In winter, as the temperature gradually decreases, various aquaculture species gradually shift from eating to eating and stopping until they enter hibernation. When the water temperature drops to around 10°C, measures must be taken to ensure its safe wintering. The following is a summary of the overwintering management points of several common aquaculture species for reference. First, fingerling ponds are suitable for an area of ​​2 to 6 mu and a depth of 1.5 to 2 meters. The surface of the pool is leeward and there are 20,000 fish in the mu. The feeding was stopped within one week before the lagoon (water temperature was around 10°C), and the weather was pulled twice in the clear weather and then screened, counted and pooled. Requires single breeding of the species, that is, the same species of fish in the same pool. The pool water maintains a certain degree of fatness. When it is sunny (at a temperature of 6°C or higher), a small amount of refined feed is required. Second, broodstock should try to pool water before winter, with a depth of 1 to 1.5 meters is appropriate, and appropriate amount of inorganic fertilizer, so that the pool of water after freezing can maintain a certain amount of phytoplankton, not only can maintain the necessary dissolved oxygen in the pool water , but also to meet the needs of fish and other small fish. In the event of ice formation, ice should be taken every day. Where the water temperature is high, feeding, fertilizing and infusing fresh water can still be properly performed. Third, squid species choose leeward sunny, an area of ​​1 to 3 acres, more than 2 meters deep fish ponds for the winter pool. When the water temperature drops to about 10°C, clear weather is selected and the pond is overwintering. There are 3,000 to 5,000 squid species with specifications of 10 to 15 cm per mu. The amount of fish in the pond should be gradually controlled in the first half of the month. The operation of pulling nets, fishing, selecting fish, transportation, etc. should be careful to avoid injury to fish. To maintain a certain degree of water quality, a certain amount of bait can be put in the pond for feeding. Fourth, the green shrimp is mainly larvae, broodstock winter. Use ponds that are more regular, sheltered from the sun, and have a water depth of more than 1.5 meters and more aquatic grasses as wintering ponds. In wintering ponds, generally 150 to 200 kg of water plants or 25 to 35 kg of willow roots can be planted per acre. Choose prawn for wintering broodstock with robust physique, complete appendages, and standard body size, among which the female broodstock size is 200 to 500/kg, the male broodstock size is 140 to 240/kg, and the male to female ratio is 2:1, mu. Put 15 to 25 kilograms of broodstock. If the larvae are overwintering, they should start from late December. When the larvae are overwinter, they will stocked with 200 to 300 juveniles of 20 to 40 kg per acre on the water surface. In the sunny and warm weather, each mus of the water surface needs to feed 1 to 2 kg of food bait every 1 to 2 kilograms of food bait every 7 to 10 days. The bait is required to be small and refined. It is managed by special personnel to inspect regularly and be well protected. Pollution, work against enemy and harm. Suture Needle,Chromic Catgut Suture,Chromic Suture,Medical Disposable Suture Surgimed Medical Supplies Co.,Ltd , https://www.surgimedcn.com