When does crayfish usually shell? What should be paid attention to in the management of this period?

The growth of crayfish depends on shelling, and the shelling rate is related to the growth stage and water quality environmental factors of crayfish. Shrimp need to accumulate a considerable amount of energy before each molting, even so, after molting is the weakest period of shrimp body, easy to be invaded by disease source, so every molting is a lobster life crisis. Crayfish usually a few months shell? What should we pay attention to during this period of management?

What month do crayfish usually shed their shells?

Around May, lobster molting peak period, and lobster molting process to dissolved oxygen requirements are higher. Shelling follows the lobster throughout its life. During its first year of life, a lobster undergoes ten molting cycles. Lobsters will continue to undergo molting approximately once a year until maturity. Mature lobsters may molt only once every three years.

II. Reasons for Crayfish Shelling Difficulty

1. The deterioration of water quality is manifested in the fact that the old shell is only half removed or the body shrinks after the old shell is removed;

2. Insufficient feeding, long-term hunger affects shelling, insufficient nutrition or poor feed is not easy to absorb;

3, stocking density is too large, dense crowding, mutual interference will prolong the shelling time or can not get out and die;

4, water temperature mutation, low temperature hinders shelling, high temperature will also delay shelling;

5. Drug influence: excessive application of drugs after indiscriminate use of antibiotics affects shelling or produces abnormal phenomena;

6, the light is too strong or the transparency of the water is too large, the water is clear to the end, so that the lobster does not shell all day;

7. It is more difficult to shed shell due to insufficient calcification of shell;

8. Parasites such as ciliates.

III. Precautions for crayfish shelling management

1. Preliminary work

As long as we do well in other links, we can ensure the normal molting of lobsters. What we have to do is a lot of work in the early stage, such as the conservation of water quality and water body, the planting of aquatic plants and aquatic plants, the disinfection of pond mouth, the elimination of natural enemies, etc. A good water quality can provide a better growth link for lobsters, a good weed can provide some bait for lobsters and a safe space for molting, these are all places we need to pay attention to.

2, appropriate calcium supplement

After the lobster enters the pond, we need to pay attention to the feeding of bait. During the lobster molting period, proper calcium supplement, and more food bait with high calcium content such as screws can be provided. When feeding, we must do a good job of matching, plant bait and animal bait, so as not to cause nutritional imbalance.

3. Observation of aquatic plants

In the breeding process, pay attention to the growth of aquatic plants and the dissolved oxygen content of water body. If the aquatic plants grow badly, it proves that the water body is too thin and needs fertilizer water. Because there is no good aquatic plants, shrimp cannot be raised well. Lobster's demand for oxygen is not very high. However, attention should also be paid not to let the water body lack oxygen for a long time. Hypoxia will lead to lobster not molting, and may lead to lobster in the molting process. Failure to molt due to hypoxia leads to death.

4. Pay attention to the shelling time of crayfish

Lobster molting is not a fixed time, not to say that the same batch of seedlings of the same specification put down, after a period of time together molting, but according to eating and other conditions, there are first and then, basically every day there will be lobsters molting, so, we remember that when there are lobsters in the pond, you need to observe more, do not blindly operate, such as disinfection, killing moss, etc., and lead to lobster death.