Goutte S, Dubois A, Howard S D, Márquez R, Rowley J J L, Dehling J M, Grandcolas P, Xiong R C, Legendre F
Muséum national d'Histoire naturelle, Institut de Systématique, Evolution, Biodiversité, ISYEB - UMR 7205 CNRS MNHN UPMC EPHE, Sorbonne Universités, Paris Cedex 05, France.
Department of Biological Sciences, National University of Singapore, Singapore, Singapore.
J Evol Biol. 2018 Jan;31(1):148-158. doi: 10.1111/jeb.13210. Epub 2017 Dec 4.
Long-distance acoustic signals are widely used in animal communication systems and, in many cases, are essential for reproduction. The acoustic adaptation hypothesis (AAH) implies that acoustic signals should be selected for further transmission and better content integrity under the acoustic constraints of the habitat in which they are produced. In this study, we test predictions derived from the AAH in frogs. Specifically, we focus on the difference between torrent frogs and frogs calling in less noisy habitats. Torrents produce sounds that can mask frog vocalizations and constitute a major acoustic constraint on call evolution. We combine data collected in the field, material from scientific collections and the literature for a total of 79 primarily Asian species, of the families Ranidae, Rhacophoridae, Dicroglossidae and Microhylidae. Using phylogenetic comparative methods and including morphological and environmental potential confounding factors, we investigate putatively adaptive call features in torrent frogs. We use broad habitat categories as well as fine-scale habitat measurements and test their correlation with six call characteristics. We find mixed support for the AAH. Spectral features of torrent frog calls are different from those of frogs calling in other habitats and are related to ambient noise levels, as predicted by the AAH. However, temporal call features do not seem to be shaped by the frogs' calling habitats. Our results underline both the complexity of call evolution and the need to consider multiple factors when investigating this issue.
长距离声学信号在动物通讯系统中被广泛使用，并且在许多情况下，对繁殖至关重要。声学适应假说（AAH）意味着，在其产生的栖息地的声学限制条件下，声学信号应被选择用于进一步传播并保持更好的内容完整性。在本研究中，我们测试了从AAH推导出来的关于青蛙的预测。具体而言，我们关注急流蛙与在噪音较小栖息地鸣叫的青蛙之间的差异。急流会产生能够掩盖青蛙叫声的声音，并且对叫声进化构成主要的声学限制。我们结合了实地收集的数据、科学标本材料以及文献资料，涵盖了蛙科、树蛙科、叉舌蛙科和姬蛙科总共79种主要分布于亚洲的物种。使用系统发育比较方法，并纳入形态学和环境等潜在混杂因素，我们研究了急流蛙可能具有适应性的叫声特征。我们使用宽泛的栖息地类别以及精细尺度的栖息地测量数据，并测试它们与六种叫声特征的相关性。我们发现对AAH的支持情况不一。正如AAH所预测的那样，急流蛙叫声的频谱特征与在其他栖息地鸣叫的青蛙不同，并且与环境噪音水平相关。然而，叫声的时间特征似乎并非由青蛙的鸣叫栖息地所塑造。我们的结果强调了叫声进化的复杂性以及在研究这个问题时考虑多种因素的必要性。
