Acoustic estimates of demersal fish using a dual‐beam transducer in laboratory and field
- 1 October 1984
- journal article
- research article
- Published by Acoustical Society of America (ASA) in The Journal of the Acoustical Society of America
- Vol. 76 (4) , 1175-1183
- https://doi.org/10.1121/1.391410
Abstract
The ECOLOG dual-beam echo-counting and sizing system is used in both a laboratory and a field situation with moderate densities of demersal fish. Free swimming fish in a large tank give estimates of backscattering cross section (.sigma.bs) with low variance. Application in field surveys confirms that dual-beam acoustic data provide information on both size composition and density distribution, which is different than single-beam estimates but similar to and at least as precise as that provided by trawl nets.This publication has 9 references indexed in Scilit:
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