논문 상세보기
pp.86-97
Fishways, particularly installed at the estuary, have a purpose to encourage fluent migration for migratory fishes, as well as amphidromous and even freshwater species. Not choosing the laborious traditional method of using traps, we assessed the efficiency of the two fishways installed at the west and east barrage of the Nakdong River estuarine barrage respectively, by analyzing the videos recorded through automatic monitoring system. We randomly selected 30 videos monthly at each fishways and identified what kind of fishes were using the fishways and categorised their behaviour such as size, time and whether they passed the monitoring system or not. As a result, a total 8 families 14 species were recorded by monitoring system, with the most dominance of Erythroculter erythropterus (Relative Abundance: 59.5%), followed by Micropterus salmoides (R.A: 19.9%) and Mugil cephalus (R.A: 9.9%). The monitoring system can capture passing fishes during night but the number of appearances of fish species at each hour of a day indicated significant diurnal activities (p<0.05). When fishes pass the monitoring system, approximately 70% of them passed through the monitoring device, while 17% of them showed fallback movement. Our finding indicates that species-specific characteristics of each fish are well represented through video monitoring method. In order to maximise advantages of using video monitoring, it is necessary to consider the installation point properly so that the monitoring system does not interfere with the movement of fish. Also, the utilisation of AI technology in the future is also necessary.
서 론
재료 및 방 법
1. 조사지 개황
2. 모니터링 장비
3. 분석 방법
결 과
1. 어종별 낙동강 하구 어도 이용 현황
2. 어도를 이용하는 주요 어종별 어도 이용 시간대
3. 어종별 어도 내 행동패턴
고 찰
1. 어도 이용 어류 확인
2. 하굿둑 어도를 이용하는 어류의 행동
3. 향후 자동 모니터링 개선점
적 요
REFERENCES
APPENDICE
Table S1. Fish abundance observed at both fishways.
Table S2. Fish abundance observed at fishway in the West barrage.
Table S3. Fish abundance observed at fishway in the East barrage.
