This report contributes to the understanding of how the socio-economic contribution of Nordic fisheries and aquaculture are affected by the environment and environmental management, with a focus on nutrients. The report contains two case studies: How the socio-economic contribution of Danish and Swedish cod fisheries in the Western part of the Baltic Sea are affected by the concentration of nitrogen in the sea, and on how the growth rates of salmon in aquaculture in the Bokna Fiord are affected by nitrogen concentration.

The effects of nitrogen on the socio-economic contribution of Danish and Swedish cod fisheries in the Western part of the Baltic Sea will be limited, while fisheries policies such as reducing fishing pressure will have a larger effect. The profitability of Norwegian salmon farming is not considerably affected by nutrients.

Furthermore, a Nordic workshop has been held with the title: Fisheries, aquaculture and the marine environment: Environmental challenges and regulation, with focus on nitrogen. The finding of the case studies were presented at the workshop, together with presentations made by invited speakers on the role of nutrients and their management for Nordic fisheries and aquaculture. The discussion at the workshop is summarized in this report.