First, the selection of crab breeding artificial breeding of authentic Yangtze River crab crab species. Requirements: robust body, uniform specifications, complete crustacean appendages, no disease, no injury, no attachments, can quickly climb after falling to the ground.
Second, the crabs are suitable for winter stocking. Put the crab seedlings containing the crab species in the pool water for 2-3 minutes, then put them on the shore for 20-30 minutes, repeat 2 or 3 times, and allow them to suck enough water and put them in the pool. The crabs were soaked in 15X10-6 concentration of formalin for 20 minutes before stocking. Generally, 400-600 pieces of crab are stocked with 1200-1400 crabs per kilogram, and 600-800 pieces of 200-300 pieces of crabs per kilogram are generally reserved for large-water crabs.
Third, strengthen management
(1) Anti-escape. Inner pond is made of calcium-plastic board with smooth surface to prevent escape from the wall. Large water surface adopts a net barrier and a rigid plastic film at the end of the barrier.
(2) transplanting plants. Crab ponds were transplanted with aquatic plants such as peanuts, Vallisneria, Elodea, and Hydrilla verticillata. The coverage rate was above 40%.
(3) Water management. The water level in winter is kept above 1.5 meters.
(4) Appropriate feeding. During the winter, if the water temperature is above 4 °C, a small amount of chopped small trash fish, shrimp and other meat can be fed.
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