Beanie crab has just finished molting, what do you need to pay attention to?

Beanie crab, scientific name Tan's mud crab, can be raised in a similar way to chili crab.

Tan's mud crab lives in the mud mud of the soda environment, that is, the estuary of the river, half fresh water and half seawater, and a certain proportion of sea salt can be added when raising (** There are sea salts used to match seawater to marine organisms). Tan's mud crab is best raised with the mud of its origin, but the mud is not beautiful and may contain all kinds of insects, and the mud crab will hide in the mud and be difficult to see, so it can also be arranged in a half-water and half-land arrangement.

The arrangement of half water and half land is as follows: the sand in the tank is arranged at an angle, pour water with a certain proportion of sea salt on the shallow side (the water can be tap water for 3 days, or you can buy bottled mineral water directly), pay attention to the water height not to exceed the crab, change the water once a week and clean up the bottom sand and food residues. Tan's mud crabs do not live long without a landing platform, so be sure to provide them with a landing platform.

Feed Tan's mud crab feed should not be too large, be sure to use powdered feed, such as spirulina powder and shelled shrimp eggs, because they are eaten through filter feed, so these feeds should be dissolved in water (it is said that the lack of algae food will make it fail to shell and die, and the feed should contain algae components). Feed once a week.

The feed must not be overfed, which will lead to eutrophication of the water body and the breeding of protein worms, once the outbreak is very disgusting, you must take out the crab and then boil the water to clean the whole tank.

If you have the conditions, you can set up a few dodges for the crab, not too much.

The sand should not be arranged too high, mud crabs often climb the wall, and the wall is low and the sand is high. Prison.

Bastov still admires Luo Ting so much that he understands every word he says. Luo Ting rarely noticed him. He was overjoyed to spend a morning with him analyzing all sorts of major issues and tasks of world significance, but then he ignored ......Obviously, his search for a pure and loyal heart was only lip service.

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All the people of Daria Mikhailovna's family are obedient to Luo Ting, and every small wish of him can be fulfilled. Every day's schedule depends on him, and every ride is indispensable for him. However, he is not enthusiastic about all kinds of whimsical outings or whimsical entertainment, and participating in these activities is like an adult participating in a children's game, with a slightly boring accommodating mood.

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Summary. I used to raise hairy crabs at home, and every time they molt, they grow some new meat and make them fatter. Hairy crabs can grow a certain amount of meat each time they molt, generally speaking, they can grow 2-3 grams of meat per molt, but this depends on the size of the crab.

In addition, the health condition of the crab can also affect the weight gain after molting, and healthy crabs will gain more weight after molting than unhealthy crabs. Expansion: In addition, the molting process of hairy crabs will also consume a lot of nutrients, so during the molting period, it is necessary to provide sufficient nutrients to the crabs to ensure the healthy growth of crabs.

I used to raise crabs at home, and every time they molted, they would grow some new meat and make them fatter. Generally speaking, each molt can grow 2-3 grams of meat, but this depends on the size of the crab. In addition, the health condition of the crab can also affect the weight gain after molting, and healthy crabs will gain more weight after molting than unhealthy crabs.

Expansion: In addition, the molting process of hairy crabs will also consume a lot of nutrients, so during the molting period, it is necessary to provide sufficient nutrients to the crabs to ensure the healthy growth of crabs.

Fellow, I really didn't understand, I can be more specific.

Hello, how big a hairy crab can grow each time it molts depends on its size, under normal circumstances, hairy crabs can grow 2-3 cm each time they molt. In addition, after each molt, the hairy crab will become larger, and the weight of the body will also increase, but the degree of each molt is different, so the length will also be different. Hope mine can help you.

Crabs molt about 18 times in their lifetime.

Crabs (pángxiè) belong to the class Mollusk, decapods, and are crustaceans whose bodies are protected by a hard shell and breathe by gills. Taxonomicly, it is the same animal as shrimp, lobster, and hermit crab.

The vast majority of species of crabs live in the sea or near the sea, but some inhabit freshwater or land. Common crabs include pike crab, open sea pike crab, blue crab and Chinese mitten crab (river crab, hairy crab, clear water crab) and so on. There are about 4,700 species in the world and about 800 species in China.

It can be divided into 6 categories: Dromiacea, Archaeobrachyura, Oxystomata, Oxyrhyncha, Cancridea, and Brachyrhyncha. Common genera related to male crabs, pike crabs, stream crabs, fiddler crabs, mitten crabs and so on.

I don't know! I haven't observed! This date is not necessarily.

Crabs are crustaceans, so the shell is taken off according to the development of the body, that is to say, some crabs have better nutrition, they will have to be taken off once every 2 weeks, and some may take 2 months and if they hibernate, they will not take off * 0 *

1.When the river crab sheds its shell, it will produce natural killing, and some river crabs will be eaten by the river crab that has not shelled during the shelling period, which will lead to an increase in mortality, and the use of shelling can make the river crab in the soft shell stage quickly become a hard shell in a short period of time, and quickly become stronger, thus avoiding the situation of killing each other.

2.Hullin can help river crabs to successfully and smoothly dehuddle, improve the success rate of shelling, and thus improve the survival rate.

3.Hulling can promote the speed and frequency of shelling of river crabs, and river crabs grow up once they shed their shells, and increasing the speed and frequency of shelling is one of the keys to raising large crabs.

River crab chistin, a must-have for crab farming.

Take the crab to another pot when molting, otherwise.

The shell of a crab cannot expand as its body grows, so the way to overcome the problem is to remove the shell. Before shedding the shell, the crab first absorbs the calcium carbonate in the hard shell into the body fluid, and when a layer of soft wrinkles grows in the shell, the old shell cracks and falls off, and the body then stretches the folds into a new shell, and injects calcium carbonate to harden it.

Crabs shed their shells about 18 times in their lifetime, and big-eyed larvae to crab seedlings shed 5 times. Crab fry to larvae crab shelling 3 times; Shelling of young crabs to juvenile crabs 5 times; Juvenile to adult crabs shell 5 times. Each shelling is the result of the growth and development of the crab, and when the body tissue grows and nutrients accumulate to a certain extent, it is necessary to molt (skin).

Under normal circumstances, every time the shell (skin) is molted, the crab grows significantly, but the shelling does not necessarily grow, for example, when the nutrition is insufficient, the crab shelling will have negative growth. At the same time, it can also remove parasites and attachments attached to the carapace, and can regenerate the residual limb.

The shelling of crabs is extremely important for the crab itself, from the crab itself, the crab shelling is not good, the crab grows poorly, there are many crabs with legs, and the heavy will die due to the failure of shelling; From the perspective of economic cost, poor shelling will affect the size and time to market of crabs.

The process of unshelling crabs :

Hulling interphase: In the shelling interphase, the crab shell calcifies, absorbs calcium and trace elements, and the river crab will eat a large amount of food to accumulate energy substances and trace elements, and prepare materials for shelling. (At this time, nutrients should be added to the bait, in addition, insufficient calcium and trace elements will also affect the shelling efficiency of river crabs).

Pre-shelling: In the early stage of shelling, the dermis layer will be separated from the epidermal layer, the epidermis above the old shell will begin to be absorbed, calcium and trace elements will be absorbed into the bloodstream, the new epidermis will begin to form, and the intake will decrease, which is the formation of the second shell. When the old shell is absorbed, the new epidermis separates from the old shell significantly, and feeding stops.

The new epidermis is secreted and the crab begins to absorb water and is ready to shed its shell. (At this time, the freshness of the water source will affect the shelling of river crabs).

Hulling period: After the body absorbs a large amount of water, cracks will appear in the breastplate and abdomen of the river crab, and the river crab will bounce its body out of the old shell, this process is only a few seconds or minutes. (Accumulation of nutrients in the early stage is the key).

Later stage of shelling: when it first comes out, the new shell of the river crab is soft and elastic, and the river crab begins to absorb a large amount of water to fully extend the new shell to the maximum scale, and the vitality is weak at this time, and it does not feed. This process is also shorter. (This is the time when river crabs are most vulnerable, and a quiet environment is necessary).

Follow-up stage: the carapace of the crab begins to calcify, and begins to absorb a large amount of calcium and trace elements, this process is determined by the calcium content and trace element content in the water body, the lack of trace elements will make the soft shell of the river crab, the hard shell time increase or can not be completely hard shell, increase the risk of death of the crab during the shelling period. When the shell hardens and can support the body, the crab will expel the excess water absorbed by the body and start feeding, completing a shelling cycle.

Crabs are animals that need to shed their shells once a year, otherwise it is difficult for the small shells to maintain the growth of the body. Crabs, which are in the shelling stage, are easily attacked by a set of species.

So be sure to take good care of the crab in the canteen, otherwise it will be eaten up by other fish.

The first shell is shelled in early April, the second shell is shelled in mid-to-early May, the third shell is shelled in mid-June, the fourth shell is shelled in mid-July, and the fifth shell is shelled in mid-to-late August.

1. The shelling time of river crabs.

1. The peak period of the first shell should be on April 3-8.

2. The peak period of the second shell should be from May 5 to 10.

3. The peak period of the third shell should be June 10-15.

4. The peak molting period of female crabs in the fourth shell should be from July 10 to 15; The peak molting season for male crabs in the fourth shell should be on July 25-30.

5. The peak molting period of the female crab of the fifth shell should be from August 15th to 20th; The peak molting period of male crabs in the fifth shell should be from August 30 to September 10.

Second, the judgment of river crab shelling.

1. Hulling law: each farmer needs to master the approximate shelling time of river crabs for 5 times. During the production process, the body color of the river crab before shelling is dark, and the body color is yellow-brown, black-brown, and the abdominal carapace is rusty. After shelling, the body color of the river crab becomes lighter, the abdominal carapace is white, there is no rust, and the steps are soft.

2. Individual: After shelling, the body will increase by about 20% and the weight will double compared with the individual before shelling. The discovery of river crabs with larger individuals and lighter body color indicates that the river crabs have shed their shells.

3. Empty shell: An empty shell was found during the pond patrol, indicating that the river crab had shed its shell.

4. Eating situation: river crabs generally do not eat before shedding their shells, and after a few days of bait, if they find that the remaining amount of bait increases greatly (in the case of no disease), it indicates that river crabs are about to begin to shed their shells.

3. Precautions for the shelling period of river crabs.

1. Before shelling, it is appropriate to increase animal bait and add hullin. The shelling period of river crabs is long, it is easy to cause cannibalism, and the survival rate will be low, so it is necessary to shorten the shelling time, before the shelling comes, not only to increase the animal bait, but also to mix chisitin in the bait, and strive to synchronize the shelling.

2. Increase the calcium ion content appropriately when shelling. It is found that individual river crabs have shed their shells, and ionized calcium or quicklime can be sprinkled with 5-10 catties per mu to increase the content of calcium ions in the water.

3. Reduce or stop water changes. The water level needs to be kept stable during the shelling period, and there is generally no need to change the water. If it is really necessary to change the water, it should be done with a slight flow of water, not large ups and downs, and prevent stress reactions.

4. It is forbidden to use insecticidal and fungicidal drugs. At the same time, the pond environment is kept quiet during the shelling period to avoid human alarm.

Of course. We've all seen crabs of all sizes, and the small ones have to shed their shells every time they grow up.

Crabs and shrimp are molting, and then the soft new shells slowly ripen and harden.

Yes, it will be shelled regularly to facilitate growth.

Do crabs shed their shells? When the crab grows to a certain point, it will naturally shed its shell.

Freshwater river crabs are raised from the year of buckle crabs, and after about 15 days of normal temperature to replenish physical energy and material accumulation, they begin to shed their shells for the first time. After about five days of hardening of the shell chelated crab tooth gastrolith, the function of various organs and tissues was restored, and the feeding was gradually filtered and pinched, and the feeding was completed after one week, during which the feeding was observed.