著者

張 国勝 竹村 暘

出版者

長崎大学水産学部

雑誌

長崎大学水産学部研究報告 (ISSN:05471427)

巻号頁・発行日

no.66, pp.p21-30, 1989-10

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The acoustical behavior of Brown Goby Bathygobius fuscus was studied. The calls consisted of a pulse or a series of pulse sounds and grunt sounds. Those calls were lower in frequency and weak in power, because they had not special sound productive mechanism and any amplifier like swimbladder. Then, the effective area of pulse sound was limited in less than several ten centimetres in diameter and that of grunt sound was still smaller. The frequency of pulse sound emitting became high about sunrise and sunset, however, any remarkable tendency in diurnal change was not observed in grunt sound. They usually used the pulse sound for threat and grunt sound for courtship. Then, the pulse sound were heard through the year laying stress on July and August. On the other hand, the grunt sounds were heard only in reproductive season (June through September).