Extinction cross section of herring: New measurements and speculation

• Main Author: Foote, Kenneth G.
• Format: Report
• Language: English
• Published: ICES 1994
• Subjects: herring; sild; acoustics; akustikk; stock assessment; bestandsberegning; VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Catch: 925; VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452; VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fish health: 923; Bergen; Ofotfjorden
• Online Access: http://hdl.handle.net/11250/105255

Acoustic abundance estimation of dense, vertically extended aggregations of fish requires knowledge of the extinction cross section. An established method based on a comparison of the area backscattering coefficients of fish and underlying flat bottom is exercised for herring in Ofotfjorden, January...