Korean Journal of Ecology and Environment (생태와환경)

The Korean Society of Limnology (한국수생태학회)
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Species Composition of Fish in Yedang Reservoir and Characteristics by Sampling Gears

예당호 어류 종조성과 채집도구에 따른 어류 특성

  • Tae-Sik Yu (Fisheries Science Institute, Chonnam National University) ;
  • Chang Woo Ji (Fisheries Science Institute, Chonnam National University) ;
  • Yong Jun Kim (Department of Ocean Integrated Science, Chonnam National University) ;
  • Gun Hee Oh (Department of Ocean Integrated Science, Chonnam National University) ;
  • Young-Seuk Park (Department of Biology, Kyung Hee University) ;
  • Ihn-Sil Kwak (Fisheries Science Institute, Chonnam National University)
  • Received : 2022.11.09
  • Accepted : 2022.12.13
  • Published : 2022.12.31
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Abstract

Sampling gears for collecting fish are diverse, and the community of fish varies according to the selection and characteristics of the sampling gears. The present study compared the characteristics of fish communities in Yedang reservoir using four sampling gears (kick net, cast net, gill net, and fyke net). The kick net and cast net were inefficient in collecting the number of individuals. However, they increased the species diversity of fish inhabiting the waterfront. Although not many individuals were collected, the gill net mainly collected large fish. The largest number of individuals was collected in the fyke net, and the dominance was high due to the high species selectivity. Through Self-Organizing Map (SOM) analysis, large fish were collected in the gill net, whereas small fish were collected in the fyke net. The characteristics and efficiency of the fish differed depending on the sampling gears. It is expected that researchers will need to use it appropriately according to the characteristics of the sampling gears when investigating the fish community.

어류 채집도구는 다양하며, 채집도구의 선택과 특성에 따라 채집되는 어류의 군집에 차이가 나타난다. 본 연구는 예당호에서 4개의 채집도구 (족대, 투망, 자망 및 삼각망)를 이용하여 어류 군집을 조사하고 비교하였다. 족대와 투망은 개체수를 채집하는 데 효율적이지 않았으나, 수변부에 서식하는 어류의 종 다양성이 높았다. 자망의 경우, 체장이 길거나 등지느러미 극조가 존재하는 어류가 주로 채집되었다. 삼각망에서는 가장 많은 개체수가 채집되었으며, 높은 종 선택성으로 인해 우점도가 높아지는 것으로 나타났다. NMDS 분석에서 족대, 투망 및 자망 간 채집되는 어류의 뚜렷한 차이가 나타났다. 비지도학습법인 Self-organizing map (SOM) 분석으로 자망에서는 체장이 큰 어류가 채집되는 반면 삼각망에서는 체장이 작은 어류가 채집되는 패턴 특성을 밝혀내었다. 채집도구에 따라 어류의 생태적인 특성과 종 다양성 효율이 다르게 나타났으며, 어류 군집조사 시 서식환경과 목적에 부합되는 채집도구를 선택할 필요성이 있다. 또한, 서식처 유형에 적합한 채집도구의 표준화로 연구자 간의 차이를 줄이는 방법의 제시가 요구된다.

Keywords

Acknowledgement

본 결과물은 한국연구재단의 지원(NRF-2018R1A6A1A03024314)과 환경부의 재원으로 한국환경산업기술원 수생태계 건강성 확보 기술개발사업의 지원(2020003050003, 2021003050001)을 받아 연구되었습니다.

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