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http://dx.doi.org/10.11614/KSL.2021.54.4.384

Fish Distribution Research Using Fishfinder at Fishery Area in the Cheongpyeong Reservoir  

Baek, Seung-Ho (EcoResearch incorporated)
Park, Sang-Hyeon (EcoResearch incorporated)
Song, Mi-Young (Inland Fisheries Research Institute, National Institute of Fisheries Science)
Kim, Jeong-Hui (EcoResearch incorporated)
Publication Information
Korean Journal of Ecology and Environment / v.54, no.4, 2021 , pp. 384-389 More about this Journal
Abstract
This study was conducted on October 23, 2020 at the Cheongpyeong Reservoir located in Seorakmyeon, Gapyeong-gun, Gyeonggi-do, and analyzed the horizontal and vertical distribution patterns of fish based on data obtained using fishfinder. The total surface area of fishfinder survey conducted was 782,853 m2, and where the water depth (WD) ranges from 10 m to 12 m is widest which 31.7% of total surface area. As a result of the heat map analysis, fish density was highest at right bank under the Gapyeong-bridge, but there was no specific pattern in horizontal distribution of fish. As a result of vertical distribution of fish analysis, 86.6% of fishes are observed at below 6 m of the fish depth (FD, distance from water surface to fish). As a result of the relative height (RH, water depth-distance from bottom to fish ratio) analysis, there was a tendency that fishes are distributed in near surface area more as the WD increased. This tendency could have various reasons such as water temperature gradient along the water depth, and further studies are required for detailed explanation.
Keywords
acoustic; echo-sounder; fish density; inland fishery; sonar;
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