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1, before winter, training fat fish constitution. Before entering the winter, feed more high-protein, high-fat diets. The fattening constitution enables the fish to resist and adapt to changes in the environment.
2, strengthen management. It is necessary to constantly observe the activities of fish and take timely measures to find that the bad situation is immediately dealt with to prevent the occurrence of fish disease.
3, improve lighting. It is necessary to use all possibilities to enhance and improve lighting conditions, increase the photosynthesis capacity of phytoplankton, and indirectly increase dissolved oxygen in water.
4, add new water. Adding fresh water to the pond can both improve pond water quality, increase dissolved oxygen, and allow the water to circulate and raise the water temperature.
Wintering Management Techniques of Southern Fish Species
The water temperature in the winter and spring of southern China is low, and fish diseases and dead fish often occur in the late winter. One of the main reasons is the lack of oxygen in the aquaculture waters, and the second is that winter fish have a large increase in the number of dead fish because of the low temperature, low intake of fish, and poor fish quality. According to the geographical and climatic characteristics of the city and fishermen's experience, it should be noted that the following points should be noted, which can effectively reduce the occurrence of fish diseases in winter.