Sustainable fish farms and optimal use of the fish food

Abstract

The open sea fish farm industry is under considerable pressure to ensure that fish farming represents a sustainable industry. Many challenges are present related to fish health due to fish lies, considerable density of fish with limited room to move, accelerations of the cage in large waves and needs to limit the use of antibiotic in the offshore environment. Much good work is done to increase fish health, design safe cages and limit pollution from fish farms. In this paper a discussion is presented of how to ensure that the food stays longer in the cage, enabling the fish to consume a larger part of the food and limiting the food that sinks to the seafloor, thus limiting the pollution at the seafloor.