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• W2086266193 abstract "SUMMARY Acoustic behaviors are widespread among diverse fish taxa but mechanisms of sound production are known from relatively few species, vary widely and convergent mechanisms are poorly known. We examined the sound production mechanism in the pyramid butterflyfish, Hemitaurichthys polylepis, a member of the socially and ecologically diverse reef fish family Chaetodontidae. In the field, fish produce pulse trains at dusk during social interactions that are probably related to mate attraction and courtship. In laboratory experiments, sound production was synchronized to high-speed video to determine body movement associated with sound generation. In addition, electromyography (EMG) recordings tested the activity of six candidate muscles. Fish produced individual pulses with a mean peak frequency of 97 Hz in rapid succession. EMG experiments show that anterior hypaxial muscles contract at high bilaterally synchronous rates (up to 120 Hz) in near perfect association with rapid inward buckling visible outside the body over the anterior swim bladder. Muscle activity often showed EMG doublets that occurred within the time of a single sound pulse but was not sustained. Buckling and sound pulse rates correlated strongly (R2≈1.00) and sound pulse rate measured over two successive pulses (maximum of 38 pulses s–1) was lower than muscle firing rate. These results show that the extrinsic swim bladder muscles of pyramid butterflyfish involve single contractions that produce pulses in a manner similar to distantly related teleosts, but involve a novel doublet motor-neuron firing pattern. Thus, the sound production mechanism in pyramid butterflyfish is likely convergent with several percomorph taxa and divergent from the related chaetodontid genus Forcipiger." @default.
• W2086266193 created "2016-06-24" @default.
• W2086266193 creator A5066682953 @default.
• W2086266193 creator A5089752805 @default.
• W2086266193 date "2010-11-15" @default.
• W2086266193 modified "2023-10-01" @default.
• W2086266193 title "Pulse sound generation, anterior swim bladder buckling and associated muscle activity in the pyramid butterflyfish, <i>Hemitaurichthys polylepis</i>" @default.
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• W2086266193 doi "https://doi.org/10.1242/jeb.048710" @default.
• W2086266193 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/21037068" @default.
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