Geographical variation in sound production in the anemonefish Amphiprion akallopisos

Type Article
Date 2005-08
Language English
Author(s) Parmentier E1, Lagardere Jean-Paul2, 4, Vandewalle P1, Fine M3
Affiliation(s) 1 : Univ Liege, Inst Chim, Lab Morphol Fonct & Evolut, B-4000 Liege, Belgium.
2 : CNRS, IFREMER, CREMA LHoumeau, F-17137 Lhoumeau, France.
3 : Virginia Commonwealth Univ, Dept Biol, Richmond, VA 23284 USA.
Source Proceedings of the Royal society of London (B) (0962-8452) (Royal Society of London), 2005-08 , Vol. 272 , N. 1573 , P. 1697-1703
DOI 10.1098/rspb.2005.3146
WOS© Times Cited 38
Keyword(s) Speciation, Dialect, Geographic variation, Pomacentridae, Sound production
Abstract 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.
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