Parmentier E, Lagardère J P, Vandewalle P, Fine M L
Laboratoire de Morphologie Fonctionnelle et Evolutive, Institut de Chimie, Université de Liège, Bâtiment B6, 4000 Liège, Belgium.
Proc Biol Sci. 2005 Aug 22;272(1573):1697-703. doi: 10.1098/rspb.2005.3146.
Because of pelagic-larval dispersal, coral-reef fishes are distributed widely with minimal genetic differentiation between populations. Amphiprion akallopisos, a clownfish that uses sound production to defend its anemone territory, has a wide but disjunct distribution in the Indian Ocean. We compared sounds produced by these fishes from populations in Madagascar and Indonesia, a distance of 6500 km. Differentiation of agonistic calls into distinct types indicates a complexity not previously recorded in fishes' acoustic communication. Moreover, various acoustic parameters, including peak frequency, pulse duration, number of peaks per pulse, differed between the two populations. The geographic comparison is the first to demonstrate 'dialects' in a marine fish species, and these differences in sound parameters suggest genetic divergence between these two populations. These results highlight the possible approach for investigating the role of sounds in fish behaviour in reproductive divergence and speciation.
由于浮游幼体扩散，珊瑚礁鱼类分布广泛，种群间遗传分化极小。眼斑双锯鱼是一种通过发声来保卫海葵领地的小丑鱼，在印度洋有着广泛但不连续的分布。我们比较了来自马达加斯加和印度尼西亚种群的这些鱼类发出的声音，两地相距6500公里。争斗叫声分化为不同类型，这表明了鱼类声学通讯中前所未有的复杂性。此外，包括峰值频率、脉冲持续时间、每个脉冲的峰值数量在内的各种声学参数，在两个种群之间存在差异。这种地理比较首次证明了海洋鱼类物种中存在“方言”，并且声音参数的这些差异表明这两个种群之间存在遗传分歧。这些结果突出了研究声音在鱼类生殖分化和物种形成行为中作用的可能方法。
