Recent studies of the distribution and abundance of grey seals (Halichoerus grypus) in north Norway, and their possible influence on parasitic infestations in fish

• Main Authors: Haug, Tore, Henriksen, Gunnar, Nilssen, Kjell Tormod, Ørjebu, Alfred
• Format: Report
• Language: English
• Published: ICES 1991
• Subjects: grey seal; havert; fish diseases; fiskesykdommer; 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::Resource biology: 921; Lofoten; Norway; Vesterålen; Finnmark; Gadus morhua; North Norway; Troms
• Online Access: http://hdl.handle.net/11250/104934

Distributions of grey seals Halichoerus grypus were studied during aerial and ground surveys in North Norway. Surveys were conducted from Lofoten to the Soviet border during the moult (March-April, Finnmark) and breeding (October-December, whole area) periods in 1988-1991. Numbers of grey seals seem...