Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
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Evaluation on the Restoration and Conservation of Natural Monument Species, Hemibarbus mylodon (Pisces: Cyprinidae: Gobioninae) in Geumgang River Upstream Area

금강 상류역의 천연기념물 어름치의 복원 평가 및 보전방안

  • Ha-Yun Song (Inland Fisheries Research Institute, National Institute of Fisheries Science) ;
  • Yeong-Ho Kwak (Inland Fisheries Research Institute, National Institute of Fisheries Science) ;
  • Chang-Gi Hong (Inland Fisheries Research Institute, National Institute of Fisheries Science) ;
  • Su-Jeong Gwon (Inland Fisheries Research Institute, National Institute of Fisheries Science) ;
  • Jeong-Bae Kim (Inland Fisheries Research Institute, National Institute of Fisheries Science) ;
  • Wan-Ok Lee (The Korean Association for Conservation of Freshwater Fish)
  • 송하윤 (국립수산과학원 중앙내수면연구소) ;
  • 곽영호 (국립수산과학원 중앙내수면연구소) ;
  • 홍창기 (국립수산과학원 중앙내수면연구소) ;
  • 권수정 (국립수산과학원 중앙내수면연구소) ;
  • 김정배 (국립수산과학원 중앙내수면연구소) ;
  • 이완옥 (한국민물고기보존협회)
  • Received : 2024.06.25
  • Accepted : 2024.08.05
  • Published : 2024.08.31
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Abstract

The distribution status of the nature monument species, Hemibarbus mylodon, was investigated from 2021 to 2024 in Geumgang River and Mujunamdae Stream (a tributary of the Geumgang River). In 2021 to 2023, five individuals from Gemgang River upstream were collected by Geumsan-gun, Chungchangnam-do. In 2021 to 2024, 1,592 induviduals juvenile from seven sites were collected by surveying 15 sites from Mujunamdae Stream. The main habitat of juvenile was about 0.3~1.5 meters water deep, 0.14~0.16 meters per second in the middle-upper stream of rock and sand bottom with slow rapids and pools. The age groups for H. mylodon estimated by the frequency distribution of total length in after spawning season (May) to October indicated the 10~65 mm is 0-year old, 75~90 mm is 1-year old group. In addition, over the 120 mm group is 2-years old, the 190~250 mm is more than 3-years old group. In 2024, we identified 35 spawning place from six sites were sites were collected by surveying 15 sites. Spawning place at the river bottom were top of the rapids, 30~60 cm (mean 48.2 cm) water deep, and the place was covered with stone and gravel, water velocity was 0.13~0.34 (mean 0.25 m/sec) meter per second. The spawning place size of the gravel piles was as follows: length 35~48 cm (mean 40.7 cm), width 25~37 cm (mean 34.5), and height 5~12 cm (mean 8.6 cm). Thus, H. mylodon reintroduced to Mujunamdae Stream has successfully settled down and increase in abundance within the natural habitat.

2021년부터 2024년까지 금강과 무주남대천에서 천연기념물종인 어름치 Hemibarbus mylodon의 분포현황을 조사하였다. 2021년부터 2023년까지 충청남도 금산군의 금강 상류에서 5마리를 채집하였다. 2021년부터 2024년까지 무주남대천 15개의 정점을 조사하여 7개 정점에서 치어 1,592개체를 채집하여 서식을 확인하였다. 치어의 주요 서식지 특성은 유속이 완만한 여울 또는 소 (pool)가 형성된 무주남대천 중상류 지역으로 하천바닥에 암석과 모래가 깔린 수심 0.3~1.5 m, 유속 0.14~0.16 m/s로 나타났다. 산란 후 5월부터 10월까지 전장빈도분포법을 이용해 추정한 어름치 연령군은 체장 10~65 mm는 0세, 75~90 mm는 만 1세 연령군으로 추정하였다. 120 mm 이상 그룹은 2세, 190~250 mm 이상 그룹은 3세 이상으로 추정하였다. 2024년에는 무주남대천 15개의 조사 정점 중 6개 정점에서 총 35개의 어름치 산란탑을 확인하였다. 어름치 산란장소는 여울이 시작되는 여울 상부로 수심은 30~60 cm(평균 48.2 cm)로 돌과 자갈로 덮여 있었으며, 유속은 0.13~0.34 m/sec (평균 0.25 m/sec)였다. 산란탑의 크기는 길이 35~48 cm(평균 40.7 cm), 폭 25~37 cm(평균 34.5 cm), 높이 5~12 cm(평균 8.6 cm)로 나타났다. 따라서 무주남대천에 재도입된 어름치는 성공적으로 자연서식지내 정착 및 개체수가 증가하였다.

Keywords

Acknowledgement

본 연구는 2024년도 국립수산과학원 수산연구사업(R2024011)의 연구비 지원으로 수행되었으며, 본 논문의 질적 향상을 위해 도움 주신 두 분의 심사위원께 감사드립니다.

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