High temperatures reduce song production and alter signal salience in songbirds
High temperatures reduce song production and alter signal salience in songbirds
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DOI：
10.1016/j.anbehav.2021.07.020
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发表时间：
2021-08-31
期刊：
影响因子：
2.5
通讯作者：
Derryberry, E. P.
中科院分区：
文献类型：
--
作者：
Coomes, C. M.;Derryberry, E. P.
全球气候变化正在导致热浪的数量、长度和强度增加。当交配行为受到影响时，这些极端温度会降低适应性。对于许多生物体来说，一个重要的交配行为是性信号。例如，斑胸草雀、Taeniopyggia guttata 等鸣禽利用鸣声来吸引异性。在这里，我们测试了极端炎热的急性期如何影响雄性斑胸草雀的鸣叫。然后我们询问雌性斑胸草雀是否会区分不同温度下发出的歌曲。我们发现，在引起散热行为的温度下，雄性会显着减少歌曲输出。我们还发现，当受到热量挑战时，雄性会发出较短音节的歌曲。此外，歌曲的相对声学和结构一致性随着温度的变化而变化。最后，我们发现雌性斑胸草雀能够区分不同温度下发出的歌曲，并且区分的强度与音节持续时间的变化有关。总而言之，我们证明了类似热浪的条件可以通过改变信号员行为和信号本身来影响通信。我们还讨论了鸣叫减少和其他生理衰退对自由生活的斑胸草雀健康的潜在复合影响，这些斑胸草雀越来越多地经历这些高温。 (c) 2021 年动物行为研究协会。由爱思唯尔有限公司出版。保留所有权利。
Global climate change is causing heatwaves to increase in number, length and intensity. These extreme temperatures can reduce fitness when mating behaviours are affected. An important mating behaviour for many organisms is sexual signalling. For example, songbirds, such as the zebra finch, Taeniopyggia guttata, use song to attract mates. Here, we test how an acute period of extreme heat affects song production in male zebra finches. We then ask whether female zebra finches discriminate between songs produced at different temperatures. We find that males significantly reduce song output at temperatures that induce heat dissipation behaviours. We also find that males produce song bouts with shorter syllables when thermally challenged. Furthermore, the relative acoustic and structural consistency of songs changes with temperature. Finally, we find that female zebra finches discriminate between songs produced at different temperatures, and the strength of discrimination is associated with changes in syllable duration. Altogether, we demonstrate that heatwave-like conditions can impact communication via alterations in signaller behaviour and the signal itself. We also discuss the potential compounding effects of reduced song production and other physiological declines on fitness in free-living zebra finches, which increasingly experience these high temperatures. (c) 2021 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.