Determining the extinction cross section of aggregating fish
Citable URI
https://hdl.handle.net/1912/5644As published
https://doi.org/10.1121/1.403682DOI
10.1121/1.403682Keyword
Sound waves; Cross sections; Extinction; Fishes; Fiords; Underwater; Acoustic monitoringAbstract
When fish are aggregated over a flat bottom, and fish and bottom echoes can be distinguished, it is possible to determine the fish extinction cross section by a simple application of the echo integration method. The theory for this is developed. Measurements at 38 kHz are presented for aggregations of the same 1983‐year class of herring over flat‐bottomed fjord areas in 1988, 1990, and 1991. The ratio of extinction and backscattering cross sections is found to lie in the approximate range from 1.2–2.3, depending on fish size and time of day.
Description
Author Posting. © Acoustical Society of America, 1992. This article is posted here by permission of Acoustical Society of America for personal use, not for redistribution. The definitive version was published in Journal of the Acoustical Society of America 91 (1992): 1983-1989, doi:10.1121/1.403682.
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Suggested Citation
Article: Foote, Kenneth G., Ona, Egil, Toresen, Reidar, "Determining the extinction cross section of aggregating fish", Journal of the Acoustical Society of America 91 (1992): 1983-1989, DOI:10.1121/1.403682, https://hdl.handle.net/1912/5644Related items
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