In this study, we aimed to determine the seasonal distribution and biomass of fish in Samcheok marine ranching area (MRA) of Republic of Korea using the scientific echosounder. Fish trap and gillnets were used to identify fish species in the survey area, and dB-difference method was used to estimation the spatio-temporal distribution and density of fish. The results showed that the dominant species in Samcheok marine ranching area were Chelidonichthys spinosus, Sebastes inermis, Hexagrammos otakii and Tribolodon hakonensis. The spatio-temporal distribution of fish showed that fish had a relatively higher distribution at night than during the day. In addition, the density of fish by season was highest at night in July at 34.22 g/m 2 and lowest in April at 0.42 g/m 2 .

서 론
재료 및 방법
    조사시기 및 해역
    조사 시스템 및 자료 수집
    데이터 분석
    음향을 이용한 밀도 추정
결과 및 고찰
    어구를 이용한 어획 조사 결과
    어류의 시·공간 분포
    어류의 밀도 추정
결 론
사 사

• 이정관(전남대학교 수산과학과 학생) | Jungkwan LEE (Student, Division of Fisheries Science, Chonnam National University, Yeosu 59626, Republic of Korea)
• 박근창(부경대학교 수산물리학과 학생) | Geunchang PARK (Student, Department of Fisheries Physics, Pukyong National University, Busan 48513, Republic of Korea)
• 오선영(부경대학교 수산물리학과 학생) | Sunyoung OH (Student, Department of Fisheries Physics, Pukyong National University, Busan 48513, Republic of Korea)
• 이사라(부경대학교 수산물리학과 학생) | Sara LEE (Student, Department of Fisheries Physics, Pukyong National University, Busan 48513, Republic of Korea)
• 오우석(부경대학교 저탄소해양생산기술연구소 연구원) | Wooseok OH (Scientist, Institute of Low-Carbon Marine Production Technology, Pukyong National University, Busan 48513, Republic of Korea)
• 황두진(전남대학교 해양생산관리학과 교수) | Doo Jin HWANG (Professor, Division of Marine production Management, Chonnam National University, Yeosu 59626, Republic of Korea)
• 이경훈(부경대학교 해양생산시스템관리학부 교수) | Kyounghoon LEE (Professor, Division of marine production system management, Pukyong National University, Busan 48513, Republic of Korea) Corresponding author