Fish sinking winter
When the fish species are strong, they are easy to adapt to the environment of the cage. At the same time, when the cascading caisson is overwintering, not only the weight of the fish is less than that of the pond, but after the spring comes out, the fish begin to eat at about 5 degrees Celsius, and the growth period is longer than that of the spring. The fish is prolonged for one month. The fish grows fast and the yield increases significantly. The main points of wintering operation of fish species into the box in the fall are as follows: The general water temperature is suitable for 15-18 degrees Celsius and not lower than 10 degrees Celsius. Disinfection before entering the box can be combined with the transport of fingerlings. 7-10 days before the fish enters the box, put the complete undamaged double-layer net cage into the water, so that the cage can be attached with a layer of algae or sediment material, and then put the fish species to reduce the new cage rubbing the fish body Opportunity. The fish species are fed into the tank for a period of time so that the injured parts of the fish species can be recovered in a timely manner during catching and transportation, and the occurrence of fish diseases due to infection can be reduced. The caisson must be fed before winter, until the fish do not eat (water temperature 5-6 degrees Celsius), to ensure that the species is robust before winter, do not cause premature fish to weaken due to premature feeding. The sinking time of the cage is controlled at about 4 degrees Celsius. At this time, the temperature above and below the water body is basically the same, and the convection of the upper and lower layers is over. When the fish sinks, it will not cause unrest due to changes in the water layer.
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