Report of the North Western Working Group (NWWG), Sec 4

Tagging experiments carried out at Greenland and Iceland show that mature cod at West Greenland migrate to East

Greenland. Tagging experiments at East Greenland also show that mature cod from that area migrate to Iceland

(Tåning, 1937; Hansen, 1949; and Anon. 1971). On the other hand, immature cod seem not to emigrate from East

Greenland to Iceland, but in some years immature cod migrate from East Greenland to the West Greenland stock

(Anon. 1971). Tagging experiments at Iceland show that migration of cod from Iceland to Greenland waters occurs very seldom and can be ignored in stock assessments (Jonsson 1965, 1986). Migrations from Greenland waters to Iceland can, therefore, be regarded as a one-way migration.