How do crayfish survive the winter?

Crayfish is a kind of food that we often eat in our daily life. It is hard to change a glass of cold beer on a hot summer night and eat spicy and sour crayfish. Although crayfish are refreshing to eat, raising crayfish is not an easy thing, especially in winter. So how does crayfish spend the winter?

How to spend the winter with crayfish

In the natural environment, crayfish mainly pass through the cold winter by entering their own caves. In artificial breeding, it is also necessary to adjust water temperature, fertilize water, change feed and so on. Crayfish caves are generally 0.8-1 m in length and 4-6 cm directly. Most of the caves are concentrated on the "sunny side" of more than 10-20 cm of the water surface, with different shapes.

Crayfish are highly adaptable to temperature. They grow when the temperature exceeds 10 degrees, stop eating when they are below 10 degrees, and begin to drill holes to prepare for the winter when they are below 16 degrees. The body of crayfish contains astaxanthin, and the content of astaxanthin is positively related to its ability to resist the harsh environment, that is to say, the higher the content of astaxanthin, the stronger the ability to resist the harsh environment. However, in the winter when the temperature is too low, try to put some algae in the pond that can make the crayfish produce astaxanthin.

Matters needing attention of crayfish in winter

1. Water level: during the overwintering period, the water level in the pool should be kept above 1.5 meters to maintain the water temperature. If the water level is too shallow, it is necessary to replenish the water timely to prevent the lobster from frostbite to death.

two。 Water body: when the water quality is too fat, it is necessary to change the water timely, keep the dissolved oxygen in the water above 4kg/, and the transparency is more than 40 cm, so as to prevent crayfish from asphyxiation due to hypoxia.

3. Patrol the pool regularly: patrol the pool twice a day and take countermeasures in time if you find something unusual. Focus on the prevention and treatment of frostbite of crayfish.

4. Disinfection: every 10-15 days during the overwintering period, 20 kg per mu of quicklime is sprinkled in the whole pool to disinfect the water body, replenish calcium and prevent diseases.

The above is some knowledge about crayfish overwintering. Farmers who carry out crayfish farming must patrol the pond more in winter to avoid large-scale death of crayfish as far as possible.