Multiple sexual signals: calls over colors for mate attraction in an aposematic, color-diverse poison frog
Multiple sexual signals: calls over colors for mate attraction in an aposematic, color-diverse poison frog
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DOI：
10.3389/fevo.2014.00022
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发表时间：
2014-01-01
影响因子：
3
通讯作者：
Proehl, Heike
中科院分区：
文献类型：
--
作者：
Dreher, Corinna E.;Proehl, Heike
性信号表明物种身份和配偶质量，其对配偶吸引的重要性已得到广泛认可。近年来，对动物交流的研究开始整合多种信号方式并评估它们之间的相互作用。然而，跨动物分类群的交配选择实验仅限于实验室条件，在野外条件下对多种性信号的评估仍然缺乏。我们利用新热带毒蛙种群间视觉和听觉信号的差异来评估雄性广告叫声和颜色图案在雌性择偶中的重要性。之前在这个物种中进行的配偶选择实验表明，在许多种群中，雌性对配偶的颜色选择是一致的。然而，声音信号在青蛙的性选择中是至关重要的，雄性O. pumilio使用广告呼叫来吸引雌性。我们假设，广告叫声和颜色都影响了平毛犀的雌性择偶。为了验证这一假设，我们在哥斯达黎加和巴拿马的六个种群中测试了452只雌性雌性的自然栖息地，以了解它们对本地与非本地广告呼叫和颜色模式的偏好。总的来说，这些叫声掩盖了颜色的影响，因此大多数雌性更喜欢本地叫声而不是非本地叫声。我们发现，在两个种群中，人们倾向于更聪明（但不一定是当地的）的雄性。此外，偏好的强度因地域而异，因此可能与种群间的前合子隔离有关。鸣叫对配偶吸引的强烈影响与种群内遗传群体之间的声学差异有关，而颜色图案多样性主要集中在一个遗传群体内，即与大规模种群结构无关。最后，我们的数据强调了在行为隔离研究中考虑多个野生种群的一系列信号模式的重要性。
Sexual signals indicate species identity and mate quality, and their importance for mate attraction is largely recognized. Recently, research in animal communication has started to integrate multiple signal modalities and evaluate their interactions. However, mate choice experiments across animal taxa have been limited to laboratory conditions, and assessments of multiple sexual signals under field conditions are still lacking. We take advantage of the divergence in visual and acoustic signals among populations of the Neotropical poison frog Oophaga pumilio to evaluate the importance of male advertisement calls and color patterns in female mate selection. Previous mate choice experiments in this species suggested color-assortative female mate preferences across many populations. Nevertheless, acoustic signals are crucial for sexual selection in frogs, and males of O. pumilio use advertisement calls to attract females. We hypothesize that both advertisement calls and coloration affect female mate selection in O.pumilio. To test this hypothesis we tested 452 receptive females from six populations in Costa Rica and Panama in their natural home ranges for preferences regarding local vs. non-local advertisement calls and color patterns. Overall, the calls overrode the effect of coloration, whereby most females preferred local over non-local calls. We found a tendency to prefer brighter (but not necessarily local) males in two populations. Furthermore, the strength of preferences varied geographically, and thus might be involved in prezygotic isolation among populations. The stronger effect of calls on mate attraction is associated with acoustic divergence between genetic groups in the species, while color pattern diversity is mostly located within one genetic group, i.e., not linked to large-scale population structure. Finally our data highlights the importance to consider an array of signal modalities in multiple wild populations in studies of behavioral isolation.