Korean Journal of Ecology and Environment (생태와환경)

The Korean Society of Limnology (한국수생태학회)
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Fish Fauna Using Fishway on Six River in Korea

국내 6개 하천에서 어도를 이용하는 어류상

  • 김동억 (국립금오공과대학교 환경공학과) ;
  • 박제철 (국립금오공과대학교 환경공학과) ;
  • 황종서 (사단법인 한국수생태복원협회) ;
  • 김동섭 (한국수자원공사) ;
  • 이완옥 (사단법인 한국수생태복원협회) ;
  • 황길순 (사단법인 한국수생태복원협회)
  • Received : 2020.07.13
  • Accepted : 2020.08.10
  • Published : 2020.09.30
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Abstract

The use of fishway has been investigated up to 2~9 years, continuously each month and over the long term that installed in 6 domestic rivers. The fish's use of fishway has been investigated as direct collection by trap in exit section of the fishway. The population structure of fish using 6 fishway and the fish that live in the river showed difference. About 2 to 7 species of fish took possession of more than 80% of total use of fish in fishways. This seems to be not the results of attraction flow in fishway but specialized result of physiology characteristic followed by species of fish. In addition, the distribution of fish species using fishway was different with the fishways installed in river. This difference seems to be consequence of the place that of the river and fishway types. Generally, the fish species were less and had high ratio of home migratory fish in vertical slot type fishway, which shows relatively fast velocity of water flow. This analysis result of major fish species using fishway can be used in planning fishway and to choose major targeted species for the planning.

국내 주요 6개 하천의 보에 설치된 어도에서 2~9년 이상 매월 연속적이고 장기적으로 어류의 어도이용을 조사하였다. 어류의 어도 이용은 어도 출구부에서 trap에 의한 직접 채집 방법으로 조사하였다. 6개 지점의 어도를 이용하는 어류와 하천에 서식하는 어류의 군집구조는 차이를 보였다. 어류의 어도 이용은 대략 2~7종이 전체의 80% 이상을 차지하였다. 이것은 어류의 어도 이용이 종적 생리특성에 따라 특화된 결과로 보이며, 단순히 어도에서의 흐름에 따라 어도 이용을 유인하는 경우는 많지 않은 것으로 보인다. 또한, 6개 지점에서 어도 이용 어류의 분포는 하천의 위치 및 보에 설치된 어도형식에 따라 달랐다. 이러한 차이는 해양 및 하구로부터 이동한 회유종의 분포 여부에 의한 결과로 보인다. 또한, 어도형식에 따른 수리특성의 차이도 영향을 주었다. 대체로 어도 내부에서 상대적으로 빠른 유속을 보이는 버티컬슬롯식 어도에서 어도이용 종수가 적고 유영능력이 좋은 어류의 비율이 높았다. 어도를 이용하는 주요 어류의 분석결과는 어도 계획과 이를 위한 주요 대상종의 선정에 활용될 수 있을 것이다.

Keywords

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