ABSTRACT

The advertisement call contains important spectral and temporal information for species-specific recognition and is generally related to sexual attraction. On the other hand, the territorial call is emitted to defend a specific territory from conspecifics or heterospecifics. Therefore, we hypothesised that the territorial call of sympatric and close related species is more similar to each other (as a result of convergence or lack of divergence) than their advertisement calls. In order to test this hypothesis, we examined the territorial and advertisement calls of five anuran species of the genus Scinax. These species are sympatric and two of them were previously observed displaying heterospecific territorial communication. We redescribed the advertisement and territorial calls of these five species, compared them with cluster analyses and found that acoustic characteristics of the territorial calls were more similar to each other than that of their advertisement calls. These results could be indicative of a convergent selective pressure for the territorial call in opposite to a divergent selective pressure for the advertisement call. This pattern may be more widespread than reported and future directions are proposed.

摘要

广告调用包含用于特定物种识别的重要光谱和时间信息，并且通常与性吸引力有关。另一方面，发出领土呼吁以保护特定领土免受同种或异种的侵害。因此，我们假设同域和近缘物种的领土呼唤比它们的广告呼唤更相似（由于趋同或缺乏分歧）。为了检验这一假设，我们研究的属五个蜮种领土和广告电话Scinax. 这些物种是同域的，其中两个以前被观察到显示出异种领土交流。我们重新描述了这五个物种的广告和领土呼叫，将它们与聚类分析进行了比较，发现领土呼叫的声学特征比它们的广告呼叫的声学特征更相似。这些结果可以指示与广告呼叫的发散选择压力相反的区域呼叫的会聚选择压力。这种模式可能比报告的更广泛，并提出了未来的方向。