Then versus now: effect of developmental and current environmental conditions on incubation effort in birds
Then versus now: effect of developmental and current environmental conditions on incubation effort in birds
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过去与现在：发育和当前环境条件对鸟类孵化努力的影响
DOI：
10.1093/beheco/arq090
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发表时间：
2010
影响因子：
2.4
通讯作者：
Spencer K
中科院分区：
文献类型：
--
作者：
Spencer K
发育条件在形成成体表型中的作用一直是最近大量工作的焦点。然而，早期生活压力对繁殖性能的影响研究很少，特别是在鸟类物种。此外，虽然有大量的证据表明，当时的环境条件与繁殖行为的变化有关，但很少有工作调查过去和当前暴露于环境压力之间的相互作用，以确定繁殖成功。在这项研究中，我们研究了早期暴露于应激激素水平升高（皮质酮，CORT）在孵化过程中的父母的行为在男性和女性斑胸草雀（Taeniopygia guttata）繁殖在压力和非压力条件下作为成年人的影响。我们发现，雌性鸟类喂养CORT在产后发育表现出减少孵化努力下，这两个繁殖条件。有没有影响的发展CORT暴露对男性孵化的努力，然而，在不可预测的饲养条件下繁殖的男性显着降低了他们的努力水平与对照组男性相比。我们的实验处理对孵化成功率或孵化期的长度没有影响。这可能是由于部分补偿的女性与男性配对，减少了努力。我们的研究结果清楚地表明，性别特异性反应的发育和成人的环境条件下的孵化行为，而在这个圈养种群的健身成本似乎得到改善，鸟类繁殖在一个不太良性的环境中，在野外可能会面临更高的成本对当前或未来的繁殖下游的影响。
The role of developmental conditions in shaping adult phenotypes has been the focus of a great deal of recent work. However, the effects of early life stress on reproductive performance have been little studied, particularly in avian species. In addition, although there is a large body of evidence to suggest that prevailing environmental conditions are linked to changes in breeding behavior, very little work has investigated the interaction between past and current exposure to environmental stress in determining breeding success. In this study, we examined the effects of early exposure to elevated stress hormone levels (corticosterone, CORT) on parental behavior during incubation in male and female zebra finches (Taeniopygia guttata) breeding in both stressful and nonstressful conditions as adults. We found that female birds fed CORT during postnatal development exhibited reduced incubation effort under both breeding conditions. There were no effects of developmental CORT exposure on male incubation effort; however, males breeding in unpredictable feeding conditions significantly reduced their effort levels compared with control males. There were no effects of either of our experimental treatments on hatching success or length of the incubation period. This may have been due to partial compensation by females paired with males that reduced effort. Our results clearly demonstrate sex-specific responses to developmental and adult environmental conditions in terms of incubation behavior and while in this captive population fitness costs appear to be ameliorated, birds breeding in a less benign environment in the wild may face higher costs having downstream effects on current or future reproduction.
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