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Nordic fisheries and aquaculture

Socio-economic importance of nitrogen nutrient load in the environment

image of Nordic fisheries and aquaculture

This report contributes to the understanding of how the the socio-economic contribution of Nordic fisheries/aquaculture are affected by the environment and environmental management, with focus on nitrogen. The report contains two case studies of how the socio-economic contribution of Danish/Swedish cod fishery in the Western Baltic Sea are affected by the nitrogen in the sea, and on how salmon growth rates in aquaculture in the Bokna Fiord are affected by nitrogen concentration. A Nordic workshop was held with the title: Fisheries, aquaculture and the marine environment: Environmental challenges and regulation, with focus on nitrogen. The finding of the case studies was presented at the workshop, together with presentations made by invited speakers on the role of nutrients and their management for Nordic fisheries/aquaculture. The discussion at the workshop is summarized in this report.

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Case II: Influence of nutrients on growth of salmon at marine fish farms in the Bokna Fiord in Norway

The purpose of this chapter is to investigate whether and how nitrogen affects growth of farmed fish in Nordic aquaculture, focusing at the case of salmon farming in the Bokna Fiord. Bokna Fiord is chosen for analysis since it is in Southern Norway where water temperatures are higher, inducing the highest risk of causing hypoxia. The chapter is founded in production economics and applies regression analysis. This case study is performed by Professor Frank Asche and Jay Abolofia from University of Stavanger, Norway.

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