Pond preparation Choose a pond with a suitable area, good water retention, and convenient drainage and drainage. Put the pool water before putting the fish, level the bottom of the pool, excavate excess silt, remove weeds from the pool, clear the pond with 150kg to 200kg of lime per acre, and use 200kg of decomposed manure as base fertilizer after 5 days to 7 days. , add water 1.5 meters or so, 7 days to 10 days when there are more zooplankton can be placed when the seedlings. Seed stocking Stocking specifications are 3 cm to 3.5 cm. The stocking density should be appropriate. When the density is too large, it will affect the appearance of adult fish. It is prone to inconsistent specifications, and it is easy to cause disease. The output is also difficult to increase and the cost is increased. The density is too small, although the discharge specification can be significantly improved, but the pond size If it is not fully utilized, it is difficult to increase the output and it will also affect the benefits. According to experiments, 4000 to 6000 tails per acre are more suitable. Seedlings were disinfected with 15 to 15 grams of potassium permanganate or 2.5% saline solution per cubic meter for about 15 minutes. Feeding Stingrays have a habit of cluster feeding when they are small in size. When the fry is first introduced into the pool, it can be used for tame food and develop a habit of eating at a fixed point. This can increase the utilization of artificial feed and increase the feeding intensity of stingrays. The diet of the sturgeon is omnivorous and partial meat-feeding. Feeding artificially-formulated feeds is the main method of feeding (full-price artificial bait with appropriate protein content is a measure to ensure rapid growth of stingrays) every 3 days to 5 days Feed some of the fish, snail meat, animal waste, etc., and supplement the stingray to animal protein. According to the water temperature and weather conditions and timely adjustment of the amount of fish feed, generally 3% to 7% of the fish's body weight. Strictly follow the feeding principle of "Four Ding" when feeding. Water quality management During the aquaculture process, new water should be added frequently, and when the conditions are met, the pond is equipped with an impeller aerator, and when the dissolved oxygen is low, the aerator is turned on for oxygen. Adjust water quality to achieve "fat, live, tender and cool". The transparency is maintained at about 30 cm. Regular water quality analysis and analysis. Fish Disease Prevention Stingrays are fed with baits and sprinkling of topical drugs to prevent disease during regular development. Do a good job of day-to-day management, frequent patrols, find problems in a timely manner, and make good records.
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Stingray farming tips
Stingray is a spawning type fish of 1 year. The age of sexual maturity is generally 3 years old (the female is earlier than the male) and it has the habit of colony reproduction under natural conditions. The absolute fecundity of stingrays is typically between 3,500 and 6,500 eggs per end. The resulting eggs are sticky eggs. The testis of the male fish is petaloid and it is difficult to extrude semen during artificial insemination. The suitable breeding water temperature of yellow catfish is between 20°C and 28°C. Fertilized eggs at 25°C～27°C require 2.5 days to 3 days to hatch larvae.