Korean Journal of Ecology and Environment (생태와환경)

The Korean Society of Limnology (한국수생태학회)
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Study of the Fish Community Structure and Inhabiting Status of the Endangered Species Gobiobotia macrocephala and G. brevibarba in the Seom River, Korea

섬강의 어류군집 및 멸종위기종 꾸구리(Gobiobotia macrocephala)와 돌상어(G. brevibarba)의 서식현황

  • Ko, Myeong-Hun (Department of Marine Biotechnology, Soonchunhyang University) ;
  • Moon, Shin-Joo (Department of Marine Biotechnology, Soonchunhyang University) ;
  • Bang, In-Chul (Department of Marine Biotechnology, Soonchunhyang University)
  • 고명훈 (순천향대학교 자연과학대학 해양생명공학과) ;
  • 문신주 (순천향대학교 자연과학대학 해양생명공학과) ;
  • 방인철 (순천향대학교 자연과학대학 해양생명공학과)
  • Received : 2011.02.15
  • Accepted : 2011.05.23
  • Published : 2011.06.30
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Abstract

The fish community structure and inhabiting status of the endangered species Gobiobotia macrocephala and G. brevibarba were investigated at 10 stations in the Seom River, Korea from spring to autumn in 2010. During the survey, 37 species belonging to 10 families were found as inhabitants. A dominant species was Zacco platypus (36.2%), subdominant species were G. macrocephala (13.2%) and G. brevibarba (12.2%), and predominant species were Coreoleuciscus splendidus (8.1%) and Rhinogobius brunneus (4.9%). In addition, 18 species were endemic species to Korea; G. brevibarba and G. macrocephala were endangered species. The similarity index based on species composition and numbers clearly separated fish communities in the Seom River according to main sections, i.e., upper section (St. 1~3), middle section (St. 4~6) and lower section (St. 7~10). Dominance index gradually decreased toward the lower section, while diversity and species richness index gradually increased toward the downstream section. G. macrocephala resided in a fast-running downstream riffle with pebble and cobble substratum, while G. brevibarba inhabited the entire riffle with cobble substratum.

섬강의 어류 군집구조 및 멸종위기어종 꾸구리(Gobiobotia macrocephala)와 돌상어(G. brevibarba)의 서식현황을 알아보기 위하여 2010년에 10개 지점을 선정하여 계절별로 조사하였다. 총 출현한 어종은 10과 37종이었고, 우점종은 피라미(Zacco platypus, 36.2%), 아우점종은(13.2%)와 돌상어(12.2%), 그 다음으로 쉬리(Coreoleuciscus splendidus, 8.1%)와 밀어(Rhinogobius brunneus, 4.9%) 등의 순으로 우세하게 출현하였다. 출현종 중 한국고유종은 18종(48.6%)이였으며, 환경부 멸종위기종은 꾸구리와 돌상어 2종이 출현하였다. 지점별 출현한 어종을 근거로 유사도 분석을 한 결과 상류(St. 1~3)와 중류(St. 4~6), 하류(St. 7~10)로 잘 구분되었으며 하류로 갈수록 우점도 지수는 대체로 낮아지고, 다양도 지수와 종 풍부도 지수는 대체로 높아지는 경향을 보였다. 멸종위기 어종인 꾸구리는 섬강 하류의 자갈과 돌이 쌓인 여울에서 서식하였고, 돌상어는 전구간에 쌓인 여울지역에 비교적 높은 비율로 서식하고 있었다.

Keywords

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