Results of investigations of migration pattern of artificially reared coastal cod (Gadus morhua L.) in western Norway

• Main Authors: Svåsand, Terje, Godø, Olav Rune
• Format: Report
• Language: English
• Published: ICES 1987
• Subjects: tagging; merking; cod; torsk; migration patterns; vandringsmønster; VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921; VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452; VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Catch: 925; Norway; Gadus morhua
• Online Access: http://hdl.handle.net/11250/104324

Investigations of the migration pattern have been a central part in an ongoing enhancement study of cod in western Norway. In Sept. - Nov. 1983, 20,947 juvenile, basin-reared cod fry were tagged and released at three sites in western Norway. Tag returns to 1 June 1987 were 15.4% (83-I), 2.0% (83-II) and 20.4% (83- III). Most cod were recaptured in shallow nearshore waters near the release sites. No significant changes in migration pattern with age were found. There did not seem to be any significant differences between the migration patterns of reared cod and wild cod tagged as juveniles in the same area.