Overwintering freshwater white bream species must be physically strong, regular in size, non-injury-free, and smooth in appearance. Where fish is thin, swimming is slow, and foraging is poor, they should be removed as much as possible.
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In the wintering season, large-scale fish species are cultivated for the following year. Therefore, the negative seed species entering the wintering pond must be based on the fish species specifications, market conditions, water temperature in the wintering pond, water exchange volume, and wintering season juice for the following year. The amount of fish species is determined by the amount of fish growth, etc.: The species size of the fish species entering the wintering pond should not be too large. If the specifications are large, the wintering quantity will decrease and the wintering cost will increase. The specifications should not be too small and the survival rate of the too small winter survival rate is not high. . It is generally better to have a total length of 4-5 cm or more, and the specifications should be as tidy as possible. If the fish species are cultivated in batches, or if the specifications of the fish species are too disparate due to feeding, management, etc., the fish should be sieved before entering the overwintering pool. Fish of different specifications and sizes must be pooled over the winter to ensure overwintering species. The survival rate.
In order to allow the fish species entering the overwintering pool to enter the wintering pond for transport and enhance the fish's low resistance to disease, the fish species should be placed in a special pool for intensive cultivation during the period before wintering. In particular, in autumn, fish have large food intake and must be fed with nutrient-rich feeds so that freshwater fishes can accumulate more nutrients in the body before they reach winter, reaching a healthy body and providing fertilizer for winter consumption.