A novel cricket morph has diverged in song and wing morphology across island populations
A novel cricket morph has diverged in song and wing morphology across island populations
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一种新的蟋蟀变形在不同岛屿种群中的鸣声和翅膀形态上有所不同
DOI：
10.1111/jeb.14235
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发表时间：
2023
影响因子：
2.1
通讯作者：
Tinghitella, Robin M.
中科院分区：
文献类型：
--
作者：
Gallagher, James H.;Zonana, David M.;Broder, E. Dale;Syammach, Aziz M.;Tinghitella, Robin M.
种群之间性信号的差异可能导致物种形成，但研究新信号进化的直接后果的机会很少。最近，夏威夷太平洋田蟋蟀（Teleogryllus oceanicus）种群中出现并传播了一种新的交配歌曲“呼噜声”，这使我们能够在新信号发出后不久调查种群分化。雄性蟋蟀通过特殊的翅膀结构发出歌曲来吸引远方的配偶（呼叫）并引诱它们被发现时交配（求偶）。然而，在夏威夷，这些歌曲也会吸引一种偷听的寄生蝇（Ormia ochracea），这种蝇会杀死唱歌的雄性蝇。这种新颖的咕噜声是通过对翅膀形态进行了重大修改而产生的，吸引了雌性蟋蟀，但不吸引寄生蝇，从而解决了自然选择和性选择之间的冲突。我们最近观察到夏威夷各地发出呼噜声的雄性数量不断增加。在这项综合性实地研究中，我们调查了四个岛屿上六个种群中咕噜声的分布以及雄性咕噜声相对于其他形态的比例，并比较了一系列表型特征（翅膀形态、鸣叫声和求偶声），这些特征在雄性咕噜声种群中构成了这种新的信号。我们发现，咕噜声在五个夏威夷种群中以不同比例存在，并且在四个夏威夷种群中占主导地位。我们还表明，雄性的呼噜声、求偶声和翅膀形态因地理位置而异。我们的研究结果证明了岛屿人口的快速进化速度，并提供了对新性信号随时间的出现和分歧的见解。摘要成功的新性信号出现后立即发生了什么？这些进化事件的转瞬即逝使得它们难以研究，但它们对我们理解物种形成具有重要意义。几年前，夏威夷出现了一种新的雄性蟋蟀变种，它利用改变的翅膀形态产生了一种新颖的性信号（歌曲）。这种新颖的“咕噜声”歌曲对雌性蟋蟀很有吸引力，但可以防止致命的、窃听的寄生蝇，成为蟋蟀之间新的私人交流方式。在这项研究中，我们表明，尽管雄性咕噜声最近才出现，但现在在夏威夷各地的多个种群中都发现了这种咕噜声，甚至已经对其中一个种群产生了固定。也许令人惊讶的是，我们还发现，发出呼噜声的雄性的翅膀和歌曲现在因地理位置而异。这些变化发生的加速时间为小岛屿人口中性信号如何分化提供了新的见解。
Divergence of sexual signals between populations can lead to speciation, yet opportunities to study the immediate aftermath of novel signal evolution are rare. The recent emergence and spread of a new mating song, purring, in Hawaiian populations of the Pacific field cricket (Teleogryllus oceanicus) allows us to investigate population divergence soon after the origin of a new signal. Male crickets produce songs with specialized wing structures to attract mates from afar (calling) and entice them to mate when found (courtship). However, in Hawaii, these songs also attract an eavesdropping parasitoid fly (Ormia ochracea) that kills singing males. The novel purring song, produced with heavily modified wing morphology, attracts female crickets but not the parasitoid fly, acting as a solution to this conflict between natural and sexual selection. We've recently observed increasing numbers of purring males across Hawaii. In this integrative field study, we investigated the distribution of purring and the proportion of purring males relative to other morphs in six populations on four islands and compared a suite of phenotypic traits (wing morphology, calling song and courtship song) that make up this novel signal across populations of purring males. We show that purring is found in varying proportions across five, and is locally dominant in four, Hawaiian populations. We also show that calling songs, courtship songs and wing morphology of purring males differ geographically. Our findings demonstrate the rapid pace of evolution in island populations and provide insights into the emergence and divergence of new sexual signals over time.AbstractWhat occurs immediately following the emergence of a successful new sexual signal? The fleeting nature of these evolutionary events makes them difficult to study, yet they have important implications for our understanding of speciation. Several years ago, a new male cricket morph arose in Hawaii that produced a novel sexual signal (song) using altered wing morphology. This novel ‘purring’ song is attractive to female crickets but protective against a deadly, eavesdropping parasitoid fly, serving as a new private mode of communication among crickets. In this study, we show that despite arising very recently, purring males are now found in multiple populations across Hawaii and have even reached fixation in one. Perhaps surprisingly, we also find that the wings and songs of purring males now differ geographically. The accelerated timeframe in which these changes have occurred provides new insights into how sexual signals can diverge in small island populations.
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DOI：
10.1080/09524622.2017.1396498
发表时间：
2019-01-02
影响因子：
1.8
作者：
Araya-Salas, Marcelo;Smith-Vidaurre, Grace;Webster, Michael
通讯作者：
Webster, Michael
DOI：
10.1086/587071
发表时间：
2008-03
期刊：
The American Naturalist
影响因子：
--
作者：
N. Seddon;R. Merrill;J. Tobias
通讯作者：
N. Seddon;R. Merrill;J. Tobias
影响因子：
2.8
作者：
Bennet-Clark, HC
通讯作者：
Bennet-Clark, HC
尽管强烈的性选择有利于唱歌的雄性，但田间蟋蟀的性信号丢失仍然存在
影响因子：
3.3
作者：
Tanner, Jessie C.;Swanger, Elizabeth;Zuk, Marlene
通讯作者：
Zuk, Marlene
影响因子：
3.3
作者：
Jack G. Rayner;W. Schneider;N. Bailey
通讯作者：
N. Bailey