After entering the winter, the temperature gradually decreased, and various aquaculture species changed from Wangshi food to Shaoshi, stopping until they entered hibernation. At this time, on the one hand, it is necessary to do a good job in catching up and listing aquatic aquaculture products that have reached the product specifications in a timely manner. On the other hand, we must do a good job in the safe wintering management of unlisted aquaculture objects. 1. The area of ​​fingerling ponds is 2-6 mu and the water depth is about 2 meters. The surface of the pond is sunny and the feeding is stopped before the pond (water temperature is about 10 DEG C) for one week. Choose the fine weather to pull the net 2 times, then proceed to screen, count, and pond. Requires single breeding of species, ie, the same species of fish in the same pool. Maintain a certain degree of fatness in pool water, and fine weather (at temperatures above 6°C) requires a small amount of concentrate feed. In case of fish pond freezing, it is necessary to break ice to prevent dead fish. 2. Before the broodstock is overwinter, it should try to fill the pool of water that is 1-1.5 meters deep, and apply appropriate amount of inorganic fertilizer and try to maintain a certain amount of plankton in the water to maintain the necessary dissolved oxygen in the pool water and meet the fishes such as chain and bream. The kind of weak foraging. 3. Green shrimp chose to shelter from the sun, ponds with water depths of more than 1.5 meters and more aquatic grass as wintering ponds. In the wintering pond, 150.200 kg of water is planted per acre. Choose prawn with robust physique, complete glue, and standard size for wintering, including 200-500/kg for females, 140-240/kg for males, 2:1 ratio for males and females, and 15-15 for mu. 25 kg. Juveniles should start winter in late December and they should be stocked on sunny days. The specifications should be 2000-3000/kg, and stocking should be 20-40 kg per mu. In sunny and warm weather, feed each 1-2 kg of food bait every mu, feeding once every 7.10 days, the requirements of the bait are small and refined. 4. Before Huang Dong enters the winter, it needs a lot of food to store nutrients. When the temperature drops to 15°C, high-quality bait should be fed to make it rich. When the temperature drops to 10°C, it enters a state of body sleep and drains the pool water, covering a small amount of straw, keeping his mud moist and warm. Prevent frostbite and jaundice. 5. For squid species, choose the leeward sunny, fish pond with an area of ​​1-3 mu and water depth of 2 meters or more as the wintering pond. When the water temperature drops to 10°C, choose sunny ponds and ponds, and reserve 5000-5000 tails of Tibetan fishes with specifications of 10-15 cm per acre. The water quality must maintain a certain degree of fat, and oxygen-raising measures should also be taken in areas with long ice-sealing periods. 6. Crabs If crabs do not meet the specifications for the year, they must consider wintering. Generally, before and after the winter season, the overwintering pond is selected. The pond must have a mound higher than the surface of the water. There must be aquatic plants with a water depth of 1.5 meters. The appropriate amount of salt is added to the pool so as to increase the osmotic pressure of the pool water, reduce the freezing point, and meet the crab physiology. The required salinity. 7. The weight of juveniles before winter is usually only 5-15 grams. therefore. Before eating, increase the fat-rich bait. The hibernating pool can use the original indoor cultivation pool, first drain the pool water, add 30-40 cm thick sediment, and then irrigate 5-10 cm. Stocking density is 150-200 per square meter. When the temperature dropped to 10°C, the youngsters hiked into the sand and hibernated. At this time, they should be filled with pool water and the bamboo surface should be placed on the surface of the pool. The bamboo curtain is then covered with a layer of straw 20-30 cm thick so that the temperature in the pool is maintained at o-8°C. The pups can move into the indoor pool for winter, and they can also naturally winter in the sand on the outdoor pool floor. 8. Turtle hatchlings have weak physique and poor adaptability to the external environment, such as poor management and high winter mortality. After hatching, hatchlings should be transferred from the outdoors into the room. The interior should be filled with sediment, and the hatchlings should infiltrate into the sand. Sediment should be kept at a certain humidity. Keep the temperature above 0°C at room temperature and the temperature is too low to cover the pool with straw curtains. The hatchlings do not feed during the winter and have a density of 100-150 animals per square meter. The hatchlings are wintered in outdoor natural pools, with a density of 20-30/m2. Water depth of 1 meter or more, put 10-20 centimeters thick silt at the bottom of the pool, take a cold frame on the pool, place a plastic film on the rack, leave 1-2 vents, cover the straw on the film. 9. The eggs produced by the bullfrogs in mid-July can be used to control growth by reducing feeding and deepening the water level, so that the fuel enters the midwinter before it metamorphoses. The young frog that entered metamorphosis in May of the following year can weigh up to 15 grams. The fuel overwintered in a 60. 100-cm pool. Young frogs put plenty of food before wintering. When the water temperature drops below 10°C, the young frog begins to hibernate and appropriate wintering sites should be set up. Adult frogs can burrow or dive underwater for outdoor wintering. 10. In order to prevent freezing damage to the carcass, Hexi can deepen the water level of the pool or sink the perch to the deepwater layer, but it cannot touch the bottom of the pool, and it is necessary to maintain the appropriate body fat. In winter, it is necessary to break the ice on the surface to prevent oxygen deficiency in the water body.
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