Cage fish farming

Cage farming is simply raising fish in a large, submerged cage that can be used in a pond or lake or sea. An ideal location for cage production farms is in the many lakes found in Kenya. Through the technology, the farmers can rear fish in cages with natural and artificial ecosystems, boosting fish production.

Areas with cages in Kenya

  • Nyando
  • Nyakach
  • Bomet
  • Kisii
  • Machakos

Types of fish reared in cages

  • Catfish
  • Tilapia
  • Carp

Construction of fish cages
Cages for fish can be constructed from a variety of materials and vary in shape and size. The two most important things to remember when constructing a cage include the following:

  • Cages should be made of sturdy materials. The cage materials should be strong, durable and non¬≠toxic.
  • The cage (mesh size) must be able to retain the fish, yet allow maximum circulation of water through the cage.

Common Materials for Cage Construction

  • Wood
  • Steel
  • Plastic

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Cage fish farming

Cage fish culture is the raising of fish in containers enclosed on all sides and bottom with mesh material that secures the fish inside while allowing relatively free water exchange with the surrounding environment

Sites with cages

  • Bwafu Site in Gisenyi.
  • Taba Site located in Gitarama.

How cages are made
Cages can be made of nylon net meshes, bamboo, wire mesh and any other material that can form a mesh enclosure. However the commonly used material is nylon. The size at which fish is stocked in the cage depends on the mesh size. For small fish, smaller meshes are required to guard against escape.

Advantages with cage fish farming

  • The technology directly and indirectly satisfies the universal fundamental goals of producing high quality fish
  • It is relatively inexpensive and simple therefore easily adaptable by small holder farmers with limited resources
  • It is applicable in most existing water environments and does not require conversion of land into new bodies of water
  • There is less likelihood of off flavour fish than in ponds
  • It is more adaptable than conventional aquaculture methods in meeting production

Placement of the cage
Species that require highly oxygenated water for instance trout or salmon can only be raised in moving water such as rivers. All species must have some water movement; otherwise waste will build up under the cage.

Harvesting
One of the benefits of fish cage farming is the ease of harvesting the fish. Fish may be removed with a hand-held net and processed or transported as they are removed. If the cage is large, nets may be used to move the fish toward one corner where they may be more easily hand netted.

 

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Cage Fish farming

Cage fish farming is a process whereby a cage is placed in a lake or a pond which enables the feeding of the fish in a controlled area.

Construction of cages
Cages for fish cage farming are made from either a hard plastic mesh or wire webbing. flexible cages are made by building a frame, then covering it with netting made from nylon or a similar material. The type of frame used depends upon where it will be placed. Flexible cages are only suitable for still waters where there is little threat from predators, such as turtles or large carnivorous fish.

The types of fish that can be kept in ponds and cages include the following:

  • North African Catfish
  • Nile tilapia
  • Carp

Placement of a cage
Species that require highly oxygenated water, such as trout or salmon, can only be raised in moving water such as rivers.

Stocking in a cage
Fish should be stocked at a density of five to eight fish per cubic foot of cage volume because lower densities encourage aggressive behavior.

Feeding the fish
Caged fish’s nutrition comes from fish food. Commercial fish feed contains the balance of proteins, amino acids, vitamins and minerals the fish need to grow and stay healthy.

Harvesting fish in a cage
Fish may be removed with a hand-held net and if the cage is large, nets may be used to move the fish toward one corner,

About The Author

Related posts

Cage Fish farming

Cage fish farming is a process whereby a cage is placed in a lake or a pond which enables the feeding of the fish in a controlled area.

Construction of cages
Cages for fish cage farming are made from either a hard plastic mesh or wire webbing. flexible cages are made by building a frame, then covering it with netting made from nylon or a similar material. The type of frame used depends upon where it will be placed. Flexible cages are only suitable for still waters where there is little threat from predators, such as turtles or large carnivorous fish.

The types of fish that can be kept in ponds and cages include the following:

  • North African Catfish
  • Nile tilapia
  • Carp

Placement of a cage
Species that require highly oxygenated water, such as trout or salmon, can only be raised in moving water such as rivers.

Stocking in a cage
Fish should be stocked at a density of five to eight fish per cubic foot of cage volume because lower densities encourage aggressive behavior.

Feeding the fish
Caged fish’s nutrition comes from fish food. Commercial fish feed contains the balance of proteins, amino acids, vitamins and minerals the fish need to grow and stay healthy.

Harvesting fish in a cage
Fish may be removed with a hand-held net and if the cage is large, nets may be used to move the fish toward one corner,

About The Author

Related posts

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