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http://dx.doi.org/10.3796/KSFOT.2020.56.4.277

Characteristics on bycatch in Korean tuna purse seine fishery associated with FAD in the Indian Ocean by scientific observer programs  

LEE, Sung Il (Distant Water Fisheries Resources Research Division, National Institute of Fisheries Science)
KIM, Doo Nam (Fisheries Resources Research Center, National Institute of Fisheries Science)
LEE, Kyounghoon (Division of Fisheries Science, Chonnam National University)
Publication Information
Journal of the Korean Society of Fisheries and Ocean Technology / v.56, no.4, 2020 , pp. 277-291 More about this Journal
Abstract
In order to understand characteristics on bycatch of Korean tuna purse seine fishery, especially operations associated with Fish Aggregating Device (FAD) in the Indian Ocean, we conducted analyses related to bycatch by school association type (unassociated school, FAD associated school and log associated school) using the data collected by scientific observers from 2016 to 2018. The FAD used by Korean tuna purse seine fishery in the Indian Ocean was a drifting FAD, which belongs to non-entangling FADs according to the category proposed by the International Seafood Sustainability Foundation (ISSF). The target species of Korean tuna purse seine fishery are skipjack, yellowfin and bigeye tunas, accounting for 99% of the total catch. The ratio of bycatch was 0.97% in total catch and the discard accounted for less than 1%, indicating that most catch was retained on board. In terms of bycatch ratio by school association type, it accounted for 0.12% for unassociated school, 1.09% for FAD associated school and 1.25% for log associated school. As for the catch proportion of shark species by school association type, it accounted for 0.01% for unassociated school, 0.11% for FAD associated school and 0.10% for log associated school, which showed that unassociated school type was the lowest to affect bycatch of non-target and shark species. Given the proportion of bycatch compositions, however, it is considered that FAD associated school of Korean tuna purse seine fishery has less caught bycatch species of non-target and shark, compared to other fleets operating in the Indian Ocean.
Keywords
Korean tuna purse fishery; Fish aggregating device (FAD); Bycatch; Indian Ocean;
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Times Cited By KSCI : 3  (Citation Analysis)
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