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Reidar Toresen
Reidar Toresen
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Warmer seas, less food

Calanus finmarchicus is the main food source to fish in our seas. Warmer seas have lead to an increase of Calanus finmarchicus in northern waters, while less in the North Sea.

This is the main reason why the North Sea herring has had a poorer recruitment the past years, said Reidar Toresen, director of research at the IMR, when he spoke at the North Atlantic Seafood at Lillestrøm today.

herring

Toresen explained that warm periods have a positive impact on the large stocks of Norwegian spring-spawning herring and northeast arctic cod. In the North Sea fish and capelin enjoy cold periods.

 

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Reidar Toresen
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