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Vol. 46 No. 1, 2007
Sexual Differences in the Spawning Sounds of the Japanese
Croaker, Argyrosomus japonicus (Sciaenidae)
Jinn-Pyng
Ueng1, Bao-Quey Huang2, and Hin-Kiu Mok3,*
1Department
of Aquaculture, National Penghu University, Penghu 880, Taiwan
2Department
of Biological Science and Technology, China Institute of Technology,
245 Academia Rd., Sec. 3, Nankang, Taipei 115, Taiwan
3Institute of Marine Biology, National Sun Yat-Sen
University, Kaohsiung 804, Taiwan
Jinn-Pyng
Ueng, Bao-Quey Huang, and Hin-Kiu Mok (2007) Sexual differences
in the calls voluntarily emitted during the spawning season of the
Japanese croaker (Argyrosomus
japonicus)
raised in tanks and ponds in the Penghu Archipelago, Taiwan, are
described. Calls are composed of a train of pulses of drumming sounds
and were heard primarily after dusk. The spawning-season advertisement
calls of the male and female differ; females generated significantly
more pulses per call, and their calls had a longer call duration, a
shorter pulse period, and a lower dominant frequency than those of
males. Both sexes vocalized during the actual spawning, and their
activities are described herein. Possible roles of these sounds are
discussed.
Key words: Fish
sounds, Penghu Islands, Sound production, Spawning sounds, Sexual
dimorphism.
*Correspondence: E-mail:hinkiu@mail.nsysu.edu.tw
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