How to raise hairy crabs, how to raise hairy crabs

Hairy crab is a type of river crab, and the scientific name of river crab is Chinese mitten crab. In China, from the south of the Liaohe River to the Pearl River in the north, it is widely distributed on the long coastline, among which the hairy crabs produced by the hairy crabs of Taihu Lake, Gaoyou Lake and Yangcheng Lake hairy crabs in the lower reaches of the Yangtze River are the top grades, and the Yangtze River water system has the largest output and the most delicious taste.

There is a certain technical aspect of breeding hairy crabs.

To put it simply, to breed hairy crabs, you need to choose some excellent crab seedlings with high survival rate for breeding. It is recommended to use lake water for aquaculture, select an area with high water quality as the breeding area, and set up fences and sluices. After that, some aquatic plants are planted in the water to improve the water quality, and crab seedlings are put into it.

When breeding, live small fish should be used regularly to feed, so as to ensure that hairy crabs get sufficient nutrient supplements and grow better.

How to raise hairy crabs.

Hairy crabs are lake crabs, can be freshwater aquaculture, just find a water area that communicates with the lake water, trim it into a pond, do a good job of drainage and anti-crawling measures, and then select vigorous and high-quality hairy crabs into it, and then feed some small fish, small shrimp and other food, and properly breed some aquatic weeds, which can ensure the survival of hairy crabs.

How to raise hairy crabs at home for a few days without dying.

Generally, the hairy crabs bought home will be eaten as soon as possible in a short period of time, and there is no need to raise them according to the above methods, and the following measures can be taken to temporarily raise:

1. Refrigeration: 3 days.

1) Select the vigorous hairy crab, touch the eyes of the hairy crab with your hand, if the reaction is not sensitive, eat it first, and should not be preserved, otherwise it is easy to die.

2) Tie the feet and tongs of the hairy crab with cotton rope or palm leaves to reduce the physical exertion of the hairy crab.

3) Then put it in the refrigerator of the refrigerator, and the temperature is controlled at about 5-10 degrees Celsius.

4) Cover with a wrung out wet towel to keep the humidity and moisture on the hairy crab's body.

5) Observe it every day, and pick out and eat the ones that are lacking in vitality, and the hairy crabs with full vitality can continue to be preserved.

2. Temporary storage in plastic buckets: 3-5 days.

1) Same as the first step of the refrigeration method, it is necessary to pick hairy crabs with good vitality and store them first.

2) Put the hairy crabs into plastic buckets and basins in turn, and do not stack them.

3) Then add water to half the height of the hairy crab's body, which plays a moisturizing role, but the water can not bury all the hairy crabs, otherwise it is easy to die of lack of oxygen.

4) Bucket basin does not need to be covered, put in a cool place, check the hairy crabs every day, and eat them as soon as possible if they are not energetic, usually when the temperature is not high, the hairy crabs may be stored for more than 5 days.

3. Bathtub recuperation: more than 7 days or more.

1) Also pick out the hairy crabs with good vitality for preservation.

2) Gently pour the hairy crab into the bathtub.

3) Fill the water until the hairy crab stands up on its eight legs and can breathe on the surface of the water.

4) According to the storage time and quantity, a small amount of small fish and shrimp are put in, and the storage of hairy crabs in this method can generally exceed 7 days or longer, and the survival rate of good quality hairy crabs can reach more than 95%.

What kind of water should be used to raise hairy crabs.

Lake or river water.

Hairy crabs do not belong to the seafood category, is a kind of lake crab, just need fresh water to raise it, usually with the water in the waters of rivers and lakes is fresh water, you can get a little over to temporarily raise hairy crabs, but do not be the same as raising sea crabs, add salt to them, if the salt concentration is too high, it will speed up the death of hairy crabs, and do not use tap water, because it contains chlorine and other harmful substances, it will also cause the rapid death of hairy crabs.

Hairy crab temporary rearing water temperature.

The room temperature should not be lower than 5 degrees Celsius.

Hairy crabs will enter a state of hibernation when the temperature is 5 degrees Celsius, if the temperature is lower, hairy crabs will have the risk of frost damage, so in order to ensure the freshness of hairy crabs during the temporary breeding period, the temperature should be adjusted above 5 degrees Celsius, and the best temperature is about 15 degrees Celsius.

Water quality regulation: When breeding hairy crabs, keep the depth of the pond water between 70-80 cm. Regular feeding:

Hairy crabs are fed at 5 a.m. and 8 p.m. every day, and the feeding amount is 4% of the total body weight. Pond disinfection: Regularly sprinkle microbial agents on ponds to remove nitrites.

Regular patrols: Patrol twice a day to prevent hairy crabs from escaping.

1. Water quality regulation

In the process of breeding hairy crabs, the depth of the pond water should be kept at about 70-80 cm, to create a good growth environment for it, in the hot summer, to inject water into the pond, keep the water depth between 110-120 cm, and find that the water quality is turbid, the visibility is too low, to replace the clear water for the hairy crabs, and the amount of water exchange is 20%-25% of the total pool water.

2. Feed regularly

Hairy crabs are nocturnal during the day, during the breeding period to choose the feeding time according to the habit, 5 o'clock in the morning, 8 o'clock in the afternoon hairy crab activities are frequent, feeding bait can be carried out at this time, and the first half of the main feeding plant feed, with animal feed, in the second half of the year to animal feed, plant feed as a supplement.

3. Pond disinfection

Hairy crabs mostly live at the bottom of the pond, and the bottom of the pond is piled up with food residues and feces, which is easy to produce nitrite, resulting in the poisoning and death of hairy crabs, so in the process of breeding, it is necessary to regularly sprinkle microbial preparations on the pond to eliminate nitrite, and to splash lime water on the pond to remove harmful organisms.

4. Regular inspections

Hairy crabs are good at burrowing, climbing, during the breeding period to regularly inspect the pond, and for the pond to strengthen the purse seine or anti-escape device to prevent hairy crabs from escaping, and in the process of inspection, found that the hairy crabs with poor growth and infection of diseases, they should be fished out in time and fed separately to avoid large-scale infection.

The breeding method of hairy crabs is as follows: (taking crab farming in reed flats as an example).

1. The breeding area of hairy crabs: generally 50-100 acres is appropriate. The area is large, the size and quality of the commercial crab are good, and the cost is low. On the contrary, the smaller the area, the worse the size and quality of the crabs raised, and the higher the cost. But the area should not be too large.

2. The stocking density of hairy crabs: the pond should be cleared before stocking. The stocking specifications require an average of 2500-3200 animals per mu. At the same time, according to the water conditions, some grass carp, silver carp, bighead carp, etc., with an average of about 200 per mu.

3. Bait: mainly natural animal bait and plant bait, supplemented by artificial bait, once a day, mainly natural bait and small trash fish in the early stage, and concentrate feed in the later stage.

4. Anti-escape: In order to prevent the escape of river crabs, the cal-plastic board can be fixed on the embankment with bamboo piles, the cal-plastic board is 90cm high, buried in the soil 25 cm, and then the local embedding is made with soil.

5. Fishing: Catch with pumped dry ponds, or catch with lights at night.

Methods of raising domestic hairy crabs:

1. Prepare containers: Prepare a separate container for domestic hairy crabs, and if it is a short-term breeding, you can also use a basin and a sink.

2. Water quality: The tap water for breeding hairy crabs should be dried first, and it can be used after 2 days of exposure.

3. Feeding: For short-term breeding of hairy crabs, you do not need to buy special food, you can feed some grain crumbs, rice, millet, etc.

4. Change the water: For family breeding hairy crabs, it takes about 3 days to change the water, and a quarter can be replaced each time.

To raise hairy crabs, it is necessary to prepare suitable breeding grounds to ensure that the water quality is clean and to avoid hairy crabs from getting sick. In summer, hairy crabs breed, you can feed it more corn, pumpkin and other nutritious feed, in winter hairy crabs grow meat, you can feed hairy crabs to eat earthworms, snails, fish and shrimp and other animal feed, and pay more attention to water change in ordinary times.

When raising hairy crabs, you need to prepare a breeding ground with a large space, it is best to plant some aquatic plants, and ensure that the water for raising hairy crabs is clean to avoid the disease of hairy crabs caused by unclean water.

Summer is the time for hairy crabs to breed, so they need to be fed some corn, pumpkin and other plant feed, and in autumn, when hairy crabs grow meat, you can feed more hairy crabs to eat earthworms, snails, fish and shrimp and other animal feed.

In normal times, it is necessary to avoid hairy crabs getting sick, and it is necessary to change the water frequently to avoid not changing the water for a long time, breeding more bacteria, and infecting hairy crabs.

1. Water quality adjustment: When breeding hairy crabs, the depth of the pool water should be kept between 70-80 cm.

2. Regular feeding: Hairy crabs are fed at 5 a.m. and 8 p.m. every day, and the feeding amount is 4% of the total body weight.

3. Pond disinfection: regularly sprinkle microbial preparations on the pond to remove nitrite.

4. Regular inspection: Patrol twice a day to avoid hairy crabs escaping.