Crab - Shrimp polyculture

The application of eco-friendly and environmentally friendly farming such as crab-shrimp polyculture has becomes more popular. These farming methods are suitable with low investment capital and low technical skills. With crab-shrimp polyculture, harvested products are of large sizes, assured quality, and sold at high prices in the market.

Farmers combine crab and shrimp in farming should note the following tips:

1. Stocking density of shrimp is 1 to 3 shrimp/square meter. After stocking shrimp for 1 month, stock crab with a density of 0.5 to 1 crab/ square meter.

2. For pond preparation and improvement:

Must reinforce embankments to ensure firmness. Build internal systems with bumps and places for crab to hide, molt and grow in ponds. Provide shielding plants or nets for crab to cling and grip. On pond edges, use a fine mesh to prevent crab from escaping at the corners of the pond or escaping from water-pumping lines.

3. Select shrimp and crab before stocking:

- For shrimp post larvae, only purchase high quality shrimp.
- For juvenile crab, do not choose small sized crab. It is best to choose crab sized 2.5 centimeters each. Crab should have uniform size, uniform color, quick response, and full sets of claws.

4. Nursing before transferring shrimp and crab to farming ponds:

To increase the survival rates of shrimp and crab, before stocking them into farming ponds, shrimp and crab should be reared in nursery ponds and tanks for about 20-25 days. Stocking shrimp 1 month before stocking crab to avoid loss.

5. Care and management:

In farming ponds, there must be enough feed for shrimp and crab. Change pond water every 15-20 days. Each time, change 20% of the water in pond.