수중 음향 측정방식을 이용한 금강 중,하류의 눈불개 이동성 평가 = Evaluation of the Movement Pattern of Squaliobarbus curriculus Inhabiting in the Mid-Lower Part of Geum River Using Acoustic Telemetry

다국어 초록 (Multilingual Abstract)

Visual monitoring is hard to apply on fish because they are living in a water system. To overcome this problem, acoustic telemetry, which is effective for underwater monitoring, is often used for studying fish behaviors, such as movement distance, route and patterns. In this study, in order to monitor the movement pattern of Squaliobarbus curriculus (family Cyprinidae), we used acoustic telemetry and identified the home range and movement distances. A total of nine individuals were released at two different locations: one is at the estuary barrage (Sc1~~3) and the other is at the lower part of Baekjae Weir (Sc4~~9), located in Geum River. Approximately, a 70 km section from the estuary barrage was investigated. Fish, which were released at the estuary barrage, utilized up to 12.7 km upstream as home range from the release site. At the lower part of Baekjae Weir, most of the fish moved and stayed within a 7.2 km downstream area, except for Sc6, which moved 53.4 km (linear maximum distance from release site) downstream from the release site. Relatively small sized fish (Sc7~~9) did not show any movement. Accumulated movement distance significantly correlated with the standard length of S. curriculus (rs=0.715, p=0.03). Moreover, the standard length of moving fish was significantly larger than that of not moving fish (Mann- Whitney U test, p=0.024). Therefore, the movement distance of S. curriculus has been correlated with fish size; movement distance was increased with the standard fish length. Although the sample size of monitored fish was small, various meaningful data were collected by acoustic telemetry. Consequently, this technique could be a method available for effectively monitoring the behavior and ecology of native Korean and endemic species.

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