Changes in Cortisol Dynamics in Wild and Hatchery-Reared Juvenile Coho Salmon (Oncorhynchus kisutch) During Smoltification. Shrimpton, J. M., Bernier, N. J., & Randall, D. J. Canadian Journal of Fisheries and Aquatic Sciences, 51(10):2179–2187, October, 1994. ![Changes in Cortisol Dynamics in Wild and Hatchery-Reared Juvenile Coho Salmon (Oncorhynchus kisutch) During Smoltification [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex Cortisol dynamics were examined in hatchery and wild juvenile coho salmon (Oncorhynchus kisutch) over the spring of 1991 and 1992 when the fish were smolting. Wild fish were caught in the upper Quinsam River, British Columbia and at the downstream enumeration fence when they started to migrate. Two groups of hatchery fish were from the top and bottom ends of an earthen rearing channel. Plasma cortisol levels increased during the spring in all groups, but were significantly greater in wild than in hatchery smolts. The half-life of plasma cortisol decreased as fish smolted; however, there was no difference among the groups. Corticosteroid receptor (CR) concentration and affinity decreased during the spring. Wild fish consistently possessed the greatest gill concentration of CR. The change in dissociation constant (kD) was similar for hatchery and wild fish during spring 1991. In 1992, hatchery fish showed a similar gradual increase. In contrast, wild fish did not show an increase in kD until May. The change..., Au cours des printemps 1991 et 1992, au moment de la smoltification, la dynamique du cortisol a été examinée chez des juvéniles d'élevage et à l'état sauvage du saumon coho (Oncorhynchus kisutch). Les sujets à l'état sauvage ont été capturés dans la partie amont de la rivière Quinsam, Colombie-Britannique, ainsi qu'à la barrière de dénombrement en aval lors du commencement de la migration. Deux groupes de poissons d'élevage, provenant des deux extrémités d'un bassin d'alevinage en terre, ont été étudiés. La concentration en cortisol plasmatique s'est accrue au printemps chez tous les groupes, mais elle était significativement supérieure chez les saumoneaux à l'état sauvage par rapport aux sujets d'élevage. La demivie du cortisol plasmatique s'est abaissée lorsque les poissons sont passés par le stade de la smoltification; il n'y avait cependant pas de différence entre les groupes. La concentration en récepteurs de corticostéroïdes (CR) et leur affinité ont diminué pendant le printemps. Les poissons à l'ét...
@article{shrimpton_changes_1994,
title = {Changes in {Cortisol} {Dynamics} in {Wild} and {Hatchery}-{Reared} {Juvenile} {Coho} {Salmon} ({Oncorhynchus} kisutch) {During} {Smoltification}},
volume = {51},
issn = {0706-652X},
url = {http://www.nrcresearchpress.com/doi/abs/10.1139/f94-219},
doi = {10.1139/f94-219},
abstract = {Cortisol dynamics were examined in hatchery and wild juvenile coho salmon (Oncorhynchus kisutch) over the spring of 1991 and 1992 when the fish were smolting. Wild fish were caught in the upper Quinsam River, British Columbia and at the downstream enumeration fence when they started to migrate. Two groups of hatchery fish were from the top and bottom ends of an earthen rearing channel. Plasma cortisol levels increased during the spring in all groups, but were significantly greater in wild than in hatchery smolts. The half-life of plasma cortisol decreased as fish smolted; however, there was no difference among the groups. Corticosteroid receptor (CR) concentration and affinity decreased during the spring. Wild fish consistently possessed the greatest gill concentration of CR. The change in dissociation constant (kD) was similar for hatchery and wild fish during spring 1991. In 1992, hatchery fish showed a similar gradual increase. In contrast, wild fish did not show an increase in kD until May. The change..., Au cours des printemps 1991 et 1992, au moment de la smoltification, la dynamique du cortisol a été examinée chez des juvéniles d'élevage et à l'état sauvage du saumon coho (Oncorhynchus kisutch). Les sujets à l'état sauvage ont été capturés dans la partie amont de la rivière Quinsam, Colombie-Britannique, ainsi qu'à la barrière de dénombrement en aval lors du commencement de la migration. Deux groupes de poissons d'élevage, provenant des deux extrémités d'un bassin d'alevinage en terre, ont été étudiés. La concentration en cortisol plasmatique s'est accrue au printemps chez tous les groupes, mais elle était significativement supérieure chez les saumoneaux à l'état sauvage par rapport aux sujets d'élevage. La demivie du cortisol plasmatique s'est abaissée lorsque les poissons sont passés par le stade de la smoltification; il n'y avait cependant pas de différence entre les groupes. La concentration en récepteurs de corticostéroïdes (CR) et leur affinité ont diminué pendant le printemps. Les poissons à l'ét...},
number = {10},
urldate = {2015-07-30},
journal = {Canadian Journal of Fisheries and Aquatic Sciences},
author = {Shrimpton, J. Mark and Bernier, Nicholas J. and Randall, David J.},
month = oct,
year = {1994},
keywords = {Oncorhynchus kisutch},
pages = {2179--2187},
}
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Wild fish were caught in the upper Quinsam River, British Columbia and at the downstream enumeration fence when they started to migrate. Two groups of hatchery fish were from the top and bottom ends of an earthen rearing channel. Plasma cortisol levels increased during the spring in all groups, but were significantly greater in wild than in hatchery smolts. The half-life of plasma cortisol decreased as fish smolted; however, there was no difference among the groups. Corticosteroid receptor (CR) concentration and affinity decreased during the spring. Wild fish consistently possessed the greatest gill concentration of CR. The change in dissociation constant (kD) was similar for hatchery and wild fish during spring 1991. In 1992, hatchery fish showed a similar gradual increase. In contrast, wild fish did not show an increase in kD until May. The change..., Au cours des printemps 1991 et 1992, au moment de la smoltification, la dynamique du cortisol a été examinée chez des juvéniles d'élevage et à l'état sauvage du saumon coho (Oncorhynchus kisutch). Les sujets à l'état sauvage ont été capturés dans la partie amont de la rivière Quinsam, Colombie-Britannique, ainsi qu'à la barrière de dénombrement en aval lors du commencement de la migration. Deux groupes de poissons d'élevage, provenant des deux extrémités d'un bassin d'alevinage en terre, ont été étudiés. La concentration en cortisol plasmatique s'est accrue au printemps chez tous les groupes, mais elle était significativement supérieure chez les saumoneaux à l'état sauvage par rapport aux sujets d'élevage. La demivie du cortisol plasmatique s'est abaissée lorsque les poissons sont passés par le stade de la smoltification; il n'y avait cependant pas de différence entre les groupes. 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