Survival of Female Harlequin Ducks During Wing Molt. Iverson, S., a. & Esler, D. Journal of Wildlife Management, 71(4):1220-1224, 2007.
Survival of Female Harlequin Ducks During Wing Molt [link]Website  abstract   bibtex   
Survival rates of waterfowl during wing molt have rarely been described, leading to uncertainty about the importance of this annual cycle stage for management. We quantified survival probability of 247 radiomarked female harlequin ducks (Histrionicus histrionicus) during wing molt in Prince William Sound, Alaska, USA. The daily survival rate (DSR) was extremely high (DSR = 0.999; 95% CI: 0.994-1.000) during the 37-day interval over which remiges were replaced and individuals were rendered flightless. Our DSR estimate corresponded to a cumulative survival probability of 0.99 (95% CI: 0.81-1.00) for the 20 August-15 October postbreeding period as a whole, which is appreciably higher than estimates that have been derived for breeding or overwintering stages. We conclude that wing molt is a comparatively safe stage of the annual cycle for harlequin ducks that does not constrain population growth rate, with the implication for wildlife managers being that, in the absence of anthropogenic influences, management prescriptions may be most effective when focused on other stages of the annual cycle. [ABSTRACT FROM AUTHOR] Copyright of Journal of Wildlife Management is the property of Allen Press Publishing Services Inc. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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 title = {Survival of Female Harlequin Ducks During Wing Molt},
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 year = {2007},
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 keywords = {ALASKA,ANIMAL populations,HARLEQUIN duck,Histrionicus histrionicus,PRINCE William Sound (Alaska),Prince William Sound,WATERFOWL,WILDLIFE management,demography,radiotelemetry,survival,wing molt},
 pages = {1220-1224},
 volume = {71},
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 abstract = {Survival rates of waterfowl during wing molt have rarely been described, leading to uncertainty about the importance of this annual cycle stage for management. We quantified survival probability of 247 radiomarked female harlequin ducks (Histrionicus histrionicus) during wing molt in Prince William Sound, Alaska, USA. The daily survival rate (DSR) was extremely high (DSR = 0.999; 95% CI: 0.994-1.000) during the 37-day interval over which remiges were replaced and individuals were rendered flightless. Our DSR estimate corresponded to a cumulative survival probability of 0.99 (95% CI: 0.81-1.00) for the 20 August-15 October postbreeding period as a whole, which is appreciably higher than estimates that have been derived for breeding or overwintering stages. We conclude that wing molt is a comparatively safe stage of the annual cycle for harlequin ducks that does not constrain population growth rate, with the implication for wildlife managers being that, in the absence of anthropogenic influences, management prescriptions may be most effective when focused on other stages of the annual cycle. [ABSTRACT FROM AUTHOR] Copyright of Journal of Wildlife Management is the property of Allen Press Publishing Services Inc. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)},
 bibtype = {article},
 author = {Iverson, Samuel a and Esler, Daniel},
 journal = {Journal of Wildlife Management},
 number = {4}
}

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