Korean Journal of Environmental Biology (환경생물)

Korean Society of Environmental Biology (한국환경생물학회)
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Efficiency Analysis of the Ice Harbor Type Fishway Installed at the Gongju Weir on the Geum River using Traps

Trap을 이용한 공주보 아이스하버식 어도의 효과분석

  • Lee, Jin-Woong (Department of Biology Education, Kongju National University) ;
  • Yoon, Ju-Duk (Biological Resource Center, Kongju National University) ;
  • Kim, Jeong-Hui (Bureau of Basic Ecological Research, National Institute of Ecology) ;
  • Park, Sang-Hyeon (Department of Biology Education, Kongju National University) ;
  • Baek, Seung-Ho (Department of Biology Education, Kongju National University) ;
  • Yoon, Jo-Hee (Geum River Environment Research Center, National Institute of Environmental Research) ;
  • Jang, Min-Ho (Department of Biology Education, Kongju National University)
  • 이진웅 (공주대학교 생물교육과) ;
  • 윤주덕 (공주대학교 생물자원연구센터) ;
  • 김정희 (국립생태원 기초생태연구본부) ;
  • 박상현 (공주대학교 생물교육과) ;
  • 백승호 (공주대학교 생물교육과) ;
  • 윤조희 (국립환경과학원 금강물환경연구소) ;
  • 장민호 (공주대학교 생물교육과)
  • Received : 2014.10.24
  • Accepted : 2015.03.15
  • Published : 2015.03.31
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Abstract

To overcome the stream fragmentation and blockage of migration of fishes by dams and weirs, fishways are commonly installed. However, limited studies were conducted for effectiveness and suitability of fishways installed in Korean streams. In this study, we investigated fish usages (by time periods, locations and months) of the Ice Harbor type fishway installed in the Gongju weir using traps. The monitoring were monthly conducted from June to October, 2012. The number of individuals which used fishway in September and October decreased than in June to August. Although no statistical significance was identified, many numbers of species and individuals were occurred at the trap installed at the left end of fishway than others. Fishes of more diverse size classes occurred at this trap as well. The number of collected individuals and water level of weir were positively correlated though they showed low correlation coefficient. Conversely, occurrence rate of fishes smaller than 70 mm of total length decreased with increasing water level of weir. fishway usage time of fish were different depends on ecological characteristics of each species. Various sizes of fishes can use fishway for their upstream migration. These results are useful for establishing management and evaluation plans of Ice Harbor type fishway in S. Korea.

댐과 보의 건설로 인한 하천의 단절 및 어류의 이동 문제를 해결하기 위해 다수의 어도를 건설하고 있다. 하지만 이에 대한 어도 효율성 평가나 적합성에 대한 연구는 상당히 제한적으로 이루어지고 있다. 따라서 본 연구는 2012년 6월부터 10월까지 매달 1회씩 trap을 이용하여 공주보에 설치된 아이스하버식 어도에서 시기별, 시간대별, 어도 위치별 어도 이용 차이를 분석하였다. 연구 결과, 6~8월보다 9~10월에 어도를 이용하는 종 및 개체가 감소하였다. 그리고 어도 좌안 측면이 통계적으로 유의하지 않지만 많은 종 및 개체가 출현하였고, 또한 다른 위치보다 다양한 크기의 개체들이 출현하였다. 상류수위와 채집된 소상 어류 개체수는 양의 상관성을 나타내고 있었다. 그러나 일평균 상류수위가 증가할수록 전장 70 mm 이하 소형개체들의 출현율이 감소하는 경향이 나타났다. 어도 내 시간대별 이동은 종별 생태적인 특성에 따라 차이를 보였다. 전체적으로 크기가 작은 개체부터 큰 개체까지 다양한 크기의 어류가 어도를 이용했다. 이러한 결과는 국내에 건설된 아이스하버식 어도관리 및 평가에 도움이 될 것으로 판단된다.

Keywords

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