Acoustic Doppler current profiler observations of herring movement

Observations were made of over-wintering (December 1997) and migrating (January 1998) Norwegian, spring-spawning herring (Clupea harengus) using a moored 307 kHz acoustic Doppler current profiler (ADCP). The location of herring in ADCP data is identified by regions of volume-backscatter strength greater than −60 dB re 1 m −1 . The presence of herring was verified using net trawls and 38 kHz, EK500 data. While the ADCP cannot make speed measurements of individual fish, the system does provide a measure of the swimming speed and direction of large herring schools. Herring were observed to move both horizontally and vertically: horizontal speeds were from 0 to 50 cm s −1 . Higher speeds were observed during daylight hours for both deployments with somewhat increased activity at both dawn and dusk. At night-time, over-wintering herring demonstrated no well-defined velocity.

[1]  Atle Ommundsen,et al.  A high resolution tidal model for the area around The Lofoten Islands, northern Norway , 2002 .

[3]  J. Blaxter,et al.  The herring swimbladder: loss and gain of gas , 1984, Journal of the Marine Biological Association of the United Kingdom.

[4]  R. Sullivan,et al.  Doppler Techniques Applied to Fisheries Hydroacoustics , 1984 .

[5]  K. Theriault.  Incoherent multibeam Doppler current profiler performance: Part I--Estimate variance , 1986 .

[6]  Kenneth S. Miller,et al.  A covariance approach to spectral moment estimation , 1972, IEEE Trans. Inf. Theory.

[7]  Kenneth G. Foote,et al.  Acoustic abundance estimation of wintering Norwegian spring spawning herring, with emphasis on methodological aspects , 1994 .

[8]  Sonar detection of riverine fish using the pulse pair convariance doppler frequency estimator , 1985, OCEANS '85 - Ocean Engineering and the Environment.

[9]  E. Ona,et al.  Tilt angle distribution and swimming speed of overwintering Norwegian spring spawning herring , 1996 .

[10]  R. Miyamoto,et al.  Acoustic Backscatter from Turbulent Microstructure , 1995 .

[11]  Young Bok Ahn,et al.  Estimation of mean frequency and variance of ultrasonic Doppler signal by using second-order autoregressive model. , 1991, IEEE transactions on ultrasonics, ferroelectrics, and frequency control.

[12]  K. Deines,et al.  Backscatter estimation using Broadband acoustic Doppler current profilers , 1999, Proceedings of the IEEE Sixth Working Conference on Current Measurement (Cat. No.99CH36331).

[13]  D. Holliday,et al.  Doppler Structure in Echoes from Schools of Pelagic Fish , 1974 .

[14]  David A. Demer,et al.  Measurements of three-dimensional fish school velocities with an acoustic Doppler current profiler , 2000 .

[15]  Blair H. Brumley,et al.  Performance of a broad-band acoustic Doppler current profiler , 1991 .

[16]  Roger Lhermitte,et al.  Pulse-to-Pulse Coherent Doppler Sonar Signal Processing Techniques , 1984 .

[17]  E. Firing,et al.  Sunrise swimmers bias acoustic Doppler current profiles , 1992 .

[18]  R. Pinkel.  Acoustic Doppler Techniques , 1980 .

[19]  K. Theriault.  Incoherent multibeam Doppler current profiler performance: Part II--Spatial response , 1986 .

[20]  Rolf J. Korneliussen,et al.  Diel variation in acoustic density measurements of overwintering herring (Clupea harengus L.) , 2000 .

[21]  D. Pincock,et al.  The feasibility of Doppler sonar fish counting , 1978 .

[22]  J. Blaxter,et al.  The Biology of the Clupeoid Fishes , 1982 .

[23]  Sharon L. Smith,et al.  On the use of the acoustic Doppler current profiler to measure zooplankton abundance , 1989 .