First, into the box time. In the late autumn and early winter when the water temperature is around 10°C, choose the weather with clear weather and warm days.
Second, place selection. Overwintering areas require shelter from the sun, rich in dissolved oxygen, and clean, unpolluted waters of Lake Bay, with a water depth of more than 3 meters. The water level is stable, and micro-flowing water is preferable.
Third, the use of cages. The use of closed sink cages, specifications for 4 meters 7 meters 2 meters. The size of the mesh is compatible with the size of the stocked fingerlings. For example, fingerlings with a size of 10 to 14 cm have a mesh size of 2.5 cm to 3 cm.
Fourth, the winter density. In general, every cubic metre of cage water can contain between 3 and 5 kg of small-scale species from 10 to 14 cm, or 5 to 6 kg from 15 to 20 cm.
Fifth, and box operation. Fish should be stopped feeding 2 to 3 days before the box is placed. The fish species cultivated in the pond should be selected before the box and divided into groups. After the thin and sickly fish species are picked out, they are bathed in 4% saline for 3 to 4 minutes and then placed in boxes. Wintering. It is best to place only the same species of fish of the same species in each wintering cage.
Six, cage settings. 7 days to 10 days before entering the box, the two-layer net cages are placed in the water, so that the cage can attach some algae or sediments, and then put the fish species to reduce the abrasion of fish in the new cage. . From 10 days to 20 days before the ice seal, the temperature of the water is about 4°C. The net cages of the fish species will be put into the water, and the bottom of the tank will not reach the bottom. The top of the tank is about 40 cm away from the water surface.
Seven, winter management. During the winter, the cages should be inspected regularly to observe the water conditions and fish movements. When the water surface is frozen, it is necessary to beat the ice eyes to change the air and oxygen. In the days when the weather continues to be clear and the temperature is high, it is advisable to feed some concentrates and keep them in good health. The dirt residue attached to the cage should be regularly removed to keep the flow of water inside and outside the cage open. Pay attention to the repair of damaged cages to prevent escape and prevent disease.
Eight, promptly from the box. When the water temperature rises above 10°C in the spring of the following year, the wintering fish species in the cage can be transferred to ponds, reservoirs or adult fish net cages for rearing.
Second, place selection. Overwintering areas require shelter from the sun, rich in dissolved oxygen, and clean, unpolluted waters of Lake Bay, with a water depth of more than 3 meters. The water level is stable, and micro-flowing water is preferable.
Third, the use of cages. The use of closed sink cages, specifications for 4 meters 7 meters 2 meters. The size of the mesh is compatible with the size of the stocked fingerlings. For example, fingerlings with a size of 10 to 14 cm have a mesh size of 2.5 cm to 3 cm.
Fourth, the winter density. In general, every cubic metre of cage water can contain between 3 and 5 kg of small-scale species from 10 to 14 cm, or 5 to 6 kg from 15 to 20 cm.
Fifth, and box operation. Fish should be stopped feeding 2 to 3 days before the box is placed. The fish species cultivated in the pond should be selected before the box and divided into groups. After the thin and sickly fish species are picked out, they are bathed in 4% saline for 3 to 4 minutes and then placed in boxes. Wintering. It is best to place only the same species of fish of the same species in each wintering cage.
Six, cage settings. 7 days to 10 days before entering the box, the two-layer net cages are placed in the water, so that the cage can attach some algae or sediments, and then put the fish species to reduce the abrasion of fish in the new cage. . From 10 days to 20 days before the ice seal, the temperature of the water is about 4°C. The net cages of the fish species will be put into the water, and the bottom of the tank will not reach the bottom. The top of the tank is about 40 cm away from the water surface.
Seven, winter management. During the winter, the cages should be inspected regularly to observe the water conditions and fish movements. When the water surface is frozen, it is necessary to beat the ice eyes to change the air and oxygen. In the days when the weather continues to be clear and the temperature is high, it is advisable to feed some concentrates and keep them in good health. The dirt residue attached to the cage should be regularly removed to keep the flow of water inside and outside the cage open. Pay attention to the repair of damaged cages to prevent escape and prevent disease.
Eight, promptly from the box. When the water temperature rises above 10°C in the spring of the following year, the wintering fish species in the cage can be transferred to ponds, reservoirs or adult fish net cages for rearing.