CATDOLL : CATDOLL: How to feed hairy crabs

How to feed hairy crabs

1. Water quality regulation.

(1) When breeding hairy crabs, the water depth in the pond must be maintained at around 70-80cm to provide a good growth environment for them. In the hot summer, water must be added to the pond to keep the water depth at around 110-120cm.

(2) If the water quality is found to be turbid and the visibility is too low, be sure to replace the water for the hairy crabs with clean water. The amount of water replaced should be about 20%-25% of the total pond water.

2. Feed regularly.

(1) Chinese hairy crabs like to hide during the day and come out at night. During the breeding period, you must choose the feeding time according to their habits. The hairy crabs are very active at 5 a.m. and 8 p.m., so feeding them can be done at this time.

(2) In the first half of the year, you can mainly feed plant-based feeds, supplemented with animal feeds. In the second half of the year, you can mainly feed animal feeds, supplemented with plant-based feeds.

3. Pond disinfection.

(1) Chinese hairy crabs mainly live at the bottom of the pond, where food residues and feces accumulate, making it very easy for them to produce nitrite, which can cause poisoning and death of Chinese hairy crabs.

(2) Therefore, during the breeding process, microbial agents must be sprayed into the pond regularly to eliminate nitrite, and lime water must be sprayed into the pond to remove harmful organisms.

How to breed hairy crabs?

The hairy crab is a high-grade, high-nutrition, high-economic-value aquatic product. September every year is the season when the hairy crab is mature and plump. The female crab is plump, the crab roe is plump, the meat is tender and delicious, and you will never get tired of eating it! How can you raise a big and plump hairy crab? This still requires certain technical requirements, and you should focus on the following points: <a href='' target='_blank'><span style='color:#FF8000'>hairy crab farming</span></a> 1. The choice of breeding site. The site is best to choose a pond with a quiet environment and a source of running water. It is best to choose a natural lake wetland with no environmental pollution, lush aquatic plants, rich fish and shrimps, and this breeding environment is the best. The water surface is more than five mu, and the water depth is about 1.5 meters deep in the middle of the pond, and the surrounding shallowness is 1 to 1.2 meters. The shore is 20 to 30 centimeters. 2. Plant good aquatic plants. The aquatic plants are mainly lantern ball grass, mandarin fish grass, and water black grass floating aquatic plants. The role of water plants is to facilitate the hiding of crabs that have shed their shells. The friction of water plants helps shed their shells, and prevents other crabs and birds from eating soft crabs that have just shed their shells and have no mobility. 3. The pond is surrounded by a fence. The fence is 1.8 meters high and forms a "7" shape in the pond to prevent crabs from escaping. 4. The release of crab seeds. Buy crab seeds as big as buttons and release 600 per mu at the beginning. Big and plump hairy crabs 5. A few days before the first molting of the crab and after the molting, it is necessary to release 100 catties of screws per mu. After that, screws are released before and after the crab molts for the crabs to eat. As the crabs grow, the amount of screws released should be increased accordingly. This is an important measure for the crabs to grow quickly and have uniform specifications. Other foods are released according to conventional breeding. 6. Two or three days before the crab molts, ten catties of tea dregs are used per mu of water surface to be evenly spread throughout the pond until the tea dregs are stopped after the molting. The reason for doing this is to speed up the molting speed of the crabs and molt smoothly, so that the crabs will not die during the molting. Every molting of crabs is quite difficult and many crabs die during the molting process. The part of the crab shed during the molting increases in size rapidly, so if the molting is not timely, the crab will suffocate and die. Special attention should be paid to these details during the crab breeding process. If the details are well done, high-yield and large crabs can be achieved. The high-yield technology of crabs requires us to continuously observe, summarize and research to achieve it, and we must not stand still.

Many people know that raising hairy crabs is not an easy task. However, in addition to conventional pond farming of hairy crabs, there are actually many other ways to raise hairy crabs. If the management is in place, the economic benefits generated are also very good. The following editor will introduce several ways to raise hairy crabs for your reference.

1. Raising crabs on reed flats

(1) The area for breeding hairy crabs: Generally, 50-100 mu is appropriate. The larger the area, the better the specifications and quality of the commercial crabs, and the lower the cost. On the contrary, the smaller the area, the worse the specifications and quality of the crabs, and the higher the cost. However, the area should not be too large.

(2) Stocking density of hairy crabs: The pond must be cleaned and pests removed before stocking. The stocking specification requires an average of 2,500 to 3,200 crabs per mu. At the same time, depending on the water conditions, some grass carp, silver carp, bighead carp, etc. can be stocked, with an average of about 200 crabs per mu.

(3) Feeding: Mainly natural animal bait and plant bait, supplemented by artificial feeding, once a day. In the early stage, natural bait and small fish are mainly used, and in the later stage, concentrated feed is mainly used.

(4) Escape prevention: To prevent river crabs from escaping, the calcium plastic board can be fixed on the embankment with bamboo stakes. The calcium plastic board should be 90 cm high and buried 25 cm in the soil, and then partially embedded with soil.

(5) Fishing: Catch fish by draining the pond or by using light at night.

2. Cage-grown crabs

(1) Cage structure: The mesh is woven with polyethylene or galvanized iron wire, with a mesh size of 10*10mm. Wood is then used as a support to fully enclose the mesh and fix it on the support. A feeding platform is left at the mouth of the mesh. The size of the cage depends on the amount of crabs to be raised.

(2) Selection of the location for the cage: Choose a location with clear water, free from pesticide and fertilizer pollution, rich in aquatic plants and zooplankton, and relatively gentle water flow. The water depth should also be appropriate so that the crabs can have a place to hide from wind and waves.

(3) Stocking density: 20-30 one-year-old crabs per square meter.

(4) Management: Same as conventional breeding methods.

3. Enclose river crabs in large waters (this method can be used in lakes, harbors and other open waters)

(1) Enclosure area: usually 0.2-3 mu.

(2) Crab stocking: The time is from March to April, the size is about 60 per kilogram and the stocking density is about 30 per square meter.

(3) Feeding: Natural bait is the main feed, snails, low-value shellfish, earthworms, etc. are fed once every 10-15 days. Wheat cakes, vegetable cakes, corn cakes and other commercial baits are fed every 2-3 days.

(4) Daily management: During the breeding process, the climbing and feeding conditions of river crabs in the enclosure should be observed regularly. Any holes found should be repaired promptly. After strong winds and waves, the wooden stakes should be checked promptly and any loose parts should be reinforced in time.

1. Put the hairy crabs in water

The crab body cannot be completely covered. The water needs to be changed frequently, and some feed is needed for a long time, otherwise the hairy crab will become thin.

2. Refrigerate

Put the hairy crab (untied) in the refrigerator's fresh-keeping layer, then take a clean towel, half-wrung it and spread it flat on the hairy crab. The hairy crab will faint in a low-temperature environment, so it can be stored for a few days, but the longer it is stored, the worse the taste will be.