Red-eye, also known as red-eye, is a scorpion-shaped head, a cockroach, and a yakuroidea. Naturally distributed in the slow-flowing waters of rivers and lakes, it is a rare wild economic fish of the Yangtze River. Red-eyed quail meat is delicious, delicate meat, adaptability, omnivorous, habitat in the water layer. Tests have shown that it is easy to artificially domesticate and breed and have excellent development prospects.
The red-eyed grasshopper resembles a grass carp, its body color is silver-white, and its back is slightly dark gray. The upper edge of the eye has a prominent red spot, hence the name red eye.
First, the collection of broodstock, domestication and cultivation According to surveys of fishermen along the Yangtze River, red-cheeked turtles live in rivers, rivers, reeds, grass and other gullies and other stagnation areas. The fish were common fish in the above waters in the 1980s, but the number was much lower than in the past. Since the 1990s, it is rare, especially in recent years. In the winter and spring of 2001 and 2002, we collected only 45 tails and 200-600 g/tail in Jingjiang and Taixing rivers. In addition, the fish swiftly jumps, and it is easy to damage and cause death after catching it. The transportation is also inconvenient, and the collection is difficult and the mortality rate is high. In order to improve the collection and transportation survival rate, we have adopted a number of experimental studies to adopt the methods of anesthesia retention and transportation and achieved good results.
Domestication and breeding ponds cover an area of ​​1 mu, with water depth of 1.5 to 2 meters, and 15 to 20 centimeters of sludge at the bottom of the pool. The water resources of the Yangtze River are free of pollution, and clear lime ponds are used.
In addition to stocking a small amount of flowers and white fleas in the cultivation pool, no other fish were put in the culturing pond, and the feed was fed with a spotted prostaglandin, and adult fish floating material was used instead of the crude protein. The crude protein was 32%. Feed once a day in the afternoon and in the afternoon, and the amount of feeding should be 15 to 20 minutes after the meal is finished. At the end of April and early May, the duckweed was started to increase and the transparency of the water body was maintained at about 30 cm and the dissolved oxygen was above 5 mg/l. Through meticulous feeding and management by dedicated personnel, after a year of domestication and cultivation, the tail gains 550-650 grams, and a good domestication and breeding effect has been achieved.
Bred broodstock cultivation is the key to successful artificial reproduction, so it is very important for broodstock breeding. On the basis of daily management, we further strengthened the pre-winter feeding work and appropriately increased animal feed. Disinfect the whole pool before winter and deepen the pool water to 2 meters to make it safe for winter. After the winter, it adopts the method of pulling the net to turn the sediment, enhance the ventilation of the bottom of the pool, break the clustering state of the fish, promote the early eating of the fish, and appropriately lower the water level, so as to improve the water temperature and improve the fish's feeding capacity. The appropriate amount of feed was started in March, gradually attracting food to observe the fish's feeding activities. In April, duckweed was added. In May, a certain amount of broodstock can be kept in the pond to meet the nutritional needs of the broodstock and promote gonad development.
Second, the artificial reproduction test The common eye of a common eye is sexual maturity after two winters, and spawning period is from June to August in natural waters.
1. In June 2003, based on examination of gonad development in broodstock, the urine was pulled on the net at 8:00 am on July 17. Two females with well-developed gonads and one male with lightly pressed visible semen were selected. Induction injection, water temperature 26.5 °C. Oxygen production drugs used a combination of drugs such as luteinizing hormone-releasing hormone analogues on the basis of experimental studies in 2002. One-needle injection and two-needle injection were performed respectively. The male fish was injected with the appropriate amount of oxytocin at the first injection of female fish. Agent. For ease of inspection, fish are placed in cages for stocking after injection. At 8:30 in the evening, females who had been injected with a needle were successfully inseminated. Another female was given a second injection. After 8 hours, artificial insemination was performed. However, due to less male semen, the fertility rate is slightly worse, and two females are estimated to produce about 500,000 eggs.
2. incubation
(1) Incubation tool 1 Floating plate: divided into 1 meter 1 meter 0.15 meter and 1 meter 0.5 meter 0.15 meter two specifications. It is made of wooden planks, framed and screened at the bottom with a sieve. The floating plate is used for hatching eggs and floats on the surface.
2 cement pool: specifications 4 meters 2 meters 1 meter, with inlet and outlet valve. Place floating plate to continue hatching after hatching fish eggs and stripping fry.
(2) Water for incubating the Yangtze River Before use, sedimentation, disinfection, and sand filtration are used to ensure that the water is fresh.
(3) Incubation method Set the floating plate in the cement pool, put 6 floating plates per tank, three in each size, and set up 12 floating plates in the two cement pools, and put 50,000 eggs per square meter floating plate. There is a spray head above the floating plate, and the air stone is placed in the floating plate to inflate oxygen. The eggs are turned evenly on the floating plate and there is no dead space. The incubation temperature is 27-28.9°C.
The red-eyed oystercatcher is a sunken egg with a gray-yellowish color and a particle size of about 1.2 mm. After water absorption, the egg diameter is basically stable at about 5 mm, and is suspended in dynamic water.
After 10 hours of incubation, the fertilization rate was about 62%. After 20 hours of incubation, the rate of fertilization began to be released. After 24 hours, the removal of the membrane was almost complete, and a few eggs were removed for 30 hours.
After the film is removed, the fry is transferred from the floating plate into the cement pool to continue cultivation. The air stone is evenly set in the pool to increase oxygen, and at the same time it plays the role of inverting the water flow. After inspection, there is no stagnation area, and the seedlings are evenly distributed. Incubation of 65-hour fry began to swim flat and strong. On the morning of July 22, the fry was out of the pool and the hatching time was 105 hours. There were 250,000 fry in the pond and the hatching rate was over 80%.
The combined hatching method of float plate and cement pool adopts aeration and turning water technology combined with spraying and inflating in the whole incubation process. The water quality was controlled through siphon drainage, drainage, and appropriate amount of water, achieving a good hatching effect.
Third, fish breeding
1. Cultivation pond
The No. 1 test pool covers an area of ​​1.6 mu with a water depth of 1-1.5 meters. It is sterilized and filtered with strong chlorine.
2. Water Quality Breeding fish The first two days before the lower ponds, 150 kg of fully-fermented chicken manure is applied. The water is oily green, the water quality is cool, and the transparency is about 30 cm. In the rear of the fish seedlings with soy milk, to maintain good water quality.
3. Under the management of feeding ponds, 250,000 fish were raised and 150,000 acres were planted. After the fry are stocked, the soybean milk is sprayed twice a day. Each time 0.5 kg of soybeans is used, and gradually increased to 1 kg. Soybean milk is splashed for 10 days. The water quality of the fry is satisfied with the requirements of the fry on natural food organisms. Soybean milk is also a direct bait for fry, achieving Good and stable water quality. After 10 days, additional soybean meal and sub-powder water were used to modulate and feed water intermittently along the water's edge. Feeding was gradually reduced and the use of milk was gradually reduced. Followed by the gradual transitional feeding of spotted fork-tailed micro-particle buoyant batch materials, all micro-granules were used after five or six days, and they were fed once every day in the afternoon and afternoon, and the amount of bait was basically finished after 20 minutes.
4. Water quality regulation
Add water once every 5-7 days, 5-10 cm each time. 15 days use of biological bacteria, keep the water cool, transparency 25-30 cm, dissolved oxygen 4-5 mg/L, pH 7.4-7.6.
5. The growth situation and stocking ponds were reared for more than 20 days, and on August 11th, the summer flower specifications had reached 3-4 cm, and the survival rate was over 70%. Due to the high density of ponds, on the 20th of August, 355,000 ponds were hauled into the net, and the fish species were cultivated in three ponds of 1.5 mu and two 2 mu with a density of 10,000 mu.
After the ponds were split, they were continued to be fed with catfish and pontoons, and a small amount of fish was used to cultivate the fish species. On September 25th, the inspection specifications of the pull nets reached more than 10 cm, and the survival rate was over 90%. The incubation period of less than 70 days reached the 10 cm specification, which indicates that the growth stage of the red-eye turtle has a faster growth rate.
The red-eyed grasshopper resembles a grass carp, its body color is silver-white, and its back is slightly dark gray. The upper edge of the eye has a prominent red spot, hence the name red eye.
First, the collection of broodstock, domestication and cultivation According to surveys of fishermen along the Yangtze River, red-cheeked turtles live in rivers, rivers, reeds, grass and other gullies and other stagnation areas. The fish were common fish in the above waters in the 1980s, but the number was much lower than in the past. Since the 1990s, it is rare, especially in recent years. In the winter and spring of 2001 and 2002, we collected only 45 tails and 200-600 g/tail in Jingjiang and Taixing rivers. In addition, the fish swiftly jumps, and it is easy to damage and cause death after catching it. The transportation is also inconvenient, and the collection is difficult and the mortality rate is high. In order to improve the collection and transportation survival rate, we have adopted a number of experimental studies to adopt the methods of anesthesia retention and transportation and achieved good results.
Domestication and breeding ponds cover an area of ​​1 mu, with water depth of 1.5 to 2 meters, and 15 to 20 centimeters of sludge at the bottom of the pool. The water resources of the Yangtze River are free of pollution, and clear lime ponds are used.
In addition to stocking a small amount of flowers and white fleas in the cultivation pool, no other fish were put in the culturing pond, and the feed was fed with a spotted prostaglandin, and adult fish floating material was used instead of the crude protein. The crude protein was 32%. Feed once a day in the afternoon and in the afternoon, and the amount of feeding should be 15 to 20 minutes after the meal is finished. At the end of April and early May, the duckweed was started to increase and the transparency of the water body was maintained at about 30 cm and the dissolved oxygen was above 5 mg/l. Through meticulous feeding and management by dedicated personnel, after a year of domestication and cultivation, the tail gains 550-650 grams, and a good domestication and breeding effect has been achieved.
Bred broodstock cultivation is the key to successful artificial reproduction, so it is very important for broodstock breeding. On the basis of daily management, we further strengthened the pre-winter feeding work and appropriately increased animal feed. Disinfect the whole pool before winter and deepen the pool water to 2 meters to make it safe for winter. After the winter, it adopts the method of pulling the net to turn the sediment, enhance the ventilation of the bottom of the pool, break the clustering state of the fish, promote the early eating of the fish, and appropriately lower the water level, so as to improve the water temperature and improve the fish's feeding capacity. The appropriate amount of feed was started in March, gradually attracting food to observe the fish's feeding activities. In April, duckweed was added. In May, a certain amount of broodstock can be kept in the pond to meet the nutritional needs of the broodstock and promote gonad development.
Second, the artificial reproduction test The common eye of a common eye is sexual maturity after two winters, and spawning period is from June to August in natural waters.
1. In June 2003, based on examination of gonad development in broodstock, the urine was pulled on the net at 8:00 am on July 17. Two females with well-developed gonads and one male with lightly pressed visible semen were selected. Induction injection, water temperature 26.5 °C. Oxygen production drugs used a combination of drugs such as luteinizing hormone-releasing hormone analogues on the basis of experimental studies in 2002. One-needle injection and two-needle injection were performed respectively. The male fish was injected with the appropriate amount of oxytocin at the first injection of female fish. Agent. For ease of inspection, fish are placed in cages for stocking after injection. At 8:30 in the evening, females who had been injected with a needle were successfully inseminated. Another female was given a second injection. After 8 hours, artificial insemination was performed. However, due to less male semen, the fertility rate is slightly worse, and two females are estimated to produce about 500,000 eggs.
2. incubation
(1) Incubation tool 1 Floating plate: divided into 1 meter 1 meter 0.15 meter and 1 meter 0.5 meter 0.15 meter two specifications. It is made of wooden planks, framed and screened at the bottom with a sieve. The floating plate is used for hatching eggs and floats on the surface.
2 cement pool: specifications 4 meters 2 meters 1 meter, with inlet and outlet valve. Place floating plate to continue hatching after hatching fish eggs and stripping fry.
(2) Water for incubating the Yangtze River Before use, sedimentation, disinfection, and sand filtration are used to ensure that the water is fresh.
(3) Incubation method Set the floating plate in the cement pool, put 6 floating plates per tank, three in each size, and set up 12 floating plates in the two cement pools, and put 50,000 eggs per square meter floating plate. There is a spray head above the floating plate, and the air stone is placed in the floating plate to inflate oxygen. The eggs are turned evenly on the floating plate and there is no dead space. The incubation temperature is 27-28.9°C.
The red-eyed oystercatcher is a sunken egg with a gray-yellowish color and a particle size of about 1.2 mm. After water absorption, the egg diameter is basically stable at about 5 mm, and is suspended in dynamic water.
After 10 hours of incubation, the fertilization rate was about 62%. After 20 hours of incubation, the rate of fertilization began to be released. After 24 hours, the removal of the membrane was almost complete, and a few eggs were removed for 30 hours.
After the film is removed, the fry is transferred from the floating plate into the cement pool to continue cultivation. The air stone is evenly set in the pool to increase oxygen, and at the same time it plays the role of inverting the water flow. After inspection, there is no stagnation area, and the seedlings are evenly distributed. Incubation of 65-hour fry began to swim flat and strong. On the morning of July 22, the fry was out of the pool and the hatching time was 105 hours. There were 250,000 fry in the pond and the hatching rate was over 80%.
The combined hatching method of float plate and cement pool adopts aeration and turning water technology combined with spraying and inflating in the whole incubation process. The water quality was controlled through siphon drainage, drainage, and appropriate amount of water, achieving a good hatching effect.
Third, fish breeding
1. Cultivation pond
The No. 1 test pool covers an area of ​​1.6 mu with a water depth of 1-1.5 meters. It is sterilized and filtered with strong chlorine.
2. Water Quality Breeding fish The first two days before the lower ponds, 150 kg of fully-fermented chicken manure is applied. The water is oily green, the water quality is cool, and the transparency is about 30 cm. In the rear of the fish seedlings with soy milk, to maintain good water quality.
3. Under the management of feeding ponds, 250,000 fish were raised and 150,000 acres were planted. After the fry are stocked, the soybean milk is sprayed twice a day. Each time 0.5 kg of soybeans is used, and gradually increased to 1 kg. Soybean milk is splashed for 10 days. The water quality of the fry is satisfied with the requirements of the fry on natural food organisms. Soybean milk is also a direct bait for fry, achieving Good and stable water quality. After 10 days, additional soybean meal and sub-powder water were used to modulate and feed water intermittently along the water's edge. Feeding was gradually reduced and the use of milk was gradually reduced. Followed by the gradual transitional feeding of spotted fork-tailed micro-particle buoyant batch materials, all micro-granules were used after five or six days, and they were fed once every day in the afternoon and afternoon, and the amount of bait was basically finished after 20 minutes.
4. Water quality regulation
Add water once every 5-7 days, 5-10 cm each time. 15 days use of biological bacteria, keep the water cool, transparency 25-30 cm, dissolved oxygen 4-5 mg/L, pH 7.4-7.6.
5. The growth situation and stocking ponds were reared for more than 20 days, and on August 11th, the summer flower specifications had reached 3-4 cm, and the survival rate was over 70%. Due to the high density of ponds, on the 20th of August, 355,000 ponds were hauled into the net, and the fish species were cultivated in three ponds of 1.5 mu and two 2 mu with a density of 10,000 mu.
After the ponds were split, they were continued to be fed with catfish and pontoons, and a small amount of fish was used to cultivate the fish species. On September 25th, the inspection specifications of the pull nets reached more than 10 cm, and the survival rate was over 90%. The incubation period of less than 70 days reached the 10 cm specification, which indicates that the growth stage of the red-eye turtle has a faster growth rate.
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