Korean Journal of Environment and Ecology (한국환경생태학회지)

Korean Society of Environment and Ecology (한국환경생태학회)
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Fluctuation of Fish Community and Inhabiting Status of Introduced fish in Gangeungnamdae Stream, Korea

강릉남대천의 어류군집 변화 및 도입어종의 서식 현황

  • Received : 2015.09.16
  • Accepted : 2015.10.13
  • Published : 2015.10.30
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Abstract

The fish community and inhabiting status of introduced fish were surveyed at nine stations of Gangeungnamdae stream from September 2013 to May 2014. A total of 36 species of fourteen families were collected from the survey stations and among them, Pungitius sinensis was identified as endangered species. There were nine Korean endemic species (25%) including Coreoleuciscus splendidus. Dominant species were Rhynchocypris steindachneri (St. 1), Zacco koreanus (St. 2, 4, 5, 6), Ladislabia taczanowskii (St. 3)), Zacco platypus (St. 7, 8) and Tribolodon hakonensis (St. 9). Of the 11 introduced species fishes in Gangeungnamdae stream, L. taczanowskii, Pungtungia herzi, Coreoleuciscus splendidus, Squalidus gracilis majimae, Pseudogobio esocinus, Rhynchocypris kumgangensis, Z. platypus, Z. koreanus, Koreocobitis rotundicaudata, Liobagrus andersoni and Coreoperca herzi were released from Han river water zone in Korean. Rapidly expanded population and distribution of introduces fishes were Z. platypus, Z. koreanus, P. herzi and S. gracilis majimae, but L. taczanowskii, C. splendidus, R. kumgangensis were not rapidly expanded population. Settlement but very small population fishes were C. herzi and L. andersoni. When reduced 3% fishes of relative abundance with previous data (1973), R. steindachneri, Orthrias toni, Iksookimia pacifica, Plecoglossus altivelis, P. sinensis and Gymnogobius urotaenia, and R. steindachneri was most reduced from 56.1% to 12.9%.

강릉남대천의 어류군집 변화와 도입된 어종의 서식실태를 파악하기 위해 9개 지점에서 2013년 9월에서 2014년 5월에 걸쳐 실시하였다. 채집된 어류는 총 14과 36종 이었고, 멸종위기종에 속하는 가시고기(Pungitius sinensis) 1종이 출현하였다. 한반도 고유종은 쉬리(Coreoleuciscus splendidus)을 포함하여 9종으로 고유화빈도가 25.0% 이었다. 우점종은 버들개(Rhynchocypris steindachneri, St. 1), 참갈겨니(Zacco koreanus, St. 2, 4, 5, 6), 새미(Ladislabia taczanowskii, St. 3), 피라미(Zacco platypus, St. 7, 8), 황어(Tribolodon hakonensis, St. 9) 이었다. 한강수계에서 강릉남대천으로 도입된 어종은 새미, 돌고기(Pungtungia herzi), 쉬리(Coreoleuciscus splendidus), 긴몰개(Squalidus gracilis majimae), 모래무지(Pseudogobio esocinus), 금강모치(Rhynchocypris kumgangensis), 피라미, 참갈겨니, 새코미꾸리(Koreocobitis rotundicaudata), 퉁가리(Liobagrus andersoni), 꺽지(Coreoperca herzi) 11종이었다. 개체군과 분포역이 급격히 확대되는 도입어종은 피라미, 참갈겨니, 돌고기, 긴몰개 등이었으며 정착되어 안정적인 개체군을 형성하였으며 서식지가 급격히 확대되지 않은 어종은 새미, 쉬리, 버들개 등 이었다. 정착하였으나 개체군이 매우 적은 어종은 꺽지와 퉁가리이었다. 1973년에 비해 개체수 구성비가 3%이상 감소된 어종은 버들개, 종개(Orthrias toni), 북방종개(Iksookimia pacifica), 은어(Plecoglossus altivelis), 가시고기, 꾹저구(Gymnogobius urotaenia) 등 이었고 버들개는 56.1%에서 12.9%로 가장 많이 감소하였다.

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References

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