How to raise crayfish? Five major questions answered at once
1. What conditions are needed?
Answer: Crayfish have strong adaptability to the environment and can grow in various water bodies such as lakes, ponds, ditches, and rice fields. The water source must be sufficient, with a water depth of about 1 m.
2. Can crayfish be raised in a goldfish tank?
Answer: Yes, but it cannot form large-scale farming, nor can it produce economic benefits.
3. What are the returns from raising crayfish?
Answer: Generally, stocking 30 jin of brood crayfish per mu can breed 200 to 300 jin of crayfish, and the net profit can reach around 1,000 yuan. After five or six years, even without stocking brood crayfish, the yield per mu can still reach 200 jin.
4. When should brood crayfish be stocked, and where can brood crayfish be purchased?
Answer: Brood crayfish are generally stocked in September each year, and harvested for market from May to June of the following year. It is best to buy brood crayfish nearby, choosing crayfish with a large size and hard shell. This year, crayfish sources are in short supply, so farmers intending to raise crayfish can buy brood crayfish in advance and keep them in captivity, then stock them in September.
5. Now that crayfish farming is being promoted on a large scale, will it harm the ecology and flood control?
Answer: The destructive power of crayfish is not strong. First, they need a specific environment to grow and reproduce. At present, our city has nearly 400,000 mu of low-lying land suitable for raising crayfish. In addition, among aquatic products, the reproductive capacity of crayfish is not the strongest; one female crayfish can reproduce two hundred young crayfish. At present, the export and domestic demand for crayfish still exceed supply. Even if no one ever eats them, crayfish are very easy to catch and will not pose too great a threat. In addition, although crayfish like to burrow, experiments have found that the burrows are only 20 to 30 cm deep, with the deepest only a little more than 1 m deep, and they run diagonally toward the groundwater direction, so they will not pose a threat to flood control.