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A Study on the Characteristics of Freshwater Fish Community in the Small Streams in Geogeumdo Island, Korea

거금도 내 소하천의 담수어류군집 특성에 관한 연구

  • Received : 2019.10.23
  • Accepted : 2019.11.26
  • Published : 2019.12.31

Abstract

The freshwater fish fauna for the whole water system of Geogeumdo Island was surveyed at a total 10 sites from March 2018 to February 2019. During the surveyed period, 13 species belonging to 5 families and 4 orders were collected. Cyprinidae (68.84%) and Gobiidae (18.21%) were the dominant family, and the dominant species was Zacco temminckii (53.71%), and the subdominant species was Rhynchocypris oxycephalus (10.78%). Kichulchoia brevifasciata (1.27%) that endangered species were found in this study, but the habitat was confirmed in one site in Sinpyeongcheon compared to previous literature. Three endemic species of Korea were found in this island such as Iksookimia hugowolfeldi (5.07%), Liobagrus somjinensis (2.99%) and K. brevifasciata (1.27%). According to analysis of fish community structure based on average diversity, evenness index, dominance and richness indices in Geogeumdo Island were 1.666, 0.649, 0.645 and 1.713, respectively.

2018년 3월부터 2019년 2월까지 10개 지점의 거금도 전 수계 담수 어류상을 조사하였으며, 조사 기간 동안 4목 5과 13종이 채집되었다. 조사 결과 잉어과 Cyprinidae (68.84%)와 망둑어과 Gobiidae (18.21%)가 우세하였으며, 우점종은 갈겨니 Zacco temminckii (53.71%), 아우점종은 버들치 Rhynchocypris oxycephalus (10.78%)로 나타났다. 본 조사에서 멸종위기 야생생물 I급인 좀수수치 Kichulchoia brevifasciata (1.27%)가 출현하였으나 이전의 문헌과 비교하여 서식지가 줄어 신평천 일부 지점에서만 서식이 확인되었다. 또한 거금도의 한국 고유종으로는 남방종개 Iksookimia hugowolfeldi (5.07%), 섬진자가사리 Liobagrus somjinensis (2.99%), 좀수수치 K. brevifasciata (1.27%) 3종이 확인되었다. 군집지수를 분석한 결과 다양도 지수는 1.666, 균등도 지수 0.649, 우점도 지수 0.645, 종 풍부도 지수 1.713으로 나타났다.

Keywords

References

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