plSSN : 0374-8111 | elSSN : 2287-8815
plSSN : 0374-8111 | elSSN : 2287-8815
plSSN : 0374-8111elSSN : 2287-8815
Spatio-Temporal Distribution Characteristics of Major Fish Species inthe Jinhae Bay Using Hydro-Acoustics
박근창·이장민1·황태겸1·이형빈2·윤상철3·이경훈4*
국립부경대학교 어업기술안전연구소, 1국립부경대학교 수산물리학전공, 2국립수산과학원 수산자원연구센터, 3국립수산과학원 독도수산연구센터,
4국립부경대학교 해양생산시스템관리학부
This study integrated marine environmental data, fish sampling, and acoustic surveys to examine interannual changes in the distribution and densities of dominant fish species in Jinhae Bay. Monthly temperature and salinity distributions were measured using conductivity-temperature-depth (CTD) profiling, and set-net catch data were analyzed to identify monthly dominant species and species composition. Acoustic data at 38 and 120 kHz were also collected. Using these data, fish schools were detected using a school detection module, while species were classified through the dB-difference method. High water temperatures and low-salinity conditions persisted in Jinhae Bay during the summer of 2024, whereas in 2025, water temperatures were lower, and salinity variability was reduced. Fish sampling survey results revealed a simple species composition in 2024, whereas in 2025, the species composition expanded. In the acoustic survey, schools were most abundant in June 2024 and September 2025. The fish school density levels in 2024 were highest in June, at 2.444 g/m², whereas those in 2025 were highest in September, at 1.890 g/m².
Acoustic survey, Fish school detection, dB-difference, Spatial-temporal distribution, Jinhae Bay