Crabs should control water temperature

When the water temperature changes drastically, crabs produce stress and are prone to diseases. For example, when the water temperature suddenly changes, the muscles of the crabs relax, the joints of the appendages become soft, and the joints become weak and even muscle necrosis. When the new water is added, if the temperature of the new water is more than 3° C. lower than the temperature of the pool water, the crabs are prone to have a cold. Death; In the hot season, when the water temperature is less than 50 cm above the water surface, the crabs tend to be precocious when the temperature exceeds 28°C for a long time. When the water temperature is lower than 10°C, the crabs will drill or drill into the silt for winter and affect the trapping. It can be seen that the relationship between crab and water temperature is very close, and the change of water temperature must not be ignored in the breeding process.
Then, how to control the temperature of crabs? First, transport crabs should try to maintain the original temperature and reduce the temperature difference. If crab crabs are transported, the temperature difference should be less than 2 °C; transport crabs, the temperature difference should be less than 5 °C. The second is to plant aquatic plants in crab ponds. The planting area of ​​aquatic weeds accounts for 1/3 to 1/2 of the total pond area, so as to facilitate the reduction of the water body temperature in the summer and prevent crabs from becoming precocious. The third is to raise new water can not be too fast too fast. The difference between the temperature of the refilled fresh water and the temperature of the crab pond water should not exceed 3°C. Fourth, trapping crabs should be carried out at temperatures above 10°C to prevent crabs from burrowing or drilling into silt to overwinter.

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