Labroid fishes (PerciformesLabroidei) possess a highly developed pharyngeal jaw apparatus (PJA). A tremendous body of literature describes the anatomy and function in feeding in these fishes. For fishes of the families Pomacentridae and Cichlidae (damselfishes and cichlids), there are also numerous descriptions of the sounds these male fishes produce in reproductive or agonistic behavioral contexts. A growing amount of acoustic, behavioral, and physiological circumstantial evidence draws support for the PJA also being the sound producing mechanism. The present review discusses the evolutionary and ecological aspects of the PJA, the anatomy and function, as well as the acoustical biology of pomacentrids and cichlids. Using existing evidence, we propose and examine the possibility that the PJA (either muscles and/or bone) is used in this behavior. Should the PJA be involved in sound production, the duality in function for both feeding and sound production creates an interrelationship between trophic biology and sexual selection. Thus, particularly in cichlids, the expansion into available trophic niches, mediated by the food processing ability of the versatile PJA may influence female mate choices and serve as a substrate for sympatric speciation.
Reviews in Fish Biology and Fisheries – Springer Journals
Published: Dec 30, 2004
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