2. Seed quality The requirements for shrimp seedling quality are: (1) the specifications are neat. The size of young shrimp is more than 0.8 cm, and the size of shrimp species is about 3 cm. The specifications and varieties of shrimps stocked in the same pond should be consistent, and all of them should be stocked at one time. (2) strong physique, complete appendages, no disease or injury, and strong vitality. (3) artificially cultivating shrimp seedlings and shrimp species. If it is a wild shrimp species, it should be domesticated for a period of time before stocking, so as to avoid fighting and killing each other. ?
3. Precautions: (1) Stocking should be carried out in sunny mornings in winter, and in sunny mornings or rainy days in summer and autumn to avoid sun exposure. (2) Wash shrimp 10 minute with 3% ~ 5% saline water before stocking to kill parasites and pathogenic bacteria. (3) Shrimp species purchased from other places should be treated slightly before stocking because they have not been watered for a long time. Soak shrimp seeds in the pool water for 1 min, lift them for 2-3 minutes, then soak them for 1 min, and repeat this for 2-3 times, so that the surface and gill cavity of shrimp seeds can absorb enough water before stocking, and the survival rate can be improved. (4) In the pond where crayfish are cultured, some silver carp and bighead carp are mixed appropriately to improve the water quality and make full use of the bait resources.