The challenge hypothesis across taxa: social modulation of hormone titres in vertebrates and insects
The challenge hypothesis across taxa: social modulation of hormone titres in vertebrates and insects
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DOI：
10.1016/j.anbehav.2014.02.015
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发表时间：
2014-06
期刊：
影响因子：
2.5
通讯作者：
E. Tibbetts;Katherine C Crocker
中科院分区：
文献类型：
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作者：
E. Tibbetts;Katherine C Crocker
雄激素滴度对社会不稳定性、优势等级和交配系统的反应。昆虫缺乏雄激素，但保幼激素（JH）与雄激素有关键的相似之处。这两种激素都介导生殖力-寿命的权衡。我们综述了JH如何对社会不稳定性、优势等级和交配系统的反应。一般来说，JH的社会反应性与雄激素的反应性相似。许多动物通过利用社会信息来调节它们的激素，以适应快速变化的社会环境滴度如挑战假说所提出的，调节激素滴度提供了一种机制，通过这种机制，个人可以将其行为与当前的社会环境相匹配，从而避免与长期高激素滴度相关的成本。到目前为止，大多数关于激素滴度的社会反应性的工作都集中在脊椎动物中的雄激素上。然而，越来越多的证据表明，昆虫激素，特别是保幼激素，可能会对社会刺激的方式平行的脊椎动物的雄激素。这项评论将整合脊椎动物和昆虫激素滴度的社会调节工作。首先，我们回顾如何在生殖力和寿命之间的平衡可能是一个关键的选择力，有利于社会反应激素滴度在这两个系统。然后，我们回顾了脊椎动物和昆虫的理论和实证工作，解决社会不稳定性，优势等级和交配系统等因素如何影响激素滴度反应。这些研究表明：（1）保幼激素（JH）在一系列昆虫类群中对社会刺激有反应;（2）保幼激素的反应与挑战假说的关键预测相符。我们的结论是，有很强的相似性，在脊椎动物和昆虫类群的内分泌反应。挑战假说为昆虫内分泌学的假说驱动研究提供了一个有用的概念框架。此外，探索脊椎动物和昆虫之间的趋同和分歧领域可能有助于澄清选择如何塑造内分泌反应模式。
HighlightsAndrogen titres respond to social instability, dominance rank and mating system.Insects lack androgens, but juvenile hormone (JH) has key parallels with androgens.Both hormones mediate the fecundity–life span trade-off.We review how JH responds to social instability, dominance rank and mating system.In general, social responsiveness of JH parallels that of androgens.Many animals adapt to rapidly changing social environments by using social information to modulate their hormone titres. Modulation of hormone titres, as proposed by the challenge hypothesis, provides a mechanism by which individuals can match their behaviour to their current social environment and thereby avoid costs associated with prolonged high hormone titres. Thus far, most work on social responsiveness of hormone titres has focused on androgens in vertebrates. However, there is mounting evidence that insect hormones, especially juvenile hormone, may respond to social stimuli in ways that parallel androgens in vertebrates. This review will integrate work on social modulation of hormone titres in vertebrates and insects. First we review how the hormone-mediated trade-off between fecundity and life span may be a key selective force favouring socially responsive hormone titres in both systems. Then we review theoretical and empirical work in vertebrates and insects that address how factors such as social instability, dominance rank and mating system influence hormone titre responsiveness. These studies illustrate that (1) juvenile hormone (JH) is responsive to social stimuli in a range of insect taxa and (2) JH responses match key predictions of the challenge hypothesis. We conclude that there are strong similarities in endocrine responsiveness across vertebrate and insect taxa. The challenge hypothesis provides a useful conceptual framework for hypothesis-driven research in insect endocrinology. In addition, exploring areas of convergence and divergence across vertebrates and insects may help clarify how selection has shaped patterns of endocrine responsiveness.