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首页> 外文期刊>Canadian Journal of Zoology >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
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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

机译：麦哲伦企鹅（Spheniscus magellanicus）中糖皮质激素的应激反应：按年龄和菌落，战后以及与其他企鹅物种比较在繁殖季节内和繁殖季节之间

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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 nodifferences 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), Galapagos (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.
机译：比较基线和动物诱发的糖皮质激素水平是评估人群间压力差异的常用工具。在假设压力模式可能存在差异的情况下，我们比较了麦哲伦企鹅（Spheniscus magellanicus（J.R. Forster，1781））中的皮质酮水平。我们比较了繁殖季节内和繁殖季节之间的企鹅，在两个不同位置繁殖的鸟类，在三个不同年龄的企鹅，显示最近战斗迹象的企鹅，以及最后，四种不同企鹅物种的应激模式有何不同。在整个繁殖季节（定居，孵化和雏鸡饲养）中，我们发现基线或应激诱导的激素浓度均无差异。小鸡，少年和成年企鹅的基线皮质酮水平没有差异，但少年的应激反应降低。在一个季节中，企鹅表现出对捕获的压力反应，这可能是由于最近的恶劣天气事件造成的。我们发现来自两个不同繁殖地点的鸟类的基线或应激诱导的激素效价没有差异。最近打架的证据也没有改变基线皮质酮水平。最后，在测量的四种企鹅中（麦哲伦，洪堡（Spheniscus humboldti Meyen，1834年），加拉帕戈斯群岛（Spheniscus mendiculus Sundevall，1871年）和Rockhopper（Eudyptes chrysocome（JR Forster，1781年）），基线水平始终保持一致，而压力-仅在Rockhopper Penguin中，诱导的水平显着较高。

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