Culture method of freshwater lobster

The pond needs sufficient water, convenient for water intake and drainage, and the area is generally 3-5 mu. The ridge of the pond should have a certain slope, and an anti-escape wall or board with a height of 0.5 meters and smooth inner wall should be set up around the ridge; some mud ridges should be built in the middle of the pond to provide a place for crayfish to dig caves; they should be strictly disinfected before stocking, 300-500 kg of mature livestock and poultry manure per mu; and aquatic grasses, such as bitter grass, which account for 30% of the pond area, are planted in the pond.

The pond where freshwater lobster is cultured under pond conditions should be in a place with sunny ventilation, quiet environment, convenient drainage and irrigation and no pollution to the water quality.

The ① pond should be rectangular, with an area of 1334 to 3335 square meters and a water depth of about 0.9 to 1.5 meters.

The bottom of ② pool is hard soil or sandy, there is no silt, and the pool wall must have a certain slope.

③ ponds should have a good drainage and irrigation system, one end of the upper end of the water, one end of the bottom drainage, the inlet and outlet should have anti-enemy, anti-escape net cover.

At the bottom of the ④ pond, there should be an appropriate area of submerged plants and sufficient artificial shelter, such as waste tires, nets, bamboo rafts, etc., for lobster shelter.

⑤ conditional ponds can be equipped with aerator.

⑥ should disinfect the pond before releasing shrimp fry. If it is a newly built shrimp pond, it can be cleaned with quicklime. If it is an old fish pond, it must be disinfected in dry ponds. In addition to sprinkling quicklime, it is also necessary to thoroughly remove the predatory enemy organisms in the pond, such as Loach, catfish, black fish, snakes and rats.

Water quality requirements mainly use the surface water of unpolluted rivers, lakes, reservoirs and other large water bodies as the water source, and groundwater can also be used as the water source. The freshwater lobster has strong adaptability, and the pH value of water can survive in the range of 6.10 to 9.33, but the suitable value is 6.5 to 9.0, preferably neutral alkali, in order to facilitate the rapid growth of lobster.

Although freshwater lobster is tolerant to hypoxia, if it is in a state of low dissolved oxygen for a long time, it will affect its growth rate and survival rate. The pollution of water quality by heavy metals, pesticides, herbicides, oil and methane should also be avoided. Micro-running water or regular addition of new water should be adopted in culture to promote growth.

Shrimp seedling release and daily management shrimp seedling release should be carried out in the early morning or evening on a sunny day. Before release, a small amount of pond water is slowly added to the seedling transport container to adjust the water temperature. The shrimp seedlings are put into the pond until the water temperature in the container is close to the water temperature. The stocking density is 7.5 to 9.0 per square meter, and the specifications of shrimp fry in the same pond are neat and consistent.