The price of crayfish is doubled. How to breed freshwater crayfish in the market?

Freshwater lobster, also known as crayfish. In recent years, the price of crayfish has doubled, and the market demand is great. After several years of practice, the author thinks that the stocking of crayfish should pay attention to these matters:

Freshwater crayfish stocking

Tangkou choice: crayfish pond, the area should be moderate, generally in 20 Mu 50 mu. The ratio of pond to slope is larger, at 1 ∶ 2.5 to 1 ∶ 3, which is convenient for crayfish to live and breed, and at the same time reduce the chance of crayfish escape. The pond is rich in natural bait organisms and aquatic plants.

Thoroughly clear the pond: 10 days before the crayfish is released, drain the pond and clean the pond thoroughly with 100 kg of quicklime per mu. Kill enemy organisms and pathogens. 100ml 200kg organic fertilizer was applied per mu to cultivate bait organisms.

Ecological cultivation: plant water plants in shallow water around the pond, accounting for 40% of the pond area. Species include bitter grass, Elodea verticillata, hyacinth, water ponds, etc., which can not only feed crayfish, but also provide shelter and habitat for crayfish. In addition, the bottom of the pond can use water grass to build a haystack, put a pile every 5 meters, each pile 5MUE 10kg, sink at the bottom, put 15-20 piles per mu. The haystack is fastened with a rope, and the other end of the rope is fixed to the water.

Shrimp species selection: because crayfish artificial reproduction has not been fully mastered, crayfish seedlings are mainly natural reproduction, so shrimp selection is particularly important. The selection and release of parent crayfish is usually from the end of August to the middle of October and can be caught from culture ponds or natural waters. Male and female parent shrimps are required to come from different waters to reduce inbreeding. The parent shrimp should be out of water for no more than 2 hours, and the time can be longer in indoor or humid environment.

Parent shrimp stocking: parent shrimp should have a strong physique, complete appendages and uniform specifications, and release their feet at one time to avoid batch stocking and reduce the killing of each other. When stocking parent shrimps, they should be evenly stocked and evenly distributed around the pond. For long-distance transportation, soak the parent shrimp in water for 5 minutes, then put the parent shrimp in the pond for 3 minutes, repeated 3 times, let the parent shrimp absorb enough water, and then slowly put the parent shrimp into the pond, the survival rate can be improved, and the female-to-male ratio of parent shrimp is 2: 3 ∶ 1. Crayfish can mate and lay eggs in autumn and winter, and the mating season is from September to December. In early March of the following year, when the temperature rises to 12 ℃ and the water temperature rises to more than 10 ℃, shrimp will leave the cave to feed and move. At this time, management should be strengthened and artificial feed should be given. Strengthen feeding when the water temperature is above 18 ℃. When a large number of young shrimps hatch, cages can be used to catch parent shrimps that have been bred.

Stocking density: mainly raising crayfish pond, planting shrimp 30kg / mu, 30g / mu, and feeding artificial feed in time after parent shrimp is released. In April of the following year, he began fishing in cages and shrimp cages, with an annual yield of 200 Mu and 300 kg per mu. From now on, we will only harvest every year, and there is no need to plant seeds. It should be noted that fishing should not be overdone, such as overfishing, the yield will inevitably decrease in the coming year, and it is necessary to replenish the planting at this time. In the mixed culture pond, the prawns were planted in 20kg per mu, with a specification of about 25g. Instead of feeding, they were mainly fed with natural bait in the pond and residual bait in the fishing pond. The cage fishing began in April of the following year, and the catch was large and small, with a yield of 50Mu and 100kg per mu.