Multimodal signalling in estrildid finches: song, dance and colour are associated with different ecological and life-history traits
Multimodal signalling in estrildid finches: song, dance and colour are associated with different ecological and life-history traits
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DOI：
10.1111/jeb.13102
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发表时间：
2017-07-01
影响因子：
2.1
通讯作者：
Cardoso, G. C.
中科院分区：
文献类型：
--
作者：
Gomes, A. C. R.;Funghi, C.;Cardoso, G. C.
性特征（例如视觉装饰、声音信号、求偶行为）通常作为多模态信号一起显示。一些假设预测不同的性信号的联合进化（例如，以提高通信的效率）或不同的信号相互权衡（例如，由于资源有限）。可替换地，多个信号可以独立地演进用于不同的功能，或者传送不同的信息（多消息假设）。我们评估了这些假设在家庭Estrildidae的比较研究，最大的鸣禽辐射之一，其中包括许多模式物种的性选择和通信的研究。我们几乎没有发现任何证据，无论是共同进化或权衡之间的歌曲和颜色表现。舞蹈曲目和歌曲特征之间的一些负相关性可能表明功能上的妥协，但通常求爱舞蹈也独立于其他信号进化。我们发现，歌曲、舞蹈和颜色都与不同的社会生态特征有关，而不是相关的进化。歌曲的复杂性与生态的普遍性，歌曲的表现与繁殖的投资，舞蹈与共性和栖息地类型一起演变，而以前的研究表明，颜色识别主要与合群。我们的结论是，多模态信号的演变响应于各种社会生态特征，这表明不同的信号功能的积累。
Sexual traits (e.g. visual ornaments, acoustic signals, courtship behaviour) are often displayed together as multimodal signals. Some hypotheses predict joint evolution of different sexual signals (e.g. to increase the efficiency of communication) or that different signals trade off with each other (e.g. due to limited resources). Alternatively, multiple signals may evolve independently for different functions, or to communicate different information (multiple message hypothesis). We evaluated these hypotheses with a comparative study in the family Estrildidae, one of the largest songbird radiations, and one that includes many model species for research in sexual selection and communication. We found little evidence for either joint evolution or trade-offs between song and colour ornamentation. Some negative correlations between dance repertoire and song traits may suggest a functional compromise, but generally courtship dance also evolved independently from other signals. Instead of correlated evolution, we found that song, dance and colour are each related to different socio-ecological traits. Song complexity evolved together with ecological generalism, song performance with investment in reproduction, dance with commonness and habitat type, whereas colour ornamentation was shown previously to correlate mostly with gregariousness. We conclude that multimodal signals evolve in response to various socio-ecological traits, suggesting the accumulation of distinct signalling functions.