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http://dx.doi.org/10.3796/KSFT.2007.43.4.329

Bycatch of sharks in Korean tuna longline fishery  

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)
Publication Information
Journal of the Korean Society of Fisheries and Ocean Technology / v.43, no.4, 2007 , pp. 329-338 More about this Journal
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.
Keywords
Sharks; Bycatch; Longline fishery; Fin to body weight ratio; Hook number;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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