CN112913731A

CN112913731A - Goldfish breeding method

Info

Publication number: CN112913731A
Application number: CN202110280296.7A
Authority: CN
Inventors: 李荣妮; 张欣; 田仲; 王赛赛; 孙砚胜; 朱莉飞
Original assignee: Beijing Fisheries Research Institute (national Engineering Research Center For Freshwater Fisheries)
Current assignee: Beijing Fisheries Research Institute (national Engineering Research Center For Freshwater Fisheries); Beijing Fisheries Research Institute
Priority date: 2021-03-16
Filing date: 2021-03-16
Publication date: 2021-06-08

Abstract

The invention relates to the technical field of aquatic product breeding, in particular to a goldfish breeding method, which comprises the following steps of carrying out artificial insemination on parent fishes in natural estrus: firstly, lightly putting the female fish into a breeding container with prepared water, lightly holding the female fish in the water, and lightly stroking the abdomen of the female fish from the front end of the ovary at the pectoral fin backwards to ensure that mature eggs flow out of the reproductive hole and are uniformly distributed at the bottom of the container; stimulating the male fish to discharge sperms by the same method, and fully contacting the male fish with the eggs for fertilization, so that the eggs are fertilized within 1 minute after the fish body is ionized by the eggs to obtain fertilized eggs; transferring the fertilized eggs into an incubation container, incubating for 3-8 days at 16-26 ℃, and sun-illuminating for at least 4 hours every day; after 3 days, about 80% of the fry can freely swim, move into a nursery pond, and feed live brine shrimp as initial feed. The method provided by the invention is convenient and feasible, and can reduce the damage to the parent fish; the provided goldfish initial feed is rich in nutrition, belongs to 'live feed', and is helpful for maintaining stable water quality.

Description

Goldfish breeding method

Technical Field

The invention relates to the technical field of aquatic product breeding, in particular to a goldfish breeding method.

Background

Goldfish is a traditional ornamental fish in China, once bred in Beijing, Hangzhou, Fuzhou and other places, and the ornamental culture of goldfish by households is daily at that time. From ancient times to present, the charm of goldfish continues. With the change of times, the living environment of people changes, and the goldfish breeding and seedling raising technology is improved along with the environment. At present, goldfishes bred at home are generally indoors and are small in water, goldfish lovers work busyness at ordinary times, and can only enjoy the interest of breeding and breeding goldfishes in leisure time.

Currently, two types of goldfish reproduction exist: one is a method for laying eggs on fish nests naturally, the required egg amount and fertilization rate are uncontrollable, redundant eggs and sperms can accelerate water quality deterioration in parent fish culture water, and then the water change amount must be increased, so that the postpartum recovery of parent fish is not facilitated; the second method is artificial propagation by injecting oxytocin, and the method has poor quality of fertilized eggs and great damage to parent fishes.

The initial feed for goldfish at present mainly comprises egg yolk, powdered feed, frozen rotifer, frozen paramecium, live rotifer and live paramecium. The first four have higher nutrition, belong to 'dead baits', are easy to deteriorate in water, cause water deterioration and require frequent water change, and the frequent water change in a seedling stage can cause the death rate and the deformity rate to rise; live rotifers and live paramecium belong to 'live baits', are rich in nutrition and are beneficial to maintaining stable water quality, but generally live in a ditch of a pond, need to manually go out to search for salvage, have unstable salvage amount, possibly introduce parasites and influence feeding of goldfish seedlings.

In view of the above, the present invention is particularly proposed.

Disclosure of Invention

The invention relates to a goldfish breeding method, which comprises the following steps:

carrying out artificial insemination on the parent fish in natural estrus: firstly, lightly putting the female fish into a breeding container with prepared water, lightly holding the female fish in the water, and lightly stroking the abdomen of the female fish from the front end of the ovary at the pectoral fin backwards to ensure that mature eggs flow out of the reproductive hole and are uniformly distributed at the bottom of the container; stimulating the male fish to discharge sperms by the same method, and fully contacting the male fish with the eggs for fertilization, so that the eggs are fertilized within 1 minute after the fish body is ionized by the eggs to obtain fertilized eggs;

transferring the fertilized eggs into an incubation container, incubating for 3-8 days at 16-26 ℃, and sun-illuminating for at least 4 hours every day; after 3 days, about 80% of the fry can freely swim, move into a nursery pond, and feed live brine shrimp as initial feed.

Optionally, in the method for breeding goldfish, the step of fully contacting and fertilizing specifically includes:

standing the sperm and the ovum which are just discharged in water for 15-50 minutes to fully fertilize the ovum; and (4) changing water to wash off dead sperms and other sundries attached to the fertilized eggs.

Optionally, in the method for breeding goldfish, parent fish is selected in 3-5 months in spring and 9-10 months in autumn, and male and female parent fish are put into the same parent fish tank for breeding, and the sun is irradiated for at least 3 hours every day, so that the parent fish can estrus synchronously.

Optionally, the goldfish breeding method further comprises prenatal examination before artificial insemination, and the examination method comprises:

holding female fish in water, and starting from the pectoral fin of the fish body, stroking towards the hip fin direction gently, if a plump glittering and translucent yellowish ovum flows out, the ovum is mature; the method is used for inspecting the male fish, white semen can be stripped out, the semen can be diffused quickly when meeting water to indicate that the semen is fully mature, artificial insemination can be performed, and the semen can not be diffused slowly when meeting water to indicate that the semen is unqualified.

Optionally, according to the goldfish breeding method, after artificial insemination is completed, the parent fish is placed back into the parent fish tank, so that the water stability of the parent fish tank is maintained, and disturbance is avoided; feeding amount is gradually increased from day 3 after 2 days.

Optionally, in the goldfish breeding method, the hatching container is larger than the container for containing the fertilized eggs, and the operation of transferring the fertilized eggs into the hatching container includes: and injecting part of water into the incubation container, slowly placing the fertilized egg container with the water on the water surface of the incubation container, and floating the upper part 1/4-1/2 of the fertilized egg container on the water surface.

Optionally, in the method for breeding goldfish, after the fry are cultivated for seven days, feeding part of the frozen brine shrimp when feeding, and feeding the live brine shrimp after eating.

Optionally, in the method for breeding goldfish, the hatching method of the brine shrimp is as follows:

adding 20-30 g of salt and 5-15 g of brine shrimp eggs into each liter of water, maintaining the water temperature at 23-25 ℃, and carrying out oxygen explosion for 22-26 h.

Alternatively, the goldfish breeding method as described above, wherein each of the containers used in the method is sterilized.

Optionally, when the method involves a water change operation on the parent fish and the eggs or young fish thereof, the temperature difference between the fresh water and the old water is kept to be not more than +/-0.5 ℃.

The invention provides a goldfish breeding technology which is close to reality and easy to operate. The technology can reduce the damage to the parent fish, improve the quality of fertilized eggs, and the used initial feed is rich in nutrition and easy to obtain, thereby improving the survival rate of the young fishes. The implementation of whole technical process does not use any medicine and reagent to the fish, and is safe environmental protection, breeds the enjoyment of breeding the goldfish according to the environmental characteristics of breeding the goldfish of family at present according to the very big convenience goldfish fan. The technical scheme of the method is matched with the environmental characteristics of the goldfish cultured in the current family, so the method is effectively used for indoor culture, more preferably for culturing the goldfish in a small water body, and some technical points can also be applied and popularized to a goldfish culture farm in a larger scale, thereby providing a certain guiding significance for breeding the goldfish.

Compared with the traditional method, the goldfish breeding method provided by the invention is convenient and feasible, and can reduce the damage to parent fishes; the goldfish initial feed is rich in nutrition, belongs to 'live baits', is beneficial to maintaining stable water quality, can be cultivated indoors, is simple and convenient to operate, is easy to obtain, and can manually control the quantity according to actual demands.

Detailed Description

Reference will now be made in detail to embodiments of the invention, one or more examples of which are described below. Each example is provided by way of explanation, not limitation, of the invention. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope or spirit of the invention. For instance, features illustrated or described as part of one embodiment, can be used on another embodiment to yield a still further embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

"Goldfish" (Carassius auratus) is an ornamental fish native to China and is a color variety evolved from wild crucian. In the present invention, goldfish may include the following categories:

grass seeds: the shape is similar to that of crucian, but the color is bright, such as: and (5) red crucian carp.

Culture medium: the body type looks down the character type accident name in seal character form. Basically similar to dragon species, but without eyeball prominence, such as: the varieties of the pearl goldfish (appearing in 1900 years), the gill turning (appearing in 1911 years) and the like.

Dragon planting: is a typical variety of goldfish, with swollen eyes and four leaves (two tails) on tail fin, such as "longjing (appearing in 1592 cultivation)".

Egg breeding: it is fat and egg-shaped. The main characteristics are that no dorsal fin exists, the eyeball does not protrude, such as: "tiger head", "blister (appearing in 1908 year of cultivation)", etc.

Dragon back is used for planting, without dorsal fins, the back is arched. Herniated eyeball, such as: "Wangtianyan (appearing in 1870 cultivation)", etc.

The container for cultivating goldfish is made of glass, plastic, metal, ceramic, etc.

The water adopted by the cultivation of the invention is used for the growth of goldfish, wherein the goldfish is preferably bred by 0.5 percent saline solution, chlorine gas exists in tap water, the goldfish is firstly exposed in the air for half a day to remove chlorine, or commercial neutralization solution or vitamin C candy is used for rinsing for four to five times to neutralize toxicity. If not specifically mentioned, the water temperature may be controlled at 15 ℃ to 26 ℃, for example, 16 ℃, 17 ℃, 18 ℃, 19 ℃, 20 ℃, 21 ℃, 22 ℃, 23 ℃, 24 ℃ and 25 ℃. Meanwhile, the temperature difference between day and night is not easy to be overlarge.

In some embodiments, the step of fully contacting fertilization specifically comprises:

In some embodiments, the parent fish is selected in spring from 3 months to 5 months and autumn from 9 months to 10 months, and the male and female parent fish are placed in the same parent fish tank for breeding, and the sun is irradiated for at least 3 hours every day, so that the parent fish can synchronously estrus.

The parent fish is selected to have strong physique, good appetite and obvious variety characteristics. The genital orifices of the female fishes are protruded, the female fishes are slightly red and swollen, the abdomen of the female fishes is expanded, the female fishes are soft and slightly elastic, and the outline of the ovaries is obvious; the male fish is strong, the gill cover and the first fin line of the pectoral fin have obvious white chasing stars, and the male fish has strong rough feeling when touched by hands.

In some embodiments, the method further comprises a prenatal examination prior to the artificial insemination, the examination method comprising:

The sperm and the ovum of the parent fish are not mature and need not to be taken out forcibly, otherwise the damage to the parent fish is larger.

In some embodiments, the parent fish is placed back into the parent fish tank after the artificial insemination is completed, so that the water stability of the parent fish tank is maintained, and the disturbance is avoided; feeding amount is gradually increased from day 3 after 2 days.

If the parent fish tank has other temporary female and male fish, the temporary female and male fish should be taken out, manually assisted to be discharged into mature ovum and sperm, discarded, and the parent fish is put back into the original tank for resting.

In some embodiments, the incubation container is larger than the container holding the fertilized egg, and the operation of moving the fertilized egg into the incubation container comprises: and injecting part of water into the incubation container, slowly placing the fertilized egg container with the added water on the water surface of the incubation container, and floating the upper part 1/4-1/2 of the fertilized egg container on the water surface.

In some embodiments, after the fry are raised for seven days, feeding the fry with partially frozen brine shrimp before feeding the fry, and feeding the fry with live brine shrimp after eating the fry.

By the operation, the water quality deterioration caused by the residual baits can be avoided to the greatest extent.

In some embodiments, the method for hatching the brine shrimp is as follows:

The hatched brine shrimp can be fished by a fish net (about 150 meshes for braising). The hatched live brine shrimp can continuously survive for about 5 hours in the fry rearing tank, so that the redundant brine shrimp in the tank can not rot and deteriorate within 5 hours to influence the water quality, and young fishes can freely eat after eating. Compared with dead baits such as egg yolk and powdery feed, the bait can better maintain water quality and is beneficial to seedling cultivation.

In some embodiments, each container used in the method is sterilized.

The disinfection treatment method comprises but is not limited to potassium permanganate soaking, salt soaking (with the preferred concentration of 3-5 percent) and strong chlorine essence soaking.

In some embodiments, the difference between the temperature of the fresh water and the temperature of the old water is maintained at not more than ± 0.5 ℃ when the method involves a water change operation for the parent fish and the eggs or the young fish thereof.

Embodiments of the present invention will be described in detail with reference to examples.

Examples

The embodiment is researched and developed in the improved variety breeding base of the small Tangshan of the research institute of aquatic science in Beijing city, and the used goldfish variety is HongWantianyan goldfish. After the artificial propagation is carried out by using the technology, the injury and death rate of the parent fish in the HongWang Tianyan eye is 0 through the postpartum maintenance of the parent fish; when the technology is used for hatching the fertilized eggs, the hatchability is about 95 percent, the seedling survival rate is about 98 percent, and the practical requirements can be met.

The specific implementation is as follows:

1. parent fish selection and treatment: generally, in the breeding period of goldfish, in spring 3-5 months and autumn 9-10 months every year, individuals with strong physique, good appetite and obvious variety characteristics are selected as parent fish. The genital orifices of the female fishes are protruded, the female fishes are slightly red and swollen, the abdomen of the female fishes is expanded, the female fishes are soft and slightly elastic, and the outline of the ovaries is obvious; the male fish is strong, the gill cover and the first fin line of the pectoral fin have obvious white chasing stars, and the male fish has strong rough feeling when touched by hands. The selected female fish and male fish are placed in the same container, and are irradiated by the sun for at least 3 hours every day, so that good ventilation and air permeability are achieved. Therefore, the estrus of the male and female fishes can be synchronized, and the situation that the estrus of the male and female fishes is asynchronous and cannot be bred due to different culture environments caused by the fact that the male and female fishes are separated from the culture tank is avoided.

2. Preparation before propagation: about one week before propagation, preparing propagation and incubation tools which mainly comprise an incubation container, a seedling culture container, an initial bait culture device and the like. According to the practical situation, the hatching container can be selected, such as plastic pots which are convenient and easy to obtain are selected, the plastic pots with different sizes are selected as the hatching pots, and the hatching pots are cleaned, disinfected and aired for later use. The seedling raising container can be selected from a glass jar or a plastic jar according to actual conditions, cleaned, disinfected and aired for later use. The disinfection can be carried out by soaking with about 4% of salt or strong chlorine for at least 1 hr, or soaking before working in the morning, and washing and drying after working in the evening. The initial bait culture needs a heating rod, an oxygen adding device and a brine shrimp egg incubator, which are easily purchased.

3. Artificial insemination

3.1, prenatal examination: the breeding season is observed, generally, the goldfish spawns 5-10 points in the morning, and when parent fish are found to chase violently, the sperm and the ovum in male and female fish are mature and are a sign of near birth. At this time, clear water which is dried and has the same temperature as the parent fish tank (the temperature difference is not more than +/-0.5 ℃) is added into the plastic basin which is sterilized and prepared in the earlier stage, and the water depth is just over the fish back. The parent fish is fished up by a basin or a spoon together with the hosepipe fish and put into a plastic basin with water on the upper surface, and antenatal examination is firstly carried out. The operation method is that the thumb, the index finger and the middle finger of the left hand clamp the tail handle of the female fish to prevent the female fish from swinging left and right, then the thumb and the index finger of the right hand are smoothed towards the hip fin from the pectoral fins on the two sides of the fish body, if the plump, crystal-clear and transparent faint yellow eggs flow out, the eggs are mature and can be artificially inseminated, otherwise, the female fish is placed back into the original container to be fed, so that the forced extrusion is avoided, the injury to the parent fish and the influence on the fertility rate of the eggs are avoided, and the hatchability is reduced. The inspection method of the male fish is the same as that of the female fish, white semen can be stripped out, the semen can be diffused quickly when meeting water to indicate that the semen is fully mature, artificial insemination can be performed, if the semen can not be diffused slowly when meeting water, the semen is unqualified, the fertilization rate is influenced, and the male fish can be put back to the original container for feeding.

3.2, artificial propagation: after prenatal examination, after determining that both male and female fishes can breed, adding clear water which is well aired and has the same temperature as the parent fish tank (the temperature difference is not more than +/-0.5 ℃) into a plastic basin which is prepared by disinfection in the early stage, and controlling the water depth just before the fish backs. According to the actual required egg amount, plastic pots with corresponding amount can be prepared, water is added, and the plastic pots can be used as spawning pots for artificial insemination. The method comprises the steps of firstly, lightly putting female fishes into a spawning basin with good water, lightly gathering tail handles of the female fishes with the left hand to prevent the female fishes from swinging left and right, lightly holding the fish heads with the right hand to enable the female fishes to stand in the spawning basin, lightly stroking the abdomens of the female fishes backwards from the front ends of ovaries at pectoral fins by the thumbs of the right hand, namely, mature eggs flow out of reproductive holes, moving the female fishes while stroking, enabling the eggs to be evenly scattered at the bottom of the basin, avoiding the eggs from being overlapped and crowded, enabling the densities of the eggs to be even and proper, enabling the grains to be unconnected, and quickly moving the female fishes to another spawning basin with good water after the bottom of the basin is fully paved with the eggs. And quickly putting the male fish into a basin full of ova, taking mature sperms into the basin according to the operation method, moving the male fish while squeezing, enabling the sperms to be uniformly dispersed in a spawning basin as far as possible until the amount of the sperms is enough for the ova to be fertilized, and quickly moving the male fish to another spawning basin with prepared water. Then the same operation is carried out in another spawning basin until the fertilized eggs which are actually needed are obtained. And if the mature ova and sperms of the male and female fish are not discharged completely, the rest ova and sperms are stroked out by the same manual operation, the rest ova and sperms are discarded, and the parent fish which has laid the ova and the sperms is put back into the parent fish tank. Therefore, the parent fish can be prevented from discharging the residual mature ova and sperms to the parent fish tank, the water quality deterioration is accelerated, and the stimulation to the parent fish is reduced. Therefore, the water quality of the parent fish tank can be maintained stable, the water change is prolonged, and the postpartum recovery and the resting of the parent fish are facilitated.

4. Fertilized egg treatment: after the artificial insemination in the previous step, the spawning pot fully paved with fertilized eggs is kept still for about 30 minutes to ensure that the eggs are fully fertilized. And pouring water in the fertilized egg basin, slightly adding clear water which is prepared in advance and is well aired and has the same temperature (the temperature difference is not more than +/-0.5 ℃) with the parent fish tank along the edge of the basin, slightly shaking the fertilized egg basin to pour the water after the water passes through the fertilized eggs for about 1 cm, and cleaning the dead sperms and other sundries attached to the fertilized eggs. After fertilized eggs in each pot are operated twice, clear water which is prepared in advance and is well aired and has the same temperature with the parent fish tank (the temperature difference is not more than +/-0.5 ℃) is lightly added along the edge of the pot to two thirds of the pot for incubation.

5. Hatching fertilized eggs: and (4) placing the fertilized egg pot treated in the previous step and added with clear water into an incubation container. The incubation container is larger than the fertilized egg pot, and clear water which is prepared and dried well and has the same temperature with the parent fish tank (the temperature difference is not more than +/-0.5 ℃) is added in advance, so that one third of the fertilized egg pot floats on the water to begin incubation. During the incubation period, the incubation temperature is kept between 16 and 26 ℃, good ventilation is taken, dirty dust is prevented from falling into the incubation temperature, the sun is irradiated for at least 4 hours every day, and the incubation basin is not required to be moved randomly. Generally, 3-8 days, the fry is taken out of the membrane, the membrane taking period is sensitive, the hatching basin needs to be kept stable, and the distortion rate can be increased by shaking the water surface. The young fish just coming out of the membrane is weak and attached to the bottom of the basin, and strong young fishes move and attach to the wall of the basin after one day, so the fish is called as a 'hang Ding'. The young fish can absorb the nutrition of the yolk sac of the young fish within 3 days after coming out of the membrane without feeding. After 3 days, the strong seedling can leave the pot wall and move freely, called take-off. The seedlings take off during the whole hatching period, the hatching pot is not moved, and good ventilation is kept.

6. And (3) postpartum maintenance of parent fishes: postpartum parent fish is weak and needs to be kept still, and the water stability of the parent fish tank is maintained as much as possible. Good ventilation and ventilation, sufficient illumination, poor appetite of the parent fish within 2 days after delivery, reduced feeding according to the actual requirement, and the redundant materials must be taken out as soon as possible without stimulating frightened parent fish as much as possible. The feed amount may be gradually increased starting on the third day. During the period, if the parent fish tank has other temporary female and male fish and the fertilized eggs obtained after the third step of artificial fertilization are enough, the temporary female and male fish is preferably taken out of mature eggs and sperms by the same manual operation method as the step 3, the mature eggs and sperms are abandoned, and the parent fish is put back into the original tank for static culture. Note that the sperm and ovum of the parent fish are not mature and need not be taken out forcibly, otherwise the damage to the parent fish is large.

7. Cultivating initial bait: when the young seedlings are hung on the dices, initial bait cultivation can be performed. The technology adopts a method of hatching the eggs of the brine shrimps to obtain live brine shrimps which are used as initial feed for young seedlings. The brine shrimp eggs are easily bought in the market and can be obtained in any size. The incubator for the brine shrimp eggs is also easy to purchase and convenient to use, and can be made by waste plastic bottles according to the actual conditions of indoor families, and how to manufacture the incubator is not related here for a while. The specific incubation operation is as follows: adding water into the brine shrimp egg incubator, and maintaining the water temperature at 23-25 ℃ (the incubator can be placed in a water adding container, a heating rod is added in the container, and the temperature is adjusted to 25 ℃, so that the incubator can be in a water bath state, and the temperature is kept stable; adding 20g to 30g of salt into each liter of water, synchronously adding about 10g of brine shrimp eggs, and continuously adding oxygen into the bottom of the incubator, wherein the brine shrimp is completely incubated for 22h to 26 h. At the moment, the brine shrimp is discharged from a valve at the bottom of the incubator to a net graw with 150 meshes for filtering, and then clear water is dripped on the net graw for filtering slightly, so that the brine shrimp can be sucked into a juvenile fish tank by a dropper for being eaten by juvenile fish. If redundant brine shrimp is hatched once, the brine shrimp can be collected and frozen into a refrigerator with the temperature of 20 ℃ below zero, so that waste is prevented.

8. Seedling cultivation: the seedling cultivation here refers to a period of two weeks from the "take off" of the seedlings into the nursery pots.

8.1, putting seedlings into a seedling raising container: after the seedlings hatched in the step 5 take off, clear water which is fully aired and has the same temperature as the hatching basin (the temperature difference is not more than +/-0.2 ℃) is added into the seedling raising jar, and the water depth is about three quarters of the seedling raising jar. Moving the hatching pot of the seedling into the seedling raising jar gently, floating and standing for about 20 minutes, pressing the edge of the pot gently, filling a small amount of water, standing for about 5 minutes, filling more water in the same way, standing for 5 minutes again, pressing the edge of the pot to immerse the pot into the water, removing the pot gently, and putting all the seedlings into the jar.

8.2, feeding the initial feed for the seedlings: after the young fishes enter the tank, attention is paid to observation, and when about 80% of the young fishes can move freely instead of lying on the bottom of the tank, the young fishes adapt to the new environment. And at the moment, taking the live brine shrimp hatched in the step 7, dripping the live brine shrimp to a fry rearing tank by a dropper, and observing whether the juvenile fish has foraging behavior or not. If ten minutes later, the brine shrimp can not be observed in the jar, the belly of the juvenile fish is pink, which indicates that the juvenile fish is successfully opened, and at the moment, a proper amount of live brine shrimp is continuously dropped for the juvenile fish to eat freely. Through observation, the hatched live brine shrimp can continuously survive for about 5 hours in the fry rearing tank, so that the redundant brine shrimp in the tank can not rot and deteriorate within 5 hours to influence the water quality, and young fishes can freely eat. Compared with dead baits such as egg yolk and powdery feed, the bait can better maintain water quality and is beneficial to seedling cultivation.

8.3, daily management: the brine shrimp can be used as bait from the taking off of the young seedlings to the entering of the seedling raising tank within two weeks. During the seedling cultivation period, ventilation is needed, live baits are mainly used for feeding the brine shrimp, and after the live baits are fed for 5 hours, residual dead brine shrimp and excrement are at the bottom of the tank and can be sucked out slightly by a suction pipe, so that bad water is prevented. The hatched redundant brine shrimp can be frozen and stored, after the young seedlings are cultivated for seven days, partial frozen brine shrimp is fed firstly when the young shrimps are fed, the young shrimps are observed to eat the brine shrimp, and then the live brine shrimp is fed, so that the bait can be prevented from breaking out of water. Observing the density of the fish fry in the fry rearing tank after the fry is about 1 cm, and adding oxygen if the fry is too dense, or treating the fry in different tanks.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A goldfish breeding method is characterized by comprising the following steps:

2. The goldfish breeding method according to claim 1, wherein the step of fully contacting and fertilizing specifically comprises:

3. The goldfish breeding method according to claim 1, wherein parent fish selection is performed in spring for 3-5 months and autumn for 9-10 months, and male and female parent fish are raised in the same parent fish tank and are exposed to sunlight for at least 3 hours every day to allow the parent fish to estrus synchronously.

4. The goldfish breeding method according to claim 1, further comprising prenatal examination before artificial insemination, wherein the examination method comprises:

5. The goldfish breeding method according to claim 1, wherein after the artificial insemination is completed, the parent fish is placed back into the parent fish tank to maintain the water stability of the parent fish tank and avoid disturbance; feeding amount is gradually increased from day 3 after 2 days.

6. The goldfish breeding method according to claim 1, wherein the hatching container is larger than a container containing fertilized eggs, and the operation of transferring the fertilized eggs into the hatching container comprises: and injecting part of water into the incubation container, slowly placing the fertilized egg container with the added water on the water surface of the incubation container, and floating the upper part 1/4-1/2 of the fertilized egg container on the water surface.

7. The goldfish breeding method according to claim 1, wherein after the fries are cultivated for seven days, part of the frozen brine shrimps are fed firstly during feeding, and then the live brine shrimps are fed after eating.

8. The goldfish breeding method according to any one of claims 1 to 7, wherein the hatching method of the brine shrimp is as follows:

9. The method for breeding goldfish according to any one of claims 1 to 7, wherein each container used in the method is sterilized.

10. The goldfish breeding method according to any one of claims 1 to 7, wherein the fresh water and the old water are kept at a temperature not more than +/-0.5 ℃ when the method involves a water change operation for the parent fish and the eggs or the young fish thereof.