The benefits of Tilapia-Shrimp polyculture:
- Reduce the growth of Vibrio bacteria in water, control early mortality syndrome EMS (AHPND disease) in shrimp
- Take advantage of shrimp feed leftovers
- Stabilize pond environment, prevent pathogens arising, reduce shrimp mortality rate
Some methods of farming tilapia with shrimp:
- Combine shrimp and tilapia in the same pond: After 15 days of stocking shrimp, stock tilapia. With each 100,000 shrimp, stock 100 tilapia type 50 grams/fish. If there are too many fish in pond, they can grow too fast and compete with shrimp habitat. After 3 months of farming, shrimp and fish can be harvested. If farmers want larger fish, move tilapia to another pond and continue farming.
- Farm tilapia in netted cages in shrimp ponds: this model is the most applicable method; it is easy to harvest. In a 5000-square-meter shrimp pond, cover a 300-square-meter area with nets and stock 5000 tilapias in it.
- Raise tilapia in a separate pond, then transfer water from tilapia pond to shrimp ponds for farming
- Raise tilapia in a separate pond, and then transfer water from tilapia pond to shrimp ponds. Add on and farm a small number of tilapia in shrimp ponds.
Some notices of farming tilapia cages in shrimp ponds:
- For intensive shrimp ponds with aerators installed, place tilapia cages or netted areas in low-lying zones in the middle of the ponds. These cages and areas will account for 7-10% of each pond. Nets have sparse meshes (about 0.5 - 1 cm).
- Only stock unisexual, lage tilapia (type 15-20 fish/kg). Their size should be larger than meshes of the surrounding net. Stocking density should be at 6-8 tilapia/m2.
- In high-density shrimp pond, stock tilapia in cages or netted areas. There is no need of feeding. Ventilate the cages or nets once every 15 days.
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In rainy season
In the shrimp ponds
Temporary process for safe brackish-water shrimp farming in areas affected by diseases in Vietnam