Fresh water culture of red-eyed trout

Red-eyed trout belongs to Cyprinidae, Yaroideae, Red-eyed trout, commonly known as red-eyed fish, red-eyed dace, ginseng fish, is one of the main high-quality economic fish in rivers. Its meat is tender, delicious and nutritious, so it is favored by consumers. The fish has the advantages of fast growth, strong adaptability, miscellaneous eating habits, low culture cost, high price of commercial fish, body shape similar to one-year-old grass carp and so on. 1. Pond conditions: the aquaculture pond requires adequate water source, good water quality, no pollution source nearby, good water retention, convenient entry and drainage, flat bottom, less silt, suitable area of 1000 ┫ 3000 min, water depth of 1.2-2.0 m. The pool water is required to be "fat, live, tender and cool", and the transparency of the pool water should be kept around 25-40cm. Second, pond disinfection into water: the pond should remove too much silt, dry pond exposure in winter, each ┫ with raw lime slurry 100ml 150kg disinfection, disinfection 10Mu after 15 days can be put after fermentation mature manure 200-300kg base fertilizer, and then with 60 mesh sieve silk filter water 3, fish stocking: select healthy and lively high-quality seedlings. The fish can be soaked in 5% salt water for 10 minutes before putting in. In the ponds where the main adult fish are raised, there are generally 800 per mu of winter fillet fish and 100 per mu of mixed ponds. Fourth, feeding management: 1, feed feeding. Red-eyed trout is an omnivorous fish, algae, organic detritus, water grass can eat, like to eat artificial formula feed. In the main pond, it is better to use full-price mixed feed, the content of crude protein in the feed of red-eyed trout is about 30%, and fine green algae and tender, fresh and palatable aquatic plants, ryegrass and vegetable leaves can be used as auxiliary feed. The daily feed intake is 38% of the fish's body weight. Usually cast once in the morning and once in the afternoon. Feed should adhere to the "four fixed" feeding principle, but also according to the weather, water temperature, water quality and the eating situation of fish, determine a reasonable amount of feed. Food intake is more exuberant from June to July and from September to October, and slows down slightly in midsummer. 2. Water quality control. In the process of aquaculture and production, the aerator is opened at noon every day for 2 hours, and in the evening according to the weather conditions, the aerator is opened at the right time to prevent fish from floating. The PH value is kept between 7Mel 8.5, dissolved oxygen 5mg/L is above, ammonia nitrogen is in 1mg/L, nitrite is in 0.06mg/L. In the middle and later stages of culture (especially in the high temperature season), fresh water should be replaced in time to keep the water quality of the pond fresh and the transparency controlled at 25-40cm. 10Mel 15 days, sprinkle the whole pond with 10-15kg of quicklime per mu to make the pond water slightly alkaline, which is beneficial to the growth of fish and the prevention and control of fish disease. According to the pond water quality and water temperature, qualified farmers can apply EM solution, photosynthetic bacteria and other microbial preparations every 12 minutes or so, which can effectively improve the water quality. 3. Daily management. In the process of breeding, we must observe and patrol the pond frequently, observe the changes of water quality, the activity of fish, food intake, diseases and so on, and deal with the problems in time. Often remove the rubbish around the fish pond, the residual bait on the food table (farm), floating objects on the surface of the water, etc., and make good work records. 5. prevention and control of fish disease: red-eyed trout has strong adaptability to life, and the infection rate and mortality rate of various diseases are relatively low, but the prevention and treatment of fish disease should adhere to the principle of "prevention without disease, early treatment of disease, comprehensive prevention and active treatment". In addition to disinfecting the fish body when the fish species go into the pond, fresh grass (bait), food grounds and tools should also be disinfected with drugs. Fish medicine is used to prevent fish disease regularly in the epidemic season of fish disease in summer and autumn. Sixth, the harvest of adult fish: when most individuals meet the listing specifications, they should catch the big and stay small and go on the market in time.