This study classified environmental regimes at inferred fishing locations of the Korean large purse seine fishery by integrating automatic identification system-based fishing activity data from Global Fishing Watch with public marine environmental data. Temperature and salinity from GOFS3.1 and gridded NIFS serial oceanographic observations, together with MODIS-Aqua chlorophyll a, were matched to fishing locations from 2021 to 2023. Correlation, principal component, and variance inflation factor analyses identified temperature and salinity at 30 m depth and chlorophyll a as representative variables. Seasonal Gaussian mixture models identified five clusters for each environmental dataset, which were integrated into four meta-groups using Ward’s hierarchical clustering. The meta-groups represented low-temperature/high-chlorophyll a, stable, high-temperature/low-salinity, and high-temperature/high-salinity conditions. Spatial similarity between datasets varied among meta-groups, with Pearson correlations of 0.438-0.643 and Top 10% Jaccard indices of 0.303-0.524. Major distribution areas were broadly consistent around southeastern Korea, the Korea Strait, and Jeju Island. These results support the complementary use of public marine environmental data for classifying environmental conditions at fishing locations. Since species-specific catch data were unavailable, the meta-groups should be interpreted as environmental regimes rather than species-specific fishing grounds.

서 론
재료 및 방법
결과 및 고찰
    대표변수 선정
    조업환경 군집 도출
    메타그룹별 환경 특성과 공간분포
결 론
사 사
References

• 유영재(국립부경대학교 대학원 해양생산관리학부 수산물리학전공 대학원생) | Youngjae YU (Student, Division of Marine Production Management (Major in Fisheries Physics), Pukyong National University, Busan 48513, Korea)
• 손도형(한국해양수산연수원 오션폴리텍수산팀 실습선 교수) | Dohyung SON (Professor, Training Ship, Oceanpolytech Fisheries Team, Korea Institute of Maritime and Fisheries Technology, Busan 49111, Korea)
• 김남구(경상국립대학교 해양경찰시스템학과 교수) | Nam-Gu KIM (Professor, Department of Maritime Police and Production System, Gyeongsang National University, Tongyeong 53064, Korea)
• 류경진(국립부경대학교 해양생산시스템관리학부 교수) | Kyung-Jin RYU (Professor, Division of Marine Production System Management, Pukyong National University, Busan 48513, Korea)
• 김형석(국립부경대학교 해양생산시스템관리학부 교수) | Hyung-Seok KIM (Professor, Division of Marine Production System Management, Pukyong National University, Busan 48513, Korea) Corresponding author