How to raise river crabs at home, how to raise small river crabs at home

You must know that the production of crabs is to use live crabs, and dead crabs will carry a large number of bacteria. If people eat dead crabs, it will cause abdominal pain and diarrhea, and in severe cases, it can also cause the death of the patient. Therefore, once people buy a large number of crabs, it is best to breed them at home to avoid all kinds of waste caused by the death of crabs.

So, how do you raise crabs at home?

Environment: The bigger the ordinary fish tank, the better, the water is OK as soon as the bottom of the tank is full, and the water is replaced in two or three days. If you're hardworking, put some stones in it, (be careful that he builds stones to escape) However, you have to clean the stones often, it's very troublesome, my fish tank is not placed.

Diet: Crabs are not picky eaters, you can feed shrimp (crabs catch themselves or dried shrimp) small shrimp in the water! Noodles, eggs, cabbage, dried tofu, chicken, beef, etc., in short, almost all the crabs that people can eat!

It's best to be cooked, raw will make the fish tank fishy!

Amount of food: Feed once or twice a day, once he is one-third the size of one foot, and clean up the debris in time!

Tease: Use a small stick to pluck him, and after getting acquainted with you, he won't be afraid of you.

Cleaning: (more cruel) Fix the crab with your hands, and then brush him with a toothbrush dipped in shower gel or soap, especially in dead corners, and pull his feet (don't try too hard) to brush. After bathing, rinse with water, wash the fish tank, and occasionally sprinkle a little salt, mainly to prevent infectious diseases.

Note: When he is held by you, it cannot be higher than 20 cm, otherwise it may be crippled. He should have as much space as possible, not too small!

The above talks about several ways to raise crabs at home, you can choose a method you like to breed crabs. However, we do not recommend that you raise crabs at home, because the conditions at home are limited, and the best temperature and water cannot be given to the crabs, which can easily cause the death of crabs.

How to raise river crabs at home? If you want to keep river crabs for a long time, it is best to dig a small pond at home. Or a large fish tank in it, if you just keep it for a few days, you can put it in the refrigerator in the crisper and sprinkle some fried sesame seeds.

In this way, the crab will not lose weight for a week.

How to raise small river crabs at home: choose a suitable container, raise them in sun-dried tap water, and decorate them with sand, stones, etc. in the tank. When feeding small river crabs, the amount does not need to be too much, and the water needs to be changed regularly.

When raising small river crabs, you should first choose a suitable feeding container, and then use the tap water that has been exposed to the sun for a day to raise small river crabs, you can put sand and stones in the tank, and you can also plant a small number of aquatic plants to create a more comfortable environment for small river crabs.

When the small river crab is not fully adapted to the environment, the amount of feeding should not be too much, to avoid the impact on the water quality of the eaten, it is best to add algae and snails to the tank, the small river crab can also eat the algae and snails when they are hungry, and it can also play a role in stabilizing the water quality. It is best to change the water every day or two to ensure the cleanliness of the water quality of the small river crabs and avoid the small river crabs from getting sick.

The living habits of river crabs

1. Habitat mode

River crabs like to inhabit freshwater lakes and rivers with clear water quality and abundant aquatic plants. There are two ways to inhabit it: seclusion and burrowing.

2. Eating habits

River crabs are omnivorous crustaceans, and their animal food includes fish, shrimp, snails, mussels, earthworms and aquatic insects. Plant foods include goldfish algae, weed, elos, black algae, eyeweed, bitter grass, duckweed, filamentous algae, water hyacinth (water hyacinth), water peanut (drought-loving lotus seed), pumpkin, etc.; Concentrate feed includes soybean cake, vegetable cake, corn, wheat, rice, etc.

3. Adaptation to temperature

River crabs have a large range of adaptation to temperature, more than 1 and below 35 can survive, but their adaptability to high temperature is poor, in the waters above 30, in order to avoid high temperature, the proportion of river crabs burrowing is greatly increased.

To raise river crabs at home, you need to provide a quiet and comfortable environment, and you can put some stones, fine sand and aquatic plants in the water. You can also put some snails in the water to purify the water quality, and you can also supplement the nutrition of river crabs. Usually you can feed nematodes, offal, etc., you need to control the amount and time of food, change the water frequently, and maintain a certain amount of light.

To raise river crabs at home, you need to prepare a suitable feeding container, then put an appropriate amount of stones and fine sand in the feeding container, and then plant some aquatic plants in it. After that, tap water that has been dried for a day needs to be poured into the container to provide a comfortable living environment.

Start feeding with a small amount and create a quiet atmosphere for the crabs to avoid being frightened. In order to prevent the river crabs from starving, you can put some snails in the container, which can not only purify the water quality, but also satisfy the hunger of the river crabs.

Secondly, you can also give river crabs red worms or other animal offal, but you need to pay attention to the amount of food, basically you need to control the feeding time to half an hour. It is necessary to change the water frequently, and let the river crabs bask in the sun appropriately to promote growth.

1. Pond preparation.

Breeding ponds should be selected in a place with abundant aquatic plants, clean and clear water quality, and full of sunshine, and the area of the pond should be determined according to the number of their own breeding. Generally in about 3-8 acres, the water should not be too deep, about m, there is a good drainage and irrigation system, the pond is best hard clay, to remove the thick silt at the bottom of the pond. Set up anti-escape equipment around the pond, and in order to reduce the incidence of disease in the breeding process, the pond should be cleaned and disinfected when stocking crab seedlings.

15 days before stocking, quicklime was used for sprinkling and disinfection of the whole pond, and the dosage per mu was about 75 kg. Quicklime can not only kill the germs in the pond, but also effectively increase the calcium ions in the water body and improve the bottom of the pond.

2. Select seeds and put seedlings.

When choosing crab species, you should choose excellent and pure varieties, and you can't choose miscellaneous crabs, injured or sick crabs, or mutilated limbs. Crab species should be well-grown, well-developed, with complete appendages, no injuries and no differences in size. The purpose is to ensure the quality and survival rate of river crabs.

In order to let the crab seedlings have an excessive adaptation period, a temporary breeding area is set up in the pond, which accounts for about 1 5 of the entire pond. Pay attention to the stocking density, the density should be moderate, to ensure the normal growth and development of river crabs, and control the density at about 2,000 per mu. The stocking time is generally around the beginning of spring.

3. Feed feeding.

When breeding river crabs, it is necessary to feed some feed appropriately, because only the river crabs can not meet the growth and development of river crabs and achieve the purpose of high yield. After stocking crab fingerlings, when the water temperature in the pond reaches 11 degrees Celsius and above, it needs to be fed manually. When putting it, it is necessary to feed the early concentrate, the middle coarse material, and the late meat feed, and in the spring, a small amount of paste bait should be fed, and in the summer, it is necessary to feed the plant-type feed.

After August, it is necessary to start to increase the amount of animal meat, the main purpose is to promote the development of gonads, increase the weight of river crabs, and make their meat more delicious.

4. Water quality management.

Water quality has a very important impact on the growth and survival rate of river crabs, so it is necessary to do a good job in water quality management. When stocking crab fingerlings, it is necessary to ensure that there is a certain fertility in the water, and the fertility cannot be reduced, so water should be added at least once a week in the breeding. In addition, the water level should be deepened as the temperature rises, and the water level should be at least m in July, and the frequency of water changes should be increased or decreased when the temperature rises.

In summer, the water should be changed at least once a month from May to June, and at least once a week from July to August. Each time you change the water, you don't need to change the whole pool water, you can change about 30%, and you also need to splash quicklime regularly. It's about once every 15 days, and the effect was mentioned earlier.

Construction of ponds: Ponds are built in locations with sufficient water sources, good water quality, and convenient drainage and irrigation. Planting aquatic plants:

Aquatic plants such as duckweed, water hyacinth, and water lotus are planted in the waters. Stocking crab seedlings: Soak the crab in water repeatedly and wait for it to adjust to the water temperature before putting it in the pond.

Daily management: Regularly sprinkle quicklime into the pond to improve water quality.

1. Build ponds

River crab is suitable for breeding in the position of sufficient water source, good water quality, convenient drainage and irrigation, the soil at the bottom of the pond is suitable for clay, sand or sub-sandy soil, the silt at the bottom can not exceed 20 cm, and the surrounding cement board is used to prevent escape, and the pond is disinfected with quicklime half a month before the seedlings.

2. Plant aquatic plants

The number of aquatic weeds and benthic organisms in the pond determines the yield of river crabs, and aquatic plants such as duckweed, water hyacinth, water lotus, goldfish algae, and dead grass should be planted in the water area when breeding, and aquatic plants such as duckweeds can not only supplement vitamins for river crabs, but also play a shading role to meet the growth habits of river crabs.

3. Stocking crab seedlings

Pick out the crab seedlings with neat size, complete steps, strong physique, active crawling, no injury and no disease, and then put them into the water to soak for 2-3 minutes, take them out for 10 minutes and soak them again, repeat the operation 2-3 times, and wait for the river crabs to adapt to the water temperature and put them into the pond to improve the survival rate.

4. Daily management

River crabs in the breeding period to artificial feeding feed, adhere to the refined, green, coarse reasonable combination of the principle, of which concentrate accounted for 40%, aquatic weeds accounted for 35%, other plant feed accounted for 25%, usually the pH value of the pond water is maintained between, regularly splashed quicklime to improve water quality.

1. If conditions permit, buy a large fish tank, install an aeration pump, and put some aquatic plants, stones, bottom sand and other simulated natural environment in the fish tank, and it is best to put some small fish and shrimp (food for river crabs).

2. In a small fish tank, put some stones, sand and a small amount of water (half of the body of the crab crossing the river at the water level).

3. Note: If you use tap water, you should put the tap water for a period of time before releasing river crabs, because tap water contains residual chlorine, and river crabs will not live long.

4. Food of river crabs: dried shrimp, dried fish, bread worms, lean meat, cabbage, etc.

River crab is the most important freshwater crab in our country, is the taste of aesthetic nutrition is extremely rich, due to the harmonious adaptability is strong, the breeding range is wide, the scale of breeding has increased rapidly in recent years, bringing good economic benefits to farmers, the crab pond conditions are sufficient water, the water quality is good, only the area of the water is consistent, five acres is a water depth, with the same meter as good, the bottom of the crab pond is the best quality, for the sand and gravel soil with good performance, is conducive to the growth and reproduction of aquatic weeds against tin animals and plants, the river crabs provide natural feed, The thickness of the silt is generally no more than five centimeters!

1. Prepare the container. When raising river crabs at home, first prepare a 30-50 cm high plastic bucket to ensure that the inner wall is smooth to avoid crabs escaping, and then put the purchased small crabs into the plastic bucket, pay attention not to stack, 4-5 is appropriate.

2. Water quality management. After the crab is put into the bucket, it is necessary to inject clean river water, add water to half of the crab's body, play a moisturizing role, if the water level is too high, the crab will suffocate due to lack of oxygen and die, in the later breeding process, change the water once every 1 week.

3. Bait selection. In the process of raising crabs, you can feed animal bait such as bloodworms, dried shrimp, snails, mussels, etc., supplemented by plant bait such as aquatic plants, pumpkin, potatoes, etc., and feed them once in the morning and evening, and the crabs will grow better.

4. Breeding management. If you keep crabs at home for a long time, you also need to put easy-to-survive aquatic plants in the bucket, such as black algae, bitter grass, elophylla, etc., which can not only purify the water quality, provide a quiet environment for the crabs, but also serve as bait for them to eat.