After the winter had passed, the food intake of the shrimp decreased gradually as the temperature decreased, and it began to enter the wintering period in December. At the same time, on the one hand, it is necessary to promptly do a good job of catching and listing shrimps in storage ponds. On the other hand, we must pay close attention to the management of broodstock and prawns in Tongtang to ensure safe wintering. For stocking preparation, ponds with more shapes and rules, sheltering from the sun, and water depths of more than 1.5 meters, and having more aquatic plants are ponds for overwintering. The overwintering period of the shrimp in the Yangtze River basin starts from December and ends in April. During this period, the shrimps are lurking in the bottom grass and rarely move. Therefore, 200 kg of aquatic plants or 30 kg of poplar and willow will be placed in the overwintering pond to provide a good warm wintering environment for the shrimp. Strictly clear ponds before stocking, clear ponds have screens, dense nets, and filtration at the inlet to prevent entry of harmful organisms. Then put the disinfected plants and finally add the overwintering shrimp. In order to raise penaeid shrimp, individuals who are large in size, robust in physique, and disease-free without injury should be selected as winter broodstock. The female and male shrimps have specifications of 200-500 tails/kg and 140-240 tails/kg respectively, and the male-female ratio is 2:1 or 3:1, and 15-25 kg per mu. Juvenile shrimp 2000 ~ 3000 tails / kg per acre put 20 ~ 40 kg. The stocking specifications of the same pond should be the same size, one foot at a time. When going down the pond, you need to weigh, count, and take water. During the operation, the stacking pressure should not be exceeded. The time of leaving the water should not exceed 5 minutes. It must not be subjected to wind blowing or exposure. In order to maintain life and activities during the overwintering period, young shrimp still need to eat a small amount of food. Therefore, during the entire wintering period of the shrimp, as long as the weather is warm and the water temperature is above 8°C, it is still necessary to insist on feeding in order to maintain its life activities. During the winter, they insisted on regular inspections of the ponds to check the winter conditions and water quality changes of the shrimps, and do a good job of preventing pollution and preventing predators. During the severe winter season, it is necessary to prevent the pool water from freezing. Once it is frozen, it should be broken or drilled in time to prevent the shrimp from suffocating and dying. Animal Collagen,Marine Collagen Powder,Pure Type Ii Collagen,Non Denatured Collagen Type Ii Ningbo Nutrition Food Technology Co.,ltd. , https://www.collagenworkshop.com