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Herring live in large shoals and migrate along the coast and out to sea down to depths of up to 200 metres. They can live up to 20 years and live on small crustaceans, fry and plankton. There are several herring stocks in our waters, but Norwegian spring spawning herring is definitively the largest. There are also other herring stocks off Iceland, in the North Sea and in the Skagerrak, among others. Norwegian spring spawning herring spend their winters in the Vestfjorden area.
Herring become sexually mature at the age of 3–4 years. February/March sees the start of the migration towards the fields off North-western Norway, where most of the spawning takes place. Herring continue westwards on their migration for food, then head north and finally head east as autumn progresses. The fry follow the coastal current northwards, and the young herring grow up in the Barents Sea.
Nutritional value per 100 g of herring
Energy: 965 kJ or 320 kcal
Nutrients (g): Protein: 15.2
Fat: 14 Of which saturated fat: 23.1 Monounsaturated fat: 46.5 Polyunsaturated fat: 26.5 Of which Omega 3 (n-3): 24.8 Omega 6 (n-6): 1.7