When choosing a pond for breeding snakehead, the area should not be too small, and good lighting is needed. Black snakehead is a carnivorous fish, and its feces are very easy to pollute the water source, so it is required to drain water and inject water into the pond conveniently. The optimum water depth is 1.5-2m, and the thickness of mud at the bottom of the pond is 15-20cm (too thick mud in the pond will affect fishing in the later stage). The entrances and exits must be reinforced with escape nets, and some aquatic plants can be planted around the pond.

Second, the fry are released.

The feeding specifications of snakehead are generally determined according to the specifications of commercial fish in the market. At present, the individual weight of snakehead is 0.7 kg-2.0 kg, so the feeding specification of snakehead fry is 50 g- 100 g per tail, and the stocking density needs to be determined according to feed source, feeding technology and other factors. Generally speaking, 2000-2500 tails are fed per mu. At the same time, 400-500 silver carp fry can be interplanted (the size of silver carp must be more than twice that of snakehead, so as not to be swallowed by snakehead).

Third, feeding technology.

1. Fresh bait: snakehead is a carnivorous fish, mainly small miscellaneous fish such as crucian carp. In the early stage of breeding, the wild miscellaneous fish with large specifications are chopped and fed, and the daily feeding amount is generally about 5% of the total weight of the fish. The second fish pond is also a good choice for farmers to raise grass carp and silver carp, and to raise snakehead with silver carp with lower price.

2. Artificial compound feed: snakehead can also be fed with artificial compound bait, and its formula is: 70% of minced shrimp paste, 20% of bean powder, 5% of yeast powder, and the rest are multi-dimensional mineral salts, growth promoters and antibiotics. Feeding should be timed, located, qualitative and quantitative. Feed it twice a day, once in the morning and once in the afternoon. When the appetite is strong, feed it at night.

Generally, snakehead can float to the surface for food after 5-7 days of stocking. When feeding, carefully observe the feeding situation of snakehead near the table. If there are few snakeheads near the food table, and the looting of food is not intense, it means that the fish are full and can stop feeding.

Fourth, daily management.

1. patrolling the pond: snakehead has a big appetite and a lot of excrement, which will soon make the pond water fat. Fat water can make plankton multiply in large quantities, which is easy to cause hypoxia in the pool water. So patrol the pond every morning and evening, carefully observe the feeding and activities of snakehead, and pay attention to the changes of water quality. According to the water quality, the amount of quicklime water is 667m2 (65438+) from time to time.

2. Change water: Once it is found that the bait remains too much or the water quality is aging, new water can be injected and old water discharged to keep the pool water fresh. In the hot season from July to September, at least one third of the water should be changed every week to promote the normal growth of snakehead.

Five, do a good job of disinfection and fish disease prevention and control.

1. The snakehead entered Tang Qian 10 ~ 15 days, and the pond was cleaned and disinfected. When cleaning the disinfection pond by dry method, generally 60 ~ 75 kilograms of quicklime is used per mu; When cleaning the pond with water for disinfection, the general water depth is 1m, and the quicklime is 120- 150kg per mu.

2. Keep the water fresh, choose fresh and disease-free bait fish to feed, and soak in 3% ~ 5% salt solution for 30 ~ 60 minutes before feeding. Every 15 ~ 20 days, each acre is disinfected with 25 ~ 30 kilograms of quicklime or with chlorine-containing disinfectant. Disinfect water bodies, dining tables, fishing gear, etc. Take medicine regularly and bury dead fish in time.

3. Clear the pond: After the winter fishing, dredge and drain the adult fish pond, and thoroughly clean and disinfect the pond.

4. Although snakehead has strong disease resistance, it is also prone to diseases after high-density culture, mainly hemorrhagic diseases, skin rot, scabies, gill rot and so on. The method of combining internal and external treatment is adopted. Chlorine dioxide100g per mu can be sprayed with water in the whole pond, and enrofloxacin can be used as medicine. We should nip in the bud and treat diseases as soon as possible.