Korean Journal of Ecology and Environment (생태와환경)

The Korean Society of Limnology (한국수생태학회)
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Fish Community Structures and Distribution Characteristics of Fisheries Resources in the Osip Stream and Wangpi Stream, Fishery Resources Protection Areas

내수면 수산자원보호구역 오십천 및 왕피천의 어류군집 구조 및 수산자원 분포특성

  • Received : 2023.03.14
  • Accepted : 2023.03.28
  • Published : 2023.03.31
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Abstract

The objectives of this study were to analyze the fish community structures and distribution characteristics of fisheries resources in the Osip Stream and Wangpi Stream, fishery resources protection areas. For the study, we conducted fish samplings four times in the two streams from April to October 2019. In Osip Stream and Wangpi Stream, we sampled 31 species and 29 species and the dominant species were Zacco platypus (28.6%) and Squalidus multimaculatus(41.7%), respectively. According to the life type of fish species, primary freshwater species were collected 18 species(58.1%) and 21 species(72.4%), and migration fishes were sampled 4 species (12.9%) and 6 species (20.7%) in Osip Stream and Wangpi Stream, respectively. Fisheries resources species showed high relative abundance in June, and the fish biomass was highest in October. As a results of comparing the previous studies with this study, both rivers showed high biodiversity and were found to maintain stable populations of fishes. According to analysis of tolerance guilds, the proportion of tolerant species, based on the number of individuals, was composed of 14.4% and 1.1% in Osip Stream and Wangpi Stream, respectively. This very low ratio of tolerant species confirmed that both streams have very good physiochemical environment conditions. From the above results, it was judged that the fishery resource protection areas of Osip Stream and Wangpi Stream have high ecological function and preservation value. For sustainable use and management of fishery resource protection areas of Osip Stream and Wangpi Stream, it is suggested that biological disturbance management, fish discharge projects considering environmental capacity, efforts to improve the habitat environment, and establishing a fishery resource protection areas management system were necessary as considerations.

본 연구의 목적은 오십천과 왕피천 수산자원보호구역에 서식하는 어류를 대상으로 어류군집특성과 수산자원종의 분포현황을 분석하고 수산자원보호구역의 가치 평가를 위한 기초자료를 제공하기 위함이다. 본 연구에서는 오십천과 왕피천 수산자원보호구역에서 2019년 4월부터 10월까지 시기별로 총 4회 조사하였다. 오십천과 왕피천에서 각각 31종, 29종의 어류가 출현하였고, 우점종은 피라미(28.6%)와 점몰개(41.7%)로 나타났다. 각 하천에서 출현한 어류를 생활형(Life type)에 따라 구분하면, 오십천에서 일차담수어 18종(58.1%), 회유성종 4종(12.9%), 왕피천에서 일차담수어 21종(72.4%), 회유성종 6종(20.7%)으로 확인되었다. 수산자원종은 6월에 개체수가 풍부하였고, 10월에 생체량이 높은 경향을 보였다. 선행연구와 본 연구를 종합하여 분석한 결과, 오십천과 왕피천의 하류에 서식하고 있는 어류는 각각 44종 및 45종으로 높은 생물다양성을 나타내었고, 황어, 은어, 민물검정망둑 등은 안정적인 개체군을 유지하는 것으로 나타났다. 생물지표종 분석결과 내성종 비율은 오십천이 14.4%, 왕피천은 1.1%로 매우 낮은 수준으로 나타나 서식환경의 양호한 상태를 확인할 수 있었다. 다양한 분석을 종합한 결과, 오십천과 왕피천의 수산자원보호구역은 기능 및 보존 가치가 높은 것으로 사료되었으며, 지속적인 이용 및 관리를 위해 생물학적 교란요인에 대한 관리, 환경수용력을 고려한 수산자원 방류사업, 어류의 생활사를 고려한 물리적 서식환경 개선, 장기적인 수산자원조사를 통한 기초자료 구축 등이 중요할 것으로 판단된다.

Keywords

Acknowledgement

본 연구는 국립수산과학원의 연안어장 환경 조사 및 변동 연구(R2023014)의 지원으로 수행되었습니다.

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