Korean Journal of Environmental Biology (환경생물)

Korean Society of Environmental Biology (한국환경생물학회)
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Fish fauna and growth characteristics of Zacco platypus populations in Seomgang River

섬강의 어류상 및 피라미 개체군의 생육특성 분석

  • Ji Hye Bae (Department of Smart Life Science, College of Life Science & Engineering, Sangji University) ;
  • Ju Hyoun Wang (Department of Smart Life Science, College of Life Science & Engineering, Sangji University) ;
  • Hwang Goo Lee (Department of Smart Life Science, College of Life Science & Engineering, Sangji University)
  • 배지혜 (상지대학교 생명과학과) ;
  • 왕주현 (상지대학교 생명과학과) ;
  • 이황구 (상지대학교 생명과학과)
  • Received : 2023.12.01
  • Accepted : 2024.02.08
  • Published : 2024.03.31
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Abstract

The goal of this study was to provide basic data necessary for managing fish in the Seomgang River by confirming diversity of fish species in the Seomgang River and determining the degree of change in fish species through a comparison with earlier related work. Growth rate, obesity level, and temporal and spatial reproductive capacities were analyzed to determine growth characteristics of dominant species. Fish fauna and structure of the fish community were surveyed at three different time points from October of 2020 to August of 2021 at eight sites. In addition, growth characteristics of Zacco platypus from June of 2021 to July of 2022 at four sites were determined. A total of 3,999 individuals, 43 species, and ten families of fish were identified. Among these species, 19 (44.19%) were Korean endemic species and four (9.30%) were endangered species. The dominant species was Z. platypus. Pungtungia herzi was identified as a subdominant species. An analysis of length-weight relationships and condition factor (k) of Z. platypus confirmed a good state of growth. As a result of a frequency analysis of the total length, the life cycle of the Z. platypus population living in the Seomgang River was found to be stable. According to gonadosomatic index (GSI) analysis, the spawning season of Z. platypus was estimated to occur after May, consistent with the literature.

섬강은 국가하천으로 강원도 횡성군 태기산 일대에서 발원한다. 본 연구는 섬강 어류상의 종다양성을 확인하고, 과거 문헌비교를 통해 어류상의 변화 정도를 파악하여 섬강의 어류 및 어족자원 관리에 있어 필요한 기초자료를 제공하고자 하였다. 또한 우점종의 생육특성을 파악하기 위하여 성장도 및 비만도 분석과 시·공간적인 생식능력을 분석하고자 연구를 수행하였다. 어류상 파악을 위해 2020년 10월부터 2021년 8월까지 8개 지점에서 총 3회 조사를 수행하였으며, 피라미의 생육특성을 파악하기 위해 2021년 6월부터 2022년 7월까지 4개 지점에서 총 7회 조사를 수행하였다. 총 10과 43종 3,999개체가 채집되었으며, 우점종은 피라미로 조사되었다. 한국고유종은 각시붕어, 묵납자루, 줄납자루, 쉬리 등 총 19종으로 44.19%의 고유종 빈도로 분석되었으며, 멸종위기야생생물은 묵납자루, 새미, 꾸구리, 돌상어 등 총 4종 (9.30%)이 출현하였다. 섬강은 높은 고유종 비율을 나타내며, 다양한 멸종위기야생생물이 서식하여 양호한 서식환경을 나타내고 있는 것으로 조사되었다. 문헌비교 시지점 간의 차이로 인하여 11종이 과거와 비교해 출현하지 않았으나 9종이 추가로 확인되었다. 피라미의 전장-체중 상관도 분석 결과 모든 지점에서 회귀계수 b값은 3.0 이상, 비만도 지수는 양의 값을 보여 양호한 생육상태를 유지하고 있는 것으로 나타났다. 전장빈도 분석 결과에서는 당년생부터 만 3년생 이상의 개체가 출현하여 안정적인 생활사가 유지되고 있었다. GSI 분석 결과 섬강의 수온이 20℃ 이상을 유지하는 5월부터 산란하는 것으로 추정되었으며, 피라미 개체군은 생육상태가 양호하고, 안정적인 생활사를 유지하는 것으로 확인되었다. 섬강에서는 종다양성이 증가했으며, 우점종, 다양한 법정보호종, 고유종 등 어류상이 안정적인 것으로 보아 서식지가 잘 보존되고 있는 것으로 판단된다. 그러나 외래종이 유입되고 있어 이에 대한 방안이 필요할 것으로 생각된다.

Keywords

Acknowledgement

본 연구는 상지대학교 대학원의 지원을 받아 수행되었습니다.

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