Melodic males and flashy females: Geographic variation in male and female reproductive behavior in red-eyed treefrogs (Agalychnis callidryas)
Melodic males and flashy females: Geographic variation in male and female reproductive behavior in red-eyed treefrogs (Agalychnis callidryas)
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DOI：
10.1111/eth.12705
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发表时间：
2018-01-01
期刊：
影响因子：
1.7
通讯作者：
Robertson, Jeanne M.
中科院分区：
文献类型：
--
作者：
Akopyan, Maria;Kaiser, Kristine;Robertson, Jeanne M.
求偶行为的地理差异可以通过配偶选择影响不同表型的繁殖成功。随着时间的推移，这可能导致生殖隔离，最终导致物种形成。新热带红眼树蛙在哥斯达黎加和巴拿马的种群中表现出高度的表型差异，包括颜色模式、身体大小和皮肤多肽的差异。为了测试不同群体中行为优先隔离的程度，我们量化了来自六个地点的男性广告呼叫和来自四个地点的女性对男性刺激(声音和视觉信号)的反应。结果表明，男性的广告呼叫量和女性的行为因人群而异：判别函数分析可以根据男性呼叫量(主要频率和带宽)预测99.3%+/-0.7%的男性和76.1%+/-6.6%的女性根据女性反应行为(视觉显示的频率和时长)预测起源人口。此外，女性配偶选择试验(n=69)表明，男性信号的群体差异与女性对局部男性刺激的偏好有关。总而言之，这些结果表明，种群之间在雄性叫声特性和雌性反应信号方面的进化差异可能会导致生殖隔离。最后，地理或遗传距离不能很好地解释雄性和雌性行为的群体差异，这表明了局部选择和/或漂移的作用。男性求爱和女性反应之间的相互作用可能促进了求爱风格的局部变异的进化，从而加速了通过分类交配而形成的隔离。
Geographic variation in courtship behavior can affect reproductive success of divergent phenotypes via mate choice. Over time, this can lead to reproductive isolation and ultimately to speciation. The Neotropical red-eyed treefrog (Agalychnis callidryas) exhibits high levels of phenotypic variation among populations in Costa Rica and Panama, including differences in color pattern, body size, and skin peptides. To test the extent of behavioral premating isolation among differentiated populations, we quantified male advertisement calls from six sites and female responses to male stimuli (acoustic and visual signals) from four sites. Our results show that both male advertisement calls and female behavior vary among populations: Discriminant function analyses can predict the population of origin for 99.3%+/- 0.7 of males based on male call (dominant frequency and bandwidth) and 76.1%+/- 6.6 of females based on female response behavior (frequency and duration of visual displays). Further, female mate choice trials (n=69) showed that population divergence in male signals is coupled with female preference for local male stimuli. Combined, these results suggest that evolved differences among populations in male call properties and female response signals could have consequences for reproductive isolation. Finally, population variation in male and female behavior was not well explained by geographic or genetic distance, indicating a role for localized selection and/or drift. The interplay between male courtship and female responses may facilitate the evolution of local variants in courtship style, thus accelerating premating isolation via assortative mating.