음향도플러유향유속계를 이용한 꽁치어군의 유영속도 측정
Swimming speed measurement of Pacific saury(Cololabis saira) using Acoustic Doppler Current Profiler
0
조회
0
다운로드
2
인용
0
참고문헌
키워드
초록
This study was performed to estimate the swimming velocity of Pacific saury (Cololabis saira) migrated offshore Funka Bay of Hokkaido using an acoustic Doppler current profiler (OceanSurveyor, RDI, 153.6kHz) established in T/S Ushio Maru of Hokkaido University, in September 27, 2003. The ADCP's doppler shift revealed as the raw data that the maximum swimming velocity was measured 163.0cm/s, and its horizontal swimming speed and direction were 72.4±24.1 cm/s, 160.1°±22.3° while the surrounding current speed and direction were 19.6±8.4cm/s, 328.1°±45.3°. To calculate the actual swimming speed of Pacific saury in each bins, comparisons for each stratified bins must be made between the mean surrounding current velocity vectors, measured for each stratified bin, and its mean swimming velocity vectors, assumed by reference(threshold>-70dB) and 5dB margin among four beams of ADCP. As a result, the actual averaged swimming velocity was 88.6cm/s and the averaged 3-D swimming velocity was 91.3cm/s using the 3-D velocity vector, respectively.
Abstract
This study was performed to estimate the swimming velocity of Pacific saury (Cololabis saira) migrated offshore Funka Bay of Hokkaido using an acoustic Doppler current profiler (OceanSurveyor, RDI, 153.6kHz) established in T/S Ushio Maru of Hokkaido University, in September 27, 2003. The ADCP's doppler shift revealed as the raw data that the maximum swimming velocity was measured 163.0cm/s, and its horizontal swimming speed and direction were 72.4±24.1 cm/s, 160.1°±22.3° while the surrounding current speed and direction were 19.6±8.4cm/s, 328.1°±45.3°. To calculate the actual swimming speed of Pacific saury in each bins, comparisons for each stratified bins must be made between the mean surrounding current velocity vectors, measured for each stratified bin, and its mean swimming velocity vectors, assumed by reference(threshold>-70dB) and 5dB margin among four beams of ADCP. As a result, the actual averaged swimming velocity was 88.6cm/s and the averaged 3-D swimming velocity was 91.3cm/s using the 3-D velocity vector, respectively.
참고문헌 (8)
- Deines, K.L., "Backscatter estimation using broadband acoustic Doppler current profilers", Proceedings of the IEEE Sixth Working Conference on Current Measurement, pp.5~ (1999)
- Demer, D.A., "Measurements of three dimensional fish school velocities with an acoustic Doppler current profiler", Fish. Res, 47, pp.201~214 (2000)
- Dickson, K.A., "Effect of temperature on sustained swimming performance and swimming kinematics of the chub mackerel Scomber japonicus", J. of Exp. Bio, 205, pp.969~980 (2002)
- Holliday, D.V., "Doppler structure in echoes from schools of pelagic fish", J. Acoust. Soc. Am, 55(6), pp.1313~1322 (1974)
- Plimpton, P.E., "ADCP velocity errors from pelagic fish schooling around equatorial moorings", Journal of Atmospheric and Oceanic Technology, 14, pp.1212~1223 (1997)
- RD Instruments, "Acoustic Doppler Current Profiler, Principles of Operation a Practical Primer", pp.51~ (1996), RD Instruments
- RD Instruments, "Field service technical paper 001 (FST 001) Broadband ADCP advanced principles of operation 01 October", pp.15~ (1996), RD Instruments
- Zedel, L., "Acoustic Doppler current profiler observations of herring movement", ICES J. Mar. Sci, 60, pp.846~859 (2003)