Management of Herring, Capelin and Cod in the Greater Barents Sea - Economic Optimal Management from a Norwegian Viewpoint
By Kjetil HelstadABSTRACT
The model used combines a bioeconomic model for the herring stock to an existing multispecies bioeconomic model for the Barents Sea, ECONMULT. Several simulations are then done in order to study two different management strategies for the herring stock. The two management strategies studied are 1) herring is managed according to recommendation from ICES, and 2) the herring stock is kept at a low level. The reason to keep the herring stock at a low level is to minimise the predation from herring on capelin in the Barents Sea. We simulate the two herring management regimes under different assumptions about the TAC in the cod fishery and if capelin fishery takes place or not. The simulation results show that the contribution margin in the cod fishery and especially capelin fishery increases a lot when the herring stock is kept at a low level. The total contribution margin from all three fisheries decreases when the herring stock is kept at a low level, especially if the profit from the herring fishery in the period when the herring stock is kept at a low level is not taken into account. This show that a strategy to reduce the herring stock and by that increase the contribution margin in other fishery is not economic optimal from a Norwegian Economic viewpoint.
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