Geographical variation in sound production in the anemonefish Amphiprion akallopisos
|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|
|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.|