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Fish stocking
1. FISH STOCKING
Meaning
Fisheries management technique
whereby a quantity of fish of chosen
species are released by humans into
a water body
Categories
1. Provide more fish for recreational
fishing and enough fishing
opportunities for anglers
Put-grow-and-take stocking
- Small fish(fry –
juvenile)release into the
waters
- Fish survive on natural foods
- Take time to grow to a size
large enough to be harvested
- Objective: to maintain
enough fish in the stock over
long period
Put-and-take stocking
- Large adult/sub-adult fish are
released into the water
- Recreational fisherman can
immediately catch the fish
- Objective: to provide highquality fishing experience for
recreational anglers
2. Rehabilitate degraded fish stocks
Objective
- To improve the status of
declining fish stocks
- To restore species diversity
to a degraded water
- To create a fish stock
Types
- Enhancement stocking
Type of fish stocking that
is carried out to improve
the fish species diversity
Example: stocking tilapia
in lake to provide for
other fish
- Conservation stocking
Specialization form of fish
stocking designed to
maintain genetic diversity
of fish populations to
recover endangered fish
species
Problems
1. Overpopulations of the target fish
species
This problem arise because
fisheries managers wrongly
believe that the species is under
populated
In result it make fish in
competition among them for life
resource (food)
There are just too many fish that
is being stocked in a water body
2. Fish populations imbalance
There are just too many fish of
certain species and too few fish
of other species
Poorly planned stocking can lead
some species to be
overpopulated or underpopulated