Barbed fish and fish
2018-06-08 18:02:16
I. Characteristics of the species The barbed fish and barnacles belong to the genus Oxymorpha, Acipenseridae, Tetrigoidea, and Barb, and are distributed in various river systems south of the Yangtze River. It is a large-scale, high-quality economic fish in China's rivers. Its beautiful appearance, bright body color, good meat quality, and delicious taste make it a medium-top edible fish while also serving as a good ornamental fish.
Barbed fish diet is mainly herbivorous and eats other omnivorous fish. The main foods are aquatic plants, organic detritus, etc. They also like to eat artificially-fed vegetables, bran, rice bran, peanut bran, artificial compound feed, etc., indicating that their diet is mixed and extensive, and their adaptability is strong. The barbed fish and barrams grow fast. Under better culture conditions, the annual growth (referred to as winter seedlings) is more than 750 grams.
Barbed fish sex mature age to be further confirmed, I use the broodstock body weight is generally more than 2 kilograms, artificial reproduction test results show that: mature eggs with weak viscosity, golden yellow, non-absorbed egg diameter of about 2 mm, water swelling to the maximum The egg diameter is about 3.5 mm.
Second, artificial breeding
1. Origin and cultivation of broodstock
(1) Source of broodstock: The broodstock used in this pilot project is a natural seedling, which is returned to the pond for artificial domestication for more than a few years after harvesting, and it is artificially intensively cultivated.
(2) Breeding of broodstock: Broodstock are bred in ponds of approximately 3 acres each, either in monoculture ponds or in mixed ponds cultivated in ponds where the main four fishes are raised. From 1997 to 1998, exploratory domestication was adopted. , Normal cultivation and breeding, since 1999, to enter the intensive training of broodstock, in addition to the general feed, feeding young leafy vegetables, peanut bran, grain buds, corn shoots, bean sprouts and other feed, while strengthening the replacement of water quality management.
2. Induction of oxytocin The progeny of the broodstock is induced by conventional oxytocin (such as LRH-A, PG, HCG, and DOM) under the specific guidance of the clinician Professor Chen Xiang? of the fish department of the South China Normal University Department of Fish Research. One or two injection methods, the male and female fish dose is half of the female fish, the effect time is 10-12 hours, the appropriate water temperature for oxysterone production is 23-28°C, and the barbed fish bark has the habit of batch spawning. It is expected that after spawning The broodstock is reared for another 2-3 months, and a second artificial breeding can be performed.
3, artificial insemination in the estrus estrus, timely collection of broodstock check, when the light pressure abdominal granules outflow smooth and golden luster, can be artificial insemination.
4. The fertilized eggs of the barbed spiny barbarians were weakly viscous. In order to facilitate the observation and elimination of dead eggs and dead seedlings, the authors used the two methods of still water (filling oxygen with large bowls) and microfluidic water for both of them. In the water temperature of 24-28 °C, the time from fertilization to filming lasted 48-52 hours, the time before and after the filming of the same batch of fertilized eggs could differ by more than 4 hours, and the hatching rate was generally more than 80%.
5, when the larvae have just emerged from the membrane, the total length is about 8.5 mm, the activity is less, often lying on the water bottom, and occasionally doing up and down movement. At this time, the larvae have larger yolk sac, which is in the endogenous nutrition period without feeding. . Four days after the film appeared, the larvae appeared to swim flat. The yolk sac consumed more than half of the vegetative period, and a small amount of pig blood or plankton could be fed. About 7 days after filming, the yolk sac disappears as an exogenous vegetative period. At this time, a sufficient amount of food should be fed. After a few days (10-12 days), the ability to wait for activity will increase, and it will be transferred to a larger, disinfected earthen pond. Nurture.
Third, adult fish breeding
According to the three-pond pond special culture trials of Yanggong Leigongkeng Village of Yangcheng County and Zhangchun Township of Shiluo Town, we collected 10-15 cm seedlings of natural seedlings. The input materials should be sufficient, and the management should keep the water quality clean. The water flow is better. Under normal circumstances, after 10-18 months of cultivation, the body weight can reach 750-1000 grams and 400 kg per mu.
Fourth, the development prospects
1. The cultivation of barbed fish and barnacles in pond culture has just started in recent years and is now due to the shortage of seedlings. Therefore, the profit from breeding is much higher than that of conventional farmed fish and will last for 3-5 years. With the success of artificial breeding and the popularization and promotion of farming, the price of barbed fish and fish bar will decrease. According to the analysis of the fish's succulent color and body color and its seed supply status, it can be used as a "vegetable blue-breeding" culture. Can be used for ornamental fish sales, although the promotion of breeding, barbed fish and fish into the fish price can be stabilized at about 40 yuan / kg, due to barbed fish culture requirements are not high, the cost is not, even if sold at 40 yuan / kg , 400 kilograms per mu, acres of profit can be 8,000 yuan, and barbed fish farming is suitable for most areas of China, the promotion of aquaculture economic benefits, the prospects are bright.
2. The river proliferating barbed fish formerly was an important economic fish of rivers. Due to over 10 years of extreme fisherman overcharging and water pollution, river barbed barbed fish production has been declining year by year, individual river sections have even disappeared, and resources have been exhausted. Degree, the success of artificial breeding of barbed fish, provides important technical support for the restoration of its resources, and is of great significance for the protection of ecological diversity.
â– Technical background
In 1995, the Yangshan County Fisheries Bureau discovered that barbed fish and fish have the advantages of good body shape, beautiful color, large individual size, strong adaptability, feeding mainly on herbivorous, etc., and their meat is fresh and refreshing. It is a folk “fish and fish†dish that has been deeply loved by the people. Over the years, due to serious human damage, the number of barbed fish and fishes in Lianjiang River has been declining. For this reason, the Bureau has both developed and utilized mountainous areas from resource protection. Starting from the characteristics of fisheries, it began in 1997 to carry out preliminary experiments on artificial domestication of barbed fish and cultivation of broodstock. In July of this year, the artificial propagation experiment was conducted again. After several batches of hatching practices, preliminary knowledge of artificial propagation techniques was obtained and a small number of reproduction stages were entered. At the same time as research on artificial propagation techniques, the Bureau also conducted trials of seedling cultivation and adult fish breeding, all of which achieved very good results. The bureau has about 20,000 fish fry 2-2.5 cm and about 10,000 fish flowers.
Barbed fish diet is mainly herbivorous and eats other omnivorous fish. The main foods are aquatic plants, organic detritus, etc. They also like to eat artificially-fed vegetables, bran, rice bran, peanut bran, artificial compound feed, etc., indicating that their diet is mixed and extensive, and their adaptability is strong. The barbed fish and barrams grow fast. Under better culture conditions, the annual growth (referred to as winter seedlings) is more than 750 grams.
Barbed fish sex mature age to be further confirmed, I use the broodstock body weight is generally more than 2 kilograms, artificial reproduction test results show that: mature eggs with weak viscosity, golden yellow, non-absorbed egg diameter of about 2 mm, water swelling to the maximum The egg diameter is about 3.5 mm.
Second, artificial breeding
1. Origin and cultivation of broodstock
(1) Source of broodstock: The broodstock used in this pilot project is a natural seedling, which is returned to the pond for artificial domestication for more than a few years after harvesting, and it is artificially intensively cultivated.
(2) Breeding of broodstock: Broodstock are bred in ponds of approximately 3 acres each, either in monoculture ponds or in mixed ponds cultivated in ponds where the main four fishes are raised. From 1997 to 1998, exploratory domestication was adopted. , Normal cultivation and breeding, since 1999, to enter the intensive training of broodstock, in addition to the general feed, feeding young leafy vegetables, peanut bran, grain buds, corn shoots, bean sprouts and other feed, while strengthening the replacement of water quality management.
2. Induction of oxytocin The progeny of the broodstock is induced by conventional oxytocin (such as LRH-A, PG, HCG, and DOM) under the specific guidance of the clinician Professor Chen Xiang? of the fish department of the South China Normal University Department of Fish Research. One or two injection methods, the male and female fish dose is half of the female fish, the effect time is 10-12 hours, the appropriate water temperature for oxysterone production is 23-28°C, and the barbed fish bark has the habit of batch spawning. It is expected that after spawning The broodstock is reared for another 2-3 months, and a second artificial breeding can be performed.
3, artificial insemination in the estrus estrus, timely collection of broodstock check, when the light pressure abdominal granules outflow smooth and golden luster, can be artificial insemination.
4. The fertilized eggs of the barbed spiny barbarians were weakly viscous. In order to facilitate the observation and elimination of dead eggs and dead seedlings, the authors used the two methods of still water (filling oxygen with large bowls) and microfluidic water for both of them. In the water temperature of 24-28 °C, the time from fertilization to filming lasted 48-52 hours, the time before and after the filming of the same batch of fertilized eggs could differ by more than 4 hours, and the hatching rate was generally more than 80%.
5, when the larvae have just emerged from the membrane, the total length is about 8.5 mm, the activity is less, often lying on the water bottom, and occasionally doing up and down movement. At this time, the larvae have larger yolk sac, which is in the endogenous nutrition period without feeding. . Four days after the film appeared, the larvae appeared to swim flat. The yolk sac consumed more than half of the vegetative period, and a small amount of pig blood or plankton could be fed. About 7 days after filming, the yolk sac disappears as an exogenous vegetative period. At this time, a sufficient amount of food should be fed. After a few days (10-12 days), the ability to wait for activity will increase, and it will be transferred to a larger, disinfected earthen pond. Nurture.
Third, adult fish breeding
According to the three-pond pond special culture trials of Yanggong Leigongkeng Village of Yangcheng County and Zhangchun Township of Shiluo Town, we collected 10-15 cm seedlings of natural seedlings. The input materials should be sufficient, and the management should keep the water quality clean. The water flow is better. Under normal circumstances, after 10-18 months of cultivation, the body weight can reach 750-1000 grams and 400 kg per mu.
Fourth, the development prospects
1. The cultivation of barbed fish and barnacles in pond culture has just started in recent years and is now due to the shortage of seedlings. Therefore, the profit from breeding is much higher than that of conventional farmed fish and will last for 3-5 years. With the success of artificial breeding and the popularization and promotion of farming, the price of barbed fish and fish bar will decrease. According to the analysis of the fish's succulent color and body color and its seed supply status, it can be used as a "vegetable blue-breeding" culture. Can be used for ornamental fish sales, although the promotion of breeding, barbed fish and fish into the fish price can be stabilized at about 40 yuan / kg, due to barbed fish culture requirements are not high, the cost is not, even if sold at 40 yuan / kg , 400 kilograms per mu, acres of profit can be 8,000 yuan, and barbed fish farming is suitable for most areas of China, the promotion of aquaculture economic benefits, the prospects are bright.
2. The river proliferating barbed fish formerly was an important economic fish of rivers. Due to over 10 years of extreme fisherman overcharging and water pollution, river barbed barbed fish production has been declining year by year, individual river sections have even disappeared, and resources have been exhausted. Degree, the success of artificial breeding of barbed fish, provides important technical support for the restoration of its resources, and is of great significance for the protection of ecological diversity.
â– Technical background
In 1995, the Yangshan County Fisheries Bureau discovered that barbed fish and fish have the advantages of good body shape, beautiful color, large individual size, strong adaptability, feeding mainly on herbivorous, etc., and their meat is fresh and refreshing. It is a folk “fish and fish†dish that has been deeply loved by the people. Over the years, due to serious human damage, the number of barbed fish and fishes in Lianjiang River has been declining. For this reason, the Bureau has both developed and utilized mountainous areas from resource protection. Starting from the characteristics of fisheries, it began in 1997 to carry out preliminary experiments on artificial domestication of barbed fish and cultivation of broodstock. In July of this year, the artificial propagation experiment was conducted again. After several batches of hatching practices, preliminary knowledge of artificial propagation techniques was obtained and a small number of reproduction stages were entered. At the same time as research on artificial propagation techniques, the Bureau also conducted trials of seedling cultivation and adult fish breeding, all of which achieved very good results. The bureau has about 20,000 fish fry 2-2.5 cm and about 10,000 fish flowers.