Understanding long-term changes in fisheries resources is essential for sustainable ecosystem-based management. This study assessed the quantitative and qualitative changes in Korean coastal fisheries from 1971 to 2024 using an ecological group-based approach. Catch data for approximately 130 species were grouped into 21 ecological groups, and the CMSY model was applied to estimate historical biomass and stock status. Future catch and biomass were projected to 2050 under a conservative scenario assuming reduced resilience. Biodiversity and ecosystem structure were evaluated using mean trophic level (MTL), diversity index (DI), and pelagic/demersal fish ratio (P/D) based on both catch and biomass. Historical total catch and biomass declined substantially while future projections suggest stabilization or modest recovery. The proportion of demersal fish decreased over time and is expected to remain low. MTL showed a gradual downward trend in both catch- and biomass-based indicators. DI showed similar fluctuating trends across both datasets. Although P/D values differed in magnitude, both indicators exhibited a consistent pattern of increase followed by decline, indicating ecosystem structural shifts.

서 론
재료 및 방법
    사용자료
    생태 그룹별 자원평가 및 예측
    생물다양성 지표
결 과
    생태 그룹별 어획량 및 자원량의 시계열 변화와 예측 결과
    생물다양성 지표 변화
고 찰
결 론
사 사
References

• 김무진(국립수산과학원 연근해자원과 연구원) | Moo-Jin KIM (Researcher, Division of Coastal Water Fisheries Resources Research Division, National Fisheries Research and Development Institute, Busan 46083, Korea)
• 강희중(국립수산과학원 연근해자원과 연구원) | Heejoong KANG (Researcher, Division of Coastal Water Fisheries Resources Research Division, National Fisheries Research and Development Institute, Busan 46083, Korea) Corresponding author