What kind of food do crabs eat? how can crabs not die?

Crab is a variety of animals, like to live in the sea or the water, the current distribution of crabs in China is very wide, many places can see its figure. Now there are many people who breed crabs, but in the process of breeding, many people don't know what to feed crabs. Let's take a look!

What food does the crab eat?

All kinds of creatures that crabs like to eat and grow naturally in water or on land are called natural baits. Natural bait mainly includes phytoplankton, aquatic plants, benthos, terrestrial animals and plants and so on.

1. Phytoplankton: including diatoms, Chrysophyta, dinoflagellate, Euglenophyta, Chlorophyta, etc., which are the feed for early young crabs and zooplankton.

2. Zooplankton: rotifer, Cladocera, flexopod, etc., is a good feed for it.

3. Aquatic plants: including bitter grass, verticillium verticillata, Potamogeton crispus, Rabdosia malayensis, turnip, duckweed, water lily, water peanut, golden grass, etc., are its main natural bait.

4. Zoobenthos: snails, clams, clams and water earthworms in the water are its best feed.

5. Terrestrial animals and plants: including yellow powder insects, earthworms and ryegrass, Equisetum equisetum, aggregate grass and so on.

How to raise crabs will not die.

1. It is necessary to use a basin to raise at home, and some fine sand can be put in the basin to form a small platform. The water raised should not be too deep, the best water depth is that the steel is immersed in the shell of the crab, and the water raised can be used with tap water, but it can only be used in the sun for a day.

2. Bask in the sun properly. Crabs can bask in the sun, but not for too long.

3. Crabs are omnivores. If possible, you can feed red nematodes, you can feed egg yolk, of course, crabs can also eat chicken and duck offal or small fish and shrimp. At the same time, we should feed some grass food. You should pay attention to the amount of food, and eat it within half an hour, otherwise the rest of the food will pollute the water.

4. The feeding intensity of crabs increases or decreases with the change of season and water temperature. When the water temperature rises above 15 ℃ in summer and autumn, the feeding ability of crabs increases, and the crabs are fed once a day. When the water temperature drops below 15 ℃, the feeding ability of crabs decreases and can be fed every other day or several days. The appropriate time for feeding is around evening, because crabs are aquatic animals that lie dormant during the day and come out at night.

5. Crabs are social animals. The most several crabs are raised together, so that the survival rate is higher.

6. Wash the crabs. When cleaning the crab, fix the crab with your hand and brush it with a toothbrush with shower gel or soap, especially at the dead corner, pull its feet (not too hard) to brush. Wash clean with water after taking a bath, wash the fish tank, and sprinkle some salt occasionally, mainly to prevent infectious diseases.

What are the common breeding methods of crabs?

The main results are as follows: 1. The whole process of crab culture in the pond can be controlled artificially, and the recapture rate is higher, but the specification and meat quality of crab culture in the pond is inferior to that in the large water body.

2. Caodang, Lutan crab lawn and Reed beach are suitable for the ecological requirements of river crab growth, with low production cost, large listing specifications and good quality, but the recapture rate is low.

3. Raising crabs in rice fields is a new aquaculture industry developed in recent years. This method can not only reduce the application of fertilizer, kill insect pests and weeds in rice fields, but also increase the 1000-grain weight of rice, slightly improve the environment of rice fields and adapt to the growth of adult crabs.

Do a good job in the prevention and control of crab disease

The prevention and treatment of crab disease should give priority to prevention, early detection, early treatment, no disease prevention and early treatment, and different methods should be taken to prevent crab disease at different growth stages. Photosynthetic bacteria, EM bacteria and other microbial preparations were selected to regulate water quality. Prevention such as quicklime and dibromohydantoin are used regularly in high temperature season. In the period of high incidence of ciliates, chitin or ciliate was used once every 15 seconds and 20 days. In order to avoid drug resistance, drugs should be used alternately. Trembling disease is a kind of microorganism between bacteria and virus. Using enemy to kill the pool is an effective method to prevent and cure trembling disease.

Crabs are generally draught creatures or aquatic plants, if the crabs are raised at home, they need to bask in the sun at the right time, and the frequency of feeding also needs to be grasped. For the first time, crabs can also be cultured in ponds, rice fields and other places, and timely disease prevention is needed in the process of breeding.