First, seed cultivation
(1) The broodstock should be selected as a broodstock with a strong physique, no damage to the body surface, no parasites, and a body weight above 75g. Mature females have enlarged abdomen with clear outlines, soft, elastic feel. When the abdomen is facing upwards, the abdomen has a visible banded pattern. The part of the ovary falls toward both sides. The abdomen is shallowly grooved and the genital process is light red. The squeezing abdomen is full of free oocysts. It is better for males to have pink genitals.
(II) Artificial oxytocin using human chorionic gonadotropin (HCG), luteinizing hormone-releasing hormone analogue (LRH-A), domoxone (DOM) and salmonid hormone (SGnRH-A) as oxytocin With mixed use, sub-primary and secondary injections, pectoral fin base needles. Injecting HCG once gave the best results.
(C) fertilized egg hatching Fertilized egg hatching should be carried out in the hatchery pool under weak light conditions, using the hydrostatic method and microfluidic method can be, but must be micro-aeration to ensure that the development of embryonic oxygen is sufficient. During the incubation process, bad eggs and dirt should be promptly removed, and 0.5-1.0 ppm of furans or antibiotics should be regularly administered to prevent the occurrence of diseases. The suitable water temperature for hatching is 26～29°C, and the salinity is 20‰～28‰.
(4) For the cultivation of early seedlings, a small cement tank of 20 to 30 cubic meters should be used. In the later period, a cement tank of about 50 cubic meters should be used. The nursery water should be sedimented, sand filtered, and finally filtered into the pool with a 250-mesh sieve. The suitable water temperature for cultivation is 26 to 30°C, the salinity is about 25 ,, and the pH is about 8.2. Inflation should be done using aerated stones to maintain adequate oxygen. The larval rearing density ranges from 5000 to 8,000 tails per cubic meter, the juvenile period is 3000 fishes per cubic meter, and the juvenile period is about 1,500 fishes per cubic meter.
(five) Seedlings are transported in film plastic bags. Each bag contains 7-8 kg of water and 500-1000 tails of seedlings. Oxygen-enriched air occupies 2/3 of the total volume and is tied tightly with a rubber disc. The remote transport application ice control water temperature at 25 ~ 27 °C, transported to the destination after the seedling bag into the pond floating on the water for a while, such as the water temperature in the bag and the pond water temperature and then release the fry.
Second, pond culture
(I) Fishpond conditions Ponds are best used in estuaries or bays where there is ample supply of freshwater. Area of ​​0.5 ~ 1.5 acres is appropriate, with a stone-based pond, sand bottom sediment, and to be flat, convenient water injection, water depth of about 1.5m.
(2) The pond shall drain water before the seedlings are released. After dredging, exposure to the bottom of the pool dry, after exposure to lime per acre with 100 ~ 150kg or bleaching powder 5 ~ 10kg disinfection. After 3 to 5 days, paving tiles, tiles, large-caliber bamboo tubes, scrapped large tires, or gray plastic tubes at the bottom of the pool are used as inhabitable concealed objects. Then the water is filtered with a 40 mesh screen, and the water depth is 60 to 80 cm, and ammonium carbonate is applied. 0.5～1.0kg/mu and superphosphate 0.05～0.10kg/mu fertilizer water. Fertilizer can be used after 3 to 5 days to put the fry. Before putting the seed, the fish must be tested for more than 12 hours. Fish species before entering the pool can be bathed with 5 ppm potassium permanganate solution for about 5 minutes, or they can be sterilized with furazolidone 10 ppm aeration bath for 20 minutes. Be careful to put fish into pool from the edge of the pool when putting it down. For fish with weak viability and death, injury and disability should be picked up in time. Different types of fingerlings should be cultured in large, medium and small pools to avoid the occurrence of residual food. The stocking density of fingerlings should be determined according to the specific conditions of the seedlings. Well-drained and intensively intensively intensively intensively-cultivated ponds range from 4000 to 5000 fish per acre of stock size of 40 to 60 fish per kg, and in poor conditions, larger (20 to 50 acres) ponds can be stocked per acre of 2000 tons. ~ 3000 tails.
(III) Feeding Management
1. Water Quality The quality requirements for water quality in China Wudang are not very strict. Water quality control indicators: water temperature 13~32°C, specific gravity 1.008~1.018, pH value 8.0~9.2, transparency 30~50cm, dissolved oxygen above 4g/L, ammonia nitrogen 0.5ppm or less. It is generally sufficient to change the water once a week. If the salinity is higher than 5‰, fresh water should be properly injected. Every 10 to 15 days, use 5 to 10 kg/mu of quick lime or 0.4 to 0.5 ppm of strong chlorine or 1.0 to 1.2 ppm of bleach to splash the whole pond once.
2. Feeding Chinese Wu Tang Carp likes to eat fresh or chilled small junk fish, shrimp, crab, shellfish and so on. In artificial breeding, the currently selected bait species are mainly live small crabs and flour, and small junk fish and shellfish are supplementary baits. When feeding, grind the small crab with a pulverizer or grind it by hand and add 20% to 30% of the flour. Stir and feed. The fry stage feeds 1 or 2 times a day, and the adult stage feeds once a day or every other day. The amount of feeding depends on the number of fish, feeding, water quality, water temperature, weather, etc. The general feeding amount is fish. From 8% to 10% of body weight, it is advisable to eat basically after 40 minutes. The bait coefficient is generally in the range of 15-18.
Chinese Wu Tang has habits of benthic burrowing. Therefore, we must pay attention to the control of the bottom quality environment, in addition to pay attention to the management of water intake and drainage, to grasp the quality and quantity of feeding, but also pay attention to the food should be cast on the bait stage, and timely out the residual bait. Each mu can be set about 10 bait stations.
3. Heatstroke prevention and overwintering During the high temperature season, especially under the sun exposure, the fish pond must be maintained at a water depth of 1.5m or more, and the concealed objects must be placed in small numbers to allow the fish to disperse and inhabit. In winter, when the water temperature is below 15°C, no food is generally available, and it begins to die below 10°C. Before winter, nutrition and fattening should be strengthened, and the fish should be moved to sheltered or muddy ponds. The hidden inhabitants should be large. Cover it properly.
Third, the harvest of China's Wu Tang long listed until the weight of more than 150g can be listed, catch large stay small, but should try to avoid other breeding species listed on the 10 to November season, in order to sell a good price.
(1) The broodstock should be selected as a broodstock with a strong physique, no damage to the body surface, no parasites, and a body weight above 75g. Mature females have enlarged abdomen with clear outlines, soft, elastic feel. When the abdomen is facing upwards, the abdomen has a visible banded pattern. The part of the ovary falls toward both sides. The abdomen is shallowly grooved and the genital process is light red. The squeezing abdomen is full of free oocysts. It is better for males to have pink genitals.
(II) Artificial oxytocin using human chorionic gonadotropin (HCG), luteinizing hormone-releasing hormone analogue (LRH-A), domoxone (DOM) and salmonid hormone (SGnRH-A) as oxytocin With mixed use, sub-primary and secondary injections, pectoral fin base needles. Injecting HCG once gave the best results.
(C) fertilized egg hatching Fertilized egg hatching should be carried out in the hatchery pool under weak light conditions, using the hydrostatic method and microfluidic method can be, but must be micro-aeration to ensure that the development of embryonic oxygen is sufficient. During the incubation process, bad eggs and dirt should be promptly removed, and 0.5-1.0 ppm of furans or antibiotics should be regularly administered to prevent the occurrence of diseases. The suitable water temperature for hatching is 26～29°C, and the salinity is 20‰～28‰.
(4) For the cultivation of early seedlings, a small cement tank of 20 to 30 cubic meters should be used. In the later period, a cement tank of about 50 cubic meters should be used. The nursery water should be sedimented, sand filtered, and finally filtered into the pool with a 250-mesh sieve. The suitable water temperature for cultivation is 26 to 30°C, the salinity is about 25 ,, and the pH is about 8.2. Inflation should be done using aerated stones to maintain adequate oxygen. The larval rearing density ranges from 5000 to 8,000 tails per cubic meter, the juvenile period is 3000 fishes per cubic meter, and the juvenile period is about 1,500 fishes per cubic meter.
(five) Seedlings are transported in film plastic bags. Each bag contains 7-8 kg of water and 500-1000 tails of seedlings. Oxygen-enriched air occupies 2/3 of the total volume and is tied tightly with a rubber disc. The remote transport application ice control water temperature at 25 ~ 27 °C, transported to the destination after the seedling bag into the pond floating on the water for a while, such as the water temperature in the bag and the pond water temperature and then release the fry.
Second, pond culture
(I) Fishpond conditions Ponds are best used in estuaries or bays where there is ample supply of freshwater. Area of ​​0.5 ~ 1.5 acres is appropriate, with a stone-based pond, sand bottom sediment, and to be flat, convenient water injection, water depth of about 1.5m.
(2) The pond shall drain water before the seedlings are released. After dredging, exposure to the bottom of the pool dry, after exposure to lime per acre with 100 ~ 150kg or bleaching powder 5 ~ 10kg disinfection. After 3 to 5 days, paving tiles, tiles, large-caliber bamboo tubes, scrapped large tires, or gray plastic tubes at the bottom of the pool are used as inhabitable concealed objects. Then the water is filtered with a 40 mesh screen, and the water depth is 60 to 80 cm, and ammonium carbonate is applied. 0.5～1.0kg/mu and superphosphate 0.05～0.10kg/mu fertilizer water. Fertilizer can be used after 3 to 5 days to put the fry. Before putting the seed, the fish must be tested for more than 12 hours. Fish species before entering the pool can be bathed with 5 ppm potassium permanganate solution for about 5 minutes, or they can be sterilized with furazolidone 10 ppm aeration bath for 20 minutes. Be careful to put fish into pool from the edge of the pool when putting it down. For fish with weak viability and death, injury and disability should be picked up in time. Different types of fingerlings should be cultured in large, medium and small pools to avoid the occurrence of residual food. The stocking density of fingerlings should be determined according to the specific conditions of the seedlings. Well-drained and intensively intensively intensively intensively-cultivated ponds range from 4000 to 5000 fish per acre of stock size of 40 to 60 fish per kg, and in poor conditions, larger (20 to 50 acres) ponds can be stocked per acre of 2000 tons. ~ 3000 tails.
(III) Feeding Management
1. Water Quality The quality requirements for water quality in China Wudang are not very strict. Water quality control indicators: water temperature 13~32°C, specific gravity 1.008~1.018, pH value 8.0~9.2, transparency 30~50cm, dissolved oxygen above 4g/L, ammonia nitrogen 0.5ppm or less. It is generally sufficient to change the water once a week. If the salinity is higher than 5‰, fresh water should be properly injected. Every 10 to 15 days, use 5 to 10 kg/mu of quick lime or 0.4 to 0.5 ppm of strong chlorine or 1.0 to 1.2 ppm of bleach to splash the whole pond once.
2. Feeding Chinese Wu Tang Carp likes to eat fresh or chilled small junk fish, shrimp, crab, shellfish and so on. In artificial breeding, the currently selected bait species are mainly live small crabs and flour, and small junk fish and shellfish are supplementary baits. When feeding, grind the small crab with a pulverizer or grind it by hand and add 20% to 30% of the flour. Stir and feed. The fry stage feeds 1 or 2 times a day, and the adult stage feeds once a day or every other day. The amount of feeding depends on the number of fish, feeding, water quality, water temperature, weather, etc. The general feeding amount is fish. From 8% to 10% of body weight, it is advisable to eat basically after 40 minutes. The bait coefficient is generally in the range of 15-18.
Chinese Wu Tang has habits of benthic burrowing. Therefore, we must pay attention to the control of the bottom quality environment, in addition to pay attention to the management of water intake and drainage, to grasp the quality and quantity of feeding, but also pay attention to the food should be cast on the bait stage, and timely out the residual bait. Each mu can be set about 10 bait stations.
3. Heatstroke prevention and overwintering During the high temperature season, especially under the sun exposure, the fish pond must be maintained at a water depth of 1.5m or more, and the concealed objects must be placed in small numbers to allow the fish to disperse and inhabit. In winter, when the water temperature is below 15°C, no food is generally available, and it begins to die below 10°C. Before winter, nutrition and fattening should be strengthened, and the fish should be moved to sheltered or muddy ponds. The hidden inhabitants should be large. Cover it properly.
Third, the harvest of China's Wu Tang long listed until the weight of more than 150g can be listed, catch large stay small, but should try to avoid other breeding species listed on the 10 to November season, in order to sell a good price.
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