Song divergence and male dispersal among bird populations: a spatially explicit model testing the role of vocal learning
Song divergence and male dispersal among bird populations: a spatially explicit model testing the role of vocal learning
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DOI：
10.1006/anbe.2003.2081
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发表时间：
2003-04-01
期刊：
影响因子：
2.5
通讯作者：
Slabbekoorn, H
中科院分区：
文献类型：
--
作者：
Ellers, J;Slabbekoorn, H
鸟类鸣唱在性选择中的重要性以及鸣唱中广泛存在的地理变异提出了这样一个问题：方言是否能够促进新的、生殖隔离的亚群的进化。然而，歌曲学习对歌曲分歧和基因流之间的关系的影响仍然知之甚少。我们探讨了起源和维护的歌曲分歧和其后果男性种群之间的扩散。要做到这一点，我们使用了一个空间显式模型来研究的影响，声乐学习模式（predispersion和postdispersion）和男性之间的性内选择的作用。在模型中模拟的大多数情况下，导致显着的遗传和表型的歌曲分歧，与自然种群中方言的广泛发生一致。雄性排斥形式的性内选择，依赖于邻居之间的歌曲匹配，是驱动歌曲分歧的有效机制。最重要的是，歌曲学习是决定性的，导致遗传分歧和歌曲分歧之间的不一致的人群。因此，歌曲学习往往阻止了预期的负面关系的程度，歌曲分歧和扩散。这些发现可能有助于解释经验数据的歌曲分歧和基因流，并提供定性和可测试的预测条件下，种内的歌曲变化可能会促进生殖分歧和物种形成。(C)2003年由Elsevier Science Ltd代表动物行为研究协会出版。
The importance of bird song in sexual selection and the widespread existence of geographical variation in song has raised the question of whether dialects can promote the evolution of new, reproductively isolated, subgroups. However, the effect of song learning on the relation between song divergence and gene flow is still poorly understood. We explored the origin and maintenance of song divergence and its consequences for male dispersal between populations. To do this, we used a spatially explicit model to study the effect of vocal learning mode (predispersal and postdispersal) and the role of intrasexual selection among males. The majority of scenarios simulated in the model led to significant genetic and phenotypic song divergence, consistent with the widespread occurrence of dialects in natural populations. Intrasexual selection in the form of male exclusion, dependent on song matching between neighbours, was an efficient mechanism driving song divergence. Most importantly, song learning was decisive in causing an incongruence of genetic divergence and song divergence between populations. As a consequence, song learning often prevented the expected negative relation between the degree of song divergence and dispersal. These findings may help to interpret empirical data on song divergence and gene flow and provide qualitative and testable predictions for conditions under which intraspecific song variation may promote reproductive divergence and speciation. (C) 2003 Published by Elsevier Science Ltd on behalf of The Association for the Study of Animal Behaviour.