Three heavyweights in the Norwegian salmon industry are reportedly battling it out to acquire a mid-sized salmon farm, according to industry sources.

John Fredriksen, Gustav Witzoe and Helge Gaso -- primary shareholders in Mowi, Salmar and NTS/Midt-Norsk Havbruk -- are apparently in the running for the group as part of an effort to build their respective salmon farming empires in a country with dwindling opportunities for growth.

Salmonor, a medium-sized salmon farming company based in the western region of Trondelag, is up for sale and about to be sold to a listed company, several independent sources told IntraFish sister publication Dagens Næringsliv (DN).