CN113197130A - Ecological breeding and fry breeding method for pelteobagrus fulvidraco - Google Patents
Ecological breeding and fry breeding method for pelteobagrus fulvidraco Download PDFInfo
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- CN113197130A CN113197130A CN202110643145.3A CN202110643145A CN113197130A CN 113197130 A CN113197130 A CN 113197130A CN 202110643145 A CN202110643145 A CN 202110643145A CN 113197130 A CN113197130 A CN 113197130A
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K61/00—Culture of aquatic animals
- A01K61/10—Culture of aquatic animals of fish
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
Abstract
The invention discloses a pelteobagrus fulvidraco ecological breeding and fry breeding method, which belongs to the technical field of pelteobagrus fulvidraco breeding and comprises the following steps: s1: heating shallow water, and stimulating the gonad development of the parent pelteobagrus fulvidraco through fresh water; s2: inducing reproduction, namely putting small fish nests around the pond to induce male and female mating reproduction of the pelteobagrus fulvidraco; s3: and removing unfertilized fish eggs, shaking the fish nests attached with the fish eggs in the horizontal direction in water, and removing the unfertilized fish eggs. The method comprises the steps of raising the temperature of shallow water in a parent fish pond, injecting new water to stimulate gonad development of parent pelteobagrus fulvidraco, promoting the concentration of the ovulation periods of the parent fish, improving the ovulation rate, putting small fish nests to induce male and female mating propagation, removing unfertilized fish eggs, setting a pelteobagrus fulvidraco fry perching bed, improving the breeding survival rate of pelteobagrus fulvidraco fries in the pond, and enabling the breeding survival rate of the pelteobagrus fulvidraco fries to reach more than 70%.
Description
Technical Field
The invention relates to the technical field of ecological breeding and fry breeding of pelteobagrus fulvidraco, in particular to an ecological breeding and fry breeding method of pelteobagrus fulvidraco.
Background
The pelteobagrus fulvidraco has strong adaptability and wide distribution, can survive in rivers, lakes, ditches and ponds, is fond of inhabiting in slow-flow water bodies and living in camp benthic zones, and is tender in meat quality, delicious in meat flavor and popular with consumers with few intersomatic bones. Every 100g of the edible part of the pelteobagrus fulvidraco contains 16.1g of protein, 2.1g of fat, 2.3g of carbohydrate, 154mg of calcium and 504mg of phosphorus, contains various amino acids necessary for human bodies, particularly has higher contents of glutamic acid and lysine, is medically called that the pelteobagrus fulvidraco has the curative effects of diminishing inflammation, easing pain and the like, has higher growth speed, can reach sexual maturity at 1 winter age and is a good breeding object with relatively high food habits, wherein high-quality seedlings are the germplasm basis for breeding the pelteobagrus fulvidraco, how to breed high-quality pelteobagrus fulvidraco seedlings and improving the seedling breeding survival rate are the problems which are urgently needed to be solved at present.
Disclosure of Invention
The invention aims to provide a pelteobagrus fulvidraco ecological breeding and fry breeding method, which comprises the steps of heating shallow water in a parent fish pond, injecting new water to stimulate gonad development of pelteobagrus fulvidraco parents, promoting the concentration of the ovulatory period of the parents, improving the ovulation rate, putting small fish nests to induce male and female mating breeding, removing unfertilized fish eggs, arranging a pelteobagrus fulvidraco fry perching bed, improving the breeding survival rate of pelteobagrus fulvidraco fries in the pond, and enabling the breeding survival rate of the pelteobagrus fulvidraco fries to reach more than 70%, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a pelteobagrus fulvidraco ecological breeding and fry breeding method comprises the following steps:
s1: heating shallow water, checking the parent gonad development condition in spring in 4 months, and stimulating the gonad development of the parent pelteobagrus fulvidraco through fresh water if the gonad development condition reaches the fourth stage;
s2: inducing reproduction, namely putting small fish nests around the pond to induce male and female mating reproduction of the pelteobagrus fulvidraco, and putting 50-70 fish nests in each mu of pond;
s3: removing unfertilized fish eggs, shaking fish nests attached with the fish eggs in the horizontal direction in water after pelteobagrus fulvidraco groups heat and lay eggs, removing unfertilized fish eggs and moving the fish nests attached with the fertilized eggs to the indoor for hatching;
s4: carrying out concentrated domestication and feeding, wherein flatly swimming fries are incubated in a concentrated manner indoors, and after the yolk sacs of the fries are absorbed, feeding open powdery feed and carrying out concentrated domestication and feeding training to enable the fries to adapt to concentrated feeding;
s5: removing enemies, transferring the indoor cultured fish fries after flat swimming to a pond for culturing, pulling the net empty for 3 times by using net tools with different specifications before putting in, and removing the enemies of the yellow catfish fries;
s6: arranging a perching bed, and fixing a polyethylene mesh sheet with the specification of 30 meshes on the side of the pond to form a pelteobagrus fulvidraco fry perching bed;
s7: feeding the fries, wherein the fries enter a pond cultivation stage, the hard thorns of the yellow catfishes begin to grow, and the fries are prevented from being damaged by mutual collision by adopting large-area bait casting of a small unmanned aerial vehicle.
Further, the shallow water heating comprises the following steps:
s101: in 4 months of spring, catching parents in a yellow catfish feeding area by using a table net, checking the gonad development condition of the parents, and if the gonad development reaches the fourth stage, performing the following operations;
s102: reducing the water level of the pond to 50-60 cm at a ratio of 10: 30-16: 30 in sunny days, and raising the temperature by utilizing solar illumination and stimulating the parent gonad development;
s103: 17: 30-18: 30, adding 10-20 cm of fresh water to stimulate gonad development of parent pelteobagrus fulvidraco;
s104: and repeating the operations of S102 and S103 for 8-12 days.
Further, the fish nest composition in induced breeding is as follows: 0.2kg of palm slices, 0.1kg of willow whiskers, 0.2kg of barley straws with ears, 0.1kg of maple branches, and the fish nest is formed by bundling the components together by palm ropes.
Further, the method for removing unfertilized fish eggs comprises the following steps:
s301: observing the oestrous and oviposition conditions of pelteobagrus fulvidraco groups after the fish nests are thrown for 7 days;
s302: observing the pelteobagrus fulvidraco group to heat and lay eggs, checking the attachment condition of fertilized eggs of a fish nest every day, shaking the fish nest attached with the fish eggs in the water for 20-30 times along the horizontal direction, wherein the shaking frequency of the fish nest is about 30 times per minute, and removing unfertilized fish eggs;
s303: after the shaking fish nest has no fish eggs to fall off, the fish nest with the fertilized eggs is moved to the indoor for hatching.
Further, the hollow net of the harmful living things is removed for 3 times, the hollow net of the bottom trawl net with the mesh of 3cm is used for removing the harmful living things with larger body size for the first time, the hollow net of the bottom trawl net with the mesh of 1cm is used for removing the harmful living things with smaller body size for the second time, and the hollow net of the bottom trawl net with the mesh of 1cm is used for the third time to confirm that the harmful living things are completely removed.
Furthermore, the length of the inhabitation bed in the inhabitation bed is 8m, the width of the inhabitation bed is 3m, the distance between the upper part of the inhabitation bed and the water surface is 40-50cm, the distance between the bottom of the inhabitation bed and the bottom of the pond is 20-30cm, and 10-12 inhabitation beds are arranged in each mu of pond.
Further, a bird prevention net with the area 3 times that of the perch is arranged at the position 2m above the perch in the perch bed.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the pelteobagrus fulvidraco ecological breeding and fry breeding method provided by the invention, the temperature of shallow water in a parent fish pond is raised, new water is injected to stimulate the gonad development of pelteobagrus fulvidraco parents, the concentration of the ovulatory period of the parent fish is promoted, the ovulation rate is improved, small fish nests are put in to induce male and female mating breeding, and the saprolegniasis can be prevented by self-making the fish nests.
2. According to the method for ecological breeding and fry breeding of the pelteobagrus fulvidraco, provided by the invention, fish nests attached with fish eggs can be shaken in water, unfertilized fish eggs are removed, the screening operation is convenient, and the hatchability of the fish eggs is improved.
3. According to the method for ecological breeding and fry breeding of the pelteobagrus fulvidraco, the pelteobagrus fulvidraco fry perching bed is arranged at the side of the fry pond, so that the fed fries are all allowed to perch on the perching bed, the problem that the pelteobagrus fulvidraco fry which is full of food gathers at the bottom of the pond and dies greatly due to poor water quality at the bottom can be solved, the breeding survival rate of the pelteobagrus fulvidraco fries in the pond is remarkably improved, the large-area bait throwing by the unmanned aerial vehicle is utilized to prevent the fries from being damaged mutually, and the breeding survival rate of the pelteobagrus fulvidraco fries can reach more than 70%.
Drawings
Fig. 1 is a flow chart of the method for ecological breeding and fry rearing of pelteobagrus fulvidraco of the invention;
fig. 2 is a flow chart of shallow water temperature rise in the method for ecological breeding and fry rearing of pelteobagrus fulvidraco of the invention;
fig. 3 is a flow chart of the method for removing unfertilized fish eggs in the method for ecologically breeding and cultivating the pelteobagrus fulvidraco.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a pelteobagrus fulvidraco ecological breeding and fry rearing method comprises the following steps:
s1: heating shallow water, checking the parent gonad development condition in spring in 4 months, and stimulating the gonad development of the parent pelteobagrus fulvidraco through fresh water if the gonad development condition reaches the fourth stage;
s2: inducing reproduction, namely putting small fish nests around the pond to induce male and female mating reproduction of the pelteobagrus fulvidraco, and putting 50-70 fish nests in each mu of pond; wherein, the fish nest composition comprises the following components: 0.2kg of palm slices, 0.1kg of willow whiskers, 0.2kg of barley straws with ears and 0.1kg of maple branches, wherein the fish nest is formed by bundling the components together by palm ropes, and the fish nest formed by the materials can attract pelteobagrus fulvidraco to mate and lay eggs and can prevent saprolegniasis of fertilized eggs;
s3: removing unfertilized fish eggs, shaking fish nests attached with the fish eggs in the horizontal direction in water after pelteobagrus fulvidraco groups heat and lay eggs, removing unfertilized fish eggs and moving the fish nests attached with the fertilized eggs to the indoor for hatching;
s4: carrying out concentrated domestication and feeding, wherein flatly swimming fries are incubated in a concentrated manner indoors, and after the yolk sacs of the fries are absorbed, feeding open powdery feed and carrying out concentrated domestication and feeding training to enable the fries to adapt to concentrated feeding; the cultivation survival rate after entering the pond is improved;
s5: removing enemies, transferring the indoor cultured fish fries after flat swimming to a pond for culturing, pulling the net empty for 3 times by using net tools with different specifications before putting in, and removing the enemies of the yellow catfish fries; in the 3 times of pulling the empty net, pulling the empty net by using a bottom-dragging net with meshes of 3cm for the first time to eliminate large harmful insects, pulling the empty net by using a bottom-dragging net with meshes of 1cm for the second time to eliminate small harmful insects, and pulling the empty net by using a bottom-dragging net with meshes of 1cm for the third time to confirm that harmful organisms are completely eliminated, so that an environment without harmful organisms is created for the pelteobagrus fulvidraco fry;
s6: arranging a perching bed, and fixing a polyethylene mesh sheet with the specification of 30 meshes on the side of the pond to form a pelteobagrus fulvidraco fry perching bed; the length of the perching bed is 8m, the width of the perching bed is 3m, the distance between the upper part of the perching bed and the water surface is 40-50cm, the distance between the bottom of the perching bed and the bottom of the perching bed is 20-30cm, 10-12 perching beds are arranged in each mu of pond, and an anti-bird net with the area 3 times that of the perching bed is arranged at the position 2m above the perching bed; the fed fish fries are all allowed to have an opportunity to inhabit on the inhabitation bed, the problem that the fed pelteobagrus fulvidraco fries gather at the bottom of the pond and die due to poor water quality at the bottom can be solved, and the breeding survival rate of the pelteobagrus fulvidraco fries in the pond is remarkably improved;
s7: the seedling is thrown something and feeds, and the seedling gets into the pond stage of cultivating, and the hard spine of yellow catfish begins to develop, if throw something and feed in a concentrated way, the seedling is easy to collide mutually the injury when concentrated ingestion, takes unmanned aerial vehicle large tracts of land to throw bait to prevent that the seedling from damaging mutually in this embodiment.
Referring to fig. 2, shallow water warming includes the following steps:
s101: in 4 months of spring, catching parents in a yellow catfish feeding area by using a table net, checking the gonad development condition of the parents, and if the gonad development reaches the fourth stage, performing the following operations;
s102: reducing the water level of the pond to 50-60 cm at a ratio of 10: 30-16: 30 in sunny days, and raising the temperature by utilizing solar illumination and stimulating the parent gonad development;
s103: 17: 30-18: 30, adding 10-20 cm of fresh water to stimulate gonad development of parent pelteobagrus fulvidraco;
s104: and repeating the operations of S102 and S103 for 8-12 days.
Referring to fig. 3, the removal of unfertilized fish eggs comprises the following steps:
s301: observing the oestrous and oviposition conditions of pelteobagrus fulvidraco groups after the fish nests are thrown for 7 days;
s302: observing the pelteobagrus fulvidraco group to heat and lay eggs, checking the attachment condition of fertilized eggs of a fish nest every day, shaking the fish nest attached with the fish eggs in the water for 20-30 times along the horizontal direction, wherein the shaking frequency of the fish nest is about 30 times per minute, and removing unfertilized fish eggs;
s303: after the fish nest is shaken and no fish eggs fall off, the fish nest with the fertilized eggs is moved to the indoor for hatching; the movable fish nest is immersed into water through the basin to scoop up the whole fish nest, and the movable fish nest attached with fertilized eggs and part of pond water move together, so that the damage to the fish eggs in the moving process is reduced.
The method for ecological breeding and fry rearing of the pelteobagrus fulvidraco in the embodiment is adopted to carry out the following operations:
examination of gonadal development prior to stimulation of gonadal development: capturing 120 parents in a yellow catfish feeding area by using a table net in spring 4-20 days in 2018 to 2020, checking the gonad development condition, and obtaining the following data shown in a table 1:
table 12018 years to 2020 4 months and 20 days capturing gonad development condition of parent of pelteobagrus fulvidraco
Among the 120 parents, the gonads of the parents with more than 110 parents are in a mature period (stage four), the volume and the weight of the ovary reach the maximum in the period, egg yolk is filled in egg granules, the egg yolk is gradually fused, the egg granules are easy to fall off from the fold of the ovary, and an ovary mould is very thin; the gonads of 2-5 parents in 120 parents develop into three stages, the volume of the parent ovaries in the period is gradually increased, egg grains of accumulated yolk can be seen clearly by naked eyes, but the egg grains are not large enough and round enough, and cannot be separated and peeled from the ovary folds.
Examination of gonadal development after stimulation of gonadal development: selecting sunny days from 21 days to 10 days in 4 months to 5 months in spring from 2018 to 2020, reducing the water level of the pond to 50cm at 10: 30-16: 30, adding fresh water at 17: 30-18: 30 for 15cm, repeating the operation for 11 days to complete the stimulation of gonad development, capturing 120 parents with a table net in a yellow catfish feeding area after the stimulation of gonad development, and checking the gonad development condition to obtain the following data table 2:
table 22018 to 2020, 5 and 10 months captures gonad development condition of parent pelteobagrus fulvidraco
Wherein, the gonads of more than 115 parents among the 120 parents reach the oviposition period (stage five), the ovary in the period is completely mature and is in a soft state, the egg grains fall from the folds of the ovary and are discharged into the ovary cavity or the abdominal cavity, and the born eggs are discharged by lifting the parent fish or slightly pressing the abdomen; the gonads of 2-3 parents in 120 parents develop into a mature period, and 0-2 parents are in an egg laying finishing state and are ovaries which have laid eggs.
Mating and breeding: putting small fish nests around the pond to induce male and female mating breeding of the pelteobagrus fulvidraco, putting 66 fish nests in each mu of pond, wherein each fish nest consists of 0.2kg of palm slices, 0.1kg of willow whiskers, 0.2kg of barley straws with ears and 0.1kg of maple branches, bundling the fish nests together by using palm ropes, after putting the fish nests for 7 days, discovering pelteobagrus fulvidraco groups to estrant and lay eggs, checking the attachment condition of fertilized eggs of the fish nests every day, shaking the fish nests with the adhered eggs in the water for 28 times along the horizontal direction, wherein the frequency of shaking the fish nests is 30 times per minute, then transferring the fish nests with the adhered fertilized eggs to the indoor for hatching, and after the yolk sacs of the hatched fish fries are absorbed, putting open powdery feed and carrying out concentrated feeding training;
setting a pond: removing the enemies of pelteobagrus fulvidraco seedlings in the pond during mating breeding, fixing the pelteobagrus fulvidraco seedlings at the side of the pond by using polyethylene net pieces with the specification of 30 meshes, wherein the length of a perching bed is 8m and the width of the perching bed is 3m, the upper part of the perching bed is 45cm away from the water surface, the bottom of the perching bed is 25cm away from the bottom of the pond, 12 pelteobagrus fulvidraco seedling perching beds are arranged in each mu of pond, bird prevention nets with the area 3 times that of the perching bed are arranged at the position 2m above the perching bed, putting the seedlings after concentrated domestication training into the pond, and adopting a small unmanned plane to throw bait in a large area; the fish egg quantity is counted before the fertilized egg fish nest is moved to indoor incubation, then the fish fry quantity after 15 days of pond investment is counted, the yellow catfish fry breeding survival rate is obtained through calculation, and the obtained data are as shown in the following table 3.
Table 32018 to 2020 yellow catfish fry breeding survival rate data statistics
Through statistics, in the cultivation of the pelteobagrus fulvidraco fingerlings from 2018 to 2020, by taking cultivation measures of shaking off unfertilized fish eggs, indoor incubation, concentrated domestication training, large-area bait feeding by an unmanned aerial vehicle and the like, the fish eggs without incubation possibility can be eliminated, the quality of the fish eggs is improved, and the survival rate of the cultivation of the fish fries reaches more than 70%.
In summary, the following steps: according to the pelteobagrus fulvidraco ecological breeding and fry breeding method provided by the invention, the temperature of shallow water in a parent fish pond is raised, new water is injected to stimulate the gonad development of pelteobagrus fulvidraco parents, the concentration of the ovulatory period of the parent fish is promoted, the ovulation rate is improved, small fish nests are put in to induce male and female mating breeding, and the saprolegniasis can be prevented by self-making the fish nests; the fish nests attached with the fish eggs can be shaken in water to remove unfertilized fish eggs, the screening operation is convenient, and the hatchability of the fish eggs is improved; the pelteobagrus fulvidraco fry perching bed is arranged on the side of the fry pond, so that the fish fries after being fed have an opportunity to perch on the perching bed, the problem that the pelteobagrus fulvidraco fries which are full of food gather at the bottom of the pond and die greatly due to poor water quality at the bottom can be solved, the cultivation survival rate of the pelteobagrus fulvidraco fries in the pond is remarkably improved, the large-area bait throwing of the unmanned aerial vehicle is utilized to prevent the fries from being damaged mutually, and the cultivation survival rate of the pelteobagrus fulvidraco fries can reach more than 70%.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (7)
1. A pelteobagrus fulvidraco ecological breeding and fry breeding method is characterized by comprising the following steps:
s1: heating shallow water, checking the parent gonad development condition in spring in 4 months, and stimulating the gonad development of the parent pelteobagrus fulvidraco through fresh water if the gonad development condition reaches the fourth stage;
s2: inducing reproduction, namely putting small fish nests around the pond to induce male and female mating reproduction of the pelteobagrus fulvidraco, and putting 50-70 fish nests in each mu of pond;
s3: removing unfertilized fish eggs, shaking fish nests attached with the fish eggs in the horizontal direction in water after pelteobagrus fulvidraco groups heat and lay eggs, removing unfertilized fish eggs and moving the fish nests attached with the fertilized eggs to the indoor for hatching;
s4: carrying out concentrated domestication and feeding, wherein flatly swimming fries are incubated in a concentrated manner indoors, and after the yolk sacs of the fries are absorbed, feeding open powdery feed and carrying out concentrated domestication and feeding training to enable the fries to adapt to concentrated feeding;
s5: removing enemies, transferring the indoor cultured fish fries after flat swimming to a pond for culturing, pulling the net empty for 3 times by using net tools with different specifications before putting in, and removing the enemies of the yellow catfish fries;
s6: arranging a perching bed, and fixing a polyethylene mesh sheet with the specification of 30 meshes on the side of the pond to form a pelteobagrus fulvidraco fry perching bed;
s7: feeding the fries, wherein the fries enter a pond cultivation stage, the hard thorns of the yellow catfishes begin to grow, and the fries are prevented from being damaged by mutual collision by adopting large-area bait casting of a small unmanned aerial vehicle.
2. The pelteobagrus fulvidraco ecological breeding and offspring seed rearing method according to claim 1, wherein the shallow water temperature rise comprises the following steps:
s101: in 4 months of spring, catching parents in a yellow catfish feeding area by using a table net, checking the gonad development condition of the parents, and if the gonad development reaches the fourth stage, performing the following operations;
s102: reducing the water level of the pond to 50-60 cm at a ratio of 10: 30-16: 30 in sunny days, and raising the temperature by utilizing solar illumination and stimulating the parent gonad development;
s103: 17: 30-18: 30, adding 10-20 cm of fresh water to stimulate gonad development of parent pelteobagrus fulvidraco;
s104: and repeating the operations of S102 and S103 for 8-12 days.
3. The method for ecological breeding and fry rearing of pelteobagrus fulvidraco according to claim 1, wherein the fish nest components in the induced breeding are as follows: 0.2kg of palm slices, 0.1kg of willow whiskers, 0.2kg of barley straws with ears, 0.1kg of maple branches, and the fish nest is formed by bundling the components together by palm ropes.
4. The pelteobagrus fulvidraco ecological breeding and offspring seed rearing method according to claim 1, wherein the step of rejecting unfertilized fish eggs comprises the following steps:
s301: observing the oestrous and oviposition conditions of pelteobagrus fulvidraco groups after the fish nests are thrown for 7 days;
s302: observing the pelteobagrus fulvidraco group to heat and lay eggs, checking the attachment condition of fertilized eggs of a fish nest every day, shaking the fish nest attached with the fish eggs in the water for 20-30 times along the horizontal direction, wherein the shaking frequency of the fish nest is about 30 times per minute, and removing unfertilized fish eggs;
s303: after the shaking fish nest has no fish eggs to fall off, the fish nest with the fertilized eggs is moved to the indoor for hatching.
5. The method for ecological breeding and fry breeding of pelteobagrus fulvidraco according to claim 1, wherein the pulling of the empty net in the enemy is eliminated for 3 times, the pulling of the empty net with a net mesh of 3cm is used for the first time to eliminate the enemy with a larger body type, the pulling of the empty net with a net mesh of 1cm is used for the second time to eliminate the enemy with a smaller body type, and the pulling of the empty net with a net mesh of 1cm is used for the third time to confirm that the harmful organisms are completely eliminated.
6. The method for ecological breeding and seedling cultivation of pelteobagrus fulvidraco according to claim 1, wherein the length and width of a perching bed in the perching bed are 8m and 3m, the upper part of the perching bed is 40-50cm away from the water surface, the bottom of the perching bed is 20-30cm away from the bottom of the pond, and 10-12 perching beds are arranged in each mu of pond.
7. The method for ecological breeding and fry breeding of pelteobagrus fulvidraco according to claim 1, wherein a bird prevention net with an area 3 times that of the perch is arranged at a position 2m above the perch in the perch bed.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114223588A (en) * | 2021-12-17 | 2022-03-25 | 水利部中国科学院水工程生态研究所 | Reservoir ecological scheduling method for guaranteeing hatching of grass-sticking fish eggs in reservoir area |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114223588A (en) * | 2021-12-17 | 2022-03-25 | 水利部中国科学院水工程生态研究所 | Reservoir ecological scheduling method for guaranteeing hatching of grass-sticking fish eggs in reservoir area |
| CN114223588B (en) * | 2021-12-17 | 2022-11-15 | 水利部中国科学院水工程生态研究所 | Reservoir ecological scheduling method for guaranteeing hatching of grass-sticking fish eggs in reservoir area |
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