The fish influx and behavioral properties at a set-net off Goseong, South Korea were investigated using an imaging sonar. As a result, the average influx of fish was 33.9% at day time and 66.1% at night time, respectively, which indicated that a majority of fish entered into a playground in the set-net at night. The fish behavioral properties such as target (fish) length, range, orientation and major-axis angle were examined and compared among survey dates (4, 5, and 6 June 2019) using the statistical analysis tool (analysis of variance, ANOVA). The behavioral properties presented differently sometime of survey dates. This is preparatory study to support fish behavior properties in a set-net. It is expected that more elaborated behavioral information of fishes in the set-net is beneficial for designing and deploying a set-net fishing gear as well as general fish behavior research in the future.

Introduction
Material and Methods
    Acoustic data analysis
    Statistical analysis
Results
    The influx of fish by time
    Target behavioral properties
    Statistical results of target behavioral properties
Discussion
References

• Myounghee KANG(Department of Maritime Police and Production System/Institute of Marine Industry, Gyeongsang National University)
• Jenming LIU(Department of Fishery Production and Management, National Kaohsiung University of Science and Technology, Nanzih District)
• Raja Bidin bin Raja HASSAN(Marine Fishery Resources Development and Management Department, Southeast Asian Fisheries Development Center, Chendering Fisheries Garden)
• Rina FAJARYANTI(Departement of Engineering for Marine Production, Gyeongsang National University)
• Bokyu HWANG(Marine Production System Major, Kunsan National University) Corresponding author