Environmental impact of a marine fish cage culture

Cultivation of fish in floating net cages increased rapidly during the 1970's. It was not until recently that investigations on environmental impact of fish cage farming were initiated. The need for such studies has increased due to the intensified use of the cage culture technique. We present in this paper a project designed to study environmental impact of a fish cage farm in the marine environment. Results from measurements of sedimentation, benthic fluxes of nutrients in-situ, sediment oxygen uptake, gas ebullition, and chemical composition of sediments and pore waters are presented.