40results about How to "Increased labor induction rate" patented technology

The invention introduces a method for improving the reproduction rate of giant salamanders, which includes the following steps: (1) building up an artificial natural ecological function culture system, namely, at least one artificial natural ecological function culture pond group, wherein each pond group comprises 2-3 rearing ponds; (2) feeding qualitatively and quantitatively at fixed time, wherein live loaches or crucians are taken as the main feed, fresh shrimps and beef liver or pork liver are added as auxiliaries, furthermore as for male salamanders, testes of cocks or ducks are added, and as for parent salamanders, vitamin C or vitamin E are added before and after the parturition; and (3) regulating and controlling the water temperature, wherein at the temperate range of 17-19 DEG C, the female salamanders and the male salamanders can be enabled to grow up at the same time by rising or lowering the water temperature by 1-2 DEG C. The method can greatly improve the artificial reproduction rate of giant salamanders, with the induced spawning rate of the female salamanders reaching 75% and the male salamanders exceeding 80%. Meanwhile, the method can also improve the fertility rate and the hatching rate by 8-12%.

The invention belongs to the technical field of aquaculture, and particularly relates to a breeding method for increasing the survival rate of loaches manually bred in a factory-like mode, wherein the breeding method is reasonable, simple and high in operability. According to the breeding method, the natural mating method, the sperm extrusion method and the laparotomy spermatophore-obtaining method can be adopted, the death rate of parent fish for breeding can be greatly reduced, and the spawning induction rate, the fertilization rate and the hatching rate can be increased.

The invention discloses a method for batch breeding of loach fry, which notably improves catalytic production rate of the loach. The method comprises the steps of: a, selecting loach parent for breeding to perform prenatal strengthening cultivation; b, building a third-level filtering reservoir device for spawning and hatching; c, selecting composite of the maleic acid domperidone and the trout luteinizing hormone releasing hormone analogue as a catalyst to catalyze male and female loaches, wherein per kilogram of female loaches need 10-15mg of the catalyst; per kilogram of male loaches need 5-7.5mg of the catalyst; enabling the female loaches and the male loaches to spawn and inseminate in a net cage in the jar according to the ratio of the female loaches to the male loaches being 1:2; taking out the loaches, enabling the spawns to continuously hatch; producing loach fry in a large scale; d, feeding the initial feed, putting the loaches to the pond; according to organ development characteristic of the loach fry, controlling diet conversion time point, electing palatable bait, scientifically feeding the bait, and strengthening water quality and disease control and prevention.

The invention discloses a large-scale common sucker breeding method capable of controlling the temperature of circulating water. The method comprises the following steps of parent fish selection, parent fish rearing, artificial spawning induction, artificial fertilization, artificial incubation, larva fish cultivation, disease control and the like. In an artificial breeding process, the temperature of the water is controlled in a range of 15-20 DEG C by using a circulating water temperature controlling technology, the water is circulated and is used efficiently, the prosperous breeding period of common suckers is greatly prolonged, adverse effects on artificial breeding due to over low water temperature in the early stage and over high water temperature in the later stage are avoided, and the problems that the water quantity is insufficient, the water quality is deteriorated and the water is polluted in the breeding period are solved. According to the technical scheme obtained from scientific experimental research and production practice, the spawning induction rate, the spawning rate, the fertility rate, the hatching rate and the emergence rate of the common suckers can be greatly improved, the bottleneck on large-scale breeding of the common suckers is solved, and the large-scale common sucker breeding method plays an important role in scientific research, population protection and artificial breeding of the common suckers.

The invention provides a hybrid carp and pengze crucian carp hybrid breeding method and belongs to the technical field of freshwater fish hybrid breeding. The hybrid carp and pengze crucian carp hybrid breeding method aims at solving the problem that no proper hybrid method exists in the prior art to prevent carp diseases in the northern area. The method includes the steps that a first filial generation is obtained by regarding a German mirror carp as a female parent and a jian carp as a male parent for hybridization, an irregular male carp with the high growth speed and a few large body surface scales serves as a male parent, a batch of plump female pengze crucian carps with more than 31 lateral line scales and high growth speed are optimized out through two-generation breeding to serve as a female parent, parent mature promotion and artificial propagation are carried out on the basis of optimizing and directive breeding of hybrid parents, hybrid carps coincident with the pengze crucian carp female parent in appearance can be obtained after distant hybridization is carried out, hybrid generation has no carp characters, and the hybrid carp and pengze crucian carp hybrid breeding method has the advantages of being high in growth speed and disease resistance, and is of great significance in improving unit yield, increasing breeding benefits, breeding new species and achieving large-scale fry rearing.

The invention relates to the technical field of aquaculture, in particular to an artificial breeding method for acipenser dabryanus. Oxytocin is injected into female acipenser dabryanus two times, wherein the interval between two times of injection is 12 hours, and the injection amount of the first time accounts for 1/3 to 1/2 of the total dose. The one-time injection method is adopted for male acipenser dabryanus, wherein injection of the male acipenser dabryanus is synchronous with the first time of injection of the female acipenser dabryanus, and the dose of the male acipenser dabryanus is half that of the female acipenser dabryanus. Fertilization is conducted according to a half-dry method, water, eggs and seminal fluid are mixed according to the proportion of 75:50:1, and the mixture is stirred for 2 minutes to 3 minutes. A complete acipenser dabryanus artificial breeding technique process is provided, and technical support is provided for large-scale artificial breeding; due to the adoption of the method, the hatchability of acipenser dabryanus can reach 85% or higher at most, and restrict factors in the acipenser dabryanus artificial breeding process are eliminated.

The invention discloses an artificial propagation method for coreius guichenoti. The method includes the steps of 1, selection of parent fishes, wherein parent fishes the gonads of which are high in development maturity are selected to serve as spawning acceleration parent fishes according to external features of the parent fishes of coreius guichenoti and the eggs dug out by an egg digging device; 2, preparation and injection of spawning acceleration drugs, wherein according to the weight of the fish bodies, normal saline is adopted for preparing the spawning acceleration drugs such as lutropin releasing hormone A3, gonadotropin of fish pituitary glands and chorionic gonadotropin, a two-time injection method is adopted for injection, the water temperature is 20.5-22 DEG C, and the needlepitch is 8-10 h; 3, artificial propagation acceleration and insemination, wherein the parent fishes are checked at irregular time after injection of the spawning acceleration drugs, artificial insemination is carried out once the phenomena of ovulation and spermiation occur, and a wet insemination method is adopted as the insemination method; 4, hatching, wherein the obtained fertilized eggs are poured into a conical hatching device for hatching, and after fry get out of membranes, the fry are moved into a fry cultivation box for fry cultivation. The operation is simple, the artificial propagation rate and the survival rate of the fry are effectively increased to 85% or above, and a solid base is laid for propagation, releasing and protection of coreius guichenoti group sources.

The invention discloses a total artificial propagation method of opsariichthys bidens. According to the method, parent fish is selected from first-generation and second-generation artificially cultivated groups of wild opsariichthys bidens subjected to artificial domestication and breeding, artificial cultivation is performed until opsariichthys bidens gonad develops maturely, and therefore the parent fish individuals have good maturation synchronism, and the maturation rate is higher; then hormone HCG is used for spawning induction, the spawning induction effect is good, and the spawning induction rate is high; physiological saline is used for activating spermatozoa during artificial insemination, the fertilization effect is improved, and the fertilization rate is higher; and fertilized eggs are put in an incubation frame in an incubation device, hatching is carried out under temperature control conditions, and therefore the hatching effect is improved and a high hatching rate is achieved. According to the method of the present invention, improvement and innovation are carried out on the prior art to realize the full artificial propagation of the opsariichthys bidens. The method focuses on technical links and refinement of technical parameters so as to facilitate popularization and use. The technical method of the present invention is verified by multiple production, and the operability and practicality are high.

The invention provides a method for d domesticating wild Leptobotia elongata under artificial cultivation conditions until the gonadal maturation of the Leptobotia elongata. The method includes: building an ecology-simulated pond to simulate the habitat of the wild Leptobotia elongata; subjecting the collected Leptobotia elongata to soaking and sterilizing, and performing isolated temporary cultivation; domesticating the Leptobotia elongata after the temporary cultivation in the ecology-simulated pond; feeding the Leptobotia elongata with prepared parent Leptobotia elongata feed; strengtheningbefore reproduction, to be more specific, three months before the reproduction of the Leptobotia elongata, injecting carp hypophysis cerebri grinding liquid once each month; two months before the reproduction, increasing the flow speed of the ecology-simulated pond, and increasing the water temperature to 25-26 DEG C to stimulate the gonadal maturation of the parent Leptobotia elongata. The method has the advantages that the habitat, water flow and food of the wild Leptobotia elongata are simulated, the nutrition proportion of the parent Leptobotia elongata feed is regulated, the strengthening before reproduction is performed, gonadal maturation rate can reach above 50%, and spawning induction rate during large-scale artificial reproduction is increased.

The invention relates to the field of beluga culture, particularly discloses a beluga artificial propagation method and application of a carp pituitary gland, and relates to a beluga artificial propagation method. The method comprises the steps that 1, nutrient enrichment culture is performed on a beluga milter parent and a beluga raun parent; 2, the beluga milter parent and the beluga raun parent obtained after nutrient enrichment culture are subjected to low temperature stimulation; 3, the water temperature is increased to the pre-spawning induction temperature, and spawning induction medicine administration is performed on the beluga milter parent and the beluga raun parent so as to be subjected to spawning induction; 4, free eggs and seminal fluid are collected to be subjected to artificial fertilization and incubation, wherein the spawning induction medicine is the carp pituitary gland. The invention further relates to application of the carp pituitary gland for beluga artificial propagation, and application of the carp pituitary gland for preparing medicine for artificial propagation of beluga. The beluga spawning induction medicine is easy to obtain and prepare, the spawning induction rate of spawning induction propagation performed by adopting the beluga spawning induction medicine is high, the fertilization incubation effect is good, and the postpartum parent fish survival condition is good.

The invention provides a method for artificial inducing spawning of trachinotus ovatus. The method comprises the following steps: (1) a parent fish is selected, (2) inducing spawning intensified breeding of the parent fish is performed, wherein a water temperature is increased by 0.3-0.5 DEG C every 2-3 days; every 3-5 days, compound seawater is used to replace 6-10% of pool water; a fortified bait is fed 3-4 times each day; and the light is extended for 10-15 min every two days; (3) temperature-controlled injection of oxytocin is performed 3 times for artificial inducing spawning; and after 3times of the temperature-controlled oxytocin injection, a water flow rate is adjusted to 0.8-1.4 m<3>/s, and a light period is prolonged to 15 L/9 D-16 L/8 D; and (4) artificial insemination and hatching are performed. In the method, the parent fish is subjected to inducing spawning intensified breeding, and a manner of 3 times of temperature-controlled injection inducing spawning is used, so that the parent fish is subjected to inducing spawning under different water temperature environments, and the water flow rate and light period after injecting oxytocin are increased, so that the parentfish inducing spawning effect is effectively improved, the effect time is shortened, and a fertilization rate and a hatching rate are high.

The invention discloses an artificial breeding method of spiny eels. The artificial breeding method includes: at the peak stage of breeding each year, namely a period from the middle of May to the beginning of July and September, selecting parental fishes whose sexual maturity is high from the spiny eels which are captured outdoors or domesticated, where female-male ratio is 1:1.2; injecting artificial induced spawning drug into the parental fishes, taking semen of male fishes and eggs of female fishes for artificial insemination, using brine shrimp nauplius for mouth opening after hatching, using Tubificidae to feed for one month, and starting to use mixed feed for domestication when the spiny eels grow to about 3 cm. The artificial breeding method has the advantages of high induced spawning rate, high fertilization rate, high hatching rate, high survival rate, low parent death rate, suitability for large-scale fingerling breeding according to needs, high efficiency, simplicity, convenience and conduciveness to popularization.

The invention discloses an artificial spawning induction method for Trochus pyramis born. The method comprises the steps that (1) Trochus pyramis born parent cowries were put in a breeding pool with culture of benthic diatom for maturity acceleration breeding, the cowries are put into normal-temperature seawater when the water temperature in the breeding pool reaches 25 DEG C or above, and the water temperature is increased gradually through sun exposure and continuous air inflation; and (2) the seawater exposed to sunlight is discharged and replaced by fresh filtered seawater, the water temperature is recovered to the normal temperature, air is inflated indoors and spawning waiting is conducted. The method disclosed by the invention is characterized in that natural temperature differences are utilized; sunlight exposure takes the place of dedicated ultraviolet ray generators and temperature rise devices; an ultraviolet ray induction method and a temperature variation induction method are integrated to induce sperm egg discharge of Trochus pyramis born. The spawning induction method disclosed by the invention has the advantages that the spawning induction rate reaches up to 89%; and the fertility rate reaches up to 100%. The method disclosed by the invention has the advantages that no influences are brought to creatures and environments; and the method is safe, reliable, efficiency and easy in operations.

The invention belongs to the technical field of aquaculture, and relates to an efficient artificial spawning induction method for cynoglossus semilaevis female fish. According to the method, efficientartificial spawning induction of cynoglossus semilaevis female parent fish is achieved through selection of the female parent fish, control over spawning induction pond culture conditions, artificialspawning induction, artificial insemination and incubation. By the adoption of the method, the spawning induction rate, the relative spawning amount, the fertilization rate and the hatching rate of the cynoglossus semilaevis female fish are greatly increased, and the method is an extremely efficient artificial spawning induction method. The method provided by the invention has very good practicability and operability, and is beneficial to further rapid development of the cynoglossus semilaevis culture industry.