CN111296331A - Artificial breeding and seedling raising method for pelteobagrus fulvidraco - Google Patents

Artificial breeding and seedling raising method for pelteobagrus fulvidraco Download PDF

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CN111296331A
CN111296331A CN202010155497.XA CN202010155497A CN111296331A CN 111296331 A CN111296331 A CN 111296331A CN 202010155497 A CN202010155497 A CN 202010155497A CN 111296331 A CN111296331 A CN 111296331A
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pelteobagrus fulvidraco
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CN111296331B (en
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冯鹏霏
马华威
何金钊
潘传燕
唐东娇
杨明伟
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Guangxi Academy of Fishery Sciences
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    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01KANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K61/00Culture of aquatic animals
    • A01K61/10Culture of aquatic animals of fish
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/66Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/80Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
    • Y02A40/81Aquaculture, e.g. of fish

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Abstract

The invention discloses a method for artificial propagation and breeding of pelteobagrus fulvidraco, which comprises the steps of selecting fast-maturing pelteobagrus fulvidraco, and feeding magnetic and male fish separately; adding oxytocin into feed for feeding for a period of time, simultaneously increasing white light irradiation, and adding ovulation-promoting agent in later stage; the method comprises the following steps of (1) carrying out mixed feeding on magnetic fish and male fish, dividing the magnetic fish and the male fish into two parts by using a fishing net, dividing all pelteobagrus fulvidraco into two parts, feeding the pelteobagrus fulvidraco at one side of a water inlet of a water pool, adding a spawning agent into water, and keeping running water flowing; keeping the water temperature and adjusting the pH value of the water, and pumping oxygen into the water pool to be fertilized and incubated by the fish eggs; the breeding range of the hatched seedlings is properly widened, then the seedling feed is dissolved in water and is guided into the water for feeding, a proper amount of white light irradiation is provided, and the seedlings with different volumes are screened and separately bred after 10-20 days. The method can rapidly carry out artificial breeding operation and seedling raising, can carry out artificial spawning induction on the pelteobagrus fulvidraco in a more natural state, and is simple and convenient to operate and good in breeding effect.

Description

Artificial breeding and seedling raising method for pelteobagrus fulvidraco
Technical Field
The invention relates to the technical field of fish fry breeding, in particular to an artificial breeding and fry breeding method for pelteobagrus fulvidraco.
Background
The yellow catfish belongs to the catfishes, the pseudobagaceae and the pseudobagrus, is a high-quality rare economic fish in a fresh water area, is deeply favored by people due to delicious meat quality, but the fishing amount of rivers cannot meet the market demand easily; in recent years, artificial breeding of pelteobagrus fulvidraco has been developed in many places throughout the country, the breeding scale is increased year by year, and the breeding yield of pelteobagrus fulvidraco in China exceeds 350000 tons in 2015. Fry breeding of catfishes such as pelteobagrus fulvidraco basically comprises artificial spawning induction, repeated injection of medicaments, emasculation and sperm extraction, and hatching in a special hatching tank; the proportion of male and female in natural waters is seriously imbalanced, so that natural resources are seriously exhausted, certain hidden danger exists in edible safety, and the work efficiency is slow through the artificial injection induced spawning technology, so that a method capable of solving the problems needs to be found.
Disclosure of Invention
The invention aims to: aiming at the problems, the method for quickly carrying out artificial propagation operation and seedling culture is provided, the artificial induced spawning of the pelteobagrus fulvidraco can be carried out in a more natural state by the method, the operation is simple and convenient, and the propagation effect is good.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows:
an artificial breeding and seedling raising method for pelteobagrus fulvidraco comprises the following steps:
(1) parent screening: selecting the fast-maturing and large pelteobagrus fulvidraco in the same period, feeding the magnetic and male pelteobagrus fulvidraco separately and feeding the same feed until the pelteobagrus fulvidraco is completely mature for later use;
(2) hastening parturition before breeding: adding oxytocin into feed for feeding for a period of time, simultaneously increasing white light irradiation, and adding ovulation-promoting agent into later-stage magnetic fish;
(3) fertilization and propagation: the method comprises the following steps of (1) carrying out mixed feeding on magnetic pelteobagrus fulvidraco and male pelteobagrus fulvidraco, then dividing a water pool into two parts by using a fishing net, dividing all pelteobagrus fulvidraco into one side of a water inlet of the water pool for feeding, adding a spawning agent into water, and keeping running water flowing;
(4) hatching management: after the female pelteobagrus fulvidraco and the male pelteobagrus fulvidraco lay eggs, keeping the water temperature and adjusting the pH value in the water, and pumping oxygen into the water pool to wait for fertilization and incubation of fish eggs;
(5) seedling cultivation and screening: the breeding range of the hatched seedlings is properly widened, then the seedling feed is dissolved in water and is guided into the water for feeding, a proper amount of white light irradiation is provided, and the seedlings with different volumes are screened and separately bred after 10-20 days.
Further, in the step (1), the pelteobagrus fulvidraco in the same period is bred in the postnatal period for 5-6 months, the weight of the pelteobagrus fulvidraco is 80-100g, the feed is prepared by cooking sweet potatoes, mashing and mixing the cooked sweet potatoes and bananas, adding shrimp shell powder, sweet potato stems and leaves, corn and glucose, completely crushing, mixing, airing and crushing again.
Furthermore, the feed comprises 80-120 parts of sweet potatoes, 10-50 parts of bananas, 20-60 parts of shrimp shell powder, 70-100 parts of sweet potato stems and leaves, 30-40 parts of corns and 1-3 parts of glucose by weight.
In the step (2), the white light irradiation is carried out for 1-3h by using 80-120Lx white light irradiation, the oxytocin is chorionic gonadotropin, the addition amount is 0.05-0.5 percent of the mass of the feed, and the ovulation promoting agent is added into the feed for feeding after the addition of the oxytocin is stopped.
Furthermore, the ovulation promoting agent is prepared by extracting 10-12 parts of semen cuscutae, 6-8 parts of ramie root, 11-13 parts of lotus petiole and 5-7 parts of folium artemisiae argyi with alcohol, concentrating into extract, adding 0.1-1 part of luteinizing releasing hormone, adding 50-100 parts of corn flour, uniformly mixing, airing and crushing.
Further, in the step (3), the temperature of the water in the water tank is 25-28 ℃, the oviposition agent is a plant oviposition agent, and the fermentation liquor is diluted and poured into the water tank after the fermentation of plant leaves.
Further, the plant leaves are olive leaves.
Further, in the step (4), the water temperature is adjusted to 20-23 ℃, the pH value of the water is adjusted to 6-7, and the fertilized eggs are slowly stirred while pumping oxygen, so that the fertilized eggs are subjected to membrane rupture separation as soon as possible.
Further, in the step (5), the white light irradiation is performed for 1 to 3 hours by using white light irradiation of 50 to 80Lx, and the irradiation is continued after being extinguished for 4 to 8 hours.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the method of the invention utilizes the special property that the illumination can promote the increase of cell activity and promote the living division of cells, ensures the sufficient illumination for the magnetic pelteobagrus fulvidraco when breeding the egg cells, and the white light can also ensure the growth of algae in water to provide food for the pelteobagrus fulvidraco;
2. according to the invention, the pelteobagrus fulvidraco is isolated at one side of the water inlet for breeding and discharging the ovum and the sperm during fertilization breeding, so that the phenomenon that the ovum and the sperm discharged during feeding of the pelteobagrus fulvidraco are mistakenly eaten to influence the seedling yield is avoided.
3. According to the invention, the water body can be adjusted to be weakly acidic by adding the oviposition agent taking the olive leaves as the raw material, and the fermentation product in the olive leaves is beneficial to stimulating the pelteobagrus fulvidraco to oviposit as soon as possible.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to preferred embodiments. It should be noted, however, that the numerous details set forth in the description are merely for the purpose of providing the reader with a thorough understanding of one or more aspects of the present invention, which may be practiced without these specific details.
Example 1
An artificial breeding and seedling raising method for pelteobagrus fulvidraco comprises the following steps:
(1) parent screening: the method comprises the steps of selecting fast-maturing and large yellow catfishes in the same period, feeding the magnetic and male fishes separately, feeding the magnetic and male fishes with the same feed, keeping the magnetic and male fishes completely mature for later use, breeding the yellow catfishes 5-6 months after birth, keeping the weights of the yellow catfishes at 80-100g, cooking sweet potatoes, smashing and mixing the feed with bananas, adding shrimp shell powder, sweet potato stems and leaves, corn and glucose, completely crushing, mixing, airing and crushing again to form the feed; the feed comprises 80 parts of sweet potatoes, 10 parts of bananas, 20 parts of shrimp shell powder, 70 parts of sweet potato stems and leaves, 30 parts of corns and 1 part of glucose in parts by weight;
(2) hastening parturition before breeding: adding oxytocin into the feed for feeding for a period of time, simultaneously increasing white light irradiation, and adding an ovulation promoting agent into later-stage magnetic fish, wherein the white light irradiation is 80Lx white light irradiation for 1h, the oxytocin is chorionic gonadotropin, the addition amount of the oxytocin is 0.05 percent of the mass of the feed, and the ovulation promoting agent is added into the feed for feeding after the oxytocin addition is stopped; the ovulation promoting agent is prepared by extracting semen Cuscutae 10 parts, radix Boehmeriae 6-8 parts, petiolus Nelumbinis 11 parts, and folium Artemisiae Argyi 5 parts with ethanol, concentrating into extract, adding luteinizing releasing hormone 0.1 part, adding corn flour 50 parts, mixing, air drying, and pulverizing;
(3) fertilization and propagation: the method comprises the following steps of (1) carrying out mixed feeding on magnetic pelteobagrus fulvidraco and male pelteobagrus fulvidraco, then dividing a water tank into two parts by using a fishing net, dividing all pelteobagrus fulvidraco into one side of a water inlet of the water tank for feeding, adding a spawning agent into water, keeping flowing of running water, wherein the spawning agent is a plant spawning agent, fermenting plant leaves, and then diluting fermentation liquor and pouring the fermentation liquor into the water tank, wherein the;
(4) hatching management: after the female pelteobagrus fulvidraco and the male pelteobagrus fulvidraco lay eggs, keeping the water temperature to 20 ℃, adjusting the pH value of the water to 6, pumping oxygen into the water pool, and slowly stirring to ensure that fertilized eggs are separated by breaking membranes as soon as possible, and after the fish eggs are fertilized and incubated, keeping the water temperature in the water pool at 25 ℃;
(5) seedling cultivation and screening: the breeding range of the hatched seedlings is properly widened, then the seedling feed is dissolved in water and is guided into the water for feeding, a proper amount of white light irradiation is provided, white light irradiation of 50Lx is used for 1h, the irradiation is continued after 4 h of extinction, and seedlings with different volumes are screened and separately bred after 10 days.
Example 2
An artificial breeding and seedling raising method for pelteobagrus fulvidraco comprises the following steps:
(1) parent screening: the method comprises the steps of selecting fast-maturing and large yellow catfishes in the same period, feeding the magnetic and male fishes independently, feeding the same feed, and keeping the yellow catfishes fully mature for later use, wherein the yellow catfishes in the same period are yellow catfishes bred for 6 months after birth and have the weight of 100g, cooking sweet potatoes, mashing and mixing the feed with bananas, adding shrimp shell powder, sweet potato stem leaves, corn and glucose, completely crushing, mixing, airing and crushing again to form the feed; the feed comprises the following ingredients, by weight, 120 parts of sweet potatoes, 50 parts of bananas, 60 parts of shrimp shell powder, 100 parts of sweet potato stems and leaves, 40 parts of corns and 3 parts of glucose;
(2) hastening parturition before breeding: adding oxytocin into the feed for feeding for a period of time, simultaneously increasing white light irradiation, and adding an ovulation promoting agent into later-stage magnetic fish, wherein the white light irradiation is 120Lx white light irradiation for 3 hours, the oxytocin is chorionic gonadotropin, the addition amount of the oxytocin is 0.5 percent of the mass of the feed, and the ovulation promoting agent is added into the feed for feeding after the oxytocin addition is stopped; the ovulation promoting agent is prepared by extracting semen Cuscutae 12 parts, radix Boehmeriae 8 parts, petiolus Nelumbinis 13 parts, and folium Artemisiae Argyi 7 parts with ethanol, concentrating into extract, adding luteinizing releasing hormone 1 part, adding corn flour 100 parts, mixing, air drying, and pulverizing;
(3) fertilization and propagation: the method comprises the following steps of (1) carrying out mixed feeding on magnetic pelteobagrus fulvidraco and male pelteobagrus fulvidraco, then dividing a water tank into two parts by using a fishing net, dividing all pelteobagrus fulvidraco into one side of a water inlet of the water tank for feeding, adding a spawning agent into water, keeping flowing of running water, wherein the spawning agent is a plant spawning agent, fermenting plant leaves, and then diluting fermentation liquor and pouring the fermentation liquor into the water tank, wherein the;
(4) hatching management: after the female pelteobagrus fulvidraco and the male pelteobagrus fulvidraco lay eggs, keeping the water temperature to 23 ℃, adjusting the pH value of the water to 7, pumping oxygen into the water pool, and slowly stirring to ensure that fertilized eggs are separated by breaking membranes as soon as possible, and after the fish eggs are fertilized and incubated, keeping the water temperature in the water pool at 28 ℃;
(5) seedling cultivation and screening: the breeding range of the hatched seedlings is properly widened, then the seedling feed is dissolved in water and is guided into the water for feeding, a proper amount of white light irradiation is provided, white light irradiation of 80Lx is used for 3 hours, the irradiation is continued after 8 hours of extinction, and the seedlings with different volumes are screened and separately bred after 20 days.
Example 3
An artificial breeding and seedling raising method for pelteobagrus fulvidraco comprises the following steps:
(1) parent screening: the method comprises the steps of selecting fast-maturing and large yellow catfishes in the same period, feeding the magnetic and male fishes separately, feeding the magnetic and male fishes with the same feed, keeping the magnetic and male fishes completely mature for later use, breeding the yellow catfishes 5-6 months after birth, keeping the weights of the yellow catfishes at 80-100g, cooking sweet potatoes, smashing and mixing the feed with bananas, adding shrimp shell powder, sweet potato stems and leaves, corn and glucose, completely crushing, mixing, airing and crushing again to form the feed; the feed comprises 100 parts of sweet potatoes, 30 parts of bananas, 45 parts of shrimp shell powder, 85 parts of sweet potato stems and leaves, 35 parts of corns and 2 parts of glucose;
(2) hastening parturition before breeding: adding oxytocin into the feed for feeding for a period of time, simultaneously increasing white light irradiation, and adding an ovulation promoting agent into later-stage magnetic fish, wherein the white light irradiation is performed for 2 hours by using 100Lx white light irradiation, the oxytocin is chorionic gonadotropin, the addition amount of the oxytocin is 0.1% of the mass of the feed, and the ovulation promoting agent is added into the feed for feeding after the oxytocin addition is stopped; the ovulation promoting agent is prepared by extracting 11 parts of semen Cuscutae, 7 parts of radix Boehmeriae, 12 parts of petiolus Nelumbinis, and 6 parts of folium Artemisiae Argyi with ethanol, concentrating into extract, adding 0.5 part of luteinizing releasing hormone, adding 80 parts of corn flour, mixing, air drying, and pulverizing;
(3) fertilization and propagation: the method comprises the following steps of (1) carrying out mixed feeding on magnetic pelteobagrus fulvidraco and male pelteobagrus fulvidraco, then dividing a water tank into two parts by using a fishing net, dividing all pelteobagrus fulvidraco into one side of a water inlet of the water tank for feeding, adding a spawning agent into water, keeping flowing of running water, wherein the spawning agent is a plant spawning agent, fermenting plant leaves, and then diluting fermentation liquor and pouring the fermentation liquor into the water tank, wherein the;
(4) hatching management: after the female pelteobagrus fulvidraco and the male pelteobagrus fulvidraco lay eggs, keeping the water temperature to 20 ℃, adjusting the pH value of the water to 7, pumping oxygen into the water pool, and slowly stirring to ensure that fertilized eggs are separated by breaking membranes as soon as possible, and after the fish eggs are fertilized and incubated, keeping the water temperature in the water pool at 27 ℃;
(5) seedling cultivation and screening: the breeding range of the hatched seedlings is properly widened, then the seedling feed is dissolved in water and is guided into the water for feeding, a proper amount of white light irradiation is provided, 60Lx white light irradiation is used for 2 hours, the irradiation is continued after 6 hours of extinction, and after 15 days, seedlings with different volumes are screened and separately bred.
Comparative example 1
An artificial breeding and seedling raising method for pelteobagrus fulvidraco comprises the following steps:
(1) parent screening: the method comprises the steps of selecting fast-maturing and large yellow catfishes in the same period, feeding the magnetic and male fishes separately, feeding the magnetic and male fishes with the same feed, keeping the magnetic and male fishes completely mature for later use, breeding the yellow catfishes 5-6 months after birth, keeping the weights of the yellow catfishes at 80-100g, cooking sweet potatoes, smashing and mixing the feed with bananas, adding shrimp shell powder, sweet potato stems and leaves, corn and glucose, completely crushing, mixing, airing and crushing again to form the feed; the feed comprises 100 parts of sweet potatoes, 30 parts of bananas, 45 parts of shrimp shell powder, 85 parts of sweet potato stems and leaves, 35 parts of corns and 2 parts of glucose;
(2) hastening parturition before breeding: adding oxytocin into feed for feeding for a period of time, simultaneously increasing white light irradiation, and adding an ovulation promoter into later-stage magnetic fish, wherein the oxytocin is chorionic gonadotropin, the addition amount of the oxytocin is 0.1% of the mass of the feed, and the ovulation promoter is added into the feed for feeding after the oxytocin addition is stopped; the ovulation promoting agent is prepared by extracting 11 parts of semen Cuscutae, 7 parts of radix Boehmeriae, 12 parts of petiolus Nelumbinis, and 6 parts of folium Artemisiae Argyi with ethanol, concentrating into extract, adding 0.5 part of luteinizing releasing hormone, adding 80 parts of corn flour, mixing, air drying, and pulverizing;
(3) fertilization and propagation: the method comprises the following steps of (1) carrying out mixed feeding on magnetic pelteobagrus fulvidraco and male pelteobagrus fulvidraco, then dividing a water tank into two parts by using a fishing net, dividing all pelteobagrus fulvidraco into one side of a water inlet of the water tank for feeding, adding a spawning agent into water, keeping flowing of running water, wherein the spawning agent is a plant spawning agent, fermenting plant leaves, and then diluting fermentation liquor and pouring the fermentation liquor into the water tank, wherein the;
(4) hatching management: after the female pelteobagrus fulvidraco and the male pelteobagrus fulvidraco lay eggs, keeping the water temperature to 20 ℃, adjusting the pH value of the water to 7, pumping oxygen into the water pool, and slowly stirring to ensure that fertilized eggs are separated by breaking membranes as soon as possible, and after the fish eggs are fertilized and incubated, keeping the water temperature in the water pool at 27 ℃;
(5) seedling cultivation and screening: the breeding range of the hatched seedlings is properly widened, then the seedling feed is dissolved in water and is guided into the water for feeding, and after 15 days, seedlings with different volumes are screened and separately bred.
Comparative example 2
An artificial breeding and seedling raising method for pelteobagrus fulvidraco comprises the following steps:
(1) parent screening: the method comprises the steps of selecting fast-maturing and large yellow catfishes in the same period, feeding the magnetic and male fishes separately, feeding the magnetic and male fishes with the same feed, keeping the magnetic and male fishes completely mature for later use, breeding the yellow catfishes 5-6 months after birth, keeping the weights of the yellow catfishes at 80-100g, cooking sweet potatoes, smashing and mixing the feed with bananas, adding shrimp shell powder, sweet potato stems and leaves, corn and glucose, completely crushing, mixing, airing and crushing again to form the feed; the feed comprises 100 parts of sweet potatoes, 30 parts of bananas, 45 parts of shrimp shell powder, 85 parts of sweet potato stems and leaves, 35 parts of corns and 2 parts of glucose;
(2) fertilization and propagation: the method comprises the following steps of (1) carrying out mixed feeding on magnetic pelteobagrus fulvidraco and male pelteobagrus fulvidraco, then dividing a water tank into two parts by using a fishing net, dividing all pelteobagrus fulvidraco into one side of a water inlet of the water tank for feeding, adding a spawning agent into water, keeping flowing of running water, wherein the spawning agent is a plant spawning agent, fermenting plant leaves, and then diluting fermentation liquor and pouring the fermentation liquor into the water tank, wherein the;
(3) hatching management: after the female pelteobagrus fulvidraco and the male pelteobagrus fulvidraco lay eggs, keeping the water temperature to 20 ℃, adjusting the pH value of the water to 7, pumping oxygen into the water pool, and slowly stirring to ensure that fertilized eggs are separated by breaking membranes as soon as possible, and after the fish eggs are fertilized and incubated, keeping the water temperature in the water pool at 27 ℃;
(4) seedling cultivation and screening: the breeding range of the hatched seedlings is properly widened, then the seedling feed is dissolved in water and is guided into the water for feeding, a proper amount of white light irradiation is provided, 60Lx white light irradiation is used for 2 hours, the irradiation is continued after 6 hours of extinction, and after 15 days, seedlings with different volumes are screened and separately bred.
Comparative example 3
An artificial breeding and seedling raising method for pelteobagrus fulvidraco comprises the following steps:
(1) parent screening: the method comprises the steps of selecting fast-maturing and large yellow catfishes in the same period, feeding the magnetic and male fishes separately, feeding the magnetic and male fishes with the same feed, keeping the magnetic and male fishes completely mature for later use, breeding the yellow catfishes 5-6 months after birth, keeping the weights of the yellow catfishes at 80-100g, cooking sweet potatoes, smashing and mixing the feed with bananas, adding shrimp shell powder, sweet potato stems and leaves, corn and glucose, completely crushing, mixing, airing and crushing again to form the feed; the feed comprises 100 parts of sweet potatoes, 30 parts of bananas, 45 parts of shrimp shell powder, 85 parts of sweet potato stems and leaves, 35 parts of corns and 2 parts of glucose;
(2) hastening parturition before breeding: adding oxytocin into the feed for feeding for a period of time, simultaneously increasing white light irradiation, and adding an ovulation promoting agent into later-stage magnetic fish, wherein the white light irradiation is performed for 2 hours by using 100Lx white light irradiation, the oxytocin is chorionic gonadotropin, the addition amount of the oxytocin is 0.1% of the mass of the feed, and the ovulation promoting agent is added into the feed for feeding after the oxytocin addition is stopped; the ovulation promoting agent is prepared by extracting 11 parts of semen Cuscutae, 7 parts of radix Boehmeriae, 12 parts of petiolus Nelumbinis, and 6 parts of folium Artemisiae Argyi with ethanol, concentrating into extract, adding 0.5 part of luteinizing releasing hormone, adding 80 parts of corn flour, mixing, air drying, and pulverizing;
(3) fertilization and propagation: the magnetic pelteobagrus fulvidraco and the male pelteobagrus fulvidraco are mixed and fed, and the flowing of running water is kept;
(4) hatching management: after the female pelteobagrus fulvidraco and the male pelteobagrus fulvidraco lay eggs, keeping the water temperature to 20 ℃, adjusting the pH value of the water to 7, pumping oxygen into the water pool, and slowly stirring to ensure that fertilized eggs are separated by breaking membranes as soon as possible, and after the fish eggs are fertilized and incubated, keeping the water temperature in the water pool at 27 ℃;
(5) seedling cultivation and screening: the breeding range of the hatched seedlings is properly widened, then the seedling feed is dissolved in water and is guided into the water for feeding, a proper amount of white light irradiation is provided, 60Lx white light irradiation is used for 2 hours, the irradiation is continued after 6 hours of extinction, and after 15 days, seedlings with different volumes are screened and separately bred.
In the above examples, example 1 to example 3 were performed completely according to the operation steps of the present invention, comparative example 1 was performed without using white light irradiation, the rest of the operations were performed in accordance with example 3, comparative example 2 was performed without performing the step of hastening parturition before breeding, the rest of the operations were performed in accordance with example 3, comparative example 3 was performed in accordance with example 3 by directly mixing and feeding female and male pelteobagrus fulvidraco in step (3), and the rest of the operations were performed according to the 6 methods, respectively, and it was verified that the fertilization rate reached about 92%, the hatching rate reached about 90%, and the survival rate reached 80%, and the specific implementation data are shown in table 1.
TABLE 1 reproduction of the examples
Figure BDA0002403867300000081
As can be seen from table 1, the fertilization rates, hatching rates and survival rates were all high in examples 1 to 3, the total number of eggs laid was low and the total number of fertilized eggs was low in comparative example 1 without light irradiation, but the subsequent hatchability was comparable to that of example 3 since the subsequent implementation was consistent with the present invention, the ratio of total number of eggs laid to total number of fertilized eggs was low in comparative example 2 since the step of hastening spawning before breeding was not performed, and the ratio of total number of eggs laid to total number of fertilized eggs was low in comparative example 3 since the step of isolating the female fish and the male fish eggs from the fish eggs was not performed and the total number of fertilized eggs and hatching were impaired in comparative example 3, pelteobagrus fulvidraco could be easily mass-bred only by operating the steps completely in accordance with the present invention, and no dedicated hatching facilities were required, the operation technique was simple, and breeding techniques, breeding rates and survival rates were easily master, Low propagation cost and easy large-area popularization and application.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.

Claims (9)

1. An artificial breeding and seedling raising method for pelteobagrus fulvidraco is characterized in that: the method comprises the following steps:
(1) parent screening: selecting the fast-maturing and large pelteobagrus fulvidraco in the same period, feeding the magnetic and male pelteobagrus fulvidraco separately and feeding the same feed until the pelteobagrus fulvidraco is completely mature for later use;
(2) hastening parturition before breeding: adding oxytocin into feed for feeding for a period of time, simultaneously increasing white light irradiation, and adding ovulation-promoting agent into later-stage magnetic fish;
(3) fertilization and propagation: the method comprises the following steps of (1) carrying out mixed feeding on magnetic pelteobagrus fulvidraco and male pelteobagrus fulvidraco, then dividing a water pool into two parts by using a fishing net, dividing all pelteobagrus fulvidraco into one side of a water inlet of the water pool for feeding, adding a spawning agent into water, and keeping running water flowing;
(4) hatching management: after the female pelteobagrus fulvidraco and the male pelteobagrus fulvidraco lay eggs, keeping the water temperature and adjusting the pH value in the water, and pumping oxygen into the water pool to wait for fertilization and incubation of fish eggs;
(5) seedling cultivation and screening: the breeding range of the hatched seedlings is properly widened, then the seedling feed is dissolved in water and is guided into the water for feeding, a proper amount of white light irradiation is provided, and the seedlings with different volumes are screened and separately bred after 10-20 days.
2. The artificial breeding and seedling raising method for pelteobagrus fulvidraco according to claim 1, which is characterized in that: in the step (1), the pelteobagrus fulvidraco in the same period is bred in the postnatal period for 5-6 months, the weight of the pelteobagrus fulvidraco is 80-100g, the feed is prepared by boiling sweet potatoes, mashing and mixing the cooked sweet potatoes and bananas, adding shrimp shell powder, sweet potato stem leaves, corns and glucose, completely crushing, mixing, airing and crushing again.
3. The artificial breeding and seedling raising method for pelteobagrus fulvidraco according to claim 2, which is characterized in that: the feed comprises, by weight, 80-120 parts of sweet potatoes, 10-50 parts of bananas, 20-60 parts of shrimp shell powder, 70-100 parts of sweet potato stems and leaves, 30-40 parts of corns and 1-3 parts of glucose.
4. The artificial breeding and seedling raising method for pelteobagrus fulvidraco according to claim 1, which is characterized in that: in the step (2), the white light irradiation is carried out for 1-3h by using 80-120Lx white light irradiation, the oxytocin is chorionic gonadotropin, the addition amount is 0.05-0.5 percent of the mass of the feed, and the ovulation promoting agent is added into the feed for feeding after the addition of the oxytocin is stopped.
5. The artificial breeding and seedling raising method for pelteobagrus fulvidraco according to claim 4, which is characterized in that: the ovulation promoting agent is prepared by extracting 10-12 parts of semen cuscutae, 6-8 parts of ramie root, 11-13 parts of lotus petiole and 5-7 parts of folium artemisiae argyi with alcohol, concentrating into extract, adding 0.1-1 part of luteinizing releasing hormone, adding 50-100 parts of corn flour, uniformly mixing, airing and crushing.
6. The artificial breeding and seedling raising method for pelteobagrus fulvidraco according to claim 1, which is characterized in that: in the step (3), the temperature of the water in the water tank is 25-28 ℃, the oviposition agent is a plant oviposition agent, and the fermentation liquor is diluted and poured into the water tank after the fermentation of plant leaves.
7. The artificial breeding and seedling raising method for pelteobagrus fulvidraco according to claim 6, which is characterized in that: the plant leaves are olive leaves.
8. The artificial breeding and seedling raising method for pelteobagrus fulvidraco according to claim 1, which is characterized in that: in the step (4), the water temperature is adjusted to 20-23 ℃, the pH value of the water is adjusted to 6-7, and the fertilized eggs are slowly stirred while pumping oxygen to break membranes and separate as soon as possible.
9. The artificial breeding and seedling raising method for pelteobagrus fulvidraco according to claim 1, which is characterized in that: in the step (5), the white light irradiation is performed for 1 to 3 hours by using white light irradiation of 50 to 80Lx, and the irradiation is continued after the white light irradiation is extinguished for 4 to 8 hours.
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