It is one of the main high-quality economic fishes in the river. It is one of the main high-quality economic fishes in rivers. The meat is delicate, delicious, nutritious, and highly favored by consumers. The fish has the advantages of rapid growth, strong adaptability, miscellaneous feeding habits, low breeding cost, high selling price of the commercial fish, and body shape resembling those of the first-year grass carp, and is a popular variety for the current freshwater aquaculture.
I. Pond conditions Aquaculture ponds require adequate water sources, good water quality, no pollution sources nearby, good water retention performance, convenient drainage and drainage, flat bottom, and less silt, with an area of ​​about 2 mu to 5 mu, and water depth of 1.2m~2.0m. The pool water requires “fat, live, tender and coolâ€, and the transparency of the pool water is maintained at about 25cm to 40cm.
Second, the pond disinfection Influent ponds should remove too much silt, winter dry pool exposure, per acre with calcined pulp 100kg ~ 150kg disinfection, disinfection 10 days to 15 days after each mu can be released by fermented decomposed manure 200kg ~ 300kg hit The basal fertilizer was then filtered through 60 mesh sieves.
Third, the fish stocking selection of healthy and lively quality seed. Fish species can be soaked with 3%~5% saline for 5 minutes to 10 minutes. The main pond for raising fish is generally 800 to 1,200 tails per acre, and 100 to 200 tails per acre.
Fourth, feeding and management
1. Feed feeding.
Red-eyed oysters are omnivorous fish, algae, organic debris, and dry grass can feed, eat artificial compound feed. In the main ponds, full-price pelleted feeds are used. The content of crude protein in feeds is approximately 30%, and fine green algae and soft, fresh, palatable waterweeds, ryegrass, vegetable leaves, etc. can also be used as auxiliary feed. .
Daily feeding is 3% to 8% of the fish's body weight. In general, every afternoon. Feeding feeds should adhere to the principle of "Four Ding" feeding, but also determine the reasonable amount of feeding according to the weather, water temperature, water quality, and the fish's eating and feeding conditions. From June to July and from September to October, the food intake was more vigorous and the summer was slightly slower.
2. Water quality regulation.
In the aquaculture production process, the aerator is to be opened every noon for 1 hour to 2 hours. At night, the aerator is opened as the weather conditions so as to prevent fish floating heads. The pH was maintained between 7 and 8.5, dissolved oxygen above 5 mg/L, ammonia within 1 mg/L, and nitrite within 0.06 mg/L. In the middle and later stages of breeding (especially in the hot season), new water should be replaced in time to keep the water quality of the pond fresh, and the transparency should be controlled within 25cm~40cm. 10 days to 15 days, lime per acre 10kg ~ 15kg Quanchiposa once, so that the pool was slightly alkaline, in order to facilitate the growth of fish and the prevention of fish diseases. Conditional households can use EM fluids, photosynthetic bacteria and other microbial preparations every 12 days to 15 days according to pond water quality, water temperature, etc., which can effectively improve water quality.
3. Daily management.
During the aquaculture process, daily observations must be kept, diligent ponds should be observed, changes in water quality should be observed, fish activities, feeding conditions, and whether or not there is any disease, etc., and problems should be dealt with promptly. Frequent removal of garbage around fishing ponds, residual baits on food stations (fields), floating objects on the water surface, etc.
Fifth, fish disease prevention and control of the eyelid life, strong adaptability, various diseases infection rate and mortality after infection is low, but prevention of fish disease should adhere to the principle of "disease-free prevention, early treatment of disease, comprehensive prevention, active treatment" principle, In addition to disinfecting the fish when the species is under the pond, it is also necessary to disinfect the fresh grass (food), food facilities, tools, etc., and to regularly use fishery medicine for the prevention of fish diseases in the summer and autumn fish disease epidemic season.
Sixth, the harvest of adult fish When the majority of individuals to reach the market specifications, should catch large stay small, timely listing.
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