We know from economic theory that an  unregulated fishery will cause excess capacity, over-fishing and low  profitability. According to theory, a well managed fishery requires economic  incentives that yield economic decisions which are environmentally sustainable.  At present, Swedish fisheries are managed with a wide range of management tools  regulating when and how fisheries are allowed, but the tools do only affect the  economic incentives to a limited degree. Therefore, excess capacity may be a  major problem in Sweden.  
Capacity in Swedish pelagic fisheries  is studied in this report. Pelagic vessels are primarily used for herring,  sprat, mackerel, sand eel and blue whiting. The segment is the most important  Swedish fishery measured both in terms of the landed volume and in terms of the  value of the landings. 
Results from the study show that the  capacity in the pelagic segment is used to about 75 percent. This implies that  costs are higher than necessary, which has a negative effect on profitability.  Further, the analysis shows that larger vessels are more efficient than smaller  ones.