Faster growth and larger size at crèche onset are associated with higher offspring survival in Adélie Penguins
Faster growth and larger size at crèche onset are associated with higher offspring survival in Adélie Penguins
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阿德利企鹅出生时生长速度更快、体型更大与后代存活率更高有关
DOI：
10.1093/ornithology/ukad006
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发表时间：
2023
期刊：
影响因子：
2.3
通讯作者：
Ainley, David G.
中科院分区：
文献类型：
--
作者：
Jennings, Scott;Dugger, Katie M.;Ballard, Grant;Ainley, David G.
我们进行了第一次评估的adsamlie企鹅（Pygoscelis adelae）雏鸟的生存，说明不完美的重新安置。我们发现，当雏鸟进入crche阶段（父母双方同时觅食，雏鸟相对不受保护的时期）时，雏鸟的体型较大，它们存活到羽化的概率更高。我们研究了一个典型年份和一个食物供应减少年份的生长、产卵时间和雏鸟存活率之间的关系。在这个季节孵得更早的雏鸟进入cr<e:1>阶段的年龄更大，而生长得更快、cr<e:1>年龄更大的雏鸟进入cr<e:1>阶段的体型更大。在粮食供应减少的年份，这些关系更为密切。因此，如果父母提供足够的食物以加快雏鸟的生长速度和/或延长护雏期，就会增加雏鸟羽化的机会。早期筑巢（即早期孵化）为父母提供了延长警戒期和提高雏鸟存活率的机会。然而，为了成功地延长警戒期，它们必须提供更多的食物并保持较高的雏鸟生长速度，即使一次只有一只父母觅食，但之前的研究表明，这对所有个体都是不可能的。研究表明，控制企鹅父母在哺育幼雏行为中权衡取舍的因素可能会随着环境条件的变化而变化，从而更好地理解物种对环境变化的适应。
We conducted the first assessment of Adélie Penguin (Pygoscelis adeliae) chick survival that accounts for imperfect resighting. We found that when chicks are larger in size when they enter the crèche stage (the period when both parents forage at the same time and chicks are left relatively unprotected), they have a higher probability of survival to fledging. We investigated the relationships between growth, crèche timing, and chick survival during one typical year and one year of reduced food availability. Chicks that hatched earlier in the season entered the crèche stage older, and chicks that both grew faster and crèched older entered the crèche at a larger size. These relationships were stronger in the year of reduced food availability. Thus, parents increased their chicks’ chance of fledging if they provided sufficient food for faster growth rates and/or extended the length of the brood-guarding period. Early nest initiation (i.e., early hatching) provided parents with the opportunity to extend the guard period and increase chick survival. However, to extend the guard stage successfully, they must provide larger meals and maintain higher chick growth rates, even if just one parent at a time is foraging, which previous work has shown is not possible for all individuals. We show that the factors governing tradeoffs in chick-rearing behavior of Adélie Penguin parents may vary in accord with environmental conditions, a result from which we can better understand species’ adaptations to environmental changes.
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阿德埃利企鹅 (Pygoscelis adeliae) 卵和雏鸟的生存分析
DOI：
--
发表时间：
1986
期刊：
影响因子：
--
作者：
L. Davis;F. T. McCaffrey
通讯作者：
F. T. McCaffrey
育儿期间工作量的个体差异：我们能否检测生殖质量或成本的生理特征？
影响因子：
1.3
作者：
T. Williams;M. Fowler
通讯作者：
M. Fowler
阿德利企鹅觅食效率与年龄相关的改善的证据
影响因子：
4.6
作者：
A. Lescroël;G. Ballard;M. Massaro;Katie M. Dugger;S. Jennings;A. Pollard;E. Porzig;Annie E. Schmidt;A. Varsani;D. Grémillet;D. Ainley
通讯作者：
D. Ainley
影响因子：
5.8
作者：
Aaron M. Christ
通讯作者：
Aaron M. Christ
影响因子：
2.5
作者：
Chapman, Erik W.;Hofmann, Eileen E.;Fraser, William R.
通讯作者：
Fraser, William R.