한국환경생태학회지 (Korean Journal of Environment and Ecology)

  • 제31권1호
  • /
  • Pages.72-80
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  • 2017
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  • 1229-3857(pISSN)
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  • 2288-131X(eISSN)
한국환경생태학회 (Korean Society of Environment and Ecology)
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보길도 소하천 담수어류상 및 군집구조

Freshwater Fish Fauna and Community Structure of the Small Streams in Bogil Island, Korea

  • 한정호 (국립중앙과학관 연구진흥과) ;
  • 박찬서 (국립중앙과학관 연구진흥과) ;
  • 안광국 (충남대학교 생물과학과) ;
  • 백운기 (국립중앙과학관 연구진흥과)
  • Han, Jeong-Ho (Research and Promotion Division, National Science Museum) ;
  • Park, Chan-Seo (Research and Promotion Division, National Science Museum) ;
  • An, Kwang-Guk (College of Bioscience and Biotechnology, Chungnam National University) ;
  • Paek, Woon-Kee (Research and Promotion Division, National Science Museum)
  • 투고 : 2016.11.10
  • 심사 : 2017.02.10
  • 발행 : 2017.02.28
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초록

2015년 6월부터 9월까지 보길도 일대의 소하천의 12개 조사지점에서 담수어류상 및 어류 군집구조를 분석하였다. 조사기간 동안 9과 17속 21종의 어류가 채집되었다. 망둑어과(10종, 1,157개체; 상대풍부도 (RA), 40.9%)가 우점과로 나타났고, 아우점과는 잉어과 (3종, 500개체), 숭어과(2종, 168개체)순으로 나타났다. 버들치(RA 20.7%, 397개체)가 우점종으로 나타났으며, 아우점종은 꾹저구(19.5%, 373개체), 사백어(17.2%, 330개체), 가숭어(8.5%, 163개체) 순으로 나타났다. 보길도에서 채집된 담수어류 중 생활형 구분으로 일차담수어가 9종(42.9%), 주연성 어종 11종(52.4%), 양측회유성 어종 1종(4.8%)으로 나타났다. 한반도 고유종 및 외래어종은 보길도에서 한종도 출현하지 않았다. 군집분석 결과에 따르면, 종 풍부도 지수 및 종 다양도 지수는 다른 지점에 비해 많은 종이 출현한 부황천 최하류 구간(S8)에서 각각 1.831, 1.957로 높게 나타났으며, 중류구간 (S4)에서 0으로 가장 낮게 나타났다. 반면, 우점도 지수는 중류구간(S4) 1로 높게 나타났으며, 최하류 구간(S8)에서 0.17로 낮게 나타났다.

Fish fauna and community structures in freshwater were analyzed in the streams (12 stations) of the Bogil Island from May to September 2015. Total numbers of the sampled species and genus (9 families) were 21 and 17, respectively. Gobiidae was the most dominant taxa, which accounted for 47.6% (10 species) of the total species, and the relative abundance, based on the number of individuals, was 60.4% (1,157 individuals). Subdominant families were three taxa of Cyprinidae (3 species; 500 ind.), Mugilidae (2 species; 168 ind.) and Mugilidae (2 species; 128 ind.). The dominant species, based on the relative abundance, was Rhynchocypris oxycephalus (20.7%) and the subdominant species were Gymnogobius urotaenia (19.5%), Leucopsarion petersii (17.2%) and Chelon haematocheilus (8.5%). These species were composed of upstream-resident fish as well as migratory fishes, so the streams of the Bogil Island had unique characteristics in the fish compositions. Based on all the species sampled, 9 species (42.9%) were primary freshwater fishes, 11 species (52.4%) were peripheral fishes and 1 species (4.8%) was amphidromous fish. Korean endemic species and exotic species were not found in the streams of Bogil Island. According to the analysis of fish community structure, species richness index and species diversity index were highest (1.831, 1.957) in the Site 8 and lowest in the Site 4. In the meantime, the dominance index was highestin the Site 4 (1.00) and lowest in theSite 8 (0.17).

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