The glucocorticoid stress response in Magellanic Penguins ( Spheniscus magellanicus ): comparing within and between breeding seasons, by age and colony, after fighting, and with other penguin species
Comparing baseline and stress-induced glucocorticoid hormone levels in animals is a popular tool to assess differences in stress experienced among groups. We compare corticosterone levels in Magellanic Penguins (Spheniscus magellanicus (J.R. Forster, 1781)) in situations where we hypothesize differe...
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Online Access: | http://dx.doi.org/10.1139/cjz-2014-0216 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjz-2014-0216 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjz-2014-0216 |
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crcansciencepubl:10.1139/cjz-2014-0216 2023-12-17T10:49:18+01:00 The glucocorticoid stress response in Magellanic Penguins ( Spheniscus magellanicus ): comparing within and between breeding seasons, by age and colony, after fighting, and with other penguin species Walker, Brian G. Boersma, P. Dee Wingfield, John C. 2015 http://dx.doi.org/10.1139/cjz-2014-0216 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjz-2014-0216 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjz-2014-0216 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 93, issue 2, page 123-131 ISSN 0008-4301 1480-3283 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 2015 crcansciencepubl https://doi.org/10.1139/cjz-2014-0216 2023-11-19T13:39:30Z Comparing baseline and stress-induced glucocorticoid hormone levels in animals is a popular tool to assess differences in stress experienced among groups. We compare corticosterone levels in Magellanic Penguins (Spheniscus magellanicus (J.R. Forster, 1781)) in situations where we hypothesize differences in stress patterns may exist. We compared penguins both within and between breeding seasons, birds breeding at two different locations, penguins at three different ages, penguins that had shown evidence of recent fighting, and, finally, how stress patterns differed for four different penguin species. Throughout a breeding season (settlement, incubation, and chick-rearing), we found no differences in either baseline or stress-induced hormone concentrations. Chick, juvenile, and adult penguins did not differ in baseline corticosterone levels, but juveniles had a reduced stress response. Penguins in one season showed a stress response to capture, likely due to a recent severe weather event. We found no differences in baseline or stress-induced hormone titers for birds from two different breeding locations. Evidence of recent fighting also did not alter baseline corticosterone levels. Finally, among four species of penguins measured (Magellanic, Humboldt (Spheniscus humboldti Meyen, 1834), Galápagos (Spheniscus mendiculus Sundevall, 1871), and Rockhopper (Eudyptes chrysocome (J.R. Forster, 1781)), baseline levels were always consistent, while stress-induced levels were significantly higher in the Rockhopper Penguin only. Article in Journal/Newspaper Rockhopper penguin Canadian Science Publishing (via Crossref) Canadian Journal of Zoology 93 2 123 131 |
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Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
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crcansciencepubl |
language |
English |
topic |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics Walker, Brian G. Boersma, P. Dee Wingfield, John C. The glucocorticoid stress response in Magellanic Penguins ( Spheniscus magellanicus ): comparing within and between breeding seasons, by age and colony, after fighting, and with other penguin species |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
Comparing baseline and stress-induced glucocorticoid hormone levels in animals is a popular tool to assess differences in stress experienced among groups. We compare corticosterone levels in Magellanic Penguins (Spheniscus magellanicus (J.R. Forster, 1781)) in situations where we hypothesize differences in stress patterns may exist. We compared penguins both within and between breeding seasons, birds breeding at two different locations, penguins at three different ages, penguins that had shown evidence of recent fighting, and, finally, how stress patterns differed for four different penguin species. Throughout a breeding season (settlement, incubation, and chick-rearing), we found no differences in either baseline or stress-induced hormone concentrations. Chick, juvenile, and adult penguins did not differ in baseline corticosterone levels, but juveniles had a reduced stress response. Penguins in one season showed a stress response to capture, likely due to a recent severe weather event. We found no differences in baseline or stress-induced hormone titers for birds from two different breeding locations. Evidence of recent fighting also did not alter baseline corticosterone levels. Finally, among four species of penguins measured (Magellanic, Humboldt (Spheniscus humboldti Meyen, 1834), Galápagos (Spheniscus mendiculus Sundevall, 1871), and Rockhopper (Eudyptes chrysocome (J.R. Forster, 1781)), baseline levels were always consistent, while stress-induced levels were significantly higher in the Rockhopper Penguin only. |
format |
Article in Journal/Newspaper |
author |
Walker, Brian G. Boersma, P. Dee Wingfield, John C. |
author_facet |
Walker, Brian G. Boersma, P. Dee Wingfield, John C. |
author_sort |
Walker, Brian G. |
title |
The glucocorticoid stress response in Magellanic Penguins ( Spheniscus magellanicus ): comparing within and between breeding seasons, by age and colony, after fighting, and with other penguin species |
title_short |
The glucocorticoid stress response in Magellanic Penguins ( Spheniscus magellanicus ): comparing within and between breeding seasons, by age and colony, after fighting, and with other penguin species |
title_full |
The glucocorticoid stress response in Magellanic Penguins ( Spheniscus magellanicus ): comparing within and between breeding seasons, by age and colony, after fighting, and with other penguin species |
title_fullStr |
The glucocorticoid stress response in Magellanic Penguins ( Spheniscus magellanicus ): comparing within and between breeding seasons, by age and colony, after fighting, and with other penguin species |
title_full_unstemmed |
The glucocorticoid stress response in Magellanic Penguins ( Spheniscus magellanicus ): comparing within and between breeding seasons, by age and colony, after fighting, and with other penguin species |
title_sort |
glucocorticoid stress response in magellanic penguins ( spheniscus magellanicus ): comparing within and between breeding seasons, by age and colony, after fighting, and with other penguin species |
publisher |
Canadian Science Publishing |
publishDate |
2015 |
url |
http://dx.doi.org/10.1139/cjz-2014-0216 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjz-2014-0216 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjz-2014-0216 |
genre |
Rockhopper penguin |
genre_facet |
Rockhopper penguin |
op_source |
Canadian Journal of Zoology volume 93, issue 2, page 123-131 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjz-2014-0216 |
container_title |
Canadian Journal of Zoology |
container_volume |
93 |
container_issue |
2 |
container_start_page |
123 |
op_container_end_page |
131 |
_version_ |
1785573701702385664 |