Hubáček Jiří, Šugerková Monika, Gvoždík Lumír
Department of Botany and Zoology, Masaryk University, Brno, Czech Republic.
Institute of Vertebrate Biology of the Czech Academy of Sciences, Brno, Czech Republic.
PeerJ. 2019 Mar 28;7:e6649. doi: 10.7717/peerj.6649. eCollection 2019.
Sound production is a widespread phenomenon among animals. Effective sound use for mate or species recognition requires some acoustic differentiation at an individual or species level. Several species of caudate amphibians produce underwater sounds, but information about intra- and interspecific variation in their acoustic production is missing. We examined individual, sex, and species variation in underwater sound production in adults of two sympatric newt taxa, and . Individual newts produced simple low- (peak frequency = 7-8 kHz) and mid-high frequency (14-17 kHz) clicks, which greatly overlap between sexes and species. Individual differences explained about 40-50% of total variation in sound parameters. These results provide foundations for further studies on the mechanisms and eco-evolutionary consequences of underwater acoustics in newts.
声音产生是动物中一种普遍存在的现象。有效地利用声音进行配偶识别或物种识别需要在个体或物种层面上进行一些声学区分。几种有尾两栖动物会发出水下声音，但关于它们声学产生的种内和种间变异的信息却缺失。我们研究了两种同域蝾螈类群的成年个体在水下声音产生方面的个体、性别和物种变异。个体蝾螈会发出简单的低频（峰值频率 = 7 - 8千赫兹）和中高频（14 - 17千赫兹）咔哒声，这些声音在性别和物种之间有很大重叠。个体差异解释了声音参数总变异的约40 - 50%。这些结果为进一步研究蝾螈水下声学的机制和生态进化后果奠定了基础。
