How do hairy crabs survive the winter?

September 23 is the fishing day of Yangcheng Lake hairy crabs, in addition to those that can be listed on the market, those that do not meet the specifications have to survive the winter. Do you know how hairy crabs spend the winter? How to breed it?

How do hairy crabs survive the winter?

Hairy crabs spend the winter through hibernation, but they still eat as usual in winter. And hairy crabs close many organs during hibernation and do little activity except foraging, which can reduce energy consumption and survive the winter safely.

Second, how to raise overwintering hairy crabs?

1. Culture pond

The overwintering pond of hairy crab in Yangcheng Lake should be soil pond, not cement pond or brick pond. In the earth pond, there should also be small mounds above the water surface to provide conditions for Yangcheng Lake hairy crabs to dig holes in order to use caves to resist the cold. Second, Yangcheng Lake hairy crab overwintering pond should appropriately raise the water level to achieve deep-water overwintering.

two。 Water temperature

The depth of the water in the pool should reach 1-1.5 meters, and try not to freeze the water. In some areas of the north, the climate is cold and the temperature is very low. Plastic greenhouses can be used to make Yangcheng Lake hairy crabs survive the winter safely. An appropriate amount of salt was added to the overwintering pond to reduce the freezing point and meet the physiological needs of Yangcheng Lake hairy crabs. The salinity should not exceed 0.3%.

3. Feed

In the previous stage of feeding, the bait should be mainly plant-based food. Such as soaked or cooked wheat, soybeans, sweet potatoes, vegetables and so on. The daily feeding amount accounts for about 5% of the crab weight, and it is fed once in the morning and once in the afternoon, from 10:00 to 11:00, 3 parts of feed, and 7 parts of crab weight from 4 pm to 5 pm. In the later stage of feeding, the protein content of animals in food should be increased appropriately, and small miscellaneous fish and shrimp, snail clam meat, formula feed and so on can be fed appropriately.

4. Administration and Management

More water plants should be distributed in the overwintering pond, and at the same time, some firewood and grass should be spread on the ridge of the pool to cover the snow with the wind, so that the snow water can not flow directly into the pool. In addition, it is necessary to do a good job in disease prevention and control of hairy crabs in Yangcheng Lake.