This is a process of raising shrimp based on copefloc technology, but in the process it requires adding more fermented foods or processed food (industrial feed). The advantage of this technology is the use of natural feeds already existing in ponds and the addition of plant-derived fermented foods such as rice bran or fermented soybeans. This helps reduce production costs and, increase growing rates, and you can have a more densely populated pond.
With this methods, you need a large area of 0.5 to 1 ha per pond. The shrimp density is 30-100 shrimps/ m2. After reconstrucing the pond to meet the technical requirements, add to the pond finely ground rice bran at the dose of 400-500 kg (50 ppm), fermented with bio-product after 24-48 hours and keep pumping air to stimulate the growth organisms. This will create a natural food source for shrimp. Continue adding fermented rice bran daily with a rate of 30-50 kg / ha until the transparency level is 30-50 cm. Keep pumping air and maintain the dissolved oxygen level above 5 ppm and pH level 7.5-8.0 until stocking.
Continue maintaining daily fermented rice bran with the same doseage throughout the farming period. After stocking for about 5 days, add fermented soybeans at a dosage of 1-3 kg per 100,000 shrimps. Feed shrimps fermented soybeans according to the body weight ( 1-5%, depending on the weight of shrimp) 3 times per day, combined with fermented rice bran during the farming process. You can add industrial foods 1-2 times a day, depending on densities and food demands. If you add industrial feed, you should reduce the numbers of times you feed shrimps with fermented soybeans and rice bran.
Three-phase shrimp farming in ponds
Three-phase shrimp culture system developed by Grupo Granjas Marinas Company, Honduras. The highlight of this technological process is the large-scale rotifer and copepod crustacean system combined with shrimp pond and commercial pond to shorten the culture cycle and increase the production cycle. Shrimp yield increased significantly without relying on other protein sources from artificial feed.
Their three-phase shrimp culture system includes a central shrimp culture pond, a raceway system, a rotifer and copepod system, and post-larvae that will be transferred to the pond. Commercial space is larger. This system can produce shrimp weight of 15-16 g / unit over a period of 8 weeks with a weekly growth rate of 4.2 g / fish, with an average survival rate of 74%. In the immediate future, the company has put into operation 400 hectares of old ponds and is planning to build an additional 700 hectares by 2015.
This multi-phase system not only increases production efficiency but also opens up new opportunities for environmental protection thanks to the use of natural food. A very large biomass of nutrient-rich zooplankton can be produced shortly as a substitute for artificial feed for shrimp, contributing to the sustainability and profitability of shrimp farmers. .