The wider availability of lower-quality salmon in the market has pushed prices of more sought-after, export-quality fish higher, market sources told IntraFish on Friday.

Lower-quality salmon are referred to as "production" fish and must be first offered on the domestic market before they can be shipped to foreign buyers.

Typically less than 10 percent of the salmon are production fish, but in the winter the proportion may be higher due to winter sores, among other things.