Norway is the world's top salmon exporter, and the share price of listed farming companies depend heavily on changes in the price of fish.

"We see a significant downwards correction next week," said a salmon producer who declined to be named, adding that recent supplies of fish to the market had been higher than expected as fish farms kept operating even on public holidays.

The surge in prices over the last several weeks was also seen as unsustainable, he said. Prices peaked at around 80 crowns per kilo in early January before dropping to 50 crowns, but have since rallied.

An exporter confirmed the steep fall for next week, adding that trading volumes were thin so far.

"Around 65 crowns is probably a more sustainable level going forward, but we do expect a higher volume of fish from July," he added.

Supply constraints are expected to support prices in the first half of 2017 before an expected increase in volumes later in the year.

Leading Norwegian producers include Marine Harvest (>> Marine Harvest ASA), Salmar (>> SalMar ASA), Leroy Seafood (>> Leroy Seafood Group ASA), Grieg Seafood (>> Grieg Seafood ASA) and Norway Royal Salmon (>> Norway Royal Salmon AS).

(Reporting by Camilla Knudsen, editing by Terje Solsvik)