Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
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An Identification of Domestic Habitat and Settlement of the Invasive Exotic Fish Brown Trout, Salmo trutta

침입성 외래어류 브라운송어 Salmo trutta의 국내 서식 및 정착 확인

  • Received : 2022.11.28
  • Accepted : 2022.12.23
  • Published : 2022.12.31
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Abstract

In 2020 and 2022, the habitat of brown trout (Salmo trutta) was investigated in the Soyanggang River in Chuncheon, Gangwon province. As a result of the fish survey, A total of 43 individuals brown trout were identified. The total length of brown trout was widely confirmed from 60 cm or more to less than 10 cm. In January 2020, sperm release and spawn were observed in male and female confirmed at the St. 1. Brown trout were identified stably settled in the Soyanggang River and continues to live. In addition, benthic macroinvertebrates that can act as food sources of brown trout and abundantly inhabited. The riverbed structure is evenly composed of fine gravel and gravel, which constitutes the conditions necessary for habitat and spawning. However, the spawning grounds, spawned eggs and hatched fry have not yet been clearly identified, so continuous research is needed.

2020년과 2022년에 걸쳐 강원도 춘천시 소양강에서 외래종인 브라운송어의 서식을 조사한 결과, 43개체(2.3%)가 서식하는 것이 확인되었다. 2020년 19개체, 2022년 24개체의 서식이 확인되었다. 조사된 개체의 전장이 60 cm 이상의 대형 개체부터 10 cm 미만의 소형 개체까지 폭 넓게 분포하고 있으며, 2020년 1월 St. 1 지점인 세월교에서 확인된 암, 수 개체에서 포란과 방정이 관찰되어 소양강 일대에서 안정적으로 정착하여 꾸준히 서식하고 있음을 확인하였다. 또한 먹이원으로 작용할 수 있는 저서성대형 무척추동물이 풍부하게 서식하고 있으며, 하상구조도 잔자갈과 자갈 등이 고르게 구성되어 있어 서식과 산란에 필요한 조건을 구성하고 있다. 하지만 아직 산란장, 산란된 알, 부화된 치어 등이 명확히 밝혀지지 않아, 지속적인 연구가 필요한 실정이다.

Keywords

Acknowledgement

본 조사는 국립생태원의 외래생물 안전관리 연구사업에 의해 수행되었으며, 특히 생태계교란 생물 모니터링 NIE-법정연구-2022-09의 사업지원과 2022년 위해 외래생물 등의 생태계 위해성 평가 및 안전관리 NIE-수탁연구-2022-09에 의해 수행되었습니다.

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