1, big pot feeding method
Crayfish are aggressive, so try to spread them out in a big basin, and put an appropriate amount of water in the big basin (the water surface should not be over the head of crayfish, which can be about 2-4 cm). This can not only reduce the number of deaths, but also allow crayfish to discharge their garbage. Crayfish prefer dark and humid places, and they can cover the basin with black plastic bags or other things. During the period of raising crayfish, they can be fed some green leaves, steamed bread and diced meat.
2, glass jar feeding method
After washing the lobster, pour it directly into a pool with an air pump or a glass jar for oxygenation. Don't put too much lobster. Change the water in the morning and evening. This storage method can store the lobster for 5-10 days.
Management process of cultured crayfish:
1, pond
The water depth of the pond shall be controlled between1-1.5m, the bottom of the pond shall be flat and the periphery of the pond shall be compacted to prevent the lobster from escaping, and the pond slope ratio shall be 1:2.5. Before stocking, use 100— 150kg of quicklime for pond cleaning and disinfection. After 3 days, the pond was flooded. After 10, apply 300-500 kg of decomposed organic fertilizer per mu of pond to cultivate plankton and provide bait for shrimp seedlings.
2. Stocking
If it is stocked in summer, 30,000 to 40,000 juvenile shrimps are stocked in each mu of pond, and the specifications are above 0.8cm; If it is stocked in autumn, every acre of pond will be stocked with10.5 million shrimp fry, and the specifications are above 2.5cm; If it is stocked in winter and spring, the pond should be stocked with1.5 ~ 20,000 shrimps per mu, with the specification of100-200 shrimps /kg.
If it is stocked in summer, it is generally carried out in the middle and late July of each year; If it is stocked in autumn, it is usually carried out from mid-August to September every year; If it is stocked in winter and spring, it is generally carried out in1February every year or in March-April of the following year. Before stocking, use 4% salt water bath 10 minutes or so.
Step 3: Feed
If it is July ~1October, the feeding amount is about 8 ~12% of the shrimp weight, and the dry feed or compound feed is 2 ~ 4% as a whole. In other seasons, the daily feeding amount is about 2-5% of the shrimp weight.
If it is July 7~ 10/October, feed it twice a day, in which the feeding amount is about 60 ~ 70% at night; if it is other seasons, feed it 1 time every day, and the specific feeding time is around sunset every day.
4. Management
The dissolved oxygen content is kept above 5mg/L, the ph of water body is controlled between 7 and 8.5, and the transparency of water body is about 40cm. Change the water every 15-20 days or so. If it is in high temperature season, change the water every 5-7 days, and the amount of water changed each time is about 20-30%, and every15 days or so, use10-15 per mu of pond.