Purring Crickets: The Evolution of a Novel Sexual Signal
Purring Crickets: The Evolution of a Novel Sexual Signal
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DOI：
10.1086/700116
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发表时间：
2018-12-01
影响因子：
2.9
通讯作者：
Wilson, Jacob D.
中科院分区：
文献类型：
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作者：
Tinghitella, Robin M.;Broder, E. Dale;Wilson, Jacob D.
观察当代信号变化的机会非常罕见，但对于了解多样性是如何创造和维持的至关重要。我们发现了一个太平洋田野蟋蟀（Teleogryllus oceanicus）的种群，它有一种新进化的歌声（咕噜声），与任何已知的蟋蟀都不同。雄蟋蟀用歌声吸引远处的雌蟋蟀，并在靠近时向雌蟋蟀求爱。Teleogryllus oceanicus是众所周知的性信号进化，最近的信号丢失的例子。在这项研究中，我们描述了新的咕噜声，并调查了咕噜声在长距离和短距离通信中的作用。这种咕噜声在峰值频率、振幅和带宽上与典型的祖先叫声不同。此外，长距离的咕噜声有助于配偶的位置，虽然求爱咕噜声的作用还不太清楚。我们发现雄性蟋蟀会发出呼噜声，这是一个前所未有的机会，可以观察到一种新进化的性信号在真实的时间里展现出来，并有可能阐明两性之间进化新奇性的产生和共同进化的机制。
Opportunities to observe contemporary signal change are incredibly rare but critical for understanding how diversity is created and maintained. We discovered a population of the Pacific field cricket (Teleogryllus oceanicus) with a newly evolved song (purring), different from any known cricket. Male crickets use song to attract females from afar and to court females once near. Teleogryllus oceanicus is well known for sexual signal evolution, as exemplified by a recent signal loss. In this study, we characterized the new purring sound and investigated the role of the purr in long-distance and short-distance communication. The purring sound differed from typical ancestral calls in peak frequency, amplitude, and bandwidth. Further, the long-distance purring song facilitated mate location, though the role of courtship purring song is less clear. Our discovery of purring male crickets is an unprecedented opportunity to watch the emergence of a newly evolved sexual signal unfold in real time and has potential to illuminate the mechanisms by which evolutionary novelties arise and coevolve between the sexes.