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http://dx.doi.org/10.35399/ISK.33.2.6

Species Composition and Assemblage Structure of Fish Collected by Set Net at the Coastal Waters of Goseong in Gangwon-do, Korea  

Lee, Soo Jeong (East Sea Fisheries Research Institute, National Institute of Fisheries Science)
Yang, Jae-Hyeong (East Sea Fisheries Research Institute, National Institute of Fisheries Science)
Seo, Young Il (East Sea Fisheries Research Institute, National Institute of Fisheries Science)
Kim, Jin-Koo (Department of Marine Biology, Pukyong National University)
Publication Information
Korean Journal of Ichthyology / v.33, no.2, 2021 , pp. 95-106 More about this Journal
Abstract
In order to understand the seasonal variations of species composition of fish in the Goseong, middle East Sea of Korea, we surveyed fish fauna using set net during 2 years. In this study, a total of 77 taxa belonging to 40 families were collected and 75 species were identified. The dominant family were Tetraodontidae and Pleuronectidae, and the dominant species were Arctoscopus japonicus, Konosirus punctatus, Stephanolepis cirrhifer, Thamnaconus modestus, and Trachurus japonicus. The results of the hierarchical clustering using the number of individuals of collected species showed that they are divided into three seasonal groups: Group A (Jan.~Apr.), Group B (May~Jun., Nov.~Dec.), Group C (Jul.~Oct.). The sea surface temperature (SST) was higher than the results of previous studies in winter and spring, and species composition in spring have changed from cold-water species to the warm-water species, recently. The species composition has become similar to the that of southern Gangwon-do regions (Samcheok and Gangneung) of the previous studies. The species diversity of family Tetraodontidae has increased, which is estimated to have an effect on increase in SST and the quantity of entering the East Sea. Therefore, we assumed that the change of species composition is related to the extension of northern distribution limits and survival temperature, and abundant preys. Therefore, it is necessary that an efficient resource management policy as well as the ways of commercially use of migratory warm-water fish, rapidly.
Keywords
Fish; species composition; assemblage structure; set net; Goseong; Korea;
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