수산해양기술연구 (Journal of the Korean Society of Fisheries and Ocean Technology)

  • 제59권2호
  • /
  • Pages.125-134
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  • 2023
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  • 2671-9940(pISSN)
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  • 2671-9924(eISSN)
한국수산해양기술학회 (The Korean Society of Fisheries and Ocean Technology)
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이미징 소나를 이용한 외해가두리 내 참다랑어의 유영 행동 모니터링

Swimming behavior monitoring of Pacific bluefin tuna (Thunnus orientalis) in the offshore sea cage using the imaging sonar

  • 황보규 (군산대학교 해양수산관리전공) ;
  • 강명희 (경상국립대학교 해양경찰시스템학과) ;
  • 김민선 (군산대학교 해양수산관리전공)
  • Bo-Kyu HWANG (Oceans and Fisheries Management Major, Kunsan National University) ;
  • Myounghee KANG (Department of Maritime Police and Production System/Institute of Marine Industry, Gyeongsang National University) ;
  • Min-Son KIM (Oceans and Fisheries Management Major, Kunsan National University)
  • Received : 2023.03.24
  • Accepted : 2023.05.02
  • Published : 2023.05.31
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Abstract

The swimming behavior of pacific bluefin tuna (Thunnus orientalis) in the offshore sea cage of the brass fishing net was observed and analyzed by imaging sonar techniques. The cultured fish spent most of the time swimming a circular path along the circular cage wall and continued to swim only clockwise direction without completely changing the swimming direction during the 23-hour observation time. In addition, changed swimming behaviors were divided into four categories: (a) the behavior of a large group temporarily swimming in the opposite (counter clockwise) direction, (b) the behavior of a small group temporarily swimming in a small circular path, (c) the behavior swimming small circular path in the center of the cage, and (d) the behavior of a large group swimming across the center of the cage. The maximum swimming speed of the cultured fish was from 3.5 to 3.8 TL/s, the mode was from 1.2 to 1.4 TL/s and the swimming speed during the day time was faster than at night time. It was confirmed the cultured fish swam not only on the surface but also near the bottom net of the cage during the day, but swam mainly at the upper part of the cage at night.

Keywords

Acknowledgement

이 논문은 2022년 군산대학교 수산과학연구소 학술과제 지원에 의하여 연구되었음.

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