At present, the production of crabs has shifted from artificial breeding to artificial breeding. Because crabs have a good adaptability, crabs can be stocked in general freshwater lakes, rivers, ponds and rice fields. In general, 500 grams of crab seedlings are put in the year, and 500 kg of crabs are produced in the second year.
Crabs just bought back, due to excessive physical consumption, are vulnerable to fish and shrimp in the water, and can be temporarily cultivated in cages for about a week. After being dehulled and transformed into young crabs, they can be put into waters for breeding. . However, care should be taken to prevent water snakes and water mice from invading.
If a large area is extensively bred, no special management is generally required. If it is a pond intensive culture, it is better to add a 30-cm-high plastic film wall around the pond to prevent the young crab from running away. And pay attention to put the right amount of feed and often change the water quality.
After the crabs mature, they can be caught. The general fishing methods are as follows: Mesh can be used to fish crabs with a mesh of 3-5 cm. To select a water area with a flat bottom and no debris to catch, sprinkle wheat grains and soaked grains, and then spread the nets 1 hour after bait. The second is a crab cage. A variety of cages are woven from bamboo poles, but one point is the same. All of them must be filled with 1-3 funnel-shaped inverted beards to prevent crabs from escaping. The bait is placed in a cage and placed in the water every 3-4 meters. Sooner or later, each can receive one crab. One person can operate 50-100 crab cages. The third is the crab card. Use wire to make a ring about 5 cm in diameter. Hang a string of animal meat and boiled corn on a ring and hang it in water. Between the card and the card is about 1 meter. Normally work at night, start the card after half an hour. Under normal circumstances, one person can operate 100 crab cards.
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