American bigmouth fish breeding method

The American bigmouth bass, also known as the giant skimmer, is a oystercatcher, and is a large freshwater fish species native to North America imported from the United States. This fish has the characteristics of large individuals, fast growth, easy breeding, and strong fertility. It is a famous and excellent variety worthy of promotion and breeding. The breeding techniques are summarized as follows: 1. Pond conditions 1. Choose a pond with an area of ​​2 to 5 acres, with a water depth of 1.5 to 2 meters. The pond will not leak, the water and fertilizer will be good, drainage and irrigation are convenient, and the water supply is sufficient and the water quality is good. 2. Before the fish are stocked, kill the pathogens in the fish pond. It is generally 7 days to 8 days before the fish species are stocked, and the quicklime is 75 kg/mu ~ 100 kg/mu. 2 days to 3 days after the injection of new water, and manure 300 kg / acre ~ 400 kg / acre as a base fertilizer to cultivate natural food. Second, fish stocking fish stocking optional in April to May, try to achieve early stocking, early eating, early growth. The stocking species requires a strong physique, no disease, no injury, and neat specifications. It is best to be sterilized before stocking, soak with 3% to 5% of normal saline for 5 minutes to 10 minutes or dip with 20 mg/up of potassium manganate for 30 minutes. The amount of stocking depends on the specific circumstances, generally 800 to 1000 mu / mu is appropriate, can be appropriate with some squid, squid, squid and so on. Third, feeding and management 1. Bait fish species can be started feeding 1 day to 2 days, bait protein requirements controlled at about 32%, carp material, tilapia materials, etc. can be used as a substitute for feed. Feeding should follow the principle of “Four Sets”, and the amount of daily feeding should be 1% to 5% of the total weight of the fish. The specific quantity should also be determined according to the season, weather, size of the fish, eating conditions, and water quality, generally 1% in spring. ~ 3%, 3% ~ 5% in summer and autumn, generally two times a day to three times feeding. 2. Fertilization The main trophozoites are mainly fertilized, supplemented by feeding. Largemouth bass is a staple food plankton in natural waters, and proper fertilization can save bait costs. Green manure is applied once every 10 days, with a dosage of 100 kg/mu ~ 150 kg/mu; a fertilizer is applied every 3 days to 4 days, and 1 kg urea and 2 kg of phosphate fertilizer are applied per acre. The fertilization time should be selected for sunny days. It should also be increased or decreased according to the water quality and the degree of water thinning. The transparency should be controlled at 20 cm to 25 cm. 3. Water quality management should adhere to the daily tour ponds and pay attention to changes in water quality. Good water quality can both promote growth and prevent disease. Sprinkle lime once every 15 days. The dosage is 15kg/mu~25kg/mu. Each time lime is splashed with lime for 1 to 2 days, 20 cm to 30 cm deep water is refreshed, which is conducive to the growth and reproduction of natural food. During the summer hot season, it is necessary to constantly update the water to prevent the water temperature from being too high and affect the growth of the fish. When the water quality is too fat, we must pay attention to changing the water and always maintain the water quality “fat, live, tender and cool” to facilitate the growth of the fish. Fourth, fish disease prevention and control as long as the feeding and management in place, very rare fish rouge. The main measures for preventing disease are: 1. Before the fish species is under the pond, the disinfection of the pond should be thorough, the fish species should be disinfected and the pond should be disinfected; 2. The lime water should be splashed once every 10 days to 15 days, and the dosage should be 15 kg/mu to 25 kg. / Mu; 3. Polyculture of 20 to 50 fish per acre of stingray can prevent head rot disease; 4. Fish disease in the regular season for every 50 kg of fish with 5 grams to 10 grams of furazolidone bait, continuous feeding 3 days.

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