Water pollution from fish production

The fish farms pollute the water with nutrients, methane and hydrogen sulphide, and chemical residues which threaten both farmed fish and other marine life. Growth promoters and antibiotics are added to food. Pesticides are used to treat infestations of sea lice, for example.

In Denmark, 70 to 80 percent of drugs administered in fish farms end up in the environment. Usually they are added to feed which falls out of cages into rivers or the seas without being eaten. Studies of sediments beneath the fish cages have found concentrations of up to 11 parts per million of the antibiotic oxytetracycline.

1. Water pollution
2. Liquid wastes
3. Environmental hazards from fishing industry
4. Effluents from animal husbandry

1. Waste waters
2. Pollution of inland waters
3. Pests and diseases of fish
4. Organic wastes
5. Marine pollution
6. Infectious drinking water
7. Hydrogen sulphide as a pollutant
8. Eutrophication
9. Environmental hazards of pesticides
10. Ammonia as a pollutant
11. Accumulation of pollutants in marine wildlife
12. Accumulation of pollutants in freshwater wildlife

1. Unutilized fish by-products
2. Unsustainable shrimp farming
3. Inadequate facilities for the transport of sanitary wastes
4. Health hazards from animal feedstuffs

1. Environmental hazards from meat production

1. Promoting aquaculture
2. Investigating interaction between agriculture and environment
3. Farming fish

1. Wastage
2. Unproductivity
3. Underproduction
4. Pollution
5. Overproduction