[논문]서부인도양 해역 다랑어어업의 생태계기반 어업 위험도 평가

하영신; 이성일; 권유정

doi:10.5657/kfas.2023.0449

서부인도양 해역 다랑어어업의 생태계기반 어업 위험도 평가
Ecosystem-based Fishery Risk Assessment of Tuna Fisheries in the Western Indian Ocean 원문보기

한국수산과학회지 = Korean journal of fisheries and aquatic sciences, v.56 no.4, 2023년, pp.449 - 461

하영신 (국립수산과학원 원양자원과) , 이성일 (부경대학교 해양생산시스템관리학부) , 권유정 (국립수산과학원 원양자원과)

Abstract ▼ AI-Helper

The aim of this study was to conduct an ecosystem-based fishery risk assessment of tuna fisheries in the Western Indian Ocean. We selected gillnet, purse seine, hand line, baitboat, and longline fisheries as the target fisheries method, and selected longtail tuna (Thunnus tonggol), narrow-barred Spanish mackerel (Scomberomorus commerson), kawakawa (Euthynnus affinis), skipjack tuna (Katsuwonus pelamis), yellowfin tuna (T. albacares), bigeye tuna (T. obesus), albacore tuna (T. alalunga) and swordfish (Xiphias gladius) as the target species. The risk score for the size at the first capture in sustainability objective was high, especially, for the purse seine and baitboat fisheries using the fish aggregating devices (FADs). The risk score for the bycatch in the biodiversity objective was high for the gillnet fishery, and the gillnet fisheries using FADs showed high risks for the habitat quality objective due to the loss of the fishing gears. With regards to the socio-economic benefits objective, the risk score of the sales profits was low due to high sales of the tuna fisheries. The ecosystem risk score in the Western Indian Ocean was estimated to be moderate, although management is required for some of the indicators that have high-risk scores.

주제어

표/그림 (8)

그림 Fig. 1. Map showing Western and Eastern Indian Ocean areas designated by the FAO. Western Indian Ocean is the target ecosystem of this study. Source: https://iotc.org/about-iotc/competence.
그림 Fig. 2. The catch composition of major species by fishery in the Western Indian Ocean, 2012-2021. LOT, Longtail tuna; COM, Narrow-barred Spanish mackerel; KAW, Kawakawa; SKJ, Skipjack tuna; YFT, Yellowfin tuna; BET, Bigeye tuna; ALB, Albacore tuna; SWO, Swordfish.
표 Table 1. The target species and fisheries for assessing the ecosystem- based fishery risk for the Western Indian Ocean
표 Table 2. The data by objective, indicator, target and limit reference points (TRP and LRP) used for the ecosystem-based fishery risk assessment
그림 Fig. 3. Estimated risk score (RS) by fishery and species of the Western Indian Ocean. LOT, Longtail tuna; COM, Narrow-barred Spanish mackerel; KAW, Kawakawa; SKJ, Skipjack tuna; YFT, Yellowfin tuna; BET, Bigeye tuna; ALB, Albacore tuna; SWO, Swordfish.
그림 Fig. 4. Estimated objective risk index (ORI) by fishery and species of the Western Indian Ocean. S, Sustainability; B, Biodiversity; H, Habitat quality; E, Socio-economic benefit. LOT, Longtail tuna; COM, Narrow-barred Spanish mackerel; KAW, Kawakawa; SKJ, Skipjack tuna; YFT, Yellowfin tuna; BET, Bigeye tuna; ALB, Albacore tuna; SWO, Swordfish.
그림 Fig. 5. Estimated species risk score (SRI) by fishery of the Western Indian Ocean. LOT, Longtail tuna; COM, Narrow-barred Spanish mackerel; KAW, Kawakawa; SKJ, Skipjack tuna; YFT, Yellowfin tuna; BET, Bigeye tuna; ALB, Albacore tuna; SWO, Swordfish.
그림 Fig. 6. Estimated fishery and ecosystem risk scores (FRI and ERI) of the Western Indian Ocean. Art GN, Artisanal gillnet; Ind GN, Industrial gillnet; PS, Purse seine; HL, Handline; BB, Baitboat; LL, Longline.

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