Reference : Agonistic sounds in the clownfish Amphiprion clarkii: implication of the swimbladder in ...

	Document type :	Scientific congresses and symposiums : Poster
	Discipline(s) :	Life sciences : Zoology
	To cite this reference:	http://hdl.handle.net/2268/124396

Title :	Agonistic sounds in the clownfish Amphiprion clarkii: implication of the swimbladder in the sound-producing mechanism
Language :	English
Author, co-author :	Colleye, Orphal [Université de Liège - ULg > Département de Biologie, Ecologie et Evolution > Morphologie fonctionnelle et évolutive >]
	Nakamura, Masaru [Sesoko Station - Tropical Biosphere Research Center > > > >]
	Parmentier, Eric [Université de Liège - ULg > Département de Biologie, Ecologie et Evolution > Morphologie fonctionnelle et évolutive >]
Publication date :	2009
Event name :	16th Benelux Congress of Zoology
Event date :	du 28 octobre au 30 octobre 2009
Event organizer :	The Royal Belgian Zoological Society
Event place (city) :	Wageningen
Event country :	The Netherlands
Keywords :	[en] Pomacentridae ; clownfish ; sound production ; swimbladder
Abstract :	[en] Clownfishes are aggressive fishes that use sound production to defend their anemone territory. It has been shown that they produce agonistic sounds using a jaw teeth snapping. At present, this mechanism has highlighted the onset of the sound but has not explained yet which structure is responsible for the sound modulation. Interestingly, some acoustic features such as dominant frequency and pulse duration are directly related to fish size. Such variations are linked to a morphological constraint. Also, the existent relationship between fish size and swimbladder size implies that the swimbladder might be involved in the sound production. Sound analyses in Amphiprion clarkii showed that the experimental filling of the swimbladder with physiological liquid (NaCl 9‰) significantly modified the acoustic features. The most striking changes were a significant increase in dominant frequency and a significant decrease in pulse duration. These observations highlighted the implication of the swimbladder in sound modulation. In clownfishes, dominant frequency and pulse duration are morphologically determined signals. The swimbladder appears to modulate these acoustic features by acting as a resonant chamber.
Research units :	Laboratoire de Morphologie Fonctionnelle et Evolutive
Funders :	Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS ; Communauté française de Belgique - CfB
Target :	Researchers ; Professionals ; Students
Permalink :	http://hdl.handle.net/2268/124396

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