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

The Korean Society of Fisheries and Ocean Technology (한국수산해양기술학회)
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Bycatch of sharks in Korean tuna longline fishery

한국다랑어연승어업에 있어서 상어류의 부수어획

  • Moon, Dae-Yeon (Distant-Water Fisheries Resources Team, National Fisheries Research and Development Institute) ;
  • Hwang, Seon-Jae (Distant-Water Fisheries Resources Team, National Fisheries Research and Development Institute) ;
  • An, Doo-Hae (Distant-Water Fisheries Resources Team, National Fisheries Research and Development Institute) ;
  • Kim, Soon-Song (Distant-Water Fisheries Resources Team, National Fisheries Research and Development Institute)
  • 문대연 (국립수산과학원 해외자원팀) ;
  • 황선재 (국립수산과학원 해외자원팀) ;
  • 안두해 (국립수산과학원 해외자원팀) ;
  • 김순송 (국립수산과학원 해외자원팀)
  • Published : 2007.11.30
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Abstract

Data collected by on-board observers and from experimental surveys during 2004-2006 were analyzed to figure out the status of shark bycatch in Korean tuna longline fishery. Results obtained from 10 surveys indicated that 14, 13 and 1 species of shark were incidentally caught in Korean tuna longline fishery operated in the Pacific, Indian and Atlantic (Mediterranean) Ocean, respectively, and that shark bycatch accounted for about 29-31% of the total catch. Sharks brought aboard were processed in 3 ways; out of 1,127 sharks observed, 575 sharks (51.0%) were discarded after finning, 299 sharks (26.5%) were stored frozen after finning for future use and 253 sharks (22.4%) were released into the sea immediately after caught. The fin to body weight ratio of sharks was estimated to be about 4.7% which is similar to the guideline of 5% established by the international fisheries organizations. The underestimate of shark bycatch in Korean tuna longline fishery was significant because it was general practice that fishermen on-board did not count the discarded shark as a catch.

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References

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