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http://dx.doi.org/10.35399/ISK.33.4.9

Species Composition of Fishes Collected by Fyke Net and Length-Weigth Relationships of Skygager (Erythroculter erythropterus) in Asan Lake and Chungju Lake  

Heo, Min Ah (Korea Institute of Fisheries and Ocean Engineering)
An, Heui Chen (Korea Institute of Fisheries and Ocean Engineering)
Park, Min Su (Korea Institute of Fisheries and Ocean Engineering)
Yang, Yeong Jun (Korea Institute of Fisheries and Ocean Engineering)
Lee, Wan-Ok (Korea Institute of Fisheries and Ocean Engineering)
Publication Information
Korean Journal of Ichthyology / v.33, no.4, 2021 , pp. 287-296 More about this Journal
Abstract
This study was conducted to investigate the species composition collected by fyke net and characteristics of the Erythroculter erythropterus population in the Asan Lake and Chungju Lake from June to September, 2021. The collected fish in Asan lake were identified as 4,977 individuals of 13 species from a total of six families and in Chungju lake were identified as 2,436 individuals of 18 species from a total of eight families. The dominant species in Asan lake, both the individuals and biomass were E. erythropterus with 4,470 (89.8%) and 498,424g (84.5%). The dominant species in Chungju lake, both the individuals and biomass were E. erythropterus with 1,327 (54.5%) and 301,818 g (77.5%). The results of the community analysis showed that a dominant index value of Asan lake was 0.93, higher than 0.71 of Chungju lake, and a diversity, evenness, and richness index value of Chungju lake were higher than of Asan lake. The frequency distribution of the total length analysis of the E. erythropterus population showed the appearance rate of 1~2 year olds was high in Asan lake, and the appearance rate of more than 2 years old were high in Chungju lake. The length-weight analysis of E. erythropterus in Asan Lake and Chungju Lake showed a regression coefficient b of 3.06 and 3.04, a condition factor (K) of 0.000128 and 0.000051 with a positive slope. This study could be served as baseline data for assessing habitat characteristics based on the species composition of fishes, and identifying health conditions of E. erythropterus in Asan Lake and Chungju Lake, artificial lakes.
Keywords
Erythroculter erythropterus; species composition; length-weight relationships; condition factor;
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