Stingray hi habitat in calm water or slow flow of water, a wide range of survival temperatures, generally 0 °C ~ 39 °C, the most suitable water temperature for the growth of 22 °C ~ 28 °C, the most suitable pH range of water is 7.0 ~ 8.5, suitable for dissolved oxygen The amount is more than 3.0 mg/l. Under natural conditions, the fish that just hatched from the membrane for 3 days to 5 days absorbed its own yolk as a nutrient. At the seedling stage, rotifers, small horned horns, leeches, and other aquatic larvae are used as baits. Artificially cultivated small fish, shrimps and molluscs that can be fed and minced can also be fed.
Stingray is generally female 2nd instar, male 3rd instar mature, water temperature 23°C～26°C is the breeding season, and the fertility is 4000 to 6000 grains per tail. Like squid and squid, it is a sticky, heavy egg. Fertilized eggs hatch at larvae for 72 hours at a water temperature of 24°C to 26°C. Stingray artificial breeding methods are monoculture and polyculture two.
The main measures for monoculture are: selecting ponds with fresh water, rich dissolved oxygen, and convenient drainage and drainage, covering an area of ​​2 to 3 mu and a water depth of 1 to 2 meters, installing drainage sheds and nets, dredging ponds and using quicklime, After the bleaching powder is disinfected, 2,500 to 3000 tails of stingray winter fish, which is about 3 cm in length for each acre, can be placed, and 100 to 200 tails of a white sturgeon with a body length of 12 cm can also be placed. After stocking, they are fed with fresh animal feed such as quail, clam meat, small fish, and shrimp, and the daily feeding amount is 3% to 6% of the fish's body weight. In the summer and autumn high temperature season, change the water once every 7 to 10 days, each time 30 to 40 centimeters deep, and keep the water transparency 35 to 40 centimeters. In order to prevent the occurrence of fish diseases, the fish species must be immersed in drugs when stocking. Usually, 10 ppm potassium permanganate or 2% to 4% salt solution is used to dip fish species for 5 to 10 minutes. Every 15 to 20 days during the breeding period, bleaching and quicklime are sprayed once to make the pool water reach 1.2ppm and 10ppm respectively. Monthly use of rhubarb, Radix, and other traditional Chinese medicines were made from 0.1% to 0.4% of bait, and fed for 3 to 5 days. At the same time, it is necessary to avoid damaging the fish body during fishing, placing, and transportation in order to prevent infection of water mildew in the early spring and autumn and winter cold seasons. Monoculture can reach 200-300 kg per mu.
The polyculture method is to raise 100 to 200 tails of a sting in more than 3 cm per acre in the water surface of the special aquatic products such as nets, ponds, etc., which mainly raises four major fishes, or raises tilapia, river crabs, and turtles. Without affecting the yield of the main cultivar, 20 to 30 kg of stingrays weighing 150 to 200 grams per mu can be obtained. Mixed polytrichum can not only reduce the number of small miscellaneous fish and shrimp competing for food with the main fish, increase the yield of the main culture species, but also can effectively control the parasitic diseases such as anchorage and other diseases of the cultured species.
Stingray is generally female 2nd instar, male 3rd instar mature, water temperature 23°C～26°C is the breeding season, and the fertility is 4000 to 6000 grains per tail. Like squid and squid, it is a sticky, heavy egg. Fertilized eggs hatch at larvae for 72 hours at a water temperature of 24°C to 26°C. Stingray artificial breeding methods are monoculture and polyculture two.
The main measures for monoculture are: selecting ponds with fresh water, rich dissolved oxygen, and convenient drainage and drainage, covering an area of ​​2 to 3 mu and a water depth of 1 to 2 meters, installing drainage sheds and nets, dredging ponds and using quicklime, After the bleaching powder is disinfected, 2,500 to 3000 tails of stingray winter fish, which is about 3 cm in length for each acre, can be placed, and 100 to 200 tails of a white sturgeon with a body length of 12 cm can also be placed. After stocking, they are fed with fresh animal feed such as quail, clam meat, small fish, and shrimp, and the daily feeding amount is 3% to 6% of the fish's body weight. In the summer and autumn high temperature season, change the water once every 7 to 10 days, each time 30 to 40 centimeters deep, and keep the water transparency 35 to 40 centimeters. In order to prevent the occurrence of fish diseases, the fish species must be immersed in drugs when stocking. Usually, 10 ppm potassium permanganate or 2% to 4% salt solution is used to dip fish species for 5 to 10 minutes. Every 15 to 20 days during the breeding period, bleaching and quicklime are sprayed once to make the pool water reach 1.2ppm and 10ppm respectively. Monthly use of rhubarb, Radix, and other traditional Chinese medicines were made from 0.1% to 0.4% of bait, and fed for 3 to 5 days. At the same time, it is necessary to avoid damaging the fish body during fishing, placing, and transportation in order to prevent infection of water mildew in the early spring and autumn and winter cold seasons. Monoculture can reach 200-300 kg per mu.
The polyculture method is to raise 100 to 200 tails of a sting in more than 3 cm per acre in the water surface of the special aquatic products such as nets, ponds, etc., which mainly raises four major fishes, or raises tilapia, river crabs, and turtles. Without affecting the yield of the main cultivar, 20 to 30 kg of stingrays weighing 150 to 200 grams per mu can be obtained. Mixed polytrichum can not only reduce the number of small miscellaneous fish and shrimp competing for food with the main fish, increase the yield of the main culture species, but also can effectively control the parasitic diseases such as anchorage and other diseases of the cultured species.
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