Journal of Korea Water Resources Association (한국수자원학회논문집)

Korea Water Resources Association (한국수자원학회)
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An experimental study on the habitat characteristics of largemouth bass

생태교란어종 큰입배스의 서식 특성에 관한 실험적 연구

  • Son, Minwoo (Department of Civil Engineering, Chungnam National University) ;
  • Byun, Jisun (Department of Civil Engineering, Chungnam National University)
  • 손민우 (충남대학교 공과대학 토목공학과) ;
  • 변지선 (충남대학교 공과대학 토목공학과)
  • Received : 2019.06.26
  • Accepted : 2019.10.07
  • Published : 2019.10.31
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Abstract

The aim of this study is to investigate the factors affecting the habitat characteristics of largemouth bass (Micropterus salmoides), which is one of exotic fishes in Korea. Based on field observation, the laboratory experiments were performed in order to investigate the relationship between water temperature and the habitat characteristics of largemouth bass. It was found that largemouth bass preferred a relatively high water temperature in winter and a low temperature in summer. When the small largemouth bass coexisted with large largemouth bass, the separation of habitats depending on the size of each largemouth bass are observed. In the separated habitat areas, it is also observed that the largemouth bass preferred vicinity of the obstacle such as boulder. From the experiments for preference between water temperature and obstacle, it was observed that a primary consideration in habitat selection was obstacles. It was also observed that when light device was turned on, largemouth bass formed a new habitat.

본 연구는 외래어종인 큰입배스(Micropterus salmoides)의 서식특성에 미치는 인자들을 검토한 후, 이를 바탕으로 실험실 실험을 통해 큰입배스의 서식특성에 미치는 인자들의 영향을 살펴보는 것을 목적으로 수행되었다. 큰입배스의 서식특성에 영향을 미치는 인자로 수온이 확인된 현장조사 결과를 바탕으로, 수온에 따른 큰입배스의 서식특성 변화를 실험실 실험을 통해 살펴보았다. 4계절 동안 수행한 실험결과로부터 겨울철에는 비교적 높은 수온을 선호하며, 여름철에는 낮은 수온을 선호하는 것을 확인하였다. 봄철에는 수온의 증가와 관계없이 겨울철에 형성된 서식처에서 산란하는 것으로 나타났다. 서로 다른 크기의 큰입배스가 공존하는 경우 개체의 크기별로 분리된 서식처를 형성하는 것이 확인되었으며, 분리된 서식처 영역 내에서는 장애물 주변을 선호하는 것이 관찰되었다. 장애물과 수온에 대한 배스의 선호도를 살펴본 결과, 수온보다는 장애물을 더욱 선호하는 것으로 나타났다. 또한 서식처 형성 이후에도 태양광을 모사한 조명의 유무에 따라 새로운 서식처를 형성하는 것으로 확인된다.

Keywords

References

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