한국어류학회지 (Korean Journal of Ichthyology)

  • 제33권4호
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  • Pages.287-296
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  • 2021
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  • 1225-8598(pISSN)
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  • 2288-3371(eISSN)
한국어류학회 (The Ichthyological Society of Korea)
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아산호와 충주호의 삼각망에서 채집된 어류 종 조성 및 강준치 (Erythroculter erythropterus) 개체군의 전장-체중 관계 분석

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

  • 허민아 (한국수산해양공학연구소) ;
  • 안희춘 (한국수산해양공학연구소) ;
  • 박민수 (한국수산해양공학연구소) ;
  • 양영준 (한국수산해양공학연구소) ;
  • 이완옥 (한국수산해양공학연구소)
  • 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)
  • 투고 : 2021.12.07
  • 심사 : 2021.12.23
  • 발행 : 2021.12.31
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초록

아산호와 충주호에서 2021년 6~9월 사이에 삼각망에서 채집된 어류의 종 조성과 강준치(Erythroculter erythropterus) 개체군의 전장 - 체중 상관관계를 조사하였다. 조사기간 동안 아산호에서는 6과 13종 4,977개체, 충주호에서는 8과 18종 2,436개체가 채집되었다. 아산호의 우점종은 생체량 및 개체수에서 모두 강준치로 각각 498,424 g (84.5%), 4,470 (89.8%)이었으며, 충주호의 우점종 또한 강준치로, 생체량 301,818 g (77.5%), 개체수 1,327 (54.5%)이었다. 우점종인 강준치의 전장분포도 분석을 통해 연령구조를 추정하였으며, 아산호에서는 만 1~2년생의 출현비율이 높아 개체군의 성장 가능성이 크고, 충주호에서는 만 2년생 이상의 고 연령군의 출현이 대부분을 차지하여 비교적 개체군의 성장이 억제될 것으로 사료된다. 강준치 개체군의 전장-체중 상관관계를 분석한 결과, 아산호와 충주호에서의 b 값은 각각 3.06, 3.04, 비만도(K) 기울기 값은 각각 0.000128, 0.000051로 모두 양의 생육상태를 보였다. 조사시기별 비만도 기울기 값은, 6월이 가장 높았고 산란으로 인해 7월에는 낮아졌으며 9월까지도 영양 상태를 회복되지 못하고 음의 기울기가 나타났다.

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.

키워드

과제정보

본 연구는 해양수산부의 재원으로 해양수산과학기술진흥원의 어업현장의 현안해결 지원사업의 지원을 받아 연구되었습니다 (1525011389).

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