1. Before the crabs are transported and transported, the crab shells and fishing tools are washed, sterilized and exposed to make them saturate the clean water. A layer of fresh water soaked in the bottom of the box is washed and the crabs are scattered in the box. Each box of crab seedlings 1 kg, the box stamped, put wet weeds. During transportation, on the premise of preventing direct air blow, maintain ventilation and ventilation, and evenly spray some water mist in time to avoid direct sunlight, high temperature and prevent vibration of the crab box from jolting, so as to ensure that the survival rate of crab seedlings reaches more than 95%.
2. After the crab seedlings were raised and raised, they were stocked at a density of 10,000 per square meter in cages. The main bait for the holding period is red worms and leeches, supplemented by surimi, artificial mixed feed and plant-based feed. Feeding 2 to 3 times a day, the daily feeding amount is 20% to 30% of the total weight of the juvenile crab. Feed 30% of the total amount of bait during the day and feed the remaining 70% at night. Juvenile crabs have a holding period of about 20 days and clam shells 2 to 3 times.
3. The large stocked crabs were raised in a cage and adapted to a new body of water. The young crabs were selected to be placed on the back of the cages, and the backs of the young crabs were exposed to white ash, strong whiteness, strong physique, complete appendages, no hard shell damage, and agile and responsive animals. Stocking densities range from 1500 to 2200/ha for crabs and 150,000 to 200,000/ha for crabs. The large stocking is mainly based on natural foods, supplemented with artificial diets of suitable size and water resistance. The whole growth period is 45% for animals (fine material), 30% for glutinous rice cakes (coarse material), and water grass (blue). Material) 25%. For specific feeding arrangements, the proportion of pre-investment, crude and green materials is 30:40:30, and the proportion of refined, coarse and green materials in the later period is 65:20:15. Generally sunny and more feed, less rainy days to feed.
4. Crab management block should have enough density, so that the block is stable, there is no gap, and at the same time should always check the nets to prevent damage to the nets, crabs fled.
5. Crab fishing Crab fishing period from the end of August to early November, the fishing tools are mainly cages and cages. The cage is made up of blocks, eight-character nets, body nets and small cages. It is generally 40 to 60 meters long and 20 to 30 meters wide. Blocking the water above the water, Ba Zi Wang and the first height of the body network, about 1 meter. The net gradually decreases inward from the head and converges with a small cage of approximately 0.5 meters and 0.5 meters. The small cages are generally 2 to 3 meters long. The cages are fixed with bamboos and the nets are used 1 to 2 times a day. The ground cage is a type of net with the net, 40 to 50 meters long, with a diameter of 6.5 mm reinforced into a 40 cm 50 cm, spacing 1 to 1.2 meters of the grid, and then tied into a polyethylene mesh cage cage A boxed net hole is set in a box cage to allow the crabs to enter but not to exit. The small cage is 10 meters long, with a diameter of 4.5 mm reinforced bar into 25 cm 30 cm, spacing of 0.8 meters of the grid, and then mesh into a cage, every day to receive. Capture up to the specifications of crabs, remove the holdings, and return the young crabs to the breeding area.
6. Adult crabs should be staggered in order to stagger the number of crabs to be caught, and the market price is relatively low. Different types of crabs should be classified and treated in different ways. The healthy crabs and disabled, different sizes of female and male crabs should be added separately to increase the weight of fat. . Short-term adoption of dry method, selection of ventilated and insulated rooms, laying of a smooth cement pool 2 meters high and an area of ​​3 square meters, laying the right amount of water plants at the bottom of the pond, putting it into crabs, spraying 2 or 3 times a day, feeding a small amount Fish and shrimp. For long-term holdings, temporary holding pools should be used. The water depth should be controlled at 1.5 meters, and water should be changed once a day. Food should be put on a regular basis to promote long-term weight gain.
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