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Sound characteristics and the sound producing system in silver sweeper, Pempheris schwenkii (Perciformes: Pempheridae)

Published online by Cambridge University Press:  08 January 2004

M. Takayama ,
A. Onuki ,
T. Yosino ,
M. Yoshimoto ,
H. Ito ,
J. Kohbara  and
H. Somiya
M. Takayama
Affiliation:
Faculty of Bioresources, Mie University, 1515 Kamihama, Tsu, Mie 514-8507, Japan
A. Onuki
Affiliation:
Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan
T. Yosino
Affiliation:
College of Science, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa 903-0213, Japan
M. Yoshimoto
Affiliation:
Department of Anatomy, Nippon Medical School, Bunkyo-ku, Tokyo 113-8602, Japan
H. Ito
Affiliation:
Department of Anatomy, Nippon Medical School, Bunkyo-ku, Tokyo 113-8602, Japan
J. Kohbara
Affiliation:
Faculty of Bioresources, Mie University, 1515 Kamihama, Tsu, Mie 514-8507, Japan
H. Somiya
Affiliation:
Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan
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Abstract

The sound characteristics and the sound producing system in silver sweeper, Pempheris schwenkii, are described. The main frequency component of the emitted sounds was 100–300 Hz, the mean duration of the sounds being 56 ms. The sounds were produced by paired extrinsic sonic muscles vibrating the swimbladder. The sonic muscles originated on the pterotic bones and extended to the anterodorsal surface of the swimbladder, and were innervated by two branches of the occipital nerves. Moreover significant sexual dimorphism of the sonic muscles was observed, those in males being three times as large as in females.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 83 , Issue 6 , December 2003 , pp. 1317 - 1320
Copyright
2003 Marine Biological Association of the United Kingdom

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