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Fishing investigation of trawl fisheries in sea mount of central northern Pacific

북태평양 중부 해산어장에 있어서 저층 트롤의 어획실태

  • Kim, Young-Seuing (Distant Water Fisheries Resource Team, National Fisheries Research and Development Institute) ;
  • On, Taeg-Yun (Distant Water Fisheries Resource Team, National Fisheries Research and Development Institute) ;
  • Cho, Sam-Kwang (Fisheries Resource and Environment Team, West sea Fisheries Research Institute, NFRDI) ;
  • Choi, Seuk-Kwan (Distant Water Fisheries Resource Team, National Fisheries Research and Development Institute) ;
  • Kon, Jeong-Lag (Distant Water Fisheries Resource Team, National Fisheries Research and Development Institute) ;
  • Yang, Won-Seuk (Distant Water Fisheries Resource Team, National Fisheries Research and Development Institute)
  • 김영승 (국립수산과학원 해외자원팀) ;
  • 오택윤 (국립수산과학원 해외자원팀) ;
  • 조삼광 (국립수산과학원 서해수산연구소 자원환경팀) ;
  • 최석관 (국립수산과학원 해외자원팀) ;
  • 고정락 (국립수산과학원 해외자원팀) ;
  • 양원석 (국립수산과학원 해외자원팀)
  • Published : 2005.08.31

Abstract

This study was conducted in order to the experiment of bottom trawl fisheries in the sea mount of central northern pacific($30^{\circ}-40^{\circ}N$, $170^{\circ}-175^{\circ}E$), during the period of July 1 to August 25, 2004 by commercial trawl ship. Fishing experiment was carried out by bottom trawl, with the codend of 110mm mesh size. The number of 101 test fishing was done in the sea mount of central northern pacific during 56 days and the total catches were 198,593kg as 18 fish species, and CPUE/day and catches/day were 8.3 hours towing time and 3,546kg. Catch ratio according to each fishing ground was higher with the order of B, C, and E, and catches for B was 7,171.0kg during the towing time of 13.2 hours. Main target species were Pseudopentaceros richardsoni and Beryx splendens, there was 14.9% of damage ratio for fishing gears on catching the target fishes inhabiting on the rough sea bottom. Catches by water depth was the order of 300m below, 301-350m, 451-500m and 351-400m. It is thought that there was no problem on the mesh size because most of fishes caught from the experimental fishing was 30cm over.

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