modelling to assess acoustic responses of Platanista to underwater noise exposure from vessels in the Ganga River (India), which is now being transformed into a major waterway. Dolphins showed enhanced activity during acute noise exposure and suppressed activity during chronic exposure. Increase in ambient noise levels altered dolphin acoustic responses, strongly masked echolocation clicks, and more than doubled metabolic stress. Noise impacts were further aggravated during dry-season river depth reduction. Maintaining ecological flows, downscaling of vessel traffic, and propeller modifications to reduce cavitation noise, could help mitigate noise impacts on Ganges river dolphins.\n
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\n\n \n \n 2018\n \n \n (2)\n \n \n
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\n \n \n\n \n \n \n \n \n \n Foraging and feeding ecology of Platanista : an integrative review.\n \n \n \n \n\n\n \n Kelkar, N.; Dey, S.; Deshpande, K.; Choudhary, S., K.; Dey, S.; and Morisaka, T.\n\n\n \n\n\n\n Mammal Review, 48(3): 194-208. 7 2018.\n \n\n\n\n
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\n\n\n@article{\n title = {Foraging and feeding ecology of Platanista : an integrative review},\n type = {article},\n year = {2018},\n keywords = {Acoustics,Electroreception,Foraging modes,Platanista river dolphins,River water column},\n pages = {194-208},\n volume = {48},\n websites = {https://onlinelibrary.wiley.com/doi/10.1111/mam.12124},\n month = {7},\n id = {83afbc85-dc2a-36a0-ae78-3187c4218184},\n created = {2018-04-27T23:44:10.950Z},\n file_attached = {false},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2023-07-01T08:19:26.895Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n abstract = {Limited visual perception in aquatic environments has driven the evolution of diverse sensory modalities in aquatic mammals. Dolphins largely use echolocation for prey capture in the face of limited visual and olfactory cues. Multiple foraging modes exist, although an understanding of how sensory systems are adapted to environmental and prey characteristics is limited. This is especially true for animals with extreme sensory specialisation, such as South Asian river dolphins of the genus Platanista. This taxon is effectively blind and retains plesiomorphic traits from its once-diverse ancestors. Distributed in murky rivers of the Indus-Ganga-Brahmaputra basins, it is thought to use mainly echolocation for feeding on fish and shrimp. We hypothesised that foraging modes used by Platanista differ according to prey position in the water column (at the river surface, mid-column, and bottom) and are mediated by ecomorphology, acoustics, prey characteristics, and habitat features. To test this, we combined a detailed review of the literature (anatomy-physiology-morphology studies, observations in captivity) with preliminary field observations and acoustics studies to investigate foraging mode selection. Platanista displays peculiar foraging and feeding behaviours, including side swimming, rotational feeding, and grasp-suction feeding. Feeding is restricted to small prey with low body depth. At the river surface and bottom, echolocation-based foraging may not be efficient due to acoustic reflection or reverberation effects. Platanista uses echolocation clicks to scan and detect prey at distances of about 20 m across the river mid-column, possibly switching to passive listening at the surface, and electroreception at the bottom, to maximise prey capture rate and feeding success. Platanista is remarkable for its ability to persist in some of the most intensively used and abused river basins of the world. Using echolocation, electroreception, and passive listening might reduce overall foraging costs and contribute to the adaptability of the taxon.},\n bibtype = {article},\n author = {Kelkar, Nachiket and Dey, Subhasis and Deshpande, Kadambari and Choudhary, Sunil Kumar and Dey, Sushant and Morisaka, Tadamichi},\n doi = {10.1111/mam.12124},\n journal = {Mammal Review},\n number = {3}\n}\n\n Limited visual perception in aquatic environments has driven the evolution of diverse sensory modalities in aquatic mammals. Dolphins largely use echolocation for prey capture in the face of limited visual and olfactory cues. Multiple foraging modes exist, although an understanding of how sensory systems are adapted to environmental and prey characteristics is limited. This is especially true for animals with extreme sensory specialisation, such as South Asian river dolphins of the genus Platanista. This taxon is effectively blind and retains plesiomorphic traits from its once-diverse ancestors. Distributed in murky rivers of the Indus-Ganga-Brahmaputra basins, it is thought to use mainly echolocation for feeding on fish and shrimp. We hypothesised that foraging modes used by Platanista differ according to prey position in the water column (at the river surface, mid-column, and bottom) and are mediated by ecomorphology, acoustics, prey characteristics, and habitat features. To test this, we combined a detailed review of the literature (anatomy-physiology-morphology studies, observations in captivity) with preliminary field observations and acoustics studies to investigate foraging mode selection. Platanista displays peculiar foraging and feeding behaviours, including side swimming, rotational feeding, and grasp-suction feeding. Feeding is restricted to small prey with low body depth. At the river surface and bottom, echolocation-based foraging may not be efficient due to acoustic reflection or reverberation effects. Platanista uses echolocation clicks to scan and detect prey at distances of about 20 m across the river mid-column, possibly switching to passive listening at the surface, and electroreception at the bottom, to maximise prey capture rate and feeding success. Platanista is remarkable for its ability to persist in some of the most intensively used and abused river basins of the world. Using echolocation, electroreception, and passive listening might reduce overall foraging costs and contribute to the adaptability of the taxon.\n
\n\n\n\n \n\n \n \n \n \n \n \n Redefinition and Sexual Difference of Contact Calls in Belugas (Delphinapterus leucas).\n \n \n \n \n\n\n \n Mishima, Y.; Morisaka, T.; Mishima, Y.; Sunada, T.; and Miyamoto, Y.\n\n\n \n\n\n\n Aquatic Mammals, 43(5): 538-554. 9 2018.\n \n\n\n\n
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\n\n\n\n@article{\n title = {Redefinition and Sexual Difference of Contact Calls in Belugas (Delphinapterus leucas)},\n type = {article},\n year = {2018},\n keywords = {Acoustic communication,Cetacean,Classification,Delphinidae,Individuality,Repertoire,Vocal exchange},\n pages = {538-554},\n volume = {43},\n websites = {https://www.aquaticmammalsjournal.org/index.php?option=com_content&view=article&id=1785:redefinition-and-sexual-difference-of-contact-calls-in-belugas-delphinapterus-leucas&catid=171&Itemid=326},\n month = {9},\n day = {15},\n id = {6fdcf920-02fc-3b73-a5f7-1a4b0f93874c},\n created = {2019-07-30T00:22:10.631Z},\n file_attached = {false},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2019-07-30T00:22:10.631Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n bibtype = {article},\n author = {Mishima, Yuka and Morisaka, Tadamichi and Mishima, Yuki and Sunada, Tadashi and Miyamoto, Yoshinori},\n doi = {10.1578/AM.44.5.2018.538},\n journal = {Aquatic Mammals},\n number = {5}\n}\n\n
\n\n \n \n 2017\n \n \n (4)\n \n \n
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\n \n \n\n \n \n \n \n \n 並走する流線型物体の間に働く流体力学的効果の分析.\n \n \n \n\n\n \n 三宅, 真.; 奈良, 祥.; 稲田, 喜.; 高橋, 俊.; 酒井, 麻.; and 森阪, 匡.\n\n\n \n\n\n\n 日本航空宇宙学会論文集, 65(1): 27-31. 2017.\n \n\n\n\n
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\n\n\n\n@article{\n title = {並走する流線型物体の間に働く流体力学的効果の分析},\n type = {article},\n year = {2017},\n pages = {27-31},\n volume = {65},\n id = {c9ad4647-d499-3afb-9f8b-0d89d0e20a46},\n created = {2017-07-18T05:59:58.802Z},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2017-07-18T06:00:20.690Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n source_type = {JOUR},\n private_publication = {false},\n bibtype = {article},\n author = {三宅, 真亜子 and 奈良, 祥太朗 and 稲田, 喜信 and 高橋, 俊 and 酒井, 麻衣 and 森阪, 匡通},\n doi = {10.2322/jjsass.65.27},\n journal = {日本航空宇宙学会論文集},\n number = {1}\n}\n\n \n\n \n \n \n \n \n \n Fluid dynamic effects of small projections based on dorsal ridge tubercles of the finless porpoise.\n \n \n \n \n\n\n \n INADA, Y.; TAMIYA, N.; MIYAKE, M.; MORISAKA, T.; SAKAI, M.; WAKABAYASHI, I.; KASAMATSU, M.; and UEKUSA, Y.\n\n\n \n\n\n\n Journal of Biomechanical Science and Engineering, 12(3): 16-00700-16-00700. 2017.\n \n\n\n\n
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\n\n\n\n@article{\n title = {Fluid dynamic effects of small projections based on dorsal ridge tubercles of the finless porpoise},\n type = {article},\n year = {2017},\n pages = {16-00700-16-00700},\n volume = {12},\n websites = {https://www.jstage.jst.go.jp/article/jbse/12/3/12_16-00700/_article},\n id = {8f615e57-e1b6-3fb7-9812-3e9885b5dd5e},\n created = {2017-07-18T05:59:58.812Z},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2023-07-01T08:19:26.886Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n source_type = {JOUR},\n private_publication = {false},\n bibtype = {article},\n author = {INADA, Yoshinobu and TAMIYA, Naoki and MIYAKE, Maako and MORISAKA, Tadamichi and SAKAI, Mai and WAKABAYASHI, Ikuo and KASAMATSU, Masahiko and UEKUSA, Yasuhiro},\n doi = {10.1299/jbse.16-00700},\n journal = {Journal of Biomechanical Science and Engineering},\n number = {3}\n}\n\n \n\n \n \n \n \n \n 御蔵島に生息するミナミハンドウイルカ(Tursiops aduncus)の親子鑑定.\n \n \n \n\n\n \n 北夕紀; 村山美穂; 小木万布; 森阪匡通; 酒井麻衣; and 椎名隆\n\n\n \n\n\n\n DNA多型, 25(1): 52-57. 2017.\n \n\n\n\n
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\n\n\n\n@article{\n title = {御蔵島に生息するミナミハンドウイルカ(Tursiops aduncus)の親子鑑定},\n type = {article},\n year = {2017},\n pages = {52-57},\n volume = {25},\n id = {ce9de742-e440-3dc6-b715-4e60de0b5a3e},\n created = {2017-09-28T04:01:31.424Z},\n file_attached = {false},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2017-09-28T04:01:31.424Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n bibtype = {article},\n author = {北夕紀, undefined and 村山美穂, undefined and 小木万布, undefined and 森阪匡通, undefined and 酒井麻衣, undefined and 椎名隆, undefined},\n journal = {DNA多型},\n number = {1}\n}\n\n \n\n \n \n \n \n \n \n Emigration of Indo-Pacific bottlenose Dolphins (Tursiops aduncus) from Mikura island, Japan.\n \n \n \n \n\n\n \n Tsuji, K.; Kogi, K.; Sakai, M.; and Morisaka, T.\n\n\n \n\n\n\n Aquatic Mammals, 43(6): 585-593. 11 2017.\n \n\n\n\n
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\n\n\n\n@article{\n title = {Emigration of Indo-Pacific bottlenose Dolphins (Tursiops aduncus) from Mikura island, Japan},\n type = {article},\n year = {2017},\n pages = {585-593},\n volume = {43},\n websites = {http://www.aquaticmammalsjournal.org/index.php?option=com_content&view=article&id=1731:emigration-of-indo-pacific-bottlenose-dolphins-tursiops-aduncus-from-mikura-island-japan&catid=163&Itemid=326},\n month = {11},\n day = {15},\n id = {c421f83d-0c0e-3750-bbd5-ec9c71a627d4},\n created = {2018-02-14T01:53:36.204Z},\n accessed = {2018-02-14},\n file_attached = {false},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2018-02-14T01:55:55.524Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n bibtype = {article},\n author = {Tsuji, Kimika and Kogi, Kazunobu and Sakai, Mai and Morisaka, Tadamichi},\n doi = {10.1578/AM.43.6.2017.585},\n journal = {Aquatic Mammals},\n number = {6}\n}\n\n
\n\n \n \n 2016\n \n \n (3)\n \n \n
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\n \n \n\n \n \n \n \n \n A simple and non-invasive measurement method important for conserving large animals underwater.\n \n \n \n\n\n \n Morisaka, T.; Sakai, M.; Kogi, K.; and Hama, H.\n\n\n \n\n\n\n Genetic and Evolutionary Computing, pages 105-111. Zin, T., T.; Lin, J., C.; Pan, J.; Tin, P.; and Yokota, M., editor(s). Springer, 2016.\n \n\n\n\n
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\n\n\n\n@inbook{\n type = {inbook},\n year = {2016},\n pages = {105-111},\n publisher = {Springer},\n id = {6f4a39c2-a763-3d34-8628-af50764bb404},\n created = {2015-12-10T11:00:26.000Z},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2017-03-22T13:23:15.952Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n bibtype = {inbook},\n author = {Morisaka, Tadamichi and Sakai, Mai and Kogi, Kazunobu and Hama, Hiromitsu},\n editor = {Zin, Thi Thi and Lin, Jerry Chun-Wei and Pan, Jeng-Shyang and Tin, Pyke and Yokota, Mitsuhiro},\n chapter = {A simple and non-invasive measurement method important for conserving large animals underwater},\n title = {Genetic and Evolutionary Computing}\n}\n\n \n\n \n \n \n \n \n \n A wild Indo-Pacific bottlenose dolphin adopts a socially and genetically distant neonate.\n \n \n \n \n\n\n \n Sakai, M.; Kita, Y., F.; Kogi, K.; Shinohara, M.; Morisaka, T.; Shiina, T.; and Inoue-Murayama, M.\n\n\n \n\n\n\n Scientific Reports, 6: 23902. 4 2016.\n \n\n\n\n
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\n\n\n\n@article{\n title = {A wild Indo-Pacific bottlenose dolphin adopts a socially and genetically distant neonate},\n type = {article},\n year = {2016},\n pages = {23902},\n volume = {6},\n websites = {http://www.nature.com/srep/2016/160406/srep23902/full/srep23902.html},\n month = {4},\n publisher = {Nature Publishing Group},\n day = {6},\n id = {bc8b6084-dce1-39d9-884e-61508958b31a},\n created = {2016-04-14T10:46:16.000Z},\n accessed = {2016-04-07},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2017-03-22T13:23:15.952Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n language = {en},\n private_publication = {false},\n bibtype = {article},\n author = {Sakai, Mai and Kita, Yuki F. and Kogi, Kazunobu and Shinohara, Masanori and Morisaka, Tadamichi and Shiina, Takashi and Inoue-Murayama, Miho},\n doi = {10.1038/srep23902},\n journal = {Scientific Reports}\n}\n\n \n\n \n \n \n \n \n \n アクリル窓に設置した水中マイクの受波感度-水族館におけるイルカ音声研究の簡便化をめざして-.\n \n \n \n \n\n\n \n 吉田弥生; 森阪匡通; 中原史生; and 斎藤繁実\n\n\n \n\n\n\n 東海大学海洋研究所研究報告, 37: 1-6. 2016.\n \n\n\n\n
\n\n\n\n \n \n![\"アクリル窓に設置した水中マイクの受波感度-水族館におけるイルカ音声研究の簡便化をめざして-](\"//bibbase.org/img/filetypes/pdf.svg\"\n\t "\\"Website\\"\n\t")
Website\n \n \n\n \n\n \n link\n \n \n\n bibtex\n \n\n \n \n \n abstract \n \n\n \n \n \n 1 download\n \n \n\n \n \n \n \n \n \n \n\n \n \n \n\n\n\n
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Website\n \n \n\n \n\n \n link\n \n \n\n bibtex\n \n\n \n \n \n abstract \n \n\n \n \n \n 1 download\n \n \n\n \n \n \n \n \n \n \n\n \n \n \n\n\n\n\n
\n\n\n@article{\n title = {アクリル窓に設置した水中マイクの受波感度-水族館におけるイルカ音声研究の簡便化をめざして-},\n type = {article},\n year = {2016},\n pages = {1-6},\n volume = {37},\n websites = {http://www.scc.u-tokai.ac.jp/~289077/bulletin/files_for_bulletin/37-01-06_YOSHIDA_F2.pdf},\n id = {e9cba38e-dd14-38c1-a39a-71466eb68b6c},\n created = {2016-05-06T03:55:14.000Z},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2017-03-22T13:23:15.952Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n abstract = {Sound recording system for captive aquatic animals (especially dolphins) in a tank is developed where small hydrophones are externally attached to the acrylic glass of the tank. Here this system is evaluated by measuring the sound transmission loss of the acrylic plates with three different thicknesses (15, 20 and 30 mm) for various frequencies in the range between 3 -130 kHz. Results do not show any correlations between acrylic plate thickness and the sound transmission loss for every frequency. In addition, the sound transmission loss shows great values between 3 -40 kHz, while it shows negative values between 50 -130 kHz regardless of the plate thickness. The former increased loss is due to the negative reflection at the interface between water and air. The latter gain is due to the enhanced sensitivity of the hydrophone with increased mechanical Q in air. Thus researchers who measure the sound pressure level with this system need to be careful of such variations of the receiving sensitivity.},\n bibtype = {article},\n author = {吉田弥生, undefined and 森阪匡通, undefined and 中原史生, undefined and 斎藤繁実, undefined},\n journal = {東海大学海洋研究所研究報告}\n}\n\n Sound recording system for captive aquatic animals (especially dolphins) in a tank is developed where small hydrophones are externally attached to the acrylic glass of the tank. Here this system is evaluated by measuring the sound transmission loss of the acrylic plates with three different thicknesses (15, 20 and 30 mm) for various frequencies in the range between 3 -130 kHz. Results do not show any correlations between acrylic plate thickness and the sound transmission loss for every frequency. In addition, the sound transmission loss shows great values between 3 -40 kHz, while it shows negative values between 50 -130 kHz regardless of the plate thickness. The former increased loss is due to the negative reflection at the interface between water and air. The latter gain is due to the enhanced sensitivity of the hydrophone with increased mechanical Q in air. Thus researchers who measure the sound pressure level with this system need to be careful of such variations of the receiving sensitivity.\n
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\n\n \n \n 2015\n \n \n (5)\n \n \n
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\n \n \n\n \n \n \n \n \n \n Juichi Yamagiwa, Leszek Karczmarski (eds): Primates and cetaceans: field research and conservation of complex mammalian societies.\n \n \n \n \n\n\n \n Morisaka, T.\n\n\n \n\n\n\n Primates, 56(1): 101-103. 1 2015.\n \n\n\n\n
\n\n\n\n \n \nWebsite\n \n \n\n \n \n doi\n \n \n\n \n link\n \n \n\n bibtex\n \n\n \n\n \n\n \n \n \n \n \n \n \n\n \n \n \n \n \n\n\n\n
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\n\n\n\n@article{\n title = {Juichi Yamagiwa, Leszek Karczmarski (eds): Primates and cetaceans: field research and conservation of complex mammalian societies},\n type = {article},\n year = {2015},\n pages = {101-103},\n volume = {56},\n websites = {http://link.springer.com/10.1007/s10329-014-0435-1},\n month = {1},\n day = {3},\n id = {d269d1f1-1b98-3bb3-9f20-0b880d973656},\n created = {2014-07-08T01:04:58.000Z},\n accessed = {2014-07-08},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2023-07-01T08:19:27.225Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n bibtype = {article},\n author = {Morisaka, Tadamichi},\n doi = {10.1007/s10329-014-0435-1},\n journal = {Primates},\n number = {1},\n keywords = {Book Review}\n}\n\n \n\n \n \n \n \n \n \n Detection of the nighttime distribution of Indo-Pacific bottlenose dolphins (Tursiops aduncus) around Mikura Island with stationed acoustic buoys.\n \n \n \n \n\n\n \n Morisaka, T.; Sakai, M.; and Kogi, K.\n\n\n \n\n\n\n Bulletin of Institute of Oceanic Research and Development, Tokai University, 36: 1-7. 2015.\n \n\n\n\n
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\n\n\n@article{\n title = {Detection of the nighttime distribution of Indo-Pacific bottlenose dolphins (Tursiops aduncus) around Mikura Island with stationed acoustic buoys},\n type = {article},\n year = {2015},\n pages = {1-7},\n volume = {36},\n websites = {http://www.scc.u-tokai.ac.jp/~289077/bulletin/files_for_bulletin/36_01-07morisaka.pdf},\n id = {70e42a1b-b949-341f-84d3-7e9b4033c9b1},\n created = {2015-05-07T23:34:46.000Z},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2018-08-30T05:12:25.803Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n citation_key = {Morisaka2015},\n folder_uuids = {7cd1dddd-cc00-4252-996a-71d1c2ea70a2},\n private_publication = {false},\n abstract = {Knowledge for the distribution pattern of an animal species is fundamental for our understanding and conservation of the animal. Since researchers cannot conduct visual surveys during night, the nighttime distribution pattern of the dolphins which can hunt prey in a dark condition is difficult to study. Here we describe the detection of the nighttime distribution of Indo-Pacific bottlenose dolphins around Mikura Island with custom-made stationed acoustic buoys.},\n bibtype = {article},\n author = {Morisaka, Tadamichi and Sakai, Mai and Kogi, Kazunobu},\n journal = {Bulletin of Institute of Oceanic Research and Development, Tokai University}\n}\n\n Knowledge for the distribution pattern of an animal species is fundamental for our understanding and conservation of the animal. Since researchers cannot conduct visual surveys during night, the nighttime distribution pattern of the dolphins which can hunt prey in a dark condition is difficult to study. Here we describe the detection of the nighttime distribution of Indo-Pacific bottlenose dolphins around Mikura Island with custom-made stationed acoustic buoys.\n
\n\n\n\n \n\n \n \n \n \n \n \n イルカ介在療法のこれまでとこれから.\n \n \n \n \n\n\n \n 門多真弥; 森阪匡通; 小木万布; 古田圭介; 亀崎直樹; and 大矢大\n\n\n \n\n\n\n 発達教育学研究 : 京都女子大学大学院発達教育学研究科博士後期課程研究紀要, (9): 43-51. 2015.\n \n\n\n\n
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\n\n\n\n@article{\n title = {イルカ介在療法のこれまでとこれから},\n type = {article},\n year = {2015},\n pages = {43-51},\n websites = {http://ci.nii.ac.jp/naid/40020432794/},\n publisher = {京都女子大学},\n id = {283ef50f-3914-3d2a-97b7-d71bcd20f905},\n created = {2015-06-02T01:25:25.000Z},\n accessed = {2015-06-02},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2017-03-22T13:23:15.952Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n citation_key = {40020432794},\n private_publication = {false},\n bibtype = {article},\n author = {門多真弥, undefined and 森阪匡通, undefined and 小木万布, undefined and 古田圭介, undefined and 亀崎直樹, undefined and 大矢大, undefined},\n journal = {発達教育学研究 : 京都女子大学大学院発達教育学研究科博士後期課程研究紀要},\n number = {9},\n keywords = {AAA,AAT}\n}\n\n \n\n \n \n \n \n \n \n Post-conflict affiliation as conflict management in captive bottlenose dolphins (Tursiops truncatus).\n \n \n \n \n\n\n \n Yamamoto, C.; Morisaka, T.; Furuta, K.; Ishibashi, T.; Yoshida, A.; Taki, M.; Mori, Y.; and Amano, M.\n\n\n \n\n\n\n Scientific Reports, 5(1): 14275. 11 2015.\n \n\n\n\n
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\n\n\n\n@article{\n title = {Post-conflict affiliation as conflict management in captive bottlenose dolphins (Tursiops truncatus)},\n type = {article},\n year = {2015},\n pages = {14275},\n volume = {5},\n websites = {http://www.nature.com/srep/2015/150922/srep14275/full/srep14275.html,http://www.nature.com/articles/srep14275},\n month = {11},\n publisher = {Nature Publishing Group},\n day = {22},\n id = {1cbd5072-cd9b-3831-aa69-a39fe2212afb},\n created = {2015-09-24T05:06:44.000Z},\n accessed = {2015-09-24},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2019-02-27T05:39:25.594Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n language = {en},\n private_publication = {false},\n bibtype = {article},\n author = {Yamamoto, Chisato and Morisaka, Tadamichi and Furuta, Keisuke and Ishibashi, Toshiaki and Yoshida, Akihiko and Taki, Michihiro and Mori, Yoshihisa and Amano, Masao},\n doi = {10.1038/srep14275},\n journal = {Scientific Reports},\n number = {1}\n}\n\n \n\n \n \n \n \n \n \n Individuality embedded in the isolation calls of captive beluga whales (Delphinapterus leucas).\n \n \n \n \n\n\n \n Mishima, Y.; Morisaka, T.; Itoh, M.; Matsuo, I.; Sakaguchi, A.; and Miyamoto, Y.\n\n\n \n\n\n\n Zoological Letters, 1(1): 27. 10 2015.\n \n\n\n\n
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\n\n\n@article{\n title = {Individuality embedded in the isolation calls of captive beluga whales (Delphinapterus leucas)},\n type = {article},\n year = {2015},\n pages = {27},\n volume = {1},\n websites = {http://www.zoologicalletters.com/content/1/1/27},\n month = {10},\n publisher = {BioMed Central Ltd},\n day = {1},\n id = {c78adad4-0d7a-33a8-a187-554845b7624f},\n created = {2015-10-03T00:48:24.000Z},\n accessed = {2015-10-03},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2018-09-08T22:04:42.731Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n language = {en},\n folder_uuids = {7475f247-52fa-41f9-886c-9edb3f3847fc,f7ec48fe-a53f-4502-887c-38454f3ea55f},\n private_publication = {false},\n abstract = {Species with fission-fusion social systems tend to exchange individualized contact calls to maintain group cohesion. Signature whistles by bottlenose dolphins are unique compared to the contact calls of other non-human animals in that they include identity information independent of voice cues. Further, dolphins copy the signatures of conspecifics and use them to label specific individuals. Increasing our knowledge of the contact calls of other cetaceans that have a fluid social structure may thus help us better understand the evolutionary and adaptive significance of all forms of individually distinctive calls. It was recently reported that one type of broadband pulsed sounds (PS1), rather than whistles, may function as individualized contact calls in captive belugas. The objective of this study was to assess the function and individual distinctiveness of PS1 calls in an isolation context. Recordings were made from five captive belugas, including both sexes and various ages.},\n bibtype = {article},\n author = {Mishima, Yuka and Morisaka, Tadamichi and Itoh, Miho and Matsuo, Ikuo and Sakaguchi, Aiko and Miyamoto, Yoshinori},\n doi = {10.1186/s40851-015-0028-x},\n journal = {Zoological Letters},\n number = {1},\n keywords = {beluga}\n}\n\n Species with fission-fusion social systems tend to exchange individualized contact calls to maintain group cohesion. Signature whistles by bottlenose dolphins are unique compared to the contact calls of other non-human animals in that they include identity information independent of voice cues. Further, dolphins copy the signatures of conspecifics and use them to label specific individuals. Increasing our knowledge of the contact calls of other cetaceans that have a fluid social structure may thus help us better understand the evolutionary and adaptive significance of all forms of individually distinctive calls. It was recently reported that one type of broadband pulsed sounds (PS1), rather than whistles, may function as individualized contact calls in captive belugas. The objective of this study was to assess the function and individual distinctiveness of PS1 calls in an isolation context. Recordings were made from five captive belugas, including both sexes and various ages.\n
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\n \n \n\n \n \n \n \n \n \n Signature whistles in free-ranging populations of Indo-Pacific bottlenose dolphins, Tursiops aduncus.\n \n \n \n \n\n\n \n Gridley, T.; Cockcroft, V., G.; Hawkins, E., R.; Blewitt, M., L.; Morisaka, T.; and Janik, V., M.\n\n\n \n\n\n\n Marine Mammal Science, 30(2): 512-527. 8 2014.\n \n\n\n\n
\n\n\n\n \n \nWebsite\n \n \n\n \n \n doi\n \n \n\n \n link\n \n \n\n bibtex\n \n\n \n\n \n \n \n 1 download\n \n \n\n \n \n \n \n \n \n \n\n \n \n \n \n \n\n\n\n
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\n\n\n\n@article{\n title = {Signature whistles in free-ranging populations of Indo-Pacific bottlenose dolphins, Tursiops aduncus},\n type = {article},\n year = {2014},\n pages = {512-527},\n volume = {30},\n websites = {http://doi.wiley.com/10.1111/mms.12054},\n month = {8},\n day = {5},\n id = {092026e4-a029-3f8b-afa3-3697df37988f},\n created = {2014-04-10T04:25:19.000Z},\n accessed = {2014-03-25},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2018-09-06T07:52:46.693Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n folder_uuids = {7475f247-52fa-41f9-886c-9edb3f3847fc,f7ec48fe-a53f-4502-887c-38454f3ea55f},\n private_publication = {false},\n bibtype = {article},\n author = {Gridley, Tess and Cockcroft, Victor G. and Hawkins, Elizabeth R. and Blewitt, Michelle Lemon and Morisaka, Tadamichi and Janik, Vincent M.},\n doi = {10.1111/mms.12054},\n journal = {Marine Mammal Science},\n number = {2},\n keywords = {reviewed}\n}\n\n \n\n \n \n \n \n \n \n A novel method for contact-free measurement of dolphin’s body size using a 3D Bézier curve.\n \n \n \n \n\n\n \n HAMA, H.; MORISAKA, T.; and ZIN, T., T.\n\n\n \n\n\n\n ICIC express letters. Part B, Applications : an international journal of research and surveys, 5(2): 583-587. 4 2014.\n \n\n\n\n
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\n\n\n\n@article{\n title = {A novel method for contact-free measurement of dolphin’s body size using a 3D Bézier curve},\n type = {article},\n year = {2014},\n keywords = {reviewed},\n pages = {583-587},\n volume = {5},\n websites = {http://ci.nii.ac.jp/naid/40019969118/},\n month = {4},\n publisher = {ICIC International},\n id = {15a25211-d913-3f65-b077-fa682eafb78a},\n created = {2014-10-01T03:09:04.000Z},\n accessed = {2014-10-01},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2017-03-22T13:23:15.952Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n citation_key = {HAMAHIROMITSU:2014-04},\n private_publication = {false},\n bibtype = {article},\n author = {HAMA, HIROMITSU and MORISAKA, TADAMICHI and ZIN, THI THI},\n journal = {ICIC express letters. Part B, Applications : an international journal of research and surveys},\n number = {2}\n}\n\n \n\n \n \n \n \n \n \n Captive Bottlenose Dolphins (Tursiops truncatus) Spontaneously Using Water Flow to Manipulate Objects.\n \n \n \n \n\n\n \n Yamamoto, C.; Furuta, K.; Taki, M.; and Morisaka, T.\n\n\n \n\n\n\n PLoS ONE, 9(9): e107796. 9 2014.\n \n\n\n\n
\n\n\n\n \n \nWebsite\n \n \n\n \n \n doi\n \n \n\n \n link\n \n \n\n bibtex\n \n\n \n \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n \n \n \n \n \n\n\n\n
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\n\n\n@article{\n title = {Captive Bottlenose Dolphins (Tursiops truncatus) Spontaneously Using Water Flow to Manipulate Objects},\n type = {article},\n year = {2014},\n keywords = {reviewed},\n pages = {e107796},\n volume = {9},\n websites = {http://dx.plos.org/10.1371/journal.pone.0107796},\n month = {9},\n publisher = {Public Library of Science},\n day = {24},\n id = {7184c127-1daa-314f-a6d2-023822b50801},\n created = {2014-10-01T03:11:23.000Z},\n accessed = {2014-09-25},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2017-03-22T13:23:15.952Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n abstract = {Several terrestrial animals and delphinids manipulate objects in a tactile manner, using parts of their bodies, such as their mouths or hands. In this paper, we report that bottlenose dolphins (Tursiops truncatus) manipulate objects not by direct bodily contact, but by spontaneous water flow. Three of four dolphins at Suma Aqualife Park performed object manipulation with food. The typical sequence of object manipulation consisted of a three step procedure. First, the dolphins released the object from the sides of their mouths while assuming a head-down posture near the floor. They then manipulated the object around their mouths and caught it. Finally, they ceased to engage in their head-down posture and started to swim. When the dolphins moved the object, they used the water current in the pool or moved their head. These results showed that dolphins manipulate objects using movements that do not directly involve contact between a body part and the object. In the event the dolphins dropped the object on the floor, they lifted it by making water flow in one of three methods: opening and closing their mouths repeatedly, moving their heads lengthwise, or making circular head motions. This result suggests that bottlenose dolphins spontaneously change their environment to manipulate objects. The reason why aquatic animals like dolphins do object manipulation by changing their environment but terrestrial animals do not may be that the viscosity of the aquatic environment is much higher than it is in terrestrial environments. This is the first report thus far of any non-human mammal engaging in object manipulation using several methods to change their environment.},\n bibtype = {article},\n author = {Yamamoto, Chisato and Furuta, Keisuke and Taki, Michihiro and Morisaka, Tadamichi},\n editor = {Engelmann, Jacob},\n doi = {10.1371/journal.pone.0107796},\n journal = {PLoS ONE},\n number = {9}\n}\n\n Several terrestrial animals and delphinids manipulate objects in a tactile manner, using parts of their bodies, such as their mouths or hands. In this paper, we report that bottlenose dolphins (Tursiops truncatus) manipulate objects not by direct bodily contact, but by spontaneous water flow. Three of four dolphins at Suma Aqualife Park performed object manipulation with food. The typical sequence of object manipulation consisted of a three step procedure. First, the dolphins released the object from the sides of their mouths while assuming a head-down posture near the floor. They then manipulated the object around their mouths and caught it. Finally, they ceased to engage in their head-down posture and started to swim. When the dolphins moved the object, they used the water current in the pool or moved their head. These results showed that dolphins manipulate objects using movements that do not directly involve contact between a body part and the object. In the event the dolphins dropped the object on the floor, they lifted it by making water flow in one of three methods: opening and closing their mouths repeatedly, moving their heads lengthwise, or making circular head motions. This result suggests that bottlenose dolphins spontaneously change their environment to manipulate objects. The reason why aquatic animals like dolphins do object manipulation by changing their environment but terrestrial animals do not may be that the viscosity of the aquatic environment is much higher than it is in terrestrial environments. This is the first report thus far of any non-human mammal engaging in object manipulation using several methods to change their environment.\n
\n\n\n\n \n\n \n \n \n \n \n \n Sound variation and function in captive Commerson's dolphins (Cephalorhynchus commersonii).\n \n \n \n \n\n\n \n Yoshida, Y., M.; Morisaka, T.; Sakai, M.; Iwasaki, M.; Wakabayashi, I.; Seko, A.; Kasamatsu, M.; Akamatsu, T.; and Kohshima, S.\n\n\n \n\n\n\n Behavioural processes, 108: 11-19. 9 2014.\n \n\n\n\n
\n\n\n\n \n \nWebsite\n \n \n\n \n \n doi\n \n \n\n \n link\n \n \n\n bibtex\n \n\n \n \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n \n \n \n \n \n\n\n\n
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\n\n\n@article{\n title = {Sound variation and function in captive Commerson's dolphins (Cephalorhynchus commersonii).},\n type = {article},\n year = {2014},\n keywords = {reviewed},\n pages = {11-19},\n volume = {108},\n websites = {http://www.sciencedirect.com/science/article/pii/S0376635714001855},\n month = {9},\n day = {16},\n id = {07daf98b-5119-3c4f-9800-1321e3ec04dd},\n created = {2014-10-01T03:27:37.000Z},\n accessed = {2014-10-01},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2017-03-22T13:23:15.952Z},\n read = {true},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n abstract = {Commerson's dolphin (Cephalorhynchus commersonii), one of the smallest dolphin species, has been reported to produce only narrow-band high-frequency (NBHF) clicks and no whistles. To clarify their sound repertoire and examine the function of each type, we analysed the sounds and behaviour of captive Commerson's dolphins in Toba Aquarium, Japan. All recorded sounds were NBHF clicks with peak frequency >110kHz. The recorded click-trains were categorised into four types based on the changing pattern of their Inter-click intervals (ICI): Decreasing type, with continuously decreasing ICI during the last part of the train; Increasing type, with continuously increasing ICI during the last part; Fluctuating type, with fluctuating ICI; and Burst-pulse type, with very short and constant ICI. The frequency of the Decreasing type increased when approaching an object newly introduced to the tank, suggesting that the sound is used for echolocation on approach. The Burst-pulse type suddenly increased in front of the object and was often oriented towards it, suggesting that it was used for echolocation in close proximity to the object. In contrast, the Increasing type was rarely recorded during approach, but increased when a dolphin approached another dolphin. The Increasing and Burst-pulse types also increased when dolphins began social behaviours. These results suggest that some NBHF clicks have functions other than echolocation, such as communication.},\n bibtype = {article},\n author = {Yoshida, Yayoi M and Morisaka, Tadamichi and Sakai, Mai and Iwasaki, Mari and Wakabayashi, Ikuo and Seko, Atsushi and Kasamatsu, Masahiko and Akamatsu, Tomonari and Kohshima, Shiro},\n doi = {10.1016/j.beproc.2014.08.017},\n journal = {Behavioural processes}\n}\n\n Commerson's dolphin (Cephalorhynchus commersonii), one of the smallest dolphin species, has been reported to produce only narrow-band high-frequency (NBHF) clicks and no whistles. To clarify their sound repertoire and examine the function of each type, we analysed the sounds and behaviour of captive Commerson's dolphins in Toba Aquarium, Japan. All recorded sounds were NBHF clicks with peak frequency >110kHz. The recorded click-trains were categorised into four types based on the changing pattern of their Inter-click intervals (ICI): Decreasing type, with continuously decreasing ICI during the last part of the train; Increasing type, with continuously increasing ICI during the last part; Fluctuating type, with fluctuating ICI; and Burst-pulse type, with very short and constant ICI. The frequency of the Decreasing type increased when approaching an object newly introduced to the tank, suggesting that the sound is used for echolocation on approach. The Burst-pulse type suddenly increased in front of the object and was often oriented towards it, suggesting that it was used for echolocation in close proximity to the object. In contrast, the Increasing type was rarely recorded during approach, but increased when a dolphin approached another dolphin. The Increasing and Burst-pulse types also increased when dolphins began social behaviours. These results suggest that some NBHF clicks have functions other than echolocation, such as communication.\n
\n\n\n\n \n\n \n \n \n \n \n \n 海のこころ，森のこころ―鯨類と霊長類の知性に関する比較認知科学―.\n \n \n \n \n\n\n \n 友永雅己; 森阪匡通; 中原史生; and 足立幾磨\n\n\n \n\n\n\n 哺乳類科学, 54(1): 103-106. 6 2014.\n \n\n\n\n
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\n\n\n\n@article{\n title = {海のこころ，森のこころ―鯨類と霊長類の知性に関する比較認知科学―},\n type = {article},\n year = {2014},\n pages = {103-106},\n volume = {54},\n websites = {https://www.jstage.jst.go.jp/article/mammalianscience/54/1/54_103/_article/-char/ja/},\n month = {6},\n day = {30},\n id = {10e7762b-468e-3b50-9a67-046fd9c5e575},\n created = {2014-10-01T03:48:10.000Z},\n accessed = {2014-10-01},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2017-03-22T13:23:15.952Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n bibtype = {article},\n author = {友永雅己, undefined and 森阪匡通, undefined and 中原史生, undefined and 足立幾磨, undefined},\n doi = {10.11238/mammalianscience.54.103},\n journal = {哺乳類科学},\n number = {1},\n keywords = {Non-reviewed}\n}\n\n \n\n \n \n \n \n \n \n アニマルセラピーとしての\"イルカ療法\" : イルカとのふれあいを通じて.\n \n \n \n \n\n\n \n 門多真弥; 森阪匡通; 亀崎直樹; and 大矢大\n\n\n \n\n\n\n 発達教育学研究 : 京都女子大学大学院発達教育学研究科博士後期課程研究紀要, (8): 55-60. 2014.\n \n\n\n\n
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\n\n\n\n@article{\n title = {アニマルセラピーとしての"イルカ療法" : イルカとのふれあいを通じて},\n type = {article},\n year = {2014},\n pages = {55-60},\n websites = {http://ci.nii.ac.jp/naid/120005459152/},\n publisher = {京都女子大学},\n id = {39fbb56f-fe9f-3e60-97fc-7332b8bec5da},\n created = {2014-10-01T04:11:12.000Z},\n accessed = {2014-10-01},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2017-03-22T13:23:15.952Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n citation_key = {門多真弥:2014},\n private_publication = {false},\n bibtype = {article},\n author = {門多真弥, undefined and 森阪匡通, undefined and 亀崎直樹, undefined and 大矢大, undefined},\n journal = {発達教育学研究 : 京都女子大学大学院発達教育学研究科博士後期課程研究紀要},\n number = {8},\n keywords = {Non-reviewed}\n}\n\n
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\n \n \n\n \n \n \n \n \n \n Exchange of “signature” calls in captive belugas (Delphinapterus leucas).\n \n \n \n \n\n\n \n Morisaka, T.; Yoshida, Y.; Akune, Y.; Mishima, H.; and Nishimoto, S.\n\n\n \n\n\n\n Journal of Ethology, 31(2): 141-149. 2013.\n \n\n\n\n
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\n\n\n@article{\n title = {Exchange of “signature” calls in captive belugas (Delphinapterus leucas)},\n type = {article},\n year = {2013},\n pages = {141-149},\n volume = {31},\n websites = {http://link.springer.com/10.1007/s10164-013-0358-0},\n id = {fe8ef0d7-7c21-33b7-8910-976321f20548},\n created = {2014-04-10T00:39:54.000Z},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2018-09-08T22:04:42.197Z},\n read = {true},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n folder_uuids = {7475f247-52fa-41f9-886c-9edb3f3847fc,f7ec48fe-a53f-4502-887c-38454f3ea55f},\n private_publication = {false},\n abstract = {Belugas (Delphinapterus leucas) produce echolocation clicks, burst pulses, and whistles. The sounds of 3 captive belugas were recorded using 2 hydrophones at the Port of Nagoya Public Aquarium. There were stable individual differences in the pulse patterning of one type of pulsed sounds (PS1 call), suggesting that belugas use these as ‘‘signature’’ calls. Eighty-eight percent of PS1 calls initiated PS1 calls from other animals within 1 s. PS1 calls repeated by the same individual occurred primarily when other belugas did not respond within 1 s of the first call. Belugas delayed successive PS1 calls when other belugas responded with a PS1 call within 1 s. There was no clear temporal pattern for whistles. It appears that the time limit for responding to calls is 1 s after the initial call. If other individuals do not respond to the PS1 call of a beluga within 1 s, belugas tend to repeat the call and wait for a response. The results of this study suggest that the belugas exchange their individual signatures by using PS1 calls, in a manner similar to that of signature whistles used by bottlenose dolphins.},\n bibtype = {article},\n author = {Morisaka, Tadamichi and Yoshida, Yayoi and Akune, Yuichiro and Mishima, Hideki and Nishimoto, Sayo},\n doi = {10.1007/s10164-013-0358-0},\n journal = {Journal of Ethology},\n number = {2},\n keywords = {reviewed}\n}\n\n Belugas (Delphinapterus leucas) produce echolocation clicks, burst pulses, and whistles. The sounds of 3 captive belugas were recorded using 2 hydrophones at the Port of Nagoya Public Aquarium. There were stable individual differences in the pulse patterning of one type of pulsed sounds (PS1 call), suggesting that belugas use these as ‘‘signature’’ calls. Eighty-eight percent of PS1 calls initiated PS1 calls from other animals within 1 s. PS1 calls repeated by the same individual occurred primarily when other belugas did not respond within 1 s of the first call. Belugas delayed successive PS1 calls when other belugas responded with a PS1 call within 1 s. There was no clear temporal pattern for whistles. It appears that the time limit for responding to calls is 1 s after the initial call. If other individuals do not respond to the PS1 call of a beluga within 1 s, belugas tend to repeat the call and wait for a response. The results of this study suggest that the belugas exchange their individual signatures by using PS1 calls, in a manner similar to that of signature whistles used by bottlenose dolphins.\n
\n\n\n\n \n\n \n \n \n \n \n Spontaneous Ejaculation in a Wild Indo-Pacific Bottlenose Dolphin (Tursiops aduncus).\n \n \n \n\n\n \n Morisaka, T.; Sakai, M.; Kogi, K.; Nakasuji, A.; Sakakibara, K.; Kasanuki, Y.; and Yoshioka, M.\n\n\n \n\n\n\n PLoS ONE, 8(8): e72879. 2013.\n \n\n\n\n
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\n\n\n@article{\n title = {Spontaneous Ejaculation in a Wild Indo-Pacific Bottlenose Dolphin (Tursiops aduncus)},\n type = {article},\n year = {2013},\n pages = {e72879},\n volume = {8},\n id = {b5d550de-34ba-3215-b8fa-5592ae42cfb3},\n created = {2014-04-10T00:39:54.000Z},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2017-03-22T13:23:15.952Z},\n read = {true},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n abstract = {Spontaneous ejaculation, which is defined as the release of seminal fluids without apparent sexual stimulation, has been documented in boreoeutherian mammals. Here we report spontaneous ejaculation in a wild Indo-Pacific bottlenose dolphin (Tursiops aduncus), and present a video of this rare behavior. This is the first report of spontaneous ejaculation by an aquatic mammal, and the first video of this behavior in animals to be published in a scientific journal.},\n bibtype = {article},\n author = {Morisaka, Tadamichi and Sakai, Mai and Kogi, Kazunobu and Nakasuji, Akane and Sakakibara, Kasumi and Kasanuki, Yuria and Yoshioka, Motoi},\n journal = {PLoS ONE},\n number = {8},\n keywords = {reviewed}\n}\n\n Spontaneous ejaculation, which is defined as the release of seminal fluids without apparent sexual stimulation, has been documented in boreoeutherian mammals. Here we report spontaneous ejaculation in a wild Indo-Pacific bottlenose dolphin (Tursiops aduncus), and present a video of this rare behavior. This is the first report of spontaneous ejaculation by an aquatic mammal, and the first video of this behavior in animals to be published in a scientific journal.\n
\n\n\n\n \n\n \n \n \n \n \n \n Mother–calf interactions and social behavior development in Commerson’s dolphins (Cephalorhynchus commersonii).\n \n \n \n \n\n\n \n Sakai, M.; Morisaka, T.; Iwasaki, M.; Yoshida, Y.; Wakabayashi, I.; Seko, A.; Kasamatsu, M.; and Kohshima, S.\n\n\n \n\n\n\n Journal of Ethology, 31(3): 305-313. 2013.\n \n\n\n\n
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\n\n\n@article{\n title = {Mother–calf interactions and social behavior development in Commerson’s dolphins (Cephalorhynchus commersonii)},\n type = {article},\n year = {2013},\n keywords = {reviewed},\n pages = {305-313},\n volume = {31},\n websites = {http://link.springer.com/10.1007/s10164-013-0380-2},\n id = {71262e2c-27c2-3a36-8a41-8ecc1f3366f4},\n created = {2014-04-10T00:39:54.000Z},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2017-03-22T13:23:15.952Z},\n read = {true},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n abstract = {Mother–calf interactions and the behaviors of mothers during separation from their calves were examined in four Commerson’s dolphin (Cephalorhynchus commer- sonii) mother–calf pairs. Four infants were observed: 56.8 h over 30 days from birth to 263 days of age, 36.9 h over 20 days from birth to 149 days of age, 10.4 h over 3 days from birth to 2 days of age, and 15.0 h over 3 days from birth to 2 days of age. All four pairs shared common characteristics in the rate and frequencies of mother–calf interactions and the behaviors of mothers during the first week of life. After the first week, individual differences in changes in the frequency of each behavior were observed. The three behaviors considered representative of maternal care (parallel swimming, synchronous breathing, and body- to-body contact) were frequently performed in the first week; thereafter, the frequencies declined. Separate behaviors of mothers were infrequent during the first week and increased with an increase in infants’ age. Bumping by infants increased with time, suggesting an increase in soliciting by calves and conflict between mothers and calves. The frequency of flipper-to-body rubbing also changed but in a complex manner, probably because the calves needed to learn how to perform this behavior from their mothers and because initiator and recipient of this behavior can be changed quickly.},\n bibtype = {article},\n author = {Sakai, Mai and Morisaka, T and Iwasaki, Mari and Yoshida, Yayoi and Wakabayashi, Ikuo and Seko, Atsushi and Kasamatsu, Masahiko and Kohshima, Shiro},\n journal = {Journal of Ethology},\n number = {3}\n}\n\n Mother–calf interactions and the behaviors of mothers during separation from their calves were examined in four Commerson’s dolphin (Cephalorhynchus commer- sonii) mother–calf pairs. Four infants were observed: 56.8 h over 30 days from birth to 263 days of age, 36.9 h over 20 days from birth to 149 days of age, 10.4 h over 3 days from birth to 2 days of age, and 15.0 h over 3 days from birth to 2 days of age. All four pairs shared common characteristics in the rate and frequencies of mother–calf interactions and the behaviors of mothers during the first week of life. After the first week, individual differences in changes in the frequency of each behavior were observed. The three behaviors considered representative of maternal care (parallel swimming, synchronous breathing, and body- to-body contact) were frequently performed in the first week; thereafter, the frequencies declined. Separate behaviors of mothers were infrequent during the first week and increased with an increase in infants’ age. Bumping by infants increased with time, suggesting an increase in soliciting by calves and conflict between mothers and calves. The frequency of flipper-to-body rubbing also changed but in a complex manner, probably because the calves needed to learn how to perform this behavior from their mothers and because initiator and recipient of this behavior can be changed quickly.\n
\n\n\n\n \n\n \n \n \n \n \n \n A Mobile Measurement System for Sound Source Level of Wild Dolphin Whistles.\n \n \n \n \n\n\n \n Morisaka, T.; Sakai, M.; Kogi, K.; Shinke, T.; Zin, T.; and Hama, H.\n\n\n \n\n\n\n Memoirs of the Faculty of Engineering, Osaka City University, 54: 25-29. 12 2013.\n \n\n\n\n
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\n\n\n\n@article{\n title = {A Mobile Measurement System for Sound Source Level of Wild Dolphin Whistles},\n type = {article},\n year = {2013},\n keywords = {non-reviewed},\n pages = {25-29},\n volume = {54},\n websites = {http://ci.nii.ac.jp/naid/110009656570/},\n month = {12},\n publisher = {大阪市立大学},\n id = {1415e5fe-ff7a-3f50-853e-485c8ad79188},\n created = {2014-10-01T03:43:30.000Z},\n accessed = {2014-10-01},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2017-03-22T13:23:15.952Z},\n read = {true},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n citation_key = {MorisakaTadamichi:2013-12},\n private_publication = {false},\n bibtype = {article},\n author = {Morisaka, Tadamichi and Sakai, Mai and Kogi, Kazunobu and Shinke, Tomio and Zin, Thithi and Hama, Hiromitsu},\n journal = {Memoirs of the Faculty of Engineering, Osaka City University}\n}\n\n \n\n \n \n \n \n \n \n イルカと泳ぐ : 適切な「イルカ観」と持続可能なイルカスイムに向けて (特集 2012年度関西シンポジウム ヒトと動物の関わり : 癒しから治療へ).\n \n \n \n \n\n\n \n 森阪匡通; 酒井麻衣; and 小木万布\n\n\n \n\n\n\n ヒトと動物の関係学会誌 = Japanese journal of human animal relations, (35): 23-27. 7 2013.\n \n\n\n\n
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\n\n\n\n@article{\n title = {イルカと泳ぐ : 適切な「イルカ観」と持続可能なイルカスイムに向けて (特集 2012年度関西シンポジウム ヒトと動物の関わり : 癒しから治療へ)},\n type = {article},\n year = {2013},\n pages = {23-27},\n websites = {http://ci.nii.ac.jp/naid/40019744100/},\n month = {7},\n publisher = {ヒトと動物の関係学会},\n id = {a500c29e-68db-3d4f-830a-b9f5f3001b72},\n created = {2014-10-01T04:08:49.000Z},\n accessed = {2014-10-01},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2017-03-22T13:23:15.952Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n citation_key = {森阪匡通:2013-07},\n private_publication = {false},\n bibtype = {article},\n author = {森阪匡通, undefined and 酒井麻衣, undefined and 小木万布, undefined},\n journal = {ヒトと動物の関係学会誌 = Japanese journal of human animal relations},\n number = {35},\n keywords = {Non-reviewed}\n}\n\n
\n\n \n \n 2012\n \n \n (2)\n \n \n
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\n \n \n\n \n \n \n \n \n Evolution of communication sounds in odontocetes : A review.\n \n \n \n\n\n \n Morisaka, T.\n\n\n \n\n\n\n International Journal of Comparative Psychology, 25: 1-20. 2012.\n \n\n\n\n
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\n\n\n@article{\n title = {Evolution of communication sounds in odontocetes : A review},\n type = {article},\n year = {2012},\n pages = {1-20},\n volume = {25},\n id = {1db27e76-a593-369c-b035-6cede9ed3fac},\n created = {2014-04-10T00:39:52.000Z},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2018-09-12T22:01:27.732Z},\n read = {true},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n folder_uuids = {7475f247-52fa-41f9-886c-9edb3f3847fc},\n private_publication = {false},\n abstract = {The evolutional pathway of communication sounds (i.e., whistles) in odontocetes is reviewed using recent acoustic and phylogenetic studies. The common ancestor of Ziphiidae, Inioidea, and Delphinoidea acquired the ability to whistle in the early Oligocene. Subsequently, Pontoporiidae, Phocoenidae, and the genus Cephalorhynchus lost the ability to whistle and evolved narrow-band high-frequency (NBHF) clicks. I hypothesize that sexual selection based on acoustic signaling contributed to the evolution of whistle. However, group size cannot be excluded as the reason for whistle emergence. The event of whistle loss and replacement with NBHF clicks occurred on three independent occasions after killer whale divergence, through the reconstruction of sound-producing organs. Species with whistle loss may use alternative methods to compensate for whistle information, such as tactile communication. Further research on acoustic communication by Ziphiidae, Inioidea, Monodontidae, and the genus Cephalorhynchus is essential to clarify the evolutional pathway of odontocete whistles.},\n bibtype = {article},\n author = {Morisaka, T},\n journal = {International Journal of Comparative Psychology},\n keywords = {reviewed}\n}\n\n The evolutional pathway of communication sounds (i.e., whistles) in odontocetes is reviewed using recent acoustic and phylogenetic studies. The common ancestor of Ziphiidae, Inioidea, and Delphinoidea acquired the ability to whistle in the early Oligocene. Subsequently, Pontoporiidae, Phocoenidae, and the genus Cephalorhynchus lost the ability to whistle and evolved narrow-band high-frequency (NBHF) clicks. I hypothesize that sexual selection based on acoustic signaling contributed to the evolution of whistle. However, group size cannot be excluded as the reason for whistle emergence. The event of whistle loss and replacement with NBHF clicks occurred on three independent occasions after killer whale divergence, through the reconstruction of sound-producing organs. Species with whistle loss may use alternative methods to compensate for whistle information, such as tactile communication. Further research on acoustic communication by Ziphiidae, Inioidea, Monodontidae, and the genus Cephalorhynchus is essential to clarify the evolutional pathway of odontocete whistles.\n
\n\n\n\n \n\n \n \n \n \n \n \n Low prevalence of visual impairment in a coastal population of gray seals (Halichoerus grypus) in the Gulf of St. Lawrence, Canada.\n \n \n \n \n\n\n \n Kot, B., W.; Morisaka, T.; Sears, R.; Samuelson, D.; and Marshall, C., D.\n\n\n \n\n\n\n Aquatic Mammals, 38(4): 423-427. 2012.\n \n\n\n\n
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\n\n\n\n@article{\n title = {Low prevalence of visual impairment in a coastal population of gray seals (Halichoerus grypus) in the Gulf of St. Lawrence, Canada},\n type = {article},\n year = {2012},\n pages = {423-427},\n volume = {38},\n websites = {dx.doi.org/10.1578/AM.38.4.2012.423},\n id = {9518df56-e890-3060-8900-597f5f77041d},\n created = {2016-01-07T03:40:53.000Z},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2017-03-22T13:23:15.952Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n bibtype = {article},\n author = {Kot, Brian W and Morisaka, Tadamichi and Sears, Richard and Samuelson, Don and Marshall, Christopher D.},\n journal = {Aquatic Mammals},\n number = {4}\n}\n\n
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\n \n \n\n \n \n \n \n \n Echolocation signals of Heaviside's dolphins (Cephalorhynchus heavisidii).\n \n \n \n\n\n \n Morisaka, T.; Karczmarski, L.; Akamatsu, T.; Sakai, M.; Dawson, S.; and Thornton, M.\n\n\n \n\n\n\n The Journal of the Acoustical Society of America, 129(1): 449-457. 2011.\n \n\n\n\n
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\n\n\n@article{\n title = {Echolocation signals of Heaviside's dolphins (Cephalorhynchus heavisidii).},\n type = {article},\n year = {2011},\n pages = {449-457},\n volume = {129},\n institution = {Mammal Research Institute, Department of Zoology and Entomology, University of Pretoria, c/o P.O. Box 61, Cape Town 8000, South Africa. chaka@wrc.kyoto-u.ac.jp},\n id = {f13d27ed-7299-3508-a4d3-e39688c353cc},\n created = {2014-04-10T00:39:54.000Z},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2018-09-06T07:06:22.023Z},\n read = {true},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n folder_uuids = {f7ec48fe-a53f-4502-887c-38454f3ea55f},\n private_publication = {false},\n abstract = {Field recordings of echolocation signals produced by Heaviside's dolphins (Cephalorhynchus heavisidii) were made off the coast of South Africa using a hydrophone array system. The system consisted of three hydrophones and an A-tag (miniature stereo acoustic data-logger). The mean centroid frequency was 125 kHz, with a -3 dB bandwidth of 15 kHz and -10 dB duration of 74 μs. The mean back-calculated apparent source level was 173 dB re 1 μPa(p.-p.). These characteristics are very similar to those found in other Cephalorhynchus species, and such narrow-band high-frequency echolocation clicks appear to be a defining characteristic of the Cephalorhynchus genus. Click bursts with very short inter-click intervals (up to 2 ms) were also recorded, which produced the "cry" sound reported in other Cephalorhynchus species. Since inter-click intervals correlated positively to click duration and negatively to bandwidth, Heaviside's dolphins may adjust their click duration and bandwidth based on detection range. The bimodal distribution of the peak frequency and stable bimodal peaks in spectra of individual click suggest a slight asymmetry in the click production mechanism.},\n bibtype = {article},\n author = {Morisaka, Tadamichi and Karczmarski, Leszek and Akamatsu, Tomonari and Sakai, Mai and Dawson, Steve and Thornton, Meredith},\n doi = {10.1121/1.3519401},\n journal = {The Journal of the Acoustical Society of America},\n number = {1},\n keywords = {reviewed}\n}\n\n Field recordings of echolocation signals produced by Heaviside's dolphins (Cephalorhynchus heavisidii) were made off the coast of South Africa using a hydrophone array system. The system consisted of three hydrophones and an A-tag (miniature stereo acoustic data-logger). The mean centroid frequency was 125 kHz, with a -3 dB bandwidth of 15 kHz and -10 dB duration of 74 μs. The mean back-calculated apparent source level was 173 dB re 1 μPa(p.-p.). These characteristics are very similar to those found in other Cephalorhynchus species, and such narrow-band high-frequency echolocation clicks appear to be a defining characteristic of the Cephalorhynchus genus. Click bursts with very short inter-click intervals (up to 2 ms) were also recorded, which produced the \"cry\" sound reported in other Cephalorhynchus species. Since inter-click intervals correlated positively to click duration and negatively to bandwidth, Heaviside's dolphins may adjust their click duration and bandwidth based on detection range. The bimodal distribution of the peak frequency and stable bimodal peaks in spectra of individual click suggest a slight asymmetry in the click production mechanism.\n
\n\n\n\n \n\n \n \n \n \n \n 伊豆諸島御蔵島周辺海域で観察されたアオウミガメによるクラゲ捕食.\n \n \n \n\n\n \n 森阪匡通; 酒井麻衣; 小木万布; 久保田信; and 亀崎直樹\n\n\n \n\n\n\n うみがめニュースレター, 89: 15-16. 2011.\n \n\n\n\n
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\n\n\n\n@article{\n title = {伊豆諸島御蔵島周辺海域で観察されたアオウミガメによるクラゲ捕食},\n type = {article},\n year = {2011},\n pages = {15-16},\n volume = {89},\n id = {d1591311-0b97-3c24-8296-3faa78e7b204},\n created = {2015-05-20T05:58:33.000Z},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2017-03-22T13:23:15.952Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n bibtype = {article},\n author = {森阪匡通, undefined and 酒井麻衣, undefined and 小木万布, undefined and 久保田信, undefined and 亀崎直樹, undefined},\n journal = {うみがめニュースレター},\n keywords = {green turtle}\n}\n\n \n\n \n \n \n \n \n \n Reactions of Heaviside's Dolphins to Tagging Attempts using Remotely-Deployed Suction-Cup Tags.\n \n \n \n \n\n\n \n Sakai, M.; Karczmarski, L.; Morisaka, T.; and Thornton, M.\n\n\n \n\n\n\n South African Journal of Wildlife Research, 41(1): 134-138. 4 2011.\n \n\n\n\n
\n\n\n\n \n \nWebsite\n \n \n\n \n \n doi\n \n \n\n \n link\n \n \n\n bibtex\n \n\n \n \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n \n \n \n \n \n \n \n \n \n \n \n\n\n\n
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\n\n\n@article{\n title = {Reactions of Heaviside's Dolphins to Tagging Attempts using Remotely-Deployed Suction-Cup Tags},\n type = {article},\n year = {2011},\n keywords = {Cephalorhynchus heavisidii,Heaviside's dolphin,reactions to tagging,suction-cup tag},\n pages = {134-138},\n volume = {41},\n websites = {http://www.bioone.org/doi/abs/10.3957/056.041.0116},\n month = {4},\n id = {7d89be0e-fc07-3c0a-a5c2-694f1e5dc0bb},\n created = {2017-04-18T05:56:31.142Z},\n file_attached = {false},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2023-07-01T08:19:26.552Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n abstract = {Tagging attempts of Heaviside's dolphins (Cephalo-rhynchus heavisidii) using a remotely-deployed suction-cup tag were performed in Table Bay and St Helena Bay on the southwest coast of South Africa. The observed reactions of dolphins indicate that this tagging approach has negligible impacts on the dolphin behaviour and Heaviside's dolphins might be tagged with suction cup tags without adverse affects.},\n bibtype = {article},\n author = {Sakai, Mai and Karczmarski, Leszek and Morisaka, Tadamichi and Thornton, Meredith},\n doi = {10.3957/056.041.0116},\n journal = {South African Journal of Wildlife Research},\n number = {1}\n}\n\n Tagging attempts of Heaviside's dolphins (Cephalo-rhynchus heavisidii) using a remotely-deployed suction-cup tag were performed in Table Bay and St Helena Bay on the southwest coast of South Africa. The observed reactions of dolphins indicate that this tagging approach has negligible impacts on the dolphin behaviour and Heaviside's dolphins might be tagged with suction cup tags without adverse affects.\n
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\n \n \n\n \n \n \n \n \n Recent Studies on Captive Cetaceans in Japan: Working in Tandem with Studies on Cetaceans in the Wild.\n \n \n \n\n\n \n Morisaka, T.; Kohshima, S.; Yoshioka, M.; Suzuki, M.; and Nakahara, F.\n\n\n \n\n\n\n International Journal of Comparative Psychology, 23: 644-663. 2010.\n \n\n\n\n
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\n\n\n@article{\n title = {Recent Studies on Captive Cetaceans in Japan: Working in Tandem with Studies on Cetaceans in the Wild},\n type = {article},\n year = {2010},\n pages = {644-663},\n volume = {23},\n id = {45608ab4-0436-3bab-a22e-46a12056b361},\n created = {2014-04-10T00:39:53.000Z},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2017-03-22T13:23:15.952Z},\n read = {true},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n abstract = {Recent technological advances have allowed researchers to acquire a vast amount of information on wild cetaceans, much of which had previously been inaccessible. However, despite these new technologies, existing studies on cetaceans in captivity remain valuable. In this article, we review the recent research conducted on captive cetaceans in Japan to show their importance. We indexed the existing studies regarding behavior (resting behavior, vocal development, social behavior, and behavior differences between species), comparative cognition (echolocation ability), stress reduction, and reproductive physiology. The resulting data, as well as an understanding of the techniques used to obtain these data, will help improve the condition of cetaceans (especially endangered species) kept in captivity and fill in the gaps of studies done on cetaceans in the wild.},\n bibtype = {article},\n author = {Morisaka, Tadamichi and Kohshima, Shiro and Yoshioka, Motoi and Suzuki, Miwa and Nakahara, Fumio},\n journal = {International Journal of Comparative Psychology},\n keywords = {reviewed}\n}\n\n Recent technological advances have allowed researchers to acquire a vast amount of information on wild cetaceans, much of which had previously been inaccessible. However, despite these new technologies, existing studies on cetaceans in captivity remain valuable. In this article, we review the recent research conducted on captive cetaceans in Japan to show their importance. We indexed the existing studies regarding behavior (resting behavior, vocal development, social behavior, and behavior differences between species), comparative cognition (echolocation ability), stress reduction, and reproductive physiology. The resulting data, as well as an understanding of the techniques used to obtain these data, will help improve the condition of cetaceans (especially endangered species) kept in captivity and fill in the gaps of studies done on cetaceans in the wild.\n
\n\n\n\n \n\n \n \n \n \n \n Fine-scale analysis of synchronous breathing in wild Indo-Pacific bottlenose dolphins (Tursiops aduncus).\n \n \n \n\n\n \n Sakai, M.; Morisaka, T.; Kogi, K.; Hishii, T.; and Kohshima, S.\n\n\n \n\n\n\n Behavioural Processes, 83(1): 48-53. 2010.\n \n\n\n\n
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\n\n\n\n@article{\n title = {Fine-scale analysis of synchronous breathing in wild Indo-Pacific bottlenose dolphins (Tursiops aduncus)},\n type = {article},\n year = {2010},\n keywords = {reviewed},\n pages = {48-53},\n volume = {83},\n id = {fc302a44-8f7c-35ee-af44-05e1f8091953},\n created = {2014-04-10T00:39:53.000Z},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2017-03-22T13:23:15.952Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n bibtype = {article},\n author = {Sakai, Mai and Morisaka, Tadamichi and Kogi, Kazunobu and Hishii, Toru and Kohshima, Shiro},\n journal = {Behavioural Processes},\n number = {1}\n}\n\n \n\n \n \n \n \n \n Does affiliative body contact repair relationships among bottlenose dolphins?.\n \n \n \n\n\n \n Tamaki, N.; and Morisaka, T.\n\n\n \n\n\n\n 2010.\n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n \n \n\n bibtex\n \n\n \n \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n \n \n \n\n\n\n
\n\n\n\n\n\n \n\n\n\n \n\n \n\n \n link\n \n \n\n bibtex\n \n\n \n \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n \n \n \n\n\n\n
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\n\n\n@book{\n title = {Does affiliative body contact repair relationships among bottlenose dolphins?},\n type = {book},\n year = {2010},\n source = {Dolphins: Anatomy, Behavior and Threats},\n id = {92a6cfdc-eb69-33e5-9b51-6b9c3f6e7916},\n created = {2017-04-18T05:56:30.537Z},\n file_attached = {false},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2018-02-19T02:25:27.651Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n abstract = {Bottlenose dolphins live in social groups characterized by long-term relationships between individuals. Previous studies have reported a variety of aggressive behaviors such as chasing, head-butting, biting, etc. in both captive and wild dolphins. An affiliative body contact among dolphins may repair deteriorated relationships or reduce tension within the group following aggressive interactions and contribute to maintain the social groups, as reported for non-human primates; dolphins touch or rub the surface of other individuals. We observed three captive bottlenose dolphins (2 adult females and a young male) and investigated the time-series patterns of one type of contact behavior (flipper-rubbing) and aggression. In two dolphin pairs, flipper-rubbing occurred more frequently in 10 min following aggressive bout (post-AG periods) and latency to aggressive interactions was significantly longer when either opponent engaged in rubbing. For all three focal pairs, 'the third party' engaged in flipper-rubbing with either former opponent more frequently in post-AG bouts. Flipper-rubbing may contribute to restore friendly relationships between former opponents or reduce conflicts in dolphin associations. Our results also give preliminary suggestions of the functions of third-party flipper-rubbing among bottlenose dolphins, including tension easing by the third party, or displacement as a result of aggressive interactions. © 2010 by Nova Science Publishers, Inc. All rights reserved.},\n bibtype = {book},\n author = {Tamaki, N. and Morisaka, T.}\n}\n\n Bottlenose dolphins live in social groups characterized by long-term relationships between individuals. Previous studies have reported a variety of aggressive behaviors such as chasing, head-butting, biting, etc. in both captive and wild dolphins. An affiliative body contact among dolphins may repair deteriorated relationships or reduce tension within the group following aggressive interactions and contribute to maintain the social groups, as reported for non-human primates; dolphins touch or rub the surface of other individuals. We observed three captive bottlenose dolphins (2 adult females and a young male) and investigated the time-series patterns of one type of contact behavior (flipper-rubbing) and aggression. In two dolphin pairs, flipper-rubbing occurred more frequently in 10 min following aggressive bout (post-AG periods) and latency to aggressive interactions was significantly longer when either opponent engaged in rubbing. For all three focal pairs, 'the third party' engaged in flipper-rubbing with either former opponent more frequently in post-AG bouts. Flipper-rubbing may contribute to restore friendly relationships between former opponents or reduce conflicts in dolphin associations. Our results also give preliminary suggestions of the functions of third-party flipper-rubbing among bottlenose dolphins, including tension easing by the third party, or displacement as a result of aggressive interactions. © 2010 by Nova Science Publishers, Inc. All rights reserved.\n
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\n\n \n \n 2009\n \n \n (2)\n \n \n
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\n \n \n\n \n \n \n \n \n \n Overview of comparative cognitive studies of dolphins in Japan.\n \n \n \n \n\n\n \n Morisaka, T.\n\n\n \n\n\n\n Japanese Psychological Research, 51(3): 168-176. 2009.\n \n\n\n\n
\n\n\n\n \n \nWebsite\n \n \n\n \n \n doi\n \n \n\n \n link\n \n \n\n bibtex\n \n\n \n \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n \n \n \n \n \n\n\n\n
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\n\n\n@article{\n title = {Overview of comparative cognitive studies of dolphins in Japan},\n type = {article},\n year = {2009},\n keywords = {reviewed},\n pages = {168-176},\n volume = {51},\n websites = {http://doi.wiley.com/10.1111/j.1468-5884.2009.00395.x},\n publisher = {WILEY-BLACKWELL PUBLISHING},\n id = {247f25a0-4c2f-3ae0-84a0-ed99f624a8c9},\n created = {2014-04-10T00:39:52.000Z},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2017-03-22T13:23:15.952Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n abstract = {Dolphins live in aquatic environments that differ greatly from our terrestrial environments. Several studies have demonstrated that dolphins have complex cognitive abilities comparable to those of great apes. No comparative cognitive studies of dolphins were conducted in Japan until the mid-1990s, but several pioneering works on dolphin comparative brain studies in Japan had already implied the higher cognitive ability of dolphins by the 1940s. Research in this field is now increasing gradually. This paper provides an overview of comparative cognitive studies of dolphins conducted in Japan, in order to promote dolphin cognition studies in Japan in the future. It begins with a brief history of dolphin cognitive studies in Japan, which is followed by case studies of visual, acoustic, and social cognition, and a discussion of future studies.},\n bibtype = {article},\n author = {Morisaka, Tadamichi},\n doi = {10.1111/j.1468-5884.2009.00395.x},\n journal = {Japanese Psychological Research},\n number = {3}\n}\n\n Dolphins live in aquatic environments that differ greatly from our terrestrial environments. Several studies have demonstrated that dolphins have complex cognitive abilities comparable to those of great apes. No comparative cognitive studies of dolphins were conducted in Japan until the mid-1990s, but several pioneering works on dolphin comparative brain studies in Japan had already implied the higher cognitive ability of dolphins by the 1940s. Research in this field is now increasing gradually. This paper provides an overview of comparative cognitive studies of dolphins conducted in Japan, in order to promote dolphin cognition studies in Japan in the future. It begins with a brief history of dolphin cognitive studies in Japan, which is followed by case studies of visual, acoustic, and social cognition, and a discussion of future studies.\n
\n\n\n\n \n\n \n \n \n \n \n Cognitive tactics of Bengalese finch (Lonchura striata var. domestica) for song discrimination in a go/no-go operant task.\n \n \n \n\n\n \n Morisaka, T.; and Okanoya, K.\n\n\n \n\n\n\n Journal of Ethology, 27(1): 11-18. 2009.\n \n\n\n\n
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\n\n\n@article{\n title = {Cognitive tactics of Bengalese finch (Lonchura striata var. domestica) for song discrimination in a go/no-go operant task},\n type = {article},\n year = {2009},\n pages = {11-18},\n volume = {27},\n id = {58f6da21-e4a4-3180-820b-b73371d31f30},\n created = {2014-04-10T00:39:53.000Z},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2018-04-23T08:26:09.533Z},\n read = {true},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n abstract = {Twelve Bengalese finches (Lonchura striata var. domestica) were trained to discriminate between a conspecific and a heterospecific song in a go/no-go operant task. Training the birds to go for the conspecifics song or to go for the heterospecific song required the same number of training sessions. Nine possible cognitive tactics could be used to solve this task, but probe tests revealed that the birds used only four. Six birds memorized only the "no-go" stimulus and responded to the rest of the stimuli (no-go memory), two birds classified songs according to the species category (open-ended categorization), one bird memorized both of the training stimuli but responded by chance to the probe stimuli (rote categorization), and two birds combined open-ended and rote categorization tactics (combined categorization). These tactics were related to the number of sessions needed to reach the species-discrimination criterion. Our results suggest that investigators should consider individual cognitive tactics and the pitfalls of go/no-go discrimination when interpreting the results of operant discrimination tasks.},\n bibtype = {article},\n author = {Morisaka, Tadamichi and Okanoya, Kazuo},\n journal = {Journal of Ethology},\n number = {1},\n keywords = {reviewed}\n}\n\n Twelve Bengalese finches (Lonchura striata var. domestica) were trained to discriminate between a conspecific and a heterospecific song in a go/no-go operant task. Training the birds to go for the conspecifics song or to go for the heterospecific song required the same number of training sessions. Nine possible cognitive tactics could be used to solve this task, but probe tests revealed that the birds used only four. Six birds memorized only the \"no-go\" stimulus and responded to the rest of the stimuli (no-go memory), two birds classified songs according to the species category (open-ended categorization), one bird memorized both of the training stimuli but responded by chance to the probe stimuli (rote categorization), and two birds combined open-ended and rote categorization tactics (combined categorization). These tactics were related to the number of sessions needed to reach the species-discrimination criterion. Our results suggest that investigators should consider individual cognitive tactics and the pitfalls of go/no-go discrimination when interpreting the results of operant discrimination tasks.\n
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\n \n \n\n \n \n \n \n \n Current cognitive studies on cetaceans.\n \n \n \n\n\n \n Morisaka, T.\n\n\n \n\n\n\n Japanese Journal of Animal Psychology, 57(1): 41-51. 2007.\n \n\n\n\n
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\n\n\n@article{\n title = {Current cognitive studies on cetaceans},\n type = {article},\n year = {2007},\n pages = {41-51},\n volume = {57},\n id = {bef194a3-79fb-3092-8471-eec56b48b5a6},\n created = {2014-04-10T00:39:52.000Z},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2017-03-22T13:23:15.952Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n abstract = {Vol.57, No.1(20070625) pp. 41-51. 日本動物心理学会 ISSN:09168419. 書誌情報. on . MORISAKA TADAMICHI 1.},\n bibtype = {article},\n author = {Morisaka, Tadamichi},\n journal = {Japanese Journal of Animal Psychology},\n number = {1},\n keywords = {non-reviewed}\n}\n\n Vol.57, No.1(20070625) pp. 41-51. 日本動物心理学会 ISSN:09168419. 書誌情報. on . MORISAKA TADAMICHI 1.\n
\n\n\n\n \n\n \n \n \n \n \n Predation by killer whales (Orcinus orca) and the evolution of whistle loss and narrow-band high frequency clicks in odontocetes.\n \n \n \n\n\n \n Morisaka, T.; and Connor, R., C.\n\n\n \n\n\n\n Journal of Evolutionary Biology, 20(4): 1439-1458. 2007.\n \n\n\n\n
\n\n\n\n \n\n \n \n doi\n \n \n\n \n link\n \n \n\n bibtex\n \n\n \n \n \n abstract \n \n\n \n \n \n 1 download\n \n \n\n \n \n \n \n \n \n \n\n \n \n \n \n \n\n\n\n
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\n\n\n@article{\n title = {Predation by killer whales (Orcinus orca) and the evolution of whistle loss and narrow-band high frequency clicks in odontocetes},\n type = {article},\n year = {2007},\n pages = {1439-1458},\n volume = {20},\n institution = {Laboratory of Animal Ecology, Department of Zoology, Graduate School of Science, Kyoto University, Kyoto, Japan. morisaka@ethol.zool.kyoto-u.ac.jp},\n id = {bee86802-0529-350b-baec-cc895975b204},\n created = {2014-04-10T00:39:53.000Z},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2018-09-12T22:01:28.278Z},\n read = {true},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n folder_uuids = {7475f247-52fa-41f9-886c-9edb3f3847fc},\n private_publication = {false},\n abstract = {A disparate selection of toothed whales (Odontoceti) share striking features of their acoustic repertoires including the absence of whistles and high frequency but weak (low peak-to-peak source level) clicks that have a relatively long duration and a narrow bandwidth. The non-whistling, high frequency click species include members of the family Phocoenidae, members of one genus of delphinids, Cephalorhynchus, the pygmy sperm whale, Kogia breviceps, and apparently the sole member of the family Pontoporiidae. Our review supports the 'acoustic crypsis' hypothesis that killer whale predation risk was the primary selective factor favouring an echolocation and communication system in cephalorhynchids, phocoenids and possibly Pontoporiidae and Kogiidae restricted to sounds that killer whales hear poorly or not at all (< 2 and > 100 kHz).},\n bibtype = {article},\n author = {Morisaka, T and Connor, R C},\n doi = {10.1111/j.1420-9101.2007.01336.x},\n journal = {Journal of Evolutionary Biology},\n number = {4},\n keywords = {reviewed}\n}\n\n A disparate selection of toothed whales (Odontoceti) share striking features of their acoustic repertoires including the absence of whistles and high frequency but weak (low peak-to-peak source level) clicks that have a relatively long duration and a narrow bandwidth. The non-whistling, high frequency click species include members of the family Phocoenidae, members of one genus of delphinids, Cephalorhynchus, the pygmy sperm whale, Kogia breviceps, and apparently the sole member of the family Pontoporiidae. Our review supports the 'acoustic crypsis' hypothesis that killer whale predation risk was the primary selective factor favouring an echolocation and communication system in cephalorhynchids, phocoenids and possibly Pontoporiidae and Kogiidae restricted to sounds that killer whales hear poorly or not at all (< 2 and > 100 kHz).\n
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\n\n \n \n 2006\n \n \n (1)\n \n \n
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\n \n \n\n \n \n \n \n \n Does body contact contribute towards repairing relationships?. The association between flipper-rubbing and aggressive behavior in captive bottlenose dolphins.\n \n \n \n\n\n \n Tamaki, N.; Morisaka, T.; and Taki, M.\n\n\n \n\n\n\n Behavioural Processes, 73(2): 209-215. 2006.\n \n\n\n\n
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\n\n\n\n@article{\n title = {Does body contact contribute towards repairing relationships?. The association between flipper-rubbing and aggressive behavior in captive bottlenose dolphins},\n type = {article},\n year = {2006},\n keywords = {reviewed},\n pages = {209-215},\n volume = {73},\n id = {55230eb6-4155-300b-a51c-8d246f3b322f},\n created = {2014-04-10T00:39:52.000Z},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2017-03-22T13:23:15.952Z},\n read = {true},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n bibtype = {article},\n author = {Tamaki, Nana and Morisaka, Tadamichi and Taki, Michihiro},\n journal = {Behavioural Processes},\n number = {2}\n}\n\n
\n\n \n \n 2005\n \n \n (4)\n \n \n
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\n \n \n\n \n \n \n \n \n Underwater Sounds Produced by Neonatal Bottlenose Dolphins (Tursiops truncatus): II. Potential Function.\n \n \n \n\n\n \n Morisaka, T.; Shinohara, M.; and Taki, M.\n\n\n \n\n\n\n Aquatic Mammals, 31(2): 258-265. 2005.\n \n\n\n\n
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\n\n\n \n\n\n\n \n\n \n \n doi\n \n \n\n \n link\n \n \n\n bibtex\n \n\n \n \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n \n \n \n \n \n\n\n\n
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\n\n\n@article{\n title = {Underwater Sounds Produced by Neonatal Bottlenose Dolphins (Tursiops truncatus): II. Potential Function},\n type = {article},\n year = {2005},\n pages = {258-265},\n volume = {31},\n id = {8c96bda9-5049-383e-abdd-06ce7c1402f9},\n created = {2014-04-10T00:39:52.000Z},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2017-03-22T13:23:15.952Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n abstract = {Neonatal bottlenose dolphins (Tursiops truncatus) produce many sounds just after birth, including whistles and pulsed sounds. Herein, we report the possible function of the sounds produced by two captive-born, neonatal bottlenose dolphin as revealed by behavioural observations. Typical sucking sounds were observed during 71 to 81% of all suckling bouts. Since the neonates produced more sounds at the beginning of the suckling sequence than expected, it appeared that they might use the sounds as care-solicitation signals or begging signals. These sounds contained a higher proportion of whistles than sounds in other contexts, which implied that the proportions of sound types, especially whistles, were important for neonatal dolphins and their mothers to initiate the nursing sequence.},\n bibtype = {article},\n author = {Morisaka, Tadamichi and Shinohara, Masanori and Taki, Michihiro},\n doi = {10.1578/AM.31.2.2005.258},\n journal = {Aquatic Mammals},\n number = {2},\n keywords = {reviewed}\n}\n\n Neonatal bottlenose dolphins (Tursiops truncatus) produce many sounds just after birth, including whistles and pulsed sounds. Herein, we report the possible function of the sounds produced by two captive-born, neonatal bottlenose dolphin as revealed by behavioural observations. Typical sucking sounds were observed during 71 to 81% of all suckling bouts. Since the neonates produced more sounds at the beginning of the suckling sequence than expected, it appeared that they might use the sounds as care-solicitation signals or begging signals. These sounds contained a higher proportion of whistles than sounds in other contexts, which implied that the proportions of sound types, especially whistles, were important for neonatal dolphins and their mothers to initiate the nursing sequence.\n
\n\n\n\n \n\n \n \n \n \n \n Effects of ambient noise on the whistles of Indo-Pacific bottlenose dolphin population.\n \n \n \n\n\n \n Morisaka, T.; Shinohara, M.; Nakahara, F.; and Akamatsu, T.\n\n\n \n\n\n\n Journal of Mammalogy, 86(3): 541-546. 2005.\n \n\n\n\n
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\n\n\n@article{\n title = {Effects of ambient noise on the whistles of Indo-Pacific bottlenose dolphin population},\n type = {article},\n year = {2005},\n pages = {541-546},\n volume = {86},\n id = {0b498f11-9224-3266-bf13-5fb0509bc738},\n created = {2014-04-10T00:39:53.000Z},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2018-09-03T06:26:09.519Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n citation_key = {Morisaka2005a},\n folder_uuids = {7475f247-52fa-41f9-886c-9edb3f3847fc,7cd1dddd-cc00-4252-996a-71d1c2ea70a2},\n private_publication = {false},\n abstract = {Communication among animals should use signals that are most efficient in their particular habitat. Here, we report data from 3 populations of Indo-Pacific bottlenose dolphins (Tursiops aduncus) in Japan that produce whistles transmitted efficiently through environmental ambient noise. We compared the characteristics of the ambient noise in the dolphins' habitats and the whistles produced. In habitats with less ambient noise, dolphins produced whistles at varying frequencies with greater modulations; when ambient noise was greater, dolphins produced whistles of lower frequencies with fewer frequency modulations. Examination of our results suggests that communication signals are adaptive and are selected to avoid the masking of signals and the attenuation of higher-frequency signals. Thus, ambient noise may drive the variation in whistles of Indo-Pacific bottlenose dolphin populations.},\n bibtype = {article},\n author = {Morisaka, Tadamichi and Shinohara, Masanori and Nakahara, Fumio and Akamatsu, Tomonari},\n doi = {10.1644/1545-1542(2005)86[541:EOANOT]2.0.CO;2},\n journal = {Journal of Mammalogy},\n number = {3},\n keywords = {reviewed}\n}\n\n Communication among animals should use signals that are most efficient in their particular habitat. Here, we report data from 3 populations of Indo-Pacific bottlenose dolphins (Tursiops aduncus) in Japan that produce whistles transmitted efficiently through environmental ambient noise. We compared the characteristics of the ambient noise in the dolphins' habitats and the whistles produced. In habitats with less ambient noise, dolphins produced whistles at varying frequencies with greater modulations; when ambient noise was greater, dolphins produced whistles of lower frequencies with fewer frequency modulations. Examination of our results suggests that communication signals are adaptive and are selected to avoid the masking of signals and the attenuation of higher-frequency signals. Thus, ambient noise may drive the variation in whistles of Indo-Pacific bottlenose dolphin populations.\n
\n\n\n\n \n\n \n \n \n \n \n \n Underwater Sounds Produced by Neonatal Bottlenose Dolphins (Tursiops truncatus): I. Acoustic Characteristics.\n \n \n \n \n\n\n \n Morisaka, T.; Shinohara, M.; and Taki, M.\n\n\n \n\n\n\n Aquatic Mammals, 31(2): 248-257. 2005.\n \n\n\n\n
\n\n\n\n \n \nWebsite\n \n \n\n \n\n \n link\n \n \n\n bibtex\n \n\n \n \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n \n \n \n \n \n\n\n\n
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\n\n\n@article{\n title = {Underwater Sounds Produced by Neonatal Bottlenose Dolphins (Tursiops truncatus): I. Acoustic Characteristics},\n type = {article},\n year = {2005},\n keywords = {reviewed},\n pages = {248-257},\n volume = {31},\n websites = {http://www.ncbi.nlm.nih.gov/pubmed/19428329},\n id = {683a12c3-3ad4-3353-adc5-8c0007d8807c},\n created = {2014-04-10T00:39:53.000Z},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2017-03-22T13:23:15.952Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n abstract = {Dose-limiting side effects of centrally acting opioid drugs have led to the use of topical opioids to reduce the pain associated with chronic cutaneous wounds. However, previous studies indicate that topical morphine application impairs wound healing. This study was designed to elucidate the mechanisms by which morphine delays wound closure. Rats were depleted of sensory neuropeptides by treatment with capsaicin, and full-thickness 4-mm diameter wounds were excised from the intrascapular region. Wounds were treated topically twice daily with 5mM morphine sulfate, 1mM substance P, 1mM neurokinin A, or 5mM morphine combined with 1mM substance P or neurokinin A and wound areas assessed. During closure, wound tissue was taken 1, 3, 5, and 8 days post-wounding from control and morphine-treated rats and immunostained for neurokinin receptors and markers for macrophages, myofibroblasts, and vasculature. Results obtained from capsaicin-treated animals demonstrated a significant delay in the early stages of wound contraction that was reversed by neuropeptide application. Treatment of capsaicin-treated rats with topical morphine did not further delay wound closure, suggesting that topical opioids impair wound closure via the inhibition of peripheral neuropeptide release into the healing wound. Morphine application altered neurokinin-1 and neurokinin-2 receptor expression in inflammatory and parenchymal cells essential for wound healing in a cell-specific manner, demonstrating a direct effect of morphine on neurokinin receptor regulation within an array of cells involved in wound healing. These data provide evidence indicating a potentially detrimental effect of topical morphine application on the dynamic wound healing process.},\n bibtype = {article},\n author = {Morisaka, Tadamichi and Shinohara, Masanori and Taki, Michihiro},\n journal = {Aquatic Mammals},\n number = {2}\n}\n\n Dose-limiting side effects of centrally acting opioid drugs have led to the use of topical opioids to reduce the pain associated with chronic cutaneous wounds. However, previous studies indicate that topical morphine application impairs wound healing. This study was designed to elucidate the mechanisms by which morphine delays wound closure. Rats were depleted of sensory neuropeptides by treatment with capsaicin, and full-thickness 4-mm diameter wounds were excised from the intrascapular region. Wounds were treated topically twice daily with 5mM morphine sulfate, 1mM substance P, 1mM neurokinin A, or 5mM morphine combined with 1mM substance P or neurokinin A and wound areas assessed. During closure, wound tissue was taken 1, 3, 5, and 8 days post-wounding from control and morphine-treated rats and immunostained for neurokinin receptors and markers for macrophages, myofibroblasts, and vasculature. Results obtained from capsaicin-treated animals demonstrated a significant delay in the early stages of wound contraction that was reversed by neuropeptide application. Treatment of capsaicin-treated rats with topical morphine did not further delay wound closure, suggesting that topical opioids impair wound closure via the inhibition of peripheral neuropeptide release into the healing wound. Morphine application altered neurokinin-1 and neurokinin-2 receptor expression in inflammatory and parenchymal cells essential for wound healing in a cell-specific manner, demonstrating a direct effect of morphine on neurokinin receptor regulation within an array of cells involved in wound healing. These data provide evidence indicating a potentially detrimental effect of topical morphine application on the dynamic wound healing process.\n
\n\n\n\n \n\n \n \n \n \n \n \n Geographic variations in the whistles among three Indo-Pacific bottlenose dolphin Tursiops aduncus populations in Japan.\n \n \n \n \n\n\n \n Morisaka, T.; Shinohara, M.; Nakahara, F.; and Akamatsu, T.\n\n\n \n\n\n\n Fisheries Science, 71(3): 568-576. 2005.\n \n\n\n\n
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\n\n\n@article{\n title = {Geographic variations in the whistles among three Indo-Pacific bottlenose dolphin Tursiops aduncus populations in Japan},\n type = {article},\n year = {2005},\n pages = {568-576},\n volume = {71},\n websites = {http://dx.doi.org/10.1111/j.1444-2906.2005.01001.x},\n id = {8cfaadf9-2783-30d9-9304-78f6513a05fa},\n created = {2014-04-10T00:39:54.000Z},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2018-08-30T05:12:26.852Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n citation_key = {Morisaka2005},\n folder_uuids = {7cd1dddd-cc00-4252-996a-71d1c2ea70a2},\n private_publication = {false},\n abstract = {Whistles of Indo-Pacific bottlenose dolphins from three populations in Japan were collected and analyzed quantitatively. Geographic variations in the whistles among populations were found. Significant differences in the whistles among years within each population were also found, but those differences could not explain whole differences among populations because some parameters of the whistles had more differences among populations than among years within each population. As changes with time in the whistles within each population might cause the geographic variations among populations, researchers should take the yearly change within populations into consideration when they study the geographic variation in the whistle of dolphins.},\n bibtype = {article},\n author = {Morisaka, Tadamichi and Shinohara, Masanori and Nakahara, Fumio and Akamatsu, Tomonari},\n doi = {10.1111/j.1444-2906.2005.01001.x},\n journal = {Fisheries Science},\n number = {3},\n keywords = {reviewed}\n}\n\n Whistles of Indo-Pacific bottlenose dolphins from three populations in Japan were collected and analyzed quantitatively. Geographic variations in the whistles among populations were found. Significant differences in the whistles among years within each population were also found, but those differences could not explain whole differences among populations because some parameters of the whistles had more differences among populations than among years within each population. As changes with time in the whistles within each population might cause the geographic variations among populations, researchers should take the yearly change within populations into consideration when they study the geographic variation in the whistle of dolphins.\n
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\n\n\n\n\n \n \n 2003\n \n \n (1)\n \n \n
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\n \n \n\n \n \n \n \n \n 和歌山県白浜町番所崎の南浜にて発見されたハンドウイルカ Tursiops truncatus.\n \n \n \n\n\n \n 岸田拓士; 森阪匡通; 久保田信; and 天野雅男\n\n\n \n\n\n\n 漂着物学会誌, 1: 25-27. 2003.\n \n\n\n\n
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\n\n\n\n@article{\n title = {和歌山県白浜町番所崎の南浜にて発見されたハンドウイルカ Tursiops truncatus},\n type = {article},\n year = {2003},\n pages = {25-27},\n volume = {1},\n id = {bcb948ff-2d8f-3707-95e8-675485ef5377},\n created = {2015-07-05T05:14:23.000Z},\n file_attached = {true},\n profile_id = {3ceab90d-9e33-3fd2-83b8-ba4015da5b3d},\n last_modified = {2017-03-22T13:23:15.952Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n bibtype = {article},\n author = {岸田拓士, undefined and 森阪匡通, undefined and 久保田信, undefined and 天野雅男, undefined},\n journal = {漂着物学会誌}\n}\n