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218results about How to "Reduce deformity rate" patented technology

Hatching device and method for demersal spawns of marine fishes

The invention relates to a hatching device and method for demersal spawns of marine fishes. The hatching device comprises a net cage, a water channel, a bracket, a temperature controller indicator, a probe, a heating rod, a water inlet hose, a sinker, an air inlet hose, an air stone and an annular water injector, wherein the net cage and the bracket are located in the water channel; the net cage is bound on the bracket; the water inlet hose and the air inlet hose are located in the water channel outside the net cage; the upside of the net cage is provided with the annular water injector; and the probe and the heating rod are arranged in the water channel. The hatching method comprises the following steps of: controlling a hatching condition; hatching; carrying out microscopic examination observation; carrying out secondary water temperature controlling; managing routinely; collecting larva fish and the like. The hatching method has the advantages that spawn deposition is avoided because of conical point inflation; spawns adhered on net cage edges are washed at any time by the annular water injector; the net cage is conveniently replaced; the water temperature is stably controlled by an electric temperature controller; and the fresh water quality can be ensured due to water feeding and drainage modes of water feeding of the annular water injector at the upside and water feeding of the water channel at the bottom and overflowing of the periphery of the water channel. Therefore, by means of the hatching device and method, a hatching rate of the demersal spawns of the marine fishes in the industrial fry breeding is improved.
Owner:YELLOW SEA FISHERIES RES INST CHINESE ACAD OF FISHERIES SCI

Diluent of frozen semen of milk goat, and preparation method and diluting method thereof as well as preparation method of frozen semen of milk goat in thin pipe

The invention relates to a diluent of frozen semen of a milk goat, and a preparation method and a diluting method thereof as well as a preparation method of frozen semen of the milk goat in a thin pipe. In an existing frozen semen storage method, sperms are struck by low temperature to cause structure change of plasmalemma, so that the integrity of the plasmalemma and the survival rate and the fertility of the sperms after resuscitation are seriously influenced. The preparation method is characterized in that thin-pipe freezing treatment with two-step dilution and balancing and two-step cooling is carried out on fresh semen, wherein a basic diluent is prepared from Tris, citric acid, glucose, trehalose, Vc, GSH, BSA, ATP, compound antibiotic, yolk and water; a frozen diluent is prepared from the basic diluent and glycerinum; the diluent is utilized for diluting and balancing the fresh semen, and the fresh semen is sub-packaged in thin pipes and is stored in liquid nitrogen. According to the invention, the effects of low-temperature storage and freezing storage of the frozen semen of the milk goat is good, the survival rate, the integration rate of acrosome and the integrity of the plasmalemma of the semen after unfreezing are effectively increased, the aberration rate is reduced and the production efficiency and the quality of the frozen semen of the milk goat are improved.
Owner:NORTHWEST A & F UNIV

Feed for parent fish of Cynoglossus semilaevis

The invention discloses a feed for parent fish of Cynoglossus semilaevis and belongs to a technology for preparing a marine fish compound feed. In the feed, the adding amount of fat is 8 percent, and the ratio of n-3 fatty acid to n-6 fatty acid is 2.81. The fat added into the feed for the parent fish of the Cynoglossus semilaevis is fish oil and soybean oil, and the content of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) in the fish oil is higher than 30 percent; and according to the formula, the feed for the parent fish of the Cynoglossus semilaevis comprises 70 percent of white fish meal, 6 percent of casein, 10 percent of flour, 2 percent of phospholipid, 1 percent of choline, 0.5 percent of vitamin C, 0.5 percent of multi-vitamin, 0.5 percent of complex mineral, 1.5 percent of calcium hydrophosphate, 2.5 percent of soybean oil and 5.5 percent of fish oil. A certain proportion of fish oil which is rich in the EPA and the DHA is added into the feed for the Cynoglossus semilaevis, and is matched with the soybean oil, so that the n-3 fatty acid and the n-6 fatty acid in an appropriate ratio are provided for the Cynoglossus semilaevis, the egg laying amount of the Cynoglossus semilaevis can be improved, the abnormality rate of fries can be reduced, and the lengths of 12-day fries can be increased.
Owner:YELLOW SEA FISHERIES RES INST CHINESE ACAD OF FISHERIES SCI

Industrialized fry cultivation method of oval pompano

The invention relates to an industrialized fry cultivation method of oval pompano. The method comprises the steps of incubation, transfer of the fries, cultivation of fish larva and juvenile, fodder domestication and the like; according to the method, the fry cultivating processes are all conducted indoors, incubating and raising processes are not influenced by weather, and the yield of raised fries is greatly improved; the method can be used for carrying out directed screening to fed bait, and the fry survival rate in the stage is greatly improved; the requirement of fries on EPA and DHA is ensured, and the fry quality is guaranteed; in the process of industrialized cultivation, the temperature, salinity, dissolved oxygen and other factors in a fry cultivating water body are relatively stable, the aberration rate of the fries is effectively reduced, and the survival rate of the fries is improved; a fry separating sifter is utilized to periodically screen the fries, the self-injury of the fries is reduced, the survival rate of the fries is improved, and meanwhile, the homogeneity of the fries is guaranteed; the method has the advantages that the occupied area for industrialized cultivation of the fries is small, the water demand is less, the sewage discharge is less, and the influence on natural environment is small.
Owner:SOUTH CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI

Artificial pollination device for saline-alkali soil greenhouse organisms

The invention provides an artificial pollination device for saline-alkali soil greenhouse organisms. The artificial pollination device comprises a pollen placing chamber, wherein a pollen outlet is formed in the bottom of the pollen placing chamber; the bottom of the pollen placing chamber is connected with a pollination tube at the middle of the pollination tube; a nozzle is formed in the left end of the pollination tube; an air cylinder is arranged at the right end of the pollination tube; an air outlet of the air cylinder is connected with an air outlet pipe; an air spray head is arranged at the tail end of the air outlet pipe; the air spray head is positioned on the right side of the pollen outlet; the air outlet of the air cylinder is also connected with an air inlet pipe; a pressing block is arranged on a piston rod of the air cylinder. According to the invention, the artificial pollination device replaces labor and sticks a picked male flower to a female flower for pollination, avoids human body movements, saves manpower and material resources, is high in pollination efficiency for female flowers and pollination rate, and the plants pollinated by using the device are high in fruit setting rate; through the adoption of the device, pneumatic spraying is adopted, and the acting force indirectly acts on stigmas, so that the damage to stigmas is effectively avoided, and the fruit aberration rate is reduced.
Owner:WEIFANG YOURONG IND

Method for inducing young elaphe carinata to eat non-living feeds

The invention provides a method for inducing young elaphe carinata to eat non-living feeds, and belongs to the technical field of snake-raising methods. The method comprises the following steps of: 1, hatching elaphe carinata eggs with vermiculites; 2, collecting young elaphe carinata in 4 to 8 hours after hatching, and breeding the young elaphe carinata in a breeding room; 4, from the fourth week, feeding the young elaphe carinata with living suckling mice; 4, on the fourth to sixth day after the young elaphe carinata get feeding for the first time, feeding the young elaphe carinata with the mixture of unfrozen sliced pork and the suckling mice; and 5, feeding the young elaphe carinata with the mixture of the unfrozen sliced pork and the suckling mice every 4 to 6 days, wherein during each feeding, the content of the suckling mouse in the feed gradually decreases, the content of the sliced pork in the feed gradually increases, and the young elaphe carinata is completely fed by sliced pork in one month after the induction begins. The newly hatched young elaphe carinata are induced to actively eat low-price non-living open baits which are easy to process and store and can be added with additives easily by utilizing the imprinting behaviors of animals; in addition, the feeding method is independent of limitation of seasons, easy to operate and low in feeding cost; and the survival rate of young elaphe carinata is high.
Owner:林隆慧

Compound feed for breeding boars and preparation method of compound feed

The invention discloses a compound feed for breeding boars. The compound feed comprises the following components in percentage by weight: 60-66% of corn flour, 3-5% of fish meal, 4-7% of fermented soybean meal, 10-15% of soybean meal, 10-11% of bran, 0.3% of multiple minerals, 0.5% of table salt, 0.04% of multiple vitamins, 0.12% of choline, 1.2% of dicalcium phosphate, 0.02% of phytase, 1.2% of stone powder, 0.12% of lysine, 0.03% of a probiotics compound and 0.5-1.0% of a Chinese herbal medicine compound for producing sperm. The compound feed disclosed by the invention is reasonable in formula design, provides comprehensive balanced nutrition for breeding boars, and creatively provides the Chinese herbal medicine compound for producing sperm, so that difficult problems that the semen quality is reduced and the sexual desire of the boars is poor caused by large sperm collection intensity of the breeding boars are solved; and the Chinese herbal medicine compound for producing sperm has the effects of nourishing the liver, nourishing the kidney, benefitting sperm, replenishing blood, reinforcing the spleen, invigorating the stomach and the like, so that after the breeding boars eat the compound feed, the sexual desire of the breeding boars is strengthened, the sperm viability, the sperm density and the semen volume are obviously improved, and the sperm abnormality rate is obviously reduced.
Owner:广州广力莱生物科技有限公司

Prevention and treatment method of saprolegniasis in incubation period of hucho bleekeri fertilized eggs

The present invention discloses a prevention and treatment method of saprolegniasis in an incubation period of hucho bleekeri fertilized eggs. The method comprises the following steps: from the second day of incubation of the fertilized eggs, the fertilized eggs are soaked using running water containing formaldehyde every day; soaking liquid enters form the bottom of an incubator and is discharged out from the top of the incubator, a flow rate is controlled, so that the fertilized eggs do not roll over due to the excessive flow rate, the operation is continuously conducted for 30 min each time, and in the soaking process, the operation is conducted in dark place without vibration. After 30 min, normal incubation water is used to conduct running water incubation, and in the stages from the development of the fertilized eggs to early incubation (at an average incubation temperature of 7.5 DEG C and an accumulated temperature reaching 127 DEG C-170 DEG C), formaldehyde disinfection is stopped. Artificial methods are used to remove dead eggs until the fertilized eggs come out from membranes. The method is used to conduct the disinfection of the hucho bleekeri fertilized eggs, the incidence of the saprolegniasis can be reduced by 80% or more, and the deformity rate can be reduced to be 3% or below after emergence by using the method,.
Owner:FISHERIES INST SICHUAN ACADEMY OF AGRI SCI

Cultivation method for brachymystax lenok fry

The invention discloses a cultivation method for brachymystax lenok fry. The cultivation method includes the steps of A, artificial incubation; B, fry opening feeding; C, transferring out of an incubation tank for cultivation, and stocking at reasonable density; D, pool dividing domestication, wherein palatable bait is selected, food domestication control is conducted, and meanwhile scientific daily management and disease prevention are conducted. According to the biological characteristics of brachymystax lenok, total artificial regulation is conducted on the aspects of water temperature, illumination, dissolved oxygen and the like, the advantages that the physiques of the fry are healthy, strong and balanced, the bait utilization rate is high, environmental tolerance is high, and disease resistance is high are achieved by means of food intake regulation and standard management, and the fertilized ovum hatching rate of the brachymystax lenok and the growth rate and survival rate of offspring fishes are greatly increased. The offspring fishes are healthy, strong and balanced, high environmental tolerance and disease resistance are achieved, and occurrence of malformation is greatly reduced. The method is simple, high in operability, good in practical applicability and completely suitable for large-scale production of the fry, and is used for species resource protection and natural population restoration of the brachymystax lenok accordingly.
Owner:YANGTZE RIVER FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
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