CATDOLL : CATDOLL: How to raise crabs?

Crab is one of the delicious dishes on our table and has a very high economic value. At present, what is the most profitable aquaculture product, besides crayfish, is crab. Many people have seen the benefits of crab farming and want to do it, but how to operate it? Crab farmers may sometimes find that the crabs they farm suddenly die in large numbers, which brings great losses to farmers. So what is the cause of this death? How to prevent and control it?

Four key points of crab farming 1. Seedling quality

The quality of crab seedlings is extremely important in crab farming. As more and more people are farming crabs, the quality of the seedlings is getting worse year by year, and the survival rate is also gradually declining, causing many people to lose a lot of profits. Therefore, the quality of the seedlings must be guaranteed during farming, which is the basis of crab farming. Only by improving the survival rate of the seedlings can the healthy growth of crabs be guaranteed and the profits be increased. When feeding the seedlings, you should also pay attention to the nutritional ratio to avoid malnutrition of the seedlings, which will cause the seedlings to be weak and easily infected by bacteria and die. Try to keep the seeds for yourself after farming, as the quality of the purchased seedlings cannot be guaranteed.

2. Water quality management

Another key point is the management of pond water quality. Water quality is extremely important in crab farming, which is related to the water quality and reproduction of crabs, especially in summer when the temperature is relatively high. The water temperature is high, the water quality deteriorates rapidly, and bacteria are very easy to proliferate. Their reproduction will affect the growth and health of crabs. At this time, water quality management should be done well, and water should be changed and disinfected frequently to inhibit the reproduction of bacteria. If the water level is too low, as the water temperature rises, crabs will have adverse reactions. It is necessary to change the water in time, and clean up the food residues each time the water is changed to provide a suitable growth environment for crabs.

3. Bait management

When breeding crabs, bait is also very important. It is necessary to ensure the freshness of the bait and its palatability, so as to increase the crabs' appetite, increase their food intake and promote their growth. Generally, the feed is mainly meat bait, and other meat and vegetable baits are reasonably matched. The feeding amount should be reasonable to ensure that the crabs are full without causing waste, so as to avoid residual bait polluting the water quality.

4. Inspection

Each farmer should make a habit of inspecting the crabs once in the morning and evening, mainly to check the water quality, crab feeding and crab activity, and deal with any abnormalities in a timely manner. In addition, the anti-escape measures should be checked regularly, and any loopholes should be repaired in time to prevent the crabs from escaping.

What should I do if a large number of crabs die? 1. The temperature is too high

Sometimes the temperature is too high, the water quality will change to a certain extent, and the crabs may suddenly be poisoned and die. The most likely reason is that the bottom water quality has deteriorated. Or when the temperature is high, the weather is also hot, and the water temperature will also increase. When the temperature is high, there is less oxygen in the water, and the crabs die of lack of oxygen. The solution is to use an aerator and plant some small algae to increase oxygen. Carry out bottom modification treatment to improve water quality and use a shade net to cool down.

2. Food poisoning

Sometimes crabs eat dead aquatic animals, dead fish and shrimp in the water. The bacteria of dead animals multiply rapidly, and crabs will be infected and die after eating them. Even dead fish and crabs have a lot of toxins and bacteria, which can also poison people. Therefore, do not put too many small fish and shrimp in the water. Once in a while, you need to salvage dead fish and shrimp, animal carcasses and impurities that pollute the water quality. Sprinkle lime frequently for disinfection.

3. Water pollution

If the water is polluted, the color will generally turn into dark brown, dark black, dark green, etc. Some colors will turn purple. Some will become sticky. It feels turbid. Sometimes algae will suddenly appear due to weather changes, or the water quality will age over time. Generally, directly spraying detoxification drugs or directly spreading lime can improve the aging of water quality. Biological bacteria can be used to improve water quality.

4. Rotting of water plants

Aquatic plants in the pond die in large areas and begin to rot, polluting the water quality. For example, Elodea will easily die and rot as long as the water temperature exceeds 25 degrees. The bacteria in the water increase, the water color becomes black, and there is a lack of oxygen. Or there are too many aquatic plants, insufficient space, and insufficient oxygen. The living environment of crabs becomes worse and they are prone to death.

The mass death of crabs is mostly caused by the deterioration of the living environment. However, there are often some factors that affect the living environment and cause the deterioration. We need to pay attention to providing good conditions.

For crab breeding, soft mud and sand need to be laid as the bottom, and an appropriate amount of green plants should be added to the breeding dish. Some artificial stones can also be placed as cover for crabs, so that the environment can conform to the living habits of crabs.

Crabs should be kept in water, in a sunny place, and occasionally eat small fish, shrimps, etc.

First of all, crabs are aquatic animals, so when we raise crabs, we must give them more water, otherwise they will easily die of thirst.