Laboratory of Functional and Evolutionary Morphology, FOCUS, University of Liège, Liège, 4000, Belgium.
Fish Passage Center, Federal University of Minas Gerais, Belo-Horizonte, 31270-901, MG, Brazil.
J Acoust Soc Am. 2023 Oct 1;154(4):2203-2210. doi: 10.1121/10.0021308.
In different teleost species, sound production can utilize specific coding schemes to avoid confusion between species during communication. Piranhas are vocal Neotropical fishes, and both Pygocentrus and Serrasalmus produce similar pulsed sounds using the same sound-producing mechanism. In this study, we analysed the sounds of three Pygocentrus and nine Serrasalmus species to determine whether sounds can be used to discriminate piranha species at both the species and genus levels. Our analysis of temporal and frequency data supports the idea that the sounds of Serrasalmus and Pygocentrus species are species specific, and that different acoustic features can be used to differentiate taxa at the genus level. Specifically, the sounds of Serrasalmus species are shorter, louder, and have a shorter pulse period (as determined after correction for standard length). This suggests that sounds can be used to support taxonomy at the genus level as well as the species level.
在不同的硬骨鱼类中，声音的产生可以利用特定的编码方案，以避免在交流中混淆物种。水虎鱼是发声的新热带鱼类，而 Pygocentrus 和 Serrasalmus 都使用相同的发声机制产生类似的脉冲声。在这项研究中，我们分析了三种 Pygocentrus 和九种 Serrasalmus 物种的声音，以确定声音是否可以用于在种和属两个水平上区分水虎鱼物种。我们对时间和频率数据的分析支持这样一种观点，即 Serrasalmus 和 Pygocentrus 物种的声音是种特异性的，并且不同的声学特征可用于区分属级别的分类群。具体而言， Serrasalmus 物种的声音更短、更响亮，且脉冲周期更短（在根据标准长度校正后确定）。这表明声音可用于支持属级和种级的分类学。
