Stereotypy and variation of the mating call in the Lusitanian toadfish, Halobatrachus didactylus
Stereotypy and variation of the mating call in the Lusitanian toadfish, Halobatrachus didactylus
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DOI：
10.1007/s00265-010-1072-3
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发表时间：
2011-04-01
影响因子：
2.3
通讯作者：
Fonseca, Paulo J.
中科院分区：
文献类型：
--
作者：
Amorim, Maria Clara P.;Simoes, Jose Miguel;Fonseca, Paulo J.
信号属性应根据要传达的信息显示不同程度的可变性。物种身份通常与信号的刻板特征相关，而其他类型的信息，如个体素质和动机，则与信号的可塑性相关。卢西塔尼亚蟾鱼雄性在繁殖季节形成聚集，并发出音调广告叫声（船哨）来吸引配偶到它们的巢穴。我们测试的假设，船哨可以传达信息的个人身份和动机，通过检查信号参数如何随时间变化。我们研究如何的物理（潮汐水平）和社会（单独或在合唱）的环境和男性呼叫率影响这个广告信号，以及如何所有这些外部和内部因素（环境，社会和男性的动机）混合调制卢西塔尼亚蟾鱼的广告呼叫。每个男性的船哨在短时间内（分钟）是非常刻板的，但男性内的信号变异性大大增加，在较长的时间尺度（天）。然而，即使在很长的时间尺度上，男性之间的差异仍然很大。脉冲周期是最有助于区分男性的声学特征。潮汐水平和男性的呼叫率调制船哨的特点，有一个不同的影响，潮汐上的呼叫属性取决于男性的呼叫率。社会声环境只影响呼叫率。这些结果表明，在呼叫特性和呼叫可塑性的个体间差异可能介导的男性-男性评估和择偶。
Signal attributes should show different degrees of variability depending on the information to be conveyed. Species identity is usually associated with stereotyped features of a signal, whereas other types of information such as individual quality and motivation are associated with signal plasticity. Lusitanian toadfish males form aggregations during the breeding season and emit a tonal advertisement call (the boatwhistle) to attract mates to their nests. We test the hypothesis that the boatwhistle can convey information both on individual identity and motivation by checking how signal parameters vary with time. We study how the physical (tide level) and social (calling alone or in a chorus) environments and male calling rate affect this advertisement signal and how all these external and internal factors (environment, social and male motivation) blend to modulate the Lusitanian toadfish's advertisement call. Boatwhistles of each male were very stereotyped in short periods of time (minutes), but intra-male signal variability greatly increased in a longer time scale (days). Nevertheless, significant differences among males could still be found even in a long time scale. Pulse period was the acoustic feature that most contributed to discriminate among males. Tide level and male calling rate modulated boatwhistle characteristics, and there was a differential effect of tide on call attributes depending on male calling rate. Social acoustic environment only affected calling rate. These results suggest that inter-individual differences in call characteristics and call plasticity may mediate both male-male assessment and mate choice.