Habitat Impact

Habitat Impact

West Coast of Canada

Aquaculture poses indirect risks to wild salmon as a result of changes that occur in the ecosystem that is necessary to maintain the correct habitat and food chain for their survival. Wild salmon could be negatively impacted if disposal of diseased morts or blood water coincides with migration or spawning activity.

Uzbekistan

Fish farming in Uzbekistan has little negative habitat impact since fish farming is entirely pond-enclosed. In fact, the impact could even be positive since water from fish beds is being used to fertilize crops such as grains and vegetables.

China

Spreading chemicals over an entire pond is a common method of disease prevention in China. Water quality is decreasing as a result of the lack of regulations and management in this area. Very heavy fertilization and feeding are used on all farms with the most common fertilizers being organic manures like pig manure (which is the most important). China also seems to have an extremely unbalanced distribution of water with serious shortages in the north and oversupply in the south. This is a serious environmental problem and a hard one to resolve.

Norway

Salmon farms in Norway have numerous sources of chemical pollution including antibiotics and other drugs, pesticides, feed additives, paints used on net cages and boats to prevent marine growth, and disinfectants. Farmers use a "dilution" approach to the pollution problem.