It's not all about temperature: breeding success also affects nest design
It's not all about temperature: breeding success also affects nest design
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DOI：
10.1093/beheco/araa052
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发表时间：
2020-07-01
影响因子：
2.4
通讯作者：
Healy, Susan D.
中科院分区：
文献类型：
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作者：
Edwards, Sophie C.;Shoot, Tanya T.;Healy, Susan D.
鸟类筑巢过程中种内变异的观察性研究有很多，且实验操作单一。普遍的共识是，鸟类筑巢是对环境条件的反应，但尚不清楚这种筑巢的灵活性是否有利于繁殖。为了测试建筑灵活性和繁殖成功之间的关系，我们让圈养的斑马雀用绳子建造它们的第一个鸟巢，并在温度控制在14或30摄氏度的房间里繁殖。一旦后代羽翼丰满，我们把一半的斑马雀放回相同的温度下繁殖，而一半的斑马雀则换到另一个温度。我们给每一对都提供了绳子，让它们去建造和繁殖第二次。在它们的第一个巢穴中，在14摄氏度下筑巢的鸟儿比在30摄氏度下筑巢的鸟儿使用更多的绳子，而繁殖成功的鸟儿比不成功的鸟儿用更多的绳子筑巢。然而，当成对筑巢时，温度不再解释它们使用的绳子的数量；相反，不管环境温度如何，在第一个巢穴中成功繁殖后代的雌鸟在第二个巢穴中使用了相同数量的绳子，而在第一个巢穴中繁殖失败的雌鸟则使用了更多的绳子。之后的配对更有可能成功繁殖。因此，环境温度确实会影响到成对筑巢，但只是在没有繁殖经验的情况下。
There are numerous observational studies on intraspecific variation in avian nest building and a single experimental manipulation. The general consensus is that birds build nests in response to environmental conditions, but it is not clear whether such flexibility in nest building is reproductively advantageous. To test the relationship between building flexibility and reproductive success, we allowed captive zebra finches to build their first nest, using string, and to breed in temperature-controlled rooms held at 14 or 30 degrees C. Once the offspring had fledged, we returned half the pairs to breed at the same temperature while half the pairs were switched to the alternative temperature. We provided all pairs with string and left them to build and breed a second time. For their first nest, pairs that built at 14 degrees C used more string than did pairs that built at 30 degrees C, and pairs that bred successfully built a nest with more string than did unsuccessful pairs. When pairs built their second nest, however, temperature no longer explained the number of pieces of string they used; rather, irrespective of the ambient temperature, pairs that had successfully produced young from their first nest used the same amount of string for their second nest, whereas those that had failed to reproduce with their first nest used more string. These latter pairs were then more likely to reproduce successfully. Ambient temperature, therefore, did affect the nest the pairs built but only in the absence of reproductive experience.