Shrimp grow in different kinds of farms. As they enter the grow-out phase, the shrimps grow to maturity. The post larvae will then be transferred to ponds where they will be fed until they reach the size that are ready for market. It will take between three to six months when raised in shrimp farming before they will be ready for selling. Harvesting shrimps can be done by manually fishing them from the ponds with the use of nets or by draining the water from the pond to catch the shrimps. There are different types of shrimp farms that a lot of farm owners used.
First are extensive farms for shrimps. This kind of farm uses traditional low-density methods and it is commonly located on a coast or it is often found in the mangrove areas. The range of the pond is from a few hectares to a maximum of 100 hectares. The shrimps are stocked at low densities. They place two to three animals per square meter or 25,000 per hectare. The tides from the ponds can provide water exchange and the shrimps usually feed on the occurring organisms. Some owners open the gates and grow wild shrimps by impounding wild larvae. This kind of farm is very common to less developed countries where all the land prices are low. This kind of shrimp farm has low production costs, they are not labor extensive and advance technical skills are not required.
Second is the semi-intensive shrimp farm. These kinds of shrimp farms does not rely on tides like extensive farms. They use water pumps to change the water in the ponds and they provide a planned pond layout. The sizes of these ponds range from two to 30 hectares. The stocking density ranges from ten to 30 animals per square meter or almost 100,000 to 300,000 animals per hectare. Because of the density, the need for artificial feeding with the use of industrially prepared shrimp feeds and fertilizing the pond to grow naturally occurring organisms became very important in shrimp farming. Aeration is often required because of the huge quantity of animals on these farms.
Third is the intensive shrimp farm. This shrimp farm uses smaller ponds compared with extensive and semi-intensive. They also have higher stocking densities. These shrimp farms must be managed efficiently: they are aerated, water exchange is done frequently to remove waste products from the water and they maintain water quality and they also provide specially designed diets for the shrimps. These farms require advance technical infrastructure and professionals for constant monitoring of the condition of the ponds.