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

The Korean Society of Fisheries and Ocean Technology (한국수산해양기술학회)
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Characteristics on bycatch in Korean tuna purse seine fishery associated with FAD in the Indian Ocean by scientific observer programs

과학옵서버 조사에 의한 인도양 수역 한국 다랑어 선망선 FAD 조업의 부수어획실태

  • 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)
  • 이성일 (국립수산과학원 원양자원과) ;
  • 김두남 (국립수산과학원 수산자원연구센터) ;
  • 이경훈 (전남대학교 수산과학과)
  • Received : 2020.09.22
  • Accepted : 2020.10.26
  • Published : 2020.11.30
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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.

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References

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