Abundance estimation of Norwegian spring spawning herring wintering in the Vestfjord system, December 1996

• Main Authors: Ostrowski, Marek, Foote, Kenneth G., Røttingen, Ingolf, Slotte, Aril
• Format: Report
• Language: English
• Published: ICES 1997
• Subjects: herring; sild; stock assessment; bestandsberegning; spawning stock; gytebestand; sampling; prøvetaking; 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; Norway; Tysfjord; Vestfjord
• Online Access: http://hdl.handle.net/11250/105723

The spawning stock of Norwegian spawning herring has been surveyed when wintering in the Vestfjord, Tysfjord, and Ofotfjord, in northem Norway in December 1996. The basic method is that of echo integration, with compensation for acoustic extinction. Physical capture has been effected by means of the...