Survival Analysis of Eggs and Chicks of AdÉlie Penguins (Pygoscelis adeliae)
Survival Analysis of Eggs and Chicks of AdÉlie Penguins (Pygoscelis adeliae)
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阿德埃利企鹅 (Pygoscelis adeliae) 卵和雏鸟的生存分析
DOI：
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发表时间：
1986
期刊：
影响因子：
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通讯作者：
F. T. McCaffrey
中科院分区：
文献类型：
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作者：
L. Davis;F. T. McCaffrey
- 生存分析用于检查南极洲伯德角的六个阿德利企鹅 (Pygoscelis adeliae) 群体的卵的命运。孵化成功率为 56.2%，雏鸟雏鸟成功率为 63.3%，总体繁殖成功率为 35.6%。蛋和雏鸡损失的主要原因是南极贼鸥 (Catharacta maccormicki) 的捕食。鸡蛋和雏鸡死亡的第二重要原因分别是遗弃和饥饿，这两者都是由于巢穴救援时机不当造成的。在整个孵化期间，蛋都面临着贼鸥捕食的风险，而雏鸟则在孵化后的前 30 天面临着被贼鸥捕食的风险。鸡蛋孵化16天后，遗弃的可能性增加，并在22-24天达到峰值。饥饿发生在保卫期，最有可能发生在雏鸡6-8日龄时。繁殖时间和窝数是影响孵化初期蛋存活率的因素。从产蛋到保卫阶段结束，巢穴的位置对鸡蛋和雏鸡的存活有显着影响。产在 2 个蛋窝和中央巢中的蛋最有可能生出长出羽毛的雏鸟。 1985年4月17日收稿，已接受
-Survival analysis was used to examine the fates of eggs in six colonies of Adelie Penguins (Pygoscelis adeliae) at Cape Bird, Antarctica. Hatching success was 56.2% and fledging success for chicks was 63.3%, giving an overall reproductive success of 35.6%. The major cause of losses of both eggs and chicks was predation by South Polar Skuas (Catharacta maccormicki). The second-most important causes of egg and chick mortality were desertion and starvation, respectively, both of which resulted from inadequate timing of nest relief. Eggs were at risk of predation by skuas throughout the incubation period, while chicks were at risk for the first 30 days after hatching. The likelihood of desertion increased after the eggs had been incubated for 16 days and reached a peak at 22-24 days. Starvation occurred during the guard stage and was most likely to occur when chicks were 6-8 days old. Timing of breeding and clutch size were factors that influenced the survival of eggs through the initial stage of incubation. Nest location had a significant effect on the survival of eggs and chicks, from laying through the end of the guard stage. Eggs laid in 2-egg clutches and in central nests were most likely to produce chicks that fledged. Received 17 April 1985, accepted