Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
권호 표지

Ichthyofauna and Fish Community Structure in Upper Reach of the Nakdong River, Korea

낙동강 상류의 어류상과 군집 구조

  • Chae, Byung Soo (Institute for Phylogenomics and Evolution, Kyungpook National University) ;
  • Kim, Sang Ki (Institute for Phylogenomics and Evolution, Kyungpook National University) ;
  • Kang, Yeong Hoon (Wonhwa Girls' High School) ;
  • Heo, Nam Soo (Wonhwa Girls' High School) ;
  • Park, Jae Min (Department of Biology Education, Kyungpook National University) ;
  • Ha, Heon Uk (Department of Biology Education, Kyungpook National University) ;
  • Hwang, Ui Wook (Institute for Phylogenomics and Evolution, Kyungpook National University)
  • 채병수 (경북대학교 계통진화유전체학연구소) ;
  • 김상기 (경북대학교 계통진화유전체학연구소) ;
  • 강영훈 (원화여자고등학교) ;
  • 허남수 (원화여자고등학교) ;
  • 박재민 (경북대학교 생물교육과) ;
  • 하헌욱 (경북대학교 생물교육과) ;
  • 황의욱 (경북대학교 계통진화유전체학연구소)
  • Received : 2015.03.06
  • Accepted : 2015.05.20
  • Published : 2015.06.30
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Abstract

Freshwater fish fauna and community structure were investigated at 44 stations in upper reach of the Nakdong river, Korea from March to October 2014. During the surveyed period 42 species and 4 types belonging to 34 genera and 14 families were collected. In this collection fishes of Cyprinidae were 17 species and 4 types, most numerous possessing 43.2% of all. There were 17 Korean endemic species including Kichulchoia multifasciata, 3 endangered species such as Koreocobitis naktongensis, Lethenteron reissneri and Brachymystax lenok tsinlingensis and 2 exotic species such as Lepomis macrochirus and Micropterus salmoides. Fish species transferred from other native rivers were 9 species including Hemibarbus mylodon, Coreoleuciscus slpendidus Han river type, Opsariichthys uncirostris amurensis, Iksookimia koreensis and Liobagrus andersoni. Dominant species based on the number of individuals was Rhynchocypris oxycephalus (21.44%) and sub-dominant species were Zacco koreanus NE type (18.55%). The community analysis revealed that the structure of fish community in upper reach of the Nakdong river was very stable and diverse in having diversity 1.101, evenness 0.670, dominance 0.400 and species richness 4.454. Fish community was divided into 5 groups based on similarity indices among surveyed stations such as uppermost, upper I, upper II, mid-upper, middle reach group.

2014년 3월부터 10월까지 낙동강 상류에서 44개 조사 지점에 대하여 어류상을 조사한 결과, 총 14과 34속 42종 4형의 어류가 확인되었다. 채집된 어류 중 잉어과 어류가 17종 4형 (43.2%)으로 가장 많았으며, 다음은 미꾸리과 어류가 6종(13.6%)이었다. 한반도 고유종은 Kichulchoia multifasciata 등의 17종이었다. 멸종위기종은 Koreocobitis naktongensis, Lethenteron reissneri 및 Brachymystax lenok tsinlingensis의 3종이었으며, 외래종은 Lepomis macrochirus와 Micropterus salmoides의 2종이었다. 국내의 다른 하천에서 옮겨진 이입종은 Hemibarbus mylodon, Coreoleuciscus slpendidus Han river type, Opsariichthys uncirostris amurensis, Iksookimia koreensis, Liobagrus andersoni 등의 9종이었다. 개체수를 기준으로 한 우점종은 Rhynchocypris oxycephalus (21.44%), 아우점종은 Z. koreanus NE형 (18.55%)이었다. 어류 군집 분석을 실시한 결과 영강 전체는 다양도 1.101, 균등도 0.670, 우점도 0.400, 종풍부도 4.454로 나타나 다양하고 안정된 어류 군집을 이루고 있었다. 조사 지점 사이의 유사도지수를 이용하여 수지도를 작성한 결과 최상류, 상류I, 상류II, 중상류 및 중류 집단의 5집단으로 구분할 수 있었다.

Keywords

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