The pond lice fish are gluttonous and often lurk in the dark at the bottom of the pool after being full. Therefore, it has fast growth, high yield and short production cycle. In the south of China, it can be raised for 2 ~ 3 seasons every year, and it can be raised in ponds. After 4 ~ 5 months, the fry can generally grow to 0.5 kg, the largest individual can reach more than 2 kg, and the yield per mu can reach 5,000 kg.
For the overwintering fish species last year, it can generally grow to 1 kg, and the largest individual can reach more than 4 kg. Silurus meridionalis is a kind of omnivorous fish, which mainly feeds on animals. Its daily food intake is 5-8% of its own weight, and the maximum food intake is more than 15%. If it is fed too much, it will cause the phenomenon of overeating and dying.
Silurus meridionalis has strong hunger tolerance. During artificial overwintering, fingerlings or parent fish will not die if they are not fed for 4-5 months. When the water temperature rises above 15℃, they begin to feed normally, and the temperature is 20-35℃.
Extended data:
Daily management of cultured pond fish;
1, lotus root and fish should be taken into account, and the water level should be adjusted reasonably. At ordinary times, the water level in the big pond should be kept at 30 ~ 50 cm, and the water level beyond the deep water level is not conducive to the photosynthesis and growth of lotus root.
2. Use high-efficiency and low-toxicity pesticides to control lotus root diseases and insect pests. The powder should be applied in the morning with dew, and the spunlace should be sprinkled on the stems and leaves of lotus root as far as possible to avoid falling directly into the water. When applying the pesticide, it is best to drive the fish into the fish ditch and fish pit.
3. Fertilization should be based on base fertilizer, supplemented by topdressing; Give priority to with organic fertilizer, supplemented by chemical fertilizer.
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