We aimed to assess the behavior characteristics of fish on an artificial reef using hydroacoustic techniques. The acoustical survey was conducted with a 200 kHz dual beam transducer while fishing on the stone combination reef of Uljin. A school of fish were detected on the artificial reef before sunset and floated on the artificial reef at 30 minutes after sunset. The density (Nautical Area Scattering Coefficient, NASC) of fish that floated on the artificial reef after sunset was about 600 m2/nmi2; similar observations (about 50 m2/nmi2 or less) were noted after 19:00 hours. Fish caught by fishing on the artificial reef were Sebastes schlegeli, Hexagrammos otakii, Sebastes thompsoni, and Conger myriaster. Resultantly, we demonstrated that hydroacoustic techniques are useful for detecting behavior characteristics of fish in the artificial reef. Such results can be used for basic data to estimate the install effect of the artificial reefs.

• 윤은아 | Eun-A YOON
• 황두진 | Doo-Jin HWANG Corresponding author
• 김호상(전남대학교 해양기술학부) | Ho-Sang KIM (Division of Marine Technology, Chonnam National University, Yeosu 550-749, Korea)
• 이승주(전남대학교 해양기술학부) | Seung-Joo LEE (Division of Marine Technology, Chonnam National University, Yeosu 550-749, Korea)
• 이경선(전남대학교 해양기술학부) | Kyung-Seon LEE (Division of Marine Technology, Chonnam National University, Yeosu 550-749, Korea)