What should be paid attention to about the breeding of river crabs, and what does it eat?

If you breed river crabs, you should pay attention to the breeding density, and you can choose mussels, livestock and poultry blood, bitter grass, cereals, bran and other types of food. Before you want to eat, you should clean up the tadpoles and frog eggs in the pond in time, and do this after breeding, and change the water according to the climate, you can usually change the water once a week in spring, and you can usually change the water once every 3 days in summer, and if you encounter continuous high temperature weather, you can change the water every day.

First, the water source is sufficient, the water quality is fresh and pollution-free.

River crabs are very sensitive to water quality, and unqualified aquaculture water bodies are not good for raising crabs. If the crab pond enters the polluted water, it will accumulate toxicity in the body of the river crab, affect the quality of the river crab, and be harmful to the human body when eaten; In the worst case, river crabs will die on a large scale, causing important economic losses.

Second, the construction of the living environment should be reasonable.

River crab breeding should not only have sufficient water sources, wide water depth, convenient drainage and irrigation, less sludge, fresh water quality, and abundant bait sources, but also build a good living environment for river crabs according to the characteristics of river crabs. There should be a deep water area and a shallow water area, and the ratio of the area of the deep and shallow water area should be more than 3 1.

3. River crab seedlings should be free of pathogenic microorganisms.

The introduction and use of diseased or unsterilized seedlings with latent pathogens can cause an epidemic or pandemic of a certain crab disease when the conditions for disease are ripe. The purchase of river crab seeds should be tested for pathogens and disinfected before being placed in the crab pond. Practice has proved that most of the crab species introduced from the affected areas will get disease, and healthy crab species will rarely get sick.

Fourth, there should be a reasonable breeding model.

In the process of raising commercial crabs, some crab farmers will always raise a part of the baby crabs in the month, and at the end of the harvest, they catch mature crabs, and the remaining crabs continue to be reared, and the baby crabs are replenished in the following year. For this breeding mode, they not only do not see its harmfulness, but think that it is a "good method" to raise crabs, and as a result, the phenomenon of large crabs and enemies killing small crabs and soft-shell crabs is very serious.

The correct approach is: the stocked river crab seedlings should ensure that the specifications are consistent, and the pond should be thoroughly cleaned and disinfected for a breeding cycle.

Fifth, the feed nutrition should be reasonable.

In the process of crab farming, some crab farmers do not feed enough bait, which makes the river crab grow slowly and the body is thin; Although some bait is more, the quality of the bait is poor and cannot meet its nutritional needs; Some only feed plant-based bait, not animal bait, resulting in protein deficiency and so on.

When breeding, we must choose high-quality varieties, and then we should also pay attention to the clarity of the water, and then replace the water source of the elevator, and then we should also keep the oxygen in the water sufficient, choose some suitable bait, you can choose some small fish and small shrimp, and do a good job of disease prevention, and pay attention to the time and interval of feeding. They eat small fish and shrimp, as well as some nutritious bait.

Eat small fish, small shrimp, plankton, plants, aquatic plants and its kind. And river crabs are very easy to breed, so we must pay attention to these aspects when breeding river crabs.

Like to eat aquatic plants, snails, shrimp, soy milk, small fish, insects, pay attention to the oxygen in the water, water, as well as food, the temperature in the water, and the weather conditions.

It is necessary to pay attention to the quality of the water, to pay attention to the quality of the river crab, to choose the right bait, and usually eat some plant bait such as aquatic plants.