Fish cage farming is practiced all over the world. By keeping fish in cages, entire communities can share a body of water while each farmer can tend to their own individual fish farm. Fish cage farming is attractive to many individuals because a large crop can be raised, tended and harvested in a small area.
In Tanzania, the floating cage aquaculture has helped Iringa fish farmers increase their income since they adopted the technology to cope with environmental changes and reducing over dependence on forests
Kilolo District, Iringa Region has over ten cages which are used in ponds to breed fish and the pond which measures 2.5 square metres are used to breed over 600 fish which take between five and six months before harvesting.
Construction of the cage
Flexible cages are made by building a frame then covering it with netting made from nylon or a similar material.
Most species of fish can be raised in fish cages. Some species do better than others and some strains within a species will do better
Fish should be stocked at a density of five to eight fish per cubic foot of cage volume
All species must have some water movement; otherwise waste will build up under the cage.
Commercial fish feed contains the balance of proteins, amino acids, vitamins and minerals the fish need to grow and stay healthy.
Challenges with cage fish farming
- In adequate equipments to use while fishing
- Inadequate time for periodically check the sides of the cages
- Lack of technical knowledge for the production of fish
- Aquatic pollution through discharge of agricultural pesticides and domestic wastes