45results about How to "Increase fecundity" patented technology

The invention relates to a granular feed for megalobrama amblycephala parent fish and a preparation method thereof. The granular feed for parent fish comprises the following raw material components: fish meal, squid meal, bean pulp, rapeseed meal, cottonseed meal, common flour, wheat middling, washed rice bran, fish oil, linseed oil, vitamin additive, mineral substance additive, monocalcium phosphate, 50% choline chloride, zeolite powder, granulesten powder, 50% vitamin E and potassium sorbate mildewproof agent. The preparation method comprises the following steps: coarsely smashing fish meal, the squid meal, the bean pulp, the rapeseed meal, the cottonseed meal, the common flour, the wheat middling, the rice peel and the potassium sorbate mildewproof agent into mixed coarse material, andscreening by a screen of 10-20 meshes; then, stirring and comptely mixing the mixed coarse material, fish oil, the linseed oil, the granulesten powder, 50% vitamin E, premix for fish, the vitamin E, the zeolite powder and the monocalcium phosphate to obtain mixed material; finely smashing the mixed material and screening by a screen of 40-60 meshes; and finally, pelletizing, drying, cooling and packaging. The granular feed has the functions of improving the reproductive capacity and disease-resistant capability of the megalobrama amblycephala parent fish.

Disclosed is a kind of pelletized feed for java tilapia clean fish whose constituents includes effective dose of animal meat meal, animal oil, material of vegetable origin, yeast powder, mixed vitamins, mixed minerals, garlicin and liquemine. The preparation process comprises the steps of, (1) weighing the coarse raw material by a predetermined proportion and disintegrating, (2) weighing other raw material by a predetermined proportion, mixing with the raw material of step (1), mixing sufficiently with a blender, (3) tableting the mixture of step (2) through steam tableting system, drying the pelletized feed in a refrigerator, gumming with grading sieves, finally inspecting and packaging.

A new protein supplement for insect rearing contains extracts of insect eggs or cultured insect egg embryonic cell lines from insects such as Plodia interpunctella and Ephestia kuehniella Zeller, etc., to increase the fecundity of insects reared for biocontrol.

The invention discloses a feed for promoting maturation of parent sea cucumber of stichopus japonicus, comprising the following raw materials in weight percentage: 60%-70% of see mud, 17%-23% of fresh algae extract, 3%-5% of yolk powder, 1.5%-2.5% of fish meal, 0.4%-0.8% of yeast, 0.15%-0.25% of shell powder, 0.25%-0.4% of sodium alga acid, 0.25%-0.4% of immune polysaccharide of Chinese herbal medicine and 0.1%-0.2% of complex vitamin. The feed has comprehensive nutrition and can meet the personal growth requirement of the stichopus japonicus through the mutual fit of the raw materials. Compared with stichopus japonicus fed with the traditional feed, the feed can shorten the maturation-promoting time of the parent sea cucumber, increase the personal brood amount, improve the quality of ova and raise the survival rate of stichopus japonicus seedlings.

The invention relates to an artificial tilapia mossambica breeding technology which comprises the following steps: clearing and disinfecting a fishpond; cultivating the water quality by using organic fertilizers; putting high-quality parent fish in a certain male-female proportion; controlling the water temperature in the breeding pond and promoting the female fish to lay eggs; adjusting the water temperature to promote the natural incubation and produce fry; taking out the fry and putting in a pond with better water quality for breeding; and putting plant and animal baits through a mixed breeding manner to promote the growth. According to the artificial tilapia mossambica breeding technology, the output and the benefit of the tilapia mossambica can be effectively improved and the development of the tilapia mossambica breeding industry can be pushed.

The invention discloses a rabbitfish siganus oramin artificial propagation method. The method compriss the steps of parent fish rearing, parent fish maturity observation, artificial spawning, artificial insemination and germ cell incubation. According to the method, 1-2-months ahead of the schedule, parent rabbitfish siganus oramin is picked up from a seaborne deepwater net cage, the rabbitfish siganus oramin is put in an indoor cement pit to be cultured, running water and illumination are controlled, the shielded environment is provided, nutrient enrichment is assisted, egg maturation is promoted, the brood amount is increased, artificial injection and parturition hastening are adopted, close observation is performed after parturition hastening, the parent fish gonad maturity is inspectedregularly, after it is determined that sperms and eggs are mature enough, the dry method insemination method is adopted for artificial insemination, germ cells are incubated through an incubation barrel, the problems that due to the fact that in a traditional rabbitfish siganus oramin propagation method, parent fish spawning and spermiation are not synchronous and germ cells are stuck, death is caused due to lack of oxygen are solved, and the method has the advantages that the manual control degree of technological links is high, the production practicability is high, the cultured parent fishbrood amount is large, the germ cell quality is good, and the hatching rate is high.

The invention discloses a fish feed which is characterized by consisting of chicken manure, mushroom bran, fish meal, fish oil, soybean meal and a binder, wherein the chicken manure and the mushroom bran are fermented and are uniformly mixed with other materials, so that the granular feed is prepared. The fish feed disclosed by the invention is balanced in the content of such materials as protein, fat, sugars, trace elements and the like and the materials can be reasonably proportioned according to nutrients required by different varieties and in different periods growth and development; the fish feed is better in absorption after being eaten by fish and shrimp, and is capable of promoting the rapid growth of the fish, improving digestibility, reducing the load of the digestive system and reducing the occurrence of digestive diseases; and the fish feed disclosed by the invention is low in food coefficient and low in preparation cost.

The invention relates to manual compound feed for a parent sea cucumber, as well as a manufacturing method and a using method of the feed. The compound feed comprises components of raw materials in parts by mass as follows: 20-30 parts of sargassum thunbergii, 20-30 parts of sargassum, 10-20 parts of white fish meal, 10-20 parts of scallop skirt powder, 5-10 parts of fermented bean meal, 1.0-2.0 parts of fish oil, 2.0-3.0 parts of spirulina, 0.5 part of compound vitamin, 0.5 part of a compound trace element, 1-2 parts of lecithin and 0.005-0.01 part of vitamin E. The manual compound feed for the parent sea cucumber contains enough nutrient substances required by growth and development of a parent sea cucumber during the conservation period, and obviously strengthens special nutrient substances such as lecithin, vitamin E and the like, which are required by development of gonad and sexual cells; not only can the weight gain rate of the parent sea cucumber be improved by over 10%, but also the fish brood amount of the parent sea cucumber can be increased; and the hatching rate of eggs laid by the parent sea cucumber fed by the feed is increased by over 15%, the survival rate of a larva is improved by 20%, and the manual compound feed for the parent sea cucumber is special and efficient.

The invention relates to environment-friendly compound feeds capable of improving the fertility of sciaenops ocellatus parent fish. The compound feeds are characterized in that the compound feeds consist of a basic feed component and a Chinese herbal medicinal additive, wherein the weight part ratio of the basic feed component to the Chinese herbal medicinal additive is (99.5-99.9):(0.1-0.5); the basic feed component consists of the following raw materials in parts by weight: 20 to 40 parts of fish meal, 10 to 30 parts of soybean meal, 5 to 15 parts of peanut meal, 4 to 10 parts of chicken meal, 10 to 30 parts of strong flour, 5 to 15 parts of beer yeast, 3 to 10 parts of squid paste, 1 to 5 parts of phospholipid oil, 1 to 5 parts of fish oil, 0.2 to 0.5 part of decavitamin, 0.5 to 1.5 parts of complex mineral, 0.3 to 1.0 part of a feed attractant, 0.1 to 0.3 part of L-ascorbate-2-phosphate, 1 to 3 parts of calcium dihydrogenphosphate, 0.01 to 0.05 part of a mildew-proof agent, 0.2 to 0.8 part of Te Mianwang, 0.1 to 0.3 part of salt, 0.05 to 0.15 part of choline chloride and 0.01 to 0.03 part of vitamin E. The feeds are nutritional and environment-friendly, the sexual maturity time of the sciaenops ocellatus parent fish can be shortened, the gonad development of the sciaenops ocellatus parent fish can be promoted, and the fertility of the sciaenops ocellatus parent fish can be improved.

The invention relates to a method for reproducing adult ptyas korros. The breeding and management method comprises the following steps of 1, planting lotuses each having 3-4 interior leaves in an artificial pond according to a space of 15*18cm; 2, selecting adult ptyas korros having smooth skin in May-July, and putting the ptyas korros in a breeding house with a proportion of male to female being 1 to 2, wherein the volume of the breeding house is 6 times that of the adult ptyas korros in the breeding house; and fixing the breeding house in the artificial pond, wherein one breeding house is fixed in the artificial pond per square meter; 3, keeping the breeding house at a temperature of 23 DEG C and a humidity of 30 percent; and 4, throwing feed for three times everyday. The method for promoting reproduction of adult ptyas korros can be used for improving the reproduction capability and spawning quality of the ptyas korros.

The invention discloses feed for sturgeon parent fish as well as a preparation method thereof. The feed is prepared from the following components in percentage by mass: 10 to 50 percent of fish meal,5 to 15 percent of chicken meat powder, 3 to 10 percent of egg powder, 1 to 5 percent of beer yeast powder, 5 to 30 percent of wet brine shrimps, 5 to 10 percent of conch meat, 5 to 10 percent of mussel meat, 5 to 10 percent of oysters, 8 to 25 percent of fermented soybean meal, 8 to 20 percent of flour, 1 to 4 percent of fish oil, 0.5 to 1 percent of soya lecithin powder, 1 to 5 percent of kelp powder, 0.2 to 1 percent of vitamin mixture, 1 to 5 percent of casein protein, 3 to 5 percent of antarctic krill, 1 to 4 percent of mineral element mixture, 1 to 5 percent of microbial agents, 1 to 5 percent of EPA, 1 to 5 percent of DHA, 1 to 5 percent of ARA, 1 to 5 percent of carotene, and 1 to 2 percent of feed attractant. According to the feed for the sturgeon parent fish, disclosed by the invention, a gonadal development condition of the sturgeon parent fish can be improved, a brood amount of sturgeon fish gonad is increased, the color of fish eggs is turned from common black into shallowcolor with a higher value amount, and even turned into scarce golden yellow fish eggs through the physiological metabolism so as to obtain excellent-quality sturgeon fish caviar; meanwhile, a survival ratio can be increased, a feed conversion ratio is increased and a specific growth ratio is increased.

The invention discloses a breeding method for parabotia fasciata dabry fry, and relates to the field of fry breeding. The method includes the steps of breeding parent parabotia fasciata dabry in a breeding pool provided with a water quality purification breeding system, breeding parent parabotia fasciata dabry through parent breeding and managing, obtaining female parent parabotia fasciata dabry and male parent parabotia fasciata dabry, obtaining parabotia fasciata dabry fertilized eggs after conducting spawning induction and insemination on the obtained female parent parabotia fasciata dabry and male parent parabotia fasciata dabry, and obtaining parabotia fasciata dabry fry after the obtained parabotia fasciata dabry fertilized eggs are hatched in a hatching tank for 22-26 hours. Parent parabotia fasciata dabry bred through the method is high in gonad maturing rate, neat in maturity and good in seminal fluid quality, parent parabotia fasciata dabry artificially spawned is neat in egg laying time, high in fertilization rate, high in fertilized egg hatching rate and good in bred fry quality.

The invention discloses a parent fish rearing method for gymnocypris potanini. The method comprises the steps that A, standby parent fishes are selected, wherein fishes without surface wounds are selected as the standby parent fishes; B, the parent fishes are put, wherein the parent fishes are put in breeding buckets, and the breeding buckets are disinfected with potassium permanganate; C, temporary rearing is carried out, wherein wild standby parent fishes are put in the buckets and are not fed; D, eating training is carried out, wherein water earthworms and feed special for salmon and bulltrout are mixed to be uniform for eating training; E, breeding is carried out, wherein fishes fished in anestrous seasons are bred; F, the parent fishes are selected, wherein before the anestrous seasons, the developed parent fishes are selected for gonad reinforcement breeding, and feed, water flow and male and female mixed culture are included; G, artificial reproduction is carried out, wherein the parent fishes stops being fed before artificial reproduction is carried out, the parent fishes are fished out, and the female fishes developed well are selected for artificial reproduction. The method is easy to implement and easy and convenient to operate, the parent fishes which are mature, large in brood amount, high in reproduction capacity and high in sperm and egg quality are obtained, and synchronous development of the male parent fishes and the female parent fishes is achieved.

The invention relates to a finless eel liver protecting agent and a preparation method thereof, and belongs to the field of a feed additive for aquatic products. Each 100 parts of the finless eel liver protecting agent consists of the following raw materials in parts by weight of 10-14 parts of argy wormwood leaf powder, 8-12 parts of an artemisia selengensis leaf extract, 7-11 parts of refined duckweed powder, 12-16 parts of fermented algae powder, 4-6 parts of earthworm powder and the balance of a carrier, wherein the carrier comprises wheat flour and diatom powder in the mass ratio of the wheat flour to the diatom powder being 1 to (1-2). When the finless eel liver protecting agent is added to a finless eel ration, the fat metabolism in organisms of finless eels can be effectively promoted, storage amount of fat in livers can be reduced, besides, the finless eel liver protecting agent can prevent and treat liver injury caused by diseases, can also promote digestion and absorption ofration nutrient substances, and can increase the survival rate and the growth rate of finless eels.

The invention discloses a cultivation induction method for parent misgurnus anguillicaudatus and relates to the field of aquaculture. The method comprises the following steps: treating pond water in a cultivation pond by using a traditional Chinese medicine composition; putting the bred parent misgurnus anguillicaudatus into the cultivation pond, and cultivating the parent misgurnus anguillicaudatus with self-made feeds, wherein animal proteins and plant proteins account for 50 percent respectively, the content of the proteins is 35 percent, and the content of fat is 5 percent; feeding the parent misgurnus anguillicaudatus for two times every day, wherein the feeding amount is 3-5 percent of the body weight of the parent misgurnus anguillicaudatus, water is yellow green and keeps rich and clear, the transparency is 15-20 cm, and the water temperature is 15-25 DEG C; washing for two times every week, changing a quarter of pond water at each time, dissecting regularly to check gonad development, timely adjusting a work plan, and preventing the putrid-skin disease, the edema disease, the trichodiniasis, the chilodonelliasis and the bird damage of misgurnus anguillicaudatus. According to the cultivation induction method for the parent misgurnus anguillicaudatus provided by the invention, by virtue of breeding and strengthened cultivation, the physical health of the parent misgurnus anguillicaudatus is improved, the brood amount is large, and the spawning induction fertilization rate is high. Moreover, the pond water in the cultivation pond is treated by using the traditional Chinese medicine composition, germs and parasites in a water body are killed, the traditional Chinese medicine composition can promote the misgurnus anguillicaudatus to forage, and the aim of cultivation induction is achieved.

The invention discloses a preparation method and application of a carp spermary bioreactor. The preparation method comprises the following steps: A, screening a promoter overexpressing gene in a seminal fluid; B, constructing a target gene expression vector specifically expressed in fish spermary; C, introducing a recombinant gene segment into a red carp oosperm to stably ingrate the recombinant gene segment in genome; and D, letting the target gene efficiency expresse in the transgenic red carp spermary to obtain a bioreactor highly expressing the target gent. According to the invention, by utilizing the property of fish spermary gene specific expression, the bioreactor with safety, high efficiency, and sustainable utilization can be constructed; simultaneously fish have the characteristics of fast speed of enlarging quantity and low breeding cost, thus large-scale low-cost operation of the bioreactor can be realized.

The invention relates to an artificial propagation technology of rana chensinensis david. The artificial propagation technology comprises the following steps of selecting 3-4a wood frogs as frog parents, collecting the frog parents into an egg laying pond of an artificial propagation farm to lay eggs, and performing massive propagation by a natural incubation method; according to the actual conditions, determining the culture density of tadpoles in the propagation pond, feeding plant and animal feeds at fixed time and fixed amount, completely transforming in a transformation pool into young frogs, and then performing forest propagation. By adopting the method, the artificial propagation technology has the advantages that a large amount of young frogs with high resistivity and immunity can be propagated, the yield and benefits of wood frogs are greatly improved, and the development of rana chensinensis david propagation industry is promoted.

The invention discloses a method for cultivating artificially reproduced parent fish of sturgeon. According to the method, preparative parent fish is screened systematically and purposefully in multiple stages from advanced fry to form a stable parent fish preparative population, the number of the preparative fish to be raised as parent fish can be guaranteed, the number of egg-laying population can be increased, and the whole fertility can be improved; the parent fish population is further optimized by selecting and raising the parent fish, the parent fish is subjected to enhanced raising indifferent tanks after sex of the parent fish is mature, the parent fish has excellent gonad development by adjusting the water temperature and nutrition for raising, and fertilized eggs with excellentquality can be obtained. Parent sturgeon is carefully raised after delivery, so that the casualty rate of delivered parent sturgeon is reduced, and the limited parent sturgeon resource is protected.Therefore, the brood amount and induced spawning rate of sturgeon can be improved, and high-quality artificial reproduced parent population with high reproductivity capacity can be formed; and the fertility rate and hatching rate can be guaranteed, the fry seeds have high survival rate, and the development of artificial sturgeon raising industry in China can be favored.

The invention discloses a breeding method for parent misgurnus anguillicaudatus and relates to the field of aquaculture. The method comprises the following steps: selecting the parent misgurnus anguillicaudatus from a last-year artificial cultivation pond, wherein female misgurnus anguillicaudatus is over 3 years old, male misgurnus anguillicaudatus is over two years old, the body length of the misgurnus anguillicaudatus is 15-20 cm, the average body weight is over 12 g, the quantity ratio of the female misgurnus anguillicaudatus to the male misgurnus anguillicaudatus is 1:(2-3), the area of a parent misgurnus anguillicaudatus cultivation pond is 0.17 hectare, the water depth is 50-60 cm, and the depth of soft sapropel at the bottom of the pond is 15 cm; arranging an anti-escaping net at a water inlet / outlet, wherein water is required to be clear and pollution-free, the released density is 25 misgurnus anguillicaudatus per square meter, and the putting volume is 37.50 kg / hectare; before the parent misgurnus anguillicaudatus is put into the cultivation pond, treating pond water by using a traditional Chinese medicine composition. According to the breeding method for the parent misgurnus anguillicaudatus provided by the invention, by virtue of breeding and strengthened cultivation, the physical health of the parent misgurnus anguillicaudatus is improved, the brood amount is large, and the spawning induction fertilization rate is high. Moreover, the pond water in the cultivation pond is treated by using the traditional Chinese medicine composition, germs and parasites in a water body are killed, the traditional Chinese medicine composition can promote the misgurnus anguillicaudatus to forage, and the aim of cultivation induction is achieved.

The invention relates to a method for large-scale cultivation of Chinese forest frogs, comprising the following contents: selecting 3-4a raw forest frogs as seed frogs, collecting the seed frogs to lay eggs in artificial breeding ground spawning pools, and carrying out a large number of species by natural hatching method Breeding: Determine the stocking density of tadpoles in the breeding pond according to the actual situation, regularly and quantitatively feed vegetable and animal feed, and enter the forest to breed after the metamorphosis pond completely metamorphoses into young frogs. Through this method, a large number of young frogs with high resistance and immunity can be cultivated, the yield and benefit of the forest frog can be effectively improved, and the development of the breeding industry of the forest frog in China can be promoted.

The invention provides a flower and lip hybrid F1 generation seedling propagation method. The method includes that parent fish mature rate is up to higher than 75% by taking flower as a female parentand lip as a male parent and controlling parameter conditions during breeding, spawning induction and incubation, maturing time is orderly, brood amount is high, semen quality is high, parent fish egglaying time is uniform, and each of fertilization rate and incubation rate reaches higher than 90%. The method can be used for in-pond artificial seedling culture of hybrid F1 generation and is of important guiding significance in large-scale artificial breeding of F1 generation and comprehensive planting and breeding in a rice field.

The invention discloses a nutrient enrichment feed for parent clam worms and a preparation method thereof. The nutrient enrichment feed is prepared from the following components: 25-35 parts of white fish meal, 15-30 parts of bean pulp, 10-15 parts of high protein flour, 5-15 parts of alpha-starch, 2-5 parts of scallop powder, 2-5 parts of squid liver powder, 2-5 parts of shrimp shell powder, 2-5 parts of beer yeast, 3-5 parts of compound nutrient supplements, 3-5 parts of clam worms, 3-5 parts of fish oil, 1-2 parts of soya bean lecithin, 1-2 parts of complex mineral salt, 0.5-1 part of decavitamin, 0.2-0.5 part of probiotics and 0.05-0.1 part of ethoxy quinoline. The preparation method comprises the steps of crushing, mixing, modulating, curing, swelling, granulating, and drying. The nutrient enrichment feed is high in protein and fat content, and reasonable in raw material component compatibility; nutritional ingredients of the nutrient enrichment feed can meet the requirement of growth and propagation of parent clam worms, the stability is good, the quality of ova is improved, the brood amount and the hatchability of clam worms and the survival rate of offspring seeds are increased, the soaking resisting time of the nutrient enrichment feed in water is long, the dissolve-loss ratio is low, the preparation method and process are simple, the large-scale production is easily realized, and the growth and propagation efficiency of parent clam worms can be remarkably improved.

The invention relates to a method for perinereis aibuhitensis heteronereis cultivation and synchronous collection and belongs to the technical field of aquaculture offspring seed breeding. The method is characterized by mainly comprising the steps of cultivation pool design, homo-nereis selection, breeding methods and management and heteronereis synchronous collection. Heteronereis cultivated by the method can all reach over 2.0g, not only is the brood amount improved, but also gametal quality is improved to a certain extent; simultaneously synchronous collection of the perinereis aibuhitensis heteronereis is achieved, the problem that part of heteronereis discharge sperm and lay eggs is solved, collection at night is replaced with collection in the daytie, and not only is heteronereis collection operation convenient, but also offspring seed breeding after the heteronereis collection operation is also greatly facilitated.

The invention relates to an artificial propagation method of West Asian loach, which comprises the steps of clearing and disinfecting a spawning pond, placing a nest, controlling water temperature and injecting hormone to stimulate spawning of parent loach, naturally incubating a spawn, controlling the density of young loach, performing reasonable feeding, and then transferring to an adult loach feeding stage when the loach grows to be about 3cm. The propagation method can effectively increase the yield of the young loach, increases an economic benefit, and promotes development of the loach propagation industry.

The invention discloses a preparation method and application of a carp spermary bioreactor. The preparation method comprises the following steps: A, screening a promoter overexpressing gene in a seminal fluid; B, constructing a target gene expression vector specifically expressed in fish spermary; C, introducing a recombinant gene segment into a red carp oosperm to stably ingrate the recombinant gene segment in genome; and D, letting the target gene efficiency expresse in the transgenic red carp spermary to obtain a bioreactor highly expressing the target gent. According to the invention, by utilizing the property of fish spermary gene specific expression, the bioreactor with safety, high efficiency, and sustainable utilization can be constructed; simultaneously fish have the characteristics of fast speed of enlarging quantity and low breeding cost, thus large-scale low-cost operation of the bioreactor can be realized.

The invention relates to manual compound feed for a parent sea cucumber, as well as a manufacturing method and a using method of the feed. The compound feed comprises components of raw materials in parts by mass as follows: 20-30 parts of sargassum thunbergii, 20-30 parts of sargassum, 10-20 parts of white fish meal, 10-20 parts of scallop skirt powder, 5-10 parts of fermented bean meal, 1.0-2.0 parts of fish oil, 2.0-3.0 parts of spirulina, 0.5 part of compound vitamin, 0.5 part of a compound trace element, 1-2 parts of lecithin and 0.005-0.01 part of vitamin E. The manual compound feed for the parent sea cucumber contains enough nutrient substances required by growth and development of a parent sea cucumber during the conservation period, and obviously strengthens special nutrient substances such as lecithin, vitamin E and the like, which are required by development of gonad and sexual cells; not only can the weight gain rate of the parent sea cucumber be improved by over 10%, but also the fish brood amount of the parent sea cucumber can be increased; and the hatching rate of eggs laid by the parent sea cucumber fed by the feed is increased by over 15%, the survival rate of a larva is improved by 20%, and the manual compound feed for the parent sea cucumber is special and efficient.

Provided is a bionic breeding method of giant salamanders. The method comprises the steps of building of a bionic environment of the giant salamanders, selection and cultivation of parents, artificial spawning, artificial insemination, artificial incubation and seedling cultivation. The bionic environment of the giant salamanders is built according to the factors, such as ground and climate, river impact factors, cave environment factors and water environment factors, of the natural habitat ecological environment of the giant salamanders, a giant salamander habitat environment factor model is built, a bionic gulley and cave optimal construction parameter system is built according to the model, the optimal survival space of the giant salamanders is determined, the survival environment selection of the giant salamanders is carried out selectively, the giant salamanders return to the original, natural breeding and bait contrast experiments are carried out, a reasonable bait scheme and a needed optimal trophic structure of the bionic breeding of the giant salamanders are determined, the quality of sperms of the parents of giant male salamanders can be improved, and the brood amount of the giant female salamanders is increased.

The invention relates to a granular feed for megalobrama amblycephala parent fish and a preparation method thereof. The granular feed for parent fish comprises the following raw material components: fish meal, squid meal, bean pulp, rapeseed meal, cottonseed meal, common flour, wheat middling, washed rice bran, fish oil, linseed oil, vitamin additive, mineral substance additive, monocalcium phosphate, 50% choline chloride, zeolite powder, granulesten powder, 50% vitamin E and potassium sorbate mildewproof agent. The preparation method comprises the following steps: coarsely smashing fish meal, the squid meal, the bean pulp, the rapeseed meal, the cottonseed meal, the common flour, the wheat middling, the rice peel and the potassium sorbate mildewproof agent into mixed coarse material, andscreening by a screen of 10-20 meshes; then, stirring and comptely mixing the mixed coarse material, fish oil, the linseed oil, the granulesten powder, 50% vitamin E, premix for fish, the vitamin E, the zeolite powder and the monocalcium phosphate to obtain mixed material; finely smashing the mixed material and screening by a screen of 40-60 meshes; and finally, pelletizing, drying, cooling and packaging. The granular feed has the functions of improving the reproductive capacity and disease-resistant capability of the megalobrama amblycephala parent fish.