In this study, the seasonal distribution was surveyed using acoustic in the coastal waters around nuclear power plants. Acoustic surveys were conducted in June, September, December 2022, and March 2023 in the coastal waters of Uljin-gun. According to the results of this study, zooplankton were distributed at the depths from 0 m to 50 m in the waters around nuclear power plants. Zooplankton appeared in summer (June), autumn (September), and spring (March). In the survey area, fish were distributed at the depths from 25 m to 190 m, appearing in the summer (June), autumn (September), winter (December) and spring (March). The SV of zooplankton appearing in the survey area ranged from -98.0 dB to -78.0 dB, and it exhibited a one-class in the frequency distribution of SV. The SV of fish appearing in the survey area ranged from -36.0 dB to -35.0 dB and -98.0 dB to -53.0 dB, and it exhibited two-class in the frequency distribution of SV.

서 론
재료 및 방법
    조사해역 및 조사장비
    음향자료 처리방법
결과 및 고찰
    해양생물의 계절별 에코그램
    동물플랑크톤과 어류의 계절별 SV 출현빈도
    동물플랑크톤의 계절별 지리적 수평 분포
결 론
사 사
References

• 민은비(전남대학교 수산과학과 학생) | Eun-Bi MIN (Student, Department of Fisheries Science, Chonnam National University, Yeosu 59626, Korea)
• 강태종(전남대학교 수산과학과 학생) | Tae-Jong KANG (Student, Department of Fisheries Science, Chonnam National University, Yeosu 59626, Korea)
• 손영태((주)지오시스템리서치 책임연구원,) | Yeongtae SON (Researcher, Department of ocean information analysis, Geosystem Research Corporation, Seoul 04092, Korea)
• 황두진(전남대학교 해양생산관리학과 교수) | Doo-Jin HWANG (Professor, School of Marine Technology, Chonnam National University, Yeosu 59626, Korea) Corresponding author