In autumn and winter, when the temperature drops below 10- 15, the adult shrimp begin to burrow and prepare for hibernation. Therefore, it is safe for strong adult shrimp to enter the cave for winter. But the limit temperature that lobsters can safely spend is -5? - 10。 Therefore, for young shrimps and crayfish in extremely cold areas, it is necessary to manually assist some facilities or control the water level to make lobsters safely spend the winter.

Small lobster cave

Water level control method;

This method is suitable for crayfish culture areas where the extreme temperature in winter will not be lower than-10 (or such low temperature occasionally occurs). When the temperature drops to 15 in autumn and winter, it is necessary to gradually deepen the water level in the crayfish culture pond to ensure that the water level in the crayfish culture pond in winter is above 1.2- 1.5 meters, but it is not easy to exceed 2 meters. When the water level of the aquaculture pond is deep, it can ensure that there is enough water temperature at the bottom, and the young and adult shrimps with poor physical strength can hide in the impurities such as aquatic plants and silt at the bottom of the pond for the winter. Farmers who breed crayfish in rice fields can properly place straws in the fields. In winter, the decay of straw in water will generate heat, and young shrimp can hide in the rotten straw for the winter. Pay close attention to the changes of water quality in aquaculture farms where aquatic plants are put in, change water appropriately and adjust water quality.

Shrimp pond with high water level in winter

Greenhouse law;

This method is suitable for any area, but it will increase the cost of crayfish culture and maintenance. Build a greenhouse around the aquaculture pond and cover it with plastic film. The greenhouse can keep the temperature in the greenhouse at 10-20 and higher in winter, and crayfish can safely spend the winter at this temperature. By adjusting the temperature in the greenhouse, out-of-season lobsters can be cultivated and raised in winter. By controlling the temperature in the greenhouse and adjusting the water level in the culture pond, crayfish can grow normally in winter. Deepening the water level will guide crayfish out of the hole to hatch crayfish larvae, and then feed them reasonably, so that crayfish seedlings can be listed early. This culture method can not only bring the economic benefits of out-of-season crayfish, but also ensure the safety of crayfish in winter.

Construction of crayfish greenhouse

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