1. The raising of fry and the breeding of fry are fostered by Wucai. The raising of the fry is to make the fry grow bigger and more robust. After waiting for body color to turn black and smooth, you can use the next place for further training. The newly hatched fry is very small, with a very round yolk. It quickly sinks to the bottom of the water. The tail quickly vibrates. The mouth has not yet opened. It is impossible to cultivate the pond immediately. It needs to be in the hatching tank (cylinder). Continue to raise 4~5d. It was observed that small rotifers can be ingested 2~3 days after the fishes are out of the membrane. In this case, the rotifers should be fed to the bait culture pond or other ponds in a timely manner with 180 to 200 mesh sieves to feed rotifers, and the bait density can reach 10 to 50. Ml rotifers, equivalent to one or two drops of water.
After cultivation, the young fish will be reared for about 20 days, and then it can be used as 2 to 2.5 nnn. The Wuzi Cultivating Pool is generally made of cement pools. Rectangular, net-shaped, and elliptical mesh shapes are all available. The bottom surface is required to be smooth, there are inlet and outlet, and the outlet is blocked with a 40-60 mesh screen. After the raised fish siphons are sucked into the dense-eye sieve cages, the seedlings are counted and counted. Drifting debris is removed, and 1 to 2 thousand larvae are released on 1 square meter. Each day, live bait was harvested from the bait culture ponds and fed one at a time in the morning and one in the early stage. The rotifers were fed in the early stage. In the middle and later stages, larvae and copepods were fed, and fish were weighed with 100 to 120 mesh sieves. The feeding density was appropriately reduced.
Management, shade shelters or concealed objects to avoid glare; to maintain micro-water flow or micro-inflating, to ensure that dissolved oxygen is not less than 4mg/l; non-flowing water pool should change water every day
1/4 to 1/3, stir up the bottom of the pool with a dense mesh cage siphoning or pumping; keep the water temperature does not exceed 30 °C, the water temperature is too high fry easily floating head, disease: the bait to fish after going through the water rinse Hey.
2. Fish species breeding ponds with an area of ​​2000-3000 m2, water depth of about 1.8m, less silt, convenient water and electricity, and quick-lime clear ponds, water injection, fertilization and culture of food organisms, and pools Surrounded by aquatic plants, old mesh, grass curtains and other hidden objects. After the pond food organisms reach the peak and the water quality is stable, they can be planted, and the fry can be placed on the hidden place. The main breeding place is about 20,000 m2 per 667 m2, and then the rearing stock is 2000 larvae. Left and right; polyculture of 0.8 to 10,000 per 667 square meters, only polyculture carp, head lice, oysters, etc., put summer fish fry 2000 ~ 3000, also with a small amount of stocking summer carp seedlings. Polyculture and collocation varieties should be released after the successful domestication of yellow snapper.
After domestication and feeding, 2 to 3 days later, the fry basically adapts to the pond environment, ie domestication and feeding, and feeding the feed in 5 to 6 meters on both sides of the feeding table, 2 to 3 times a day, giving a fixed sound and gradually reducing the investment. Feeding range, and finally fixed to the feeding table, 10d left can be domesticated successfully. There are two kinds of commonly used feeds, one is animal feed (frozen sea bream fish, poultry, internal organs, etc.)-based, with the appropriate mix of flour, bran, multi-dimensional additives hinged meat machine hinge into a soft pellet feed; It is finished pellet feed, which changes the particle size and protein content with the size of the fish. Generally, it is used in the early and middle stages with broken material, protein content is 40% to 45%, and later granular material with particle size of 1.5mm, protein content is 35%~40. %. The seedlings are fed 3 to 4 times a day. The stingrays like to feed in the evening and at night, and they must feed more properly, especially with a feeding machine. Regardless of manual feeding or machine feeding, each feeding time should be not less than 20min, adhere to a small amount of diligent vote, with 80% to 90% of the fish to eat well for the degree.
Daily management, stingrays like to inhabit lakes, reservoirs, ponds and other large water surface, where dissolved oxygen, transparency is relatively high, the water environment is better than the pond, so the culture of stingray ponds must maintain fresh water, maintain the transparency of more than 40cm . It is necessary to constantly add new water, preferably well water; properly match with carp seedlings; no fertilization during cultivation; no excessive feeding; nocturnal feeding of aerators should be properly started; Water temperature does not exceed 30 °C; adhere to the tour pond and find problems in a timely manner.
After cultivation, the young fish will be reared for about 20 days, and then it can be used as 2 to 2.5 nnn. The Wuzi Cultivating Pool is generally made of cement pools. Rectangular, net-shaped, and elliptical mesh shapes are all available. The bottom surface is required to be smooth, there are inlet and outlet, and the outlet is blocked with a 40-60 mesh screen. After the raised fish siphons are sucked into the dense-eye sieve cages, the seedlings are counted and counted. Drifting debris is removed, and 1 to 2 thousand larvae are released on 1 square meter. Each day, live bait was harvested from the bait culture ponds and fed one at a time in the morning and one in the early stage. The rotifers were fed in the early stage. In the middle and later stages, larvae and copepods were fed, and fish were weighed with 100 to 120 mesh sieves. The feeding density was appropriately reduced.
Management, shade shelters or concealed objects to avoid glare; to maintain micro-water flow or micro-inflating, to ensure that dissolved oxygen is not less than 4mg/l; non-flowing water pool should change water every day
1/4 to 1/3, stir up the bottom of the pool with a dense mesh cage siphoning or pumping; keep the water temperature does not exceed 30 °C, the water temperature is too high fry easily floating head, disease: the bait to fish after going through the water rinse Hey.
2. Fish species breeding ponds with an area of ​​2000-3000 m2, water depth of about 1.8m, less silt, convenient water and electricity, and quick-lime clear ponds, water injection, fertilization and culture of food organisms, and pools Surrounded by aquatic plants, old mesh, grass curtains and other hidden objects. After the pond food organisms reach the peak and the water quality is stable, they can be planted, and the fry can be placed on the hidden place. The main breeding place is about 20,000 m2 per 667 m2, and then the rearing stock is 2000 larvae. Left and right; polyculture of 0.8 to 10,000 per 667 square meters, only polyculture carp, head lice, oysters, etc., put summer fish fry 2000 ~ 3000, also with a small amount of stocking summer carp seedlings. Polyculture and collocation varieties should be released after the successful domestication of yellow snapper.
After domestication and feeding, 2 to 3 days later, the fry basically adapts to the pond environment, ie domestication and feeding, and feeding the feed in 5 to 6 meters on both sides of the feeding table, 2 to 3 times a day, giving a fixed sound and gradually reducing the investment. Feeding range, and finally fixed to the feeding table, 10d left can be domesticated successfully. There are two kinds of commonly used feeds, one is animal feed (frozen sea bream fish, poultry, internal organs, etc.)-based, with the appropriate mix of flour, bran, multi-dimensional additives hinged meat machine hinge into a soft pellet feed; It is finished pellet feed, which changes the particle size and protein content with the size of the fish. Generally, it is used in the early and middle stages with broken material, protein content is 40% to 45%, and later granular material with particle size of 1.5mm, protein content is 35%~40. %. The seedlings are fed 3 to 4 times a day. The stingrays like to feed in the evening and at night, and they must feed more properly, especially with a feeding machine. Regardless of manual feeding or machine feeding, each feeding time should be not less than 20min, adhere to a small amount of diligent vote, with 80% to 90% of the fish to eat well for the degree.
Daily management, stingrays like to inhabit lakes, reservoirs, ponds and other large water surface, where dissolved oxygen, transparency is relatively high, the water environment is better than the pond, so the culture of stingray ponds must maintain fresh water, maintain the transparency of more than 40cm . It is necessary to constantly add new water, preferably well water; properly match with carp seedlings; no fertilization during cultivation; no excessive feeding; nocturnal feeding of aerators should be properly started; Water temperature does not exceed 30 °C; adhere to the tour pond and find problems in a timely manner.
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