Incubation temperature impacts nestling growth and survival in an open‐cup nesting passerine
Incubation temperature impacts nestling growth and survival in an open‐cup nesting passerine
复制标题
孵化温度影响开杯筑巢雀形目雏鸟的生长和存活
作者：
Emilie A Ospina;L. Merrill;T. J. Benson
摘要对于鸟类等卵生物种来说，在蛋中经历的条件可能会对个体产生长期的影响。然而，孵化温度的细微变化对雏鸟发育的影响仍然知之甚少，特别是对于具有极小幼鸟的开杯筑巢物种。为了研究孵化温度如何影响这些物种的雏鸟发育和存活，我们在36.1℃(低处理)和37.8℃(高处理)下人工孵化了美洲知更鸟(Turdus Migratorius)的卵。孵化后，将雏鸡寄养到同龄雏鸟，并在孵化后第7天和第10天，随机选择一只自然孵化的雏鸟作为寄养伙伴，测量其质量、足踝和翼长。我们发现孵化温度对孵化持续时间、生长和存活有显著的影响，其中实验孵化的雏鸟的孵化期较短(高、低和自然蛋分别为10.22、11.50和11.95天)，低处理的雏鸟比高和自然蛋的雏鸟更小，成活率降低。这些结果强调了胚胎发育过程中孵化条件对孵化持续时间、体细胞发育和存活的重要性。此外，这些发现表明，在自然变异范围内孵化温度的差异可以对具有超常幼体的物种的生长和存活产生重要的影响。
Abstract For oviparous species such as birds, conditions experienced while in the egg can have long‐lasting effects on the individual. The impact of subtle changes in incubation temperature on nestling development, however, remains poorly understood, especially for open‐cup nesting species with altricial young. To investigate how incubation temperature affects nestling development and survival in such species, we artificially incubated American robin (Turdus migratorius) eggs at 36.1°C (“Low” treatment) and 37.8°C (“High” treatment). Chicks were fostered to same‐age nests upon hatching, and we measured mass, tarsus, and wing length of experimental nestlings and one randomly selected, naturally incubated (“Natural”), foster nest‐mate on days 7 and 10 posthatch. We found significant effects of incubation temperature on incubation duration, growth, and survival, in which experimentally incubated nestlings had shorter incubation periods (10.22, 11.50, and 11.95 days for High, Low, and Natural eggs, respectively), and nestlings from the Low treatment were smaller and had reduced survival compared to High and Natural nestlings. These results highlight the importance of incubation conditions during embryonic development for incubation duration, somatic development, and survival. Moreover, these findings indicate that differences in incubation temperature within the natural range of variation can have important carryover effects on growth and survival in species with altricial young.
影响因子：
5.2
作者：
Martin, Thomas E.;Boyce, Andy J.;Bin Soudi, Evertius E.
通讯作者：
Bin Soudi, Evertius E.