A basic study for the behaviour control of sevenband grouper, Epinephelus septem fasciatus, to underwater low frequency sound I. The Auditory thresholds of sevenband grouper

수중 저주파에 의한 능성어 (Epinephelus septem fasciatus)의 행동제어에 관한 기초적 연구 I. 능성어의 청각문턱치

  • 양용수 (국립수산진흥원)
  • Published : 1999.11.01

Abstract

It is well known that fish hear a wide frequency range of sound using both laterial line and inner ear, and the sound is probably the most effective channel for long-range communication underwater than any other stimulus.The auditory threshold of svenband grouper, Epinephelus septem fasciatus was determined by conditioning method using a sound coupled with electric shock in a tank. The audio-signals and electric shock used in the experiment were pure tones of 100 to 1000Hz and DC 6n.The response of fish to the sound was observed by ECG intervals from precordial leads method (V1·V2 method). The auditory threshold curve for sevenband grouper was V-shaped, with most sensitive threshold at 350Hz in the range of 100~1000Hz. The Sevenband grouper were more sensitive to sounds of 200~400Hz than to adjacent frequencies.

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References

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