본 연구에서는 2006년 6월부터 2007년 9월까지 신구저수지의 4개 지점을 선정하여 총 4차례의 어류조사를 실시하였다. 조사결과 붕어와 참붕어 등 내성종이면서 잡식성종이 크게 우점하는 것으로 나타났으며, 민감종은 유입천 지점에 위치한 54를 제외하고 전혀 출현하지 않았다. 잡식성종은 전체의 78%를 차지하여, 트로픽길드의 단순화 현상이 나타나는 것으로 판단되었다. 저수지의 생태건강도는 평균 "보통에서 악화상태 (Fair${sim}$poor)"로 나타나고 있었으며, 저수지의 부영양화와 수질오염이 생태건강도에 큰 영향을 미치는 것으로 판단되었다. 따라서 저수지로의 영양염과 생활하수의 유입 차단이 필요한 것으로 판단되었으며, 향후 지속적인 관리가 필요한 것으로 사료되었다.
For this study, we collected fishes of four times at the four site during June 2006 ${sim}$ September 2007. In the result, the tolerance and omnivore species like a Carassius auratus and Pseudorasbora parva were largely dominated over all, and the sensitive species was not appeared at all except S4 in Shingu reservoir. This reservoir was appeared the simplified of trophic guild was shown in Shingu reservoir. Demonstrating that the omnivore species was occupied 78% of whole. According to the water chemistry data set obtained from the Korea Rural community & Agriculture corporation during $2002{sim}2005$, the Shingu reservoir showed severe eutrophication and water pollution, therefore the increase of primary production and frequent algal blooms had been occurred. On the other hand, ecosystem health of reservoir was appeared "Fair${sim}$Poor", and we judged that eutrophication and water pollution were due to this. Consequently, we thought that interception of nutrients and organic matters from the farmland and village and management of reservoir would be need, after this.
