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| Parmentier, E; Lagardere, Jean-paul; Vandewalle, P; Fine, M. |
| 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... |
| Tipo: Text |
Palavras-chave: Speciation; Dialect; Geographic variation; Pomacentridae; Sound production. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/publication-3630.pdf |
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| Parmentier, E; Lagardere, Jean-paul; Braquegnier, J; Vandewalle, P; Fine, M. |
| Fish sonic swimbladder muscles are the fastest muscles in vertebrates and have fibers with numerous biochemical and structural adaptations for speed. Carapid fishes produce sounds with a complex swimbladder mechanism, including skeletal components and extrinsic sonic muscle fibers with an exceptional helical myofibrillar structure. To study this system we stimulated the sonic muscles, described their insertion and action and generated sounds by slowly pulling the sonic muscles. We find the sonic muscles contract slowly, pulling the anterior bladder and thereby stretching a thin fenestra. Sound is generated when the tension trips a release system that causes the fenestra to snap back to its resting position. The sound frequency does not correspond to the... |
| Tipo: Text |
Palavras-chave: Swimbladder; Sonic mechanism; Sonic muscle; Sound production; Carapidae. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-7353.pdf |
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