This study quantitatively evaluated the ghost fishing effects caused by lost gillnets and pots through abandoned fishing gear retrieval surveys conducted along the east and south coasts of Korea. The catch efficiency of retrieved gear was compared with commercial gear, and Monte Carlo simulations were employed to estimate ghost fishing rates over time. The results showed that the ghost fishing rate of snow crab gillnets and spring-type whelk pots retrieved from the East Sea were 50.7% and 57.9%, respectively while the drum-type octopus pots from the South Sea showed a ghost fishing rate of 48.3%. These findings indicate that lost fishing gear retains more than half the catch efficiency of commercial gear, and the impacts of ghost fishing can persist over extended periods. Simulation results revealed a sharp decline in ghost fishing rates within the first three months of submersion, followed by a gradual decrease, confirming the long-term impact of ghost gear. When applying time-weighted ghost fishing rates based on soak duration, the estimated loss in 2023 from ghost fishing in gillnet and pot fisheries amounted to approximately KRW 419.9 billion, representing 9.62% of the total production value of coastal and offshore fisheries. These findings emphasize the need for mandatory use of biodegradable gear, regular seabed gear monitoring, and the implementation of traceability and gear identification systems. The study provides scientific evidence for the development of policies and technical standards aimed at mitigating ghost fishing.

서 론
재료 및 방법
    폐어구수거 및 어획물 조사
    유령어업효과 추정
결 과
    폐어구 수거 조사를 기반으로 한 유령어업효과 평가
    선행연구를 기반으로 한 유령어업효과 평가
    몬테카를로 시뮬레이션에 의한 유령어업효과 평가
결 론
사 사
References

• 김성훈(국립부경대학교 해양생산시스템관리학부 교수) | Seonghun KIM (Professor, Division of Marine Production System Management, Pukyong National University, Busan 48513, Korea) Corresponding author