Fisheries and Aquatic Sciences

한국수산과학회 (The Korean Society of Fisheries and Aquatic Science)
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Complex Movements of Skipjack Schools Based on Sonar Observations during Pelagic Purse Seining

  • Kim, Yong-Hae (Institute of Marine Industry, College of Marine Science, Gyeongsang National University)
  • 발행 : 2007.12.31
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초록

The movements of skipjack schools during purse seine operations were observed by scanning sonar in the Southwest Pacific Ocean in April 2004. Swimming speed and directional changes were analyzed in relation to heading of the purse seine during shooting, speed of the purse seiner and distance to the net. Escaped schools turned clockwise (relative to the heading of the purse seiner during shooting) significantly more frequently than captured schools, who primarily turned counter-clockwise. The swimming speed of a fish school, whether it was caught or escaped, was somewhat related to the ship's speed, but swimming speed did not differ between captured and escaped schools. The behavior of skipjack schools during purse seining consists of very complex movements with changes in swimming speed and direction in relation to the nets or purse seiner. Therefore, these responses of skipjack schools to purse seining can be useful for modeling the capture process of purse seining in relation to fishing conditions.

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참고문헌

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피인용 문헌

  1. Simulation and Three-dimensional Animation of Skipjack Behavior as Capture Process during Purse Seining vol.11, pp.2, 2008, https://doi.org/10.5657/fas.2008.11.2.113
  2. Size-selective catch in tropical tuna purse seine fishery in the Eastern Indian Ocean: Assessment on new selectivity model for purse seine net vol.82, pp.3, 2016, https://doi.org/10.1007/s12562-016-0977-9