Biogeography predicts macro-evolutionary patterning of gestural display complexity in a passerine family.
Biogeography predicts macro-evolutionary patterning of gestural display complexity in a passerine family.
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DOI：
10.1111/evo.13213
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发表时间：
2017-05
期刊：
影响因子：
--
通讯作者：
Fuxjager MJ
中科院分区：
文献类型：
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作者：
Miles MC;Cheng S;Fuxjager MJ
手势展示已被纳入许多动物物种的信号系统中。这些显示范围从涉及令人印象深刻且具有挑战性的动作的复杂信号，到更简单的显示或根本没有手势。驱动这种进化的因素在很大程度上仍不清楚，因此，我们通过测试与物种地理分布和社会交配系统相关的因素如何预测展示精细化的宏观进化模式来研究新世界黑鸟的这个问题。我们报告说，生活在温带地区的物种比生活在热带地区的物种产生更复杂的表现，我们将其归因于（i）增加温带地区社会环境竞争力的生态因素，以及（ii）温带和热带地区物种进化的不同进化和地质背景。同时，我们没有发现任何证据表明社会交配系统可以预测展示复杂性的物种差异，这与手势展示独立于社会交配系统而进化的观点是一致的。总之，这些结果首次深入了解了地理因素和进化背景在鸟类和其他脊椎动物的非凡物理表现的进化过程中所发挥的作用。
Gestural displays are incorporated into the signaling repertoire of numerous animal species. These displays range from complex signals that involve impressive and challenging maneuvers, to simpler displays or no gesture at all. The factors that drive this evolution remain largely unclear, and we therefore investigate this issue in New World blackbirds by testing how factors related to a species’ geographical distribution and social mating system predict macro‐evolutionary patterns of display elaboration. We report that species inhabiting temperate regions produce more complex displays than species living in tropical regions, and we attribute this to (i) ecological factors that increase the competitiveness of the social environment in temperate regions, and (ii) different evolutionary and geological contexts under which species in temperate and tropical regions evolved. Meanwhile, we find no evidence that social mating system predicts species differences in display complexity, which is consistent with the idea that gestural displays evolve independently of social mating system. Together, these results offer some of the first insight into the role played by geographic factors and evolutionary context in the evolution of the remarkable physical displays of birds and other vertebrates.