한국환경생태학회지 (Korean Journal of Environment and Ecology)

  • 제38권3호
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  • Pages.263-276
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  • 2024
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  • 1229-3857(pISSN)
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  • 2288-131X(eISSN)
한국환경생태학회 (Korean Society of Environment and Ecology)
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신갈호의 어류군집 특징 및 어구별 채집 효과 분석

Fish Community Characteristics and the Influence of Fish Sampling Gears in Lake Singal, South Korea

  • 고명훈 (고수생태연구소) ;
  • 한미숙 (고수생태연구소) ;
  • 최광식 (고수생태연구소) ;
  • 곽인실 (전남대학교 해양융합학과) ;
  • 박영석 (경희대학교 생물학과)
  • Myeong-Hun Ko (Kosoo Biology Institute) ;
  • Mee-Sook Han (Kosoo Biology Institute) ;
  • Kwang-Seek Choi (Kosoo Biology Institute) ;
  • Ihn-Sil Kwak (Department of Ocean Integrated Science, Chonnam National University) ;
  • Young-Seuk Park (Department of Biology, Kyung Hee University)
  • 투고 : 2024.03.15
  • 심사 : 2024.05.20
  • 발행 : 2024.06.30
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초록

신갈호의 어류군집 특징 및 어구별 채집 효과를 밝히기 위해 2020년 8월부터 2021년 10월까지 조사를 실시하였다. 채집 어구는 호소에서 일반적으로 사용되고 있는 족대와 투망, 자망, 정치망을 사용하였다. 조사결과, 조사기간 동안 채집된 어류는 7과 18종 3,501개체, 생체량 117,670g이었다. 개체수비 우점종은 참붕어(Pseudorasbora parva, 29.9%), 아우점종은 피라미(Zacco platypus, 25.1%), 다음으로 배스(Micropterus salmoides, 19.3%), 붕어(Carassius auratus, 9.1%), 밀어(Rhinogobius brunneus, 6.1%), 블루길(Lepomis macrochirus, 4.2%) 등의 순으로 우세하였으며, 생체량비 우점종은 붕어(45.1%), 아우점종은 잉어(Cyprinus carpio, 17.4%), 그 다음으로 배스(14.3%), 피라미(7.7%), 떡붕어(C. cuvieri, 7.4%), 참붕어(3.9%) 등의 순으로 우세하였다. 출현종 중 한국고유종은 몰개(Squalidus japonicus coreanus), 점줄종개(Cobitis nalbanti), 얼록동사리(Odontobutis interrupta) 3종이었으며, 외래어종은 배스, 블루길, 떡붕어, 향어(Cyprinus carpio nudus type) 4종으로 이중 배스와 블루길은 생태계교란 생물로 지정된 종이다. 주요종의 평균 체장과 체중을 조사한 결과, 우점종인 참붕어는 체장 60±24.1mm, 체중 4.4±3.42g이었고, 아우점종인 피라미는 체장 82±17.6mm, 체중 10.4±7.27g, 우세종 배스는 체장 96±25.1mm, 체중 24.9±96.02g, 붕어는 체장 125±77.3mm, 체중 168±336.5g이었다. 어구별 조사결과, 족대로 채집된 어류는 3과 8종 302개체 생체량 1,269g, 투망으로 채집된 어류는 4과 11종 948개체 생체량 31,343g, 자망으로 채집된 어류는 4과 13종 682개체 생체량 69,695g, 정치망으로 채집된 어류는 7과 15종 1,569개체, 생체량 15,362g으로 나타났다. 어구별 조사결과를 요약하면, 정치망은 종수와 개체수가, 삼중자망은 생체량이 가장 많았으며, 투망은 연안지대의 종수와 개체수를 채집하는데 강점이 있었으며, 족대는 종수와 개체수, 생체량 모두 가장 적었으나 연안지대의 저서성 소형어류를 채집하는데 강점을 보였다.

Fish community characteristics and the influence of sampling gear were investigated in Lake Singal, South Korea, from August 2020 to October 2021. The employed sampling gears included a kick net, cast net, gill net, and fyke net, which are commonly utilized within the lake. Across three survey stations, a total of 18 fish species from seven families, comprising 3,501 individuals and contributing to a total biomass of 117,670 grams, were identified. Dominance among species was assessed based on individual count and biomass. Pseudorasbora parva was the most abundant, constituting 29.9% of the total catch, followed by Zacco platypus (25.1%) and Micropterus salmoides (19.3%). In terms of biomass, Carassius auratus was predominant, accounting for 45.1%, followed by Cyprinus carpio (17.4%) and M. salmoides (14.3%). Among the sampled species, three were identified as endemic to Korea: Squalidus japonicus coreanus, Cobitis nalbanti, and Odontobutis interrupta. Additionally, four exotic species were recorded, including M. salmoides and Lepomis macrochirus, both classified as invasive alien species, along with C. cuvieri and a variant of Cyprinus carpio (nudus type). Analysis of the average standard length (SL) and body weight (BW) revealed significant size variations among species. P. parva, the dominant species, measured 60 ± 24.1 mm (SL) and weighed 4.4 ± 3.42 g (BW). The subdominant species, Z. platypus, exhibited an SL of 82 ± 17.6 mm and a BW of 10.4 ± 7.27 g. M. salmoides, another dominant species, registered 96 ± 25.1 mm (SL) and 24.9 ± 96.02 g (BW), while C. auratus measured 125 ± 77.3 mm (SL) and weighed 168 ± 336.5 g (BW). In terms of gear-specific performance, the kick net captured eight species from three families, totaling 302 individuals with a biomass of 1,269 g. The cast net was more effective in coastal zones, collecting 11 species from four families, amounting to 948 individuals and 31,343 g of biomass. The gill net yielded the highest biomass, capturing 13 species from four families with 682 individuals weighing 69,695 g. The fyke net recorded the highest species diversity and number of individuals, capturing 15 species from seven families, totaling 1,569 individuals and 15,362 g of biomass. The fyke net proved most efficient in species and individual counts, whereas the gill net was superior for biomass collection. Conversely, the kick net demonstrated effectiveness in collecting small benthic species in coastal areas.

키워드

과제정보

본 결과물은 환경부의 재원으로 한국환경산업기술원 수생태계 건강성 확보 기술개발사업의 지원(과제번호: 2020003050003)으로 수행된 연구임

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