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

The Korean Society of Fisheries and Ocean Technology (한국수산해양기술학회)
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Evaluation of Korean distant water tuna fisheries in the Western and Central Pacific Ocean using ecosystem-based fishery risk assessment

중서부태평양해역 다랑어어업의 생태계기반 어업 위험도 평가

  • KWON, Youjung (Distant Water Fisheries Resources Research Division, National Institute of Fisheries Science) ;
  • LIM, Jung-hyun (Distant Water Fisheries Resources Research Division, National Institute of Fisheries Science) ;
  • LEE, Mi Kyung (Distant Water Fisheries Resources Research Division, National Institute of Fisheries Science) ;
  • LEE, Sung Il (Distant Water Fisheries Resources Research Division, National Institute of Fisheries Science)
  • 권유정 (국립수산과학원 원양자원과) ;
  • 임정현 (국립수산과학원 원양자원과) ;
  • 이미경 (국립수산과학원 원양자원과) ;
  • 이성일 (국립수산과학원 원양자원과)
  • Received : 2020.10.13
  • Accepted : 2020.11.20
  • Published : 2020.11.30
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Abstract

Tuna fisheries were applied to an integrated ecosystem-based fishery risk assessment method using indexes of target species status, inhabited species in a target ecosystem, habitat quality and socio-economic benefit of affected fisheries. This study suggested more effective and efficient management measures to break away from traditional management methods, such as limitation of catch and fishing effort. The results presented that the objective risk index (ORIS) on sustainability of bigeye and yellowfin tunas by purse seine fishery was estimated high due to the high catch ratio of small fishes. The ORIs of biodiversity (ORIB) and habitat quality (ORIH) of purse seine fishery were also estimated at a high level from using fish-aggregating devices (FAD). However, due to skipjack tuna's high catches, the ORI of socio-economic benefit (ORIE) was estimated at a very low level. Due to the high bycatch rate, ORIB was high, and ORIS and ORIH were evaluated at a low level in longline fishery. Due to strengthern of fishing restrictions and increase of fishing costs, the ORIE was assessed to be very high. The ecosystem risk index (ERI) for two tuna fisheries was assessed low, but the overall FAD management by purse seine fishery is necessary at the ecosystem level.

Keywords

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