The Norwegian industrial trawl fishery in the North Sea.

A study on how the total catch in 1975 could have been increased without exceeding the quotas of cod, haddock and whiting~Linear programming is used to demonstrate a way to maximise the total catch in a mixed fishery. Constraints are set by quotas, as well as requirements that the total catch should not be too unevenly distributed between areas and through the season. A practical application of this technique in fisheries management depends on a satisfactory prediction of the ratio of the quotaregulated species in the total catch before the season starts