Carp breeding technology
2018-05-25 01:43:24
Breeding biology carp can breed in our country, in the north of spawning period from September to November. The south is from November to January. The sexual mature age is 3 years old and 4 years old. The females spawned about 100,000 eggs per kilogram of body weight. Spawning in batches, mature eggs with a single oil ball, was floating, the eggs by 1.22mm?. 45mm, a few more than 1.50mm. Fertilized eggs were incubated at water temperatures of 16°C-19°C and decapsulated by incubation for 3 days to 4 days. The newly hatched larvae have a total length of 4.42mm-4.6mm, and 4 days after hatching, the yolk yam bundle is nearly exhausted, and the mouth cracks approximately 0.75mm to .80mm, and feeding is started.
There are two sources of broodstock-derived broodstock, one is the capture of wild mature individuals in the sea and the other is the selection of breeding groups. The best catching broodstock for the sea is the harvest of the fixed net, which is not easy to hurt and is easy to raise and survive. The broodstock is transported by the water tank in the vehicle and the pool is held by air. For wounded broodstock, potassium permanganate, malachite green and other drugs can be used for surface disinfection, and if necessary, gentamicin can be injected to ensure its recovery.
Oxygen production, fertilization and broodstock rearing are adapted to the environment and artificial oxytocin production is performed. Oxotropic agents are gonadotropin-releasing hormone analogues (LRH?A) and human chorionic gonadotropin (HCG), both of which are effective either in combination or alone. According to the maturity of the broodstock, the amount and ratio of both should be determined. The maturation of the broodstock in the sea is quite different, and mature broodstock are injected ovulation after 24 to 36 hours. When the mature eggs can be extruded, dry or wet fertilization is performed in the box, and the seawater is stirred for 5 minutes so that the sperm and eggs can be evenly connected to ensure a high fertility rate.
Incubation and Embryonic Development The fertilized eggs are buoyant, placed in a conical cage, egg cage size, and box diameter 80 cm. The height of the box is 60cm and the height of the cone is 40cm. The oviposition densities were 1.1 million grains/m3 to 500,000 grains/m3. Bottom air stone is inflated. The amount of aeration is based on the fact that the water body in the net can turn slowly and uniformly. The hatching water is best filtered by precipitation. Change water 2-3 times a day and update one full amount. Wash the wall once every 2 hours to prevent the embryos from hanging on the wall and remove dead individuals in time. The incubation time varies with water temperature, and larvae hatch after about 3-5 days. As long as you maintain clean water and adequate dissolved oxygen, you can get 80% of the hatching rate.
The larval rearing and rearing of young fishes can be artificially cultivated in the room, and it can also be cultivated in the outdoor earth ponds. The indoor artificial breeding uses static water, micro-inflating, and regular water change to transition to constant flow. The larval stocking density is 0.5-1.0 thousand/m3. In order to feed the rotifers, artemia, artemia, copepods, and surimi, etc. Can also be used outside the pond ecological fertilizer cultivation.
Pond pond raising (1) Pond conditions and preparation The pond area is suitable for 3300m2-6600m2. The water depth is more than 2m. The water source is sufficient, the water quality is non-pollution, and there is good water intake and drainage facilities and convenient transportation.
Before restocking, the dry pool should be dredged and leveled to protect the slope. The quicklime should be used between 750kg and 1050kg per hectare to keep the water in the pool at 10-20cm and soaked with spatter. After 7 days, add water to 1m deep. In order to maintain the water quality, diammonium 75kg/hm2 can be applied once. After two days, the pool water becomes oil green and can be stocked.
(2) Temporary rearing of fish species and stocking of eel fry species are currently mostly sea catches. Spring spring catches are approximately 2.5 cm-4 cm. Fish are subject to varying degrees of injury as a result of harvesting and transport. In order to increase the survival rate of fish farming, it may be carried out first. Holding in the middle. It is more convenient to set up a 40-mesh cage in the rearing tank. 2000-3000 tails were raised per cubic meter of water body, and they were disinfected with 110-6-210-6 chloramphenicol, and the post-fish furazolidone was consumed. The first 10 days of feeding Artemia larvae or marine freshwater horns, copepods, and then fed fresh fish. The fish species are cultured to about 10 cm and put into a pool at 1.5 tails/m2.
(3) Development Management
A. The feeding of bait is mainly based on low-grade miscellaneous fish, supplemented by artificial ingredients. The squid grabs fast and has a large content. It is very important to ration regularly. When feeding, it is necessary to grasp the fullness of the fish without wasting food. Each time the first feeding of the fish is increased, the feeding amount is increased when the fish is first raised and the fish is fed up. When the fish sinks, the feed is stopped when the food is not caught. The daily feeding amount and the feeding amount vary depending on the season. The optimum temperature for the rapid growth of carp is 4-5 times daily, and the amount of bait is 10-30% of the fish's body weight. Early spring and late autumn at low temperature, and 2-3 times daily feeding, accounting for 1-10% of fish's body weight. .
B. The inspection of the patrol pond will be performed sooner or later. The observations of the patrol pond include the activities of the fish body, the changes in pond water color, odor, transparency, pond escape prevention facilities and predators.
There are two sources of broodstock-derived broodstock, one is the capture of wild mature individuals in the sea and the other is the selection of breeding groups. The best catching broodstock for the sea is the harvest of the fixed net, which is not easy to hurt and is easy to raise and survive. The broodstock is transported by the water tank in the vehicle and the pool is held by air. For wounded broodstock, potassium permanganate, malachite green and other drugs can be used for surface disinfection, and if necessary, gentamicin can be injected to ensure its recovery.
Oxygen production, fertilization and broodstock rearing are adapted to the environment and artificial oxytocin production is performed. Oxotropic agents are gonadotropin-releasing hormone analogues (LRH?A) and human chorionic gonadotropin (HCG), both of which are effective either in combination or alone. According to the maturity of the broodstock, the amount and ratio of both should be determined. The maturation of the broodstock in the sea is quite different, and mature broodstock are injected ovulation after 24 to 36 hours. When the mature eggs can be extruded, dry or wet fertilization is performed in the box, and the seawater is stirred for 5 minutes so that the sperm and eggs can be evenly connected to ensure a high fertility rate.
Incubation and Embryonic Development The fertilized eggs are buoyant, placed in a conical cage, egg cage size, and box diameter 80 cm. The height of the box is 60cm and the height of the cone is 40cm. The oviposition densities were 1.1 million grains/m3 to 500,000 grains/m3. Bottom air stone is inflated. The amount of aeration is based on the fact that the water body in the net can turn slowly and uniformly. The hatching water is best filtered by precipitation. Change water 2-3 times a day and update one full amount. Wash the wall once every 2 hours to prevent the embryos from hanging on the wall and remove dead individuals in time. The incubation time varies with water temperature, and larvae hatch after about 3-5 days. As long as you maintain clean water and adequate dissolved oxygen, you can get 80% of the hatching rate.
The larval rearing and rearing of young fishes can be artificially cultivated in the room, and it can also be cultivated in the outdoor earth ponds. The indoor artificial breeding uses static water, micro-inflating, and regular water change to transition to constant flow. The larval stocking density is 0.5-1.0 thousand/m3. In order to feed the rotifers, artemia, artemia, copepods, and surimi, etc. Can also be used outside the pond ecological fertilizer cultivation.
Pond pond raising (1) Pond conditions and preparation The pond area is suitable for 3300m2-6600m2. The water depth is more than 2m. The water source is sufficient, the water quality is non-pollution, and there is good water intake and drainage facilities and convenient transportation.
Before restocking, the dry pool should be dredged and leveled to protect the slope. The quicklime should be used between 750kg and 1050kg per hectare to keep the water in the pool at 10-20cm and soaked with spatter. After 7 days, add water to 1m deep. In order to maintain the water quality, diammonium 75kg/hm2 can be applied once. After two days, the pool water becomes oil green and can be stocked.
(2) Temporary rearing of fish species and stocking of eel fry species are currently mostly sea catches. Spring spring catches are approximately 2.5 cm-4 cm. Fish are subject to varying degrees of injury as a result of harvesting and transport. In order to increase the survival rate of fish farming, it may be carried out first. Holding in the middle. It is more convenient to set up a 40-mesh cage in the rearing tank. 2000-3000 tails were raised per cubic meter of water body, and they were disinfected with 110-6-210-6 chloramphenicol, and the post-fish furazolidone was consumed. The first 10 days of feeding Artemia larvae or marine freshwater horns, copepods, and then fed fresh fish. The fish species are cultured to about 10 cm and put into a pool at 1.5 tails/m2.
(3) Development Management
A. The feeding of bait is mainly based on low-grade miscellaneous fish, supplemented by artificial ingredients. The squid grabs fast and has a large content. It is very important to ration regularly. When feeding, it is necessary to grasp the fullness of the fish without wasting food. Each time the first feeding of the fish is increased, the feeding amount is increased when the fish is first raised and the fish is fed up. When the fish sinks, the feed is stopped when the food is not caught. The daily feeding amount and the feeding amount vary depending on the season. The optimum temperature for the rapid growth of carp is 4-5 times daily, and the amount of bait is 10-30% of the fish's body weight. Early spring and late autumn at low temperature, and 2-3 times daily feeding, accounting for 1-10% of fish's body weight. .
B. The inspection of the patrol pond will be performed sooner or later. The observations of the patrol pond include the activities of the fish body, the changes in pond water color, odor, transparency, pond escape prevention facilities and predators.