Crayfish breeding device and its application

Abstract

The invention discloses a crayfish breeding device and its application. The device comprises a breeding pool, wherein the bottom of the pool is divided into two steps with a height difference, a far-infrared lamp is arranged above the pool body and an external water storage tank is connected; an auxiliary plate is arranged above the lower step in the breeding pool, and a nest plate is arranged above the higher step, and the plates and the pool wall are sealed and connected by soft rubber strips; the nest plate comprises a folding plate and an artificial breeding nest, wherein the folding plate is a Z-shaped wave plate, and the wave surface is divided into a long wave surface and a short wave surface perpendicular to each other, and circular holes are evenly arranged on the upper edge of the long wave surface, and the artificial breeding nest is placed in the circular hole. Compared with the prior art, the advantages are: (1) the device increases the amount of parent shrimps stocked per unit area of ​​the breeding pond, reduces the accumulated temperature required for the development of the parent shrimps' gonads, and provides a safe and high-quality environment for the incubation of female shrimps with seeds; (2) the application of the device greatly improves the parent shrimps' seed holding rate and the survival rate of seed shrimps, shortens the breeding cycle of batch parent shrimps, and improves the uniformity of the specifications of young shrimps.

Description

Technical Field

[0001] The invention belongs to the technical field of agricultural application, and relates to a method for breeding and cultivating crayfish, in particular to a crayfish breeding device and application thereof. Background Art

[0002] In the prior art, the breeding of crayfish mainly adopts two methods: natural breeding and artificial breeding. Natural breeding is mainly in shrimp ponds. Since crayfish have the habit of digging holes, it is difficult to catch them all. A certain number of seedlings are produced by natural breeding during the breeding season, and then artificial fishing and breeding are carried out, or the shrimp seedlings are left in the pond for breeding. The natural breeding method is that it is impossible to control the number of broodstock (too much or too little will affect the emergence rate of shrimp seedlings), resulting in a small number of shrimp seedlings, many batches, and uneven specifications, resulting in a reduced breeding survival rate. In the prior art, natural breeding in a new pond is from March to April each year or from September to October of the previous year. In a pond where lobsters are not cultured, aquatic plants are cleaned, disinfected, fertilized, and planted, and water is injected for about 1 meter, and then 18-20kg of selected lobster broodstock are placed per mu, with a male-female ratio of 3:1. After the broodstock is placed, the pool water is slowly drained to keep the pool water depth at 0.4-0.6 meters so that the lobster broodstock can dig holes into the caves for breeding. Although this method can control the number of broodstock per unit area and the sex ratio, it still relies on natural conditions, has many uncontrollable factors, and has a low seedling production rate.

[0003] Artificial propagation methods include semi-artificial propagation and fully artificial propagation. Compared with natural propagation, semi-artificial propagation includes cleaning, disinfection, fertilization, planting of aquatic plants and intensive feeding of parents in shrimp ponds, but it still relies on parent shrimps to dig holes, mate and lay eggs, hatch naturally, and catch seedlings in batches. Therefore, in the process of shrimp reproduction, it is still affected and restricted by natural conditions. Fully artificial propagation is that all lobsters are carried out in indoor cement pools. A large number of artificial nests are set up at the bottom of the cement pool to cover the entire bottom of the pool. A small amount of submerged plants and water hyacinths are transplanted, and sufficient dissolved oxygen is maintained. Generally, 30-40 parent shrimps are placed per square meter, and the male-female ratio is 2:1. Feed once a day, mainly animal bait, supplemented by aquatic plants. By controlling light, water temperature, water quality, and water level, parent shrimps are induced to enter holes, mate, and lay eggs. Then the shrimps with eggs are moved to the hatching pond for centralized hatching. At present, among the three methods, the fully artificial breeding method has the highest seedling production rate. Since crayfish like to be fertilized and lay eggs at the junction of water and air, the existing fully artificial breeding still cannot overcome the mating and fertilization in the water. The artificial nest is at the bottom of the pond. After a period of breeding, it will accumulate dirt, resulting in poor water quality, low dissolved oxygen, and deteriorating breeding conditions. In addition, since the artificial nest is open, it will be disturbed by other broodstock during mating and fertilization, resulting in a lower mating rate. Catching shrimp is also more difficult because male shrimps and female shrimps with eggs are mixed together and need to be sorted, which will cause harm to the broodstock. In addition, broodstock come from natural water bodies such as lakes and artificial breeding ponds. The development of parent gonads is greatly affected by environmental factors. Generally, the gonad development of female shrimps is only about 10%. In the later stage, it takes a long time to cultivate before mating and laying eggs, which makes the breeding cycle of crayfish too long. Summary of the invention

[0004] Technical problem to be solved: In order to overcome the shortcomings of the prior art, improve the mating rate of crayfish broodstock and the fertilization rate of female shrimps, and thereby increase the number of fry produced per unit body weight of broodstock; the present invention is based on the idea of ​​synchronizing the development stage of broodstock, accelerating gonad development, shortening the breeding cycle, protecting from external environmental interference, increasing the fertilization rate of female shrimps, and optimizing cultivation and breeding conditions, and provides a crayfish breeding device and its application that can integrate broodstock breeding and fertilized female shrimp cultivation.

[0005] Technical solution: A crayfish breeding device, the device comprises a breeding pool, the bottom of the pool is divided into two steps with a height difference, a far-infrared lamp is arranged above the pool body and an external water reservoir is connected; an auxiliary plate is arranged above the lower step in the breeding pool, and a nest plate is arranged above the higher step, and the plates and the plates and the pool wall are sealed and connected by soft rubber strips; the nest plate comprises a folding plate and an artificial breeding nest, the folding plate is a Z-shaped wave plate, the wave surface is divided into a long wave surface and a short wave surface perpendicular to each other, circular holes are evenly opened on the upper edge of the long wave surface, and the artificial breeding nest is placed in the circular hole; wherein, the artificial breeding nest is a cylindrical structure, including a mouth cover, a cylinder and a hemispherical bottom from top to bottom, the mouth cover and the hemispherical bottom are both made of buoyant materials, and are both connected to the cylinder through movable joints; a fogger is arranged in the water reservoir, the fogger is connected to the spray pipe above the breeding pool, the water reservoir is connected to a water inlet, and a drainage outlet is opened on the lower step in the breeding pool.

[0006] Preferably, the breeding pool is a cement pool with a depth of 95-105 cm; in the breeding pool, the nest plate is 25-35 cm higher than the auxiliary plate.

[0007] Preferably, the angle between the long wave plane and the horizontal plane is 20-30°.

[0008] Preferably, the diameter of the circular hole is 1 / 2-2 / 3 of the width of the long wave surface.

[0009] Preferably, the two movable joints are symmetrical about the center of the cylindrical body of the barrel.

[0010] Preferably, the folding plate is fixed by a frame, and legs are provided below the folding plate, which are 45-55 cm higher than the pool bottom; the auxiliary plate is fixed in the same way as the folding plate and is flush with the folding plate, and a net is provided below the auxiliary plate.

[0011] Preferably, the device is covered with a greenhouse.

[0012] Preferably, the cross section of the soft rubber strip is elliptical, the two focal points are circular cavities, the circular cavity forms notches outward along the long axis, and the rest is a solid part.

[0013] Furthermore, in the breeding pond and the water storage tank in the device, oxygenation and temperature control devices are arranged according to conventional designs.

[0014] The application of any of the above crayfish breeding devices in the cultivation of parent shrimps, mating of parent shrimps, and cultivation of spawning female shrimps.

[0015] Preferably, the application comprises the following steps:

[0016] S1. Stocking of broodstock

[0017] Add water to the breeding pool until the water surface covers the lower edge of the circular hole, so that the lower edge of the artificial breeding nest is underwater, and the mouth cover is in a closed state; place the broodstock on the nest board, the number of female broodstock is 1-1.5 times the number of artificial breeding nests, and the ratio of female broodstock to male broodstock is 1:2-3; leave it to stand until the broodstock are evenly distributed on the nest board, and wait for ripening and cultivation;

[0018] S2. Cultivation of broodstock

[0019] Turn on the far-infrared lamp for 6 hours a day, and raise the temperature by 1-2°C. At the same time, turn on the fog maker and feed pellet feed once a day in small amounts in batches until the animals stop eating.

[0020] S3. Change water

[0021] Change the water once every 2-3 days. The amount of water added is the height of the water layer where the artificial breeding nest is located multiplied by the bottom area of ​​the breeding pool. The specific method of changing the water is as follows: use the overflow pipe method, adjust the overflow port to the edge of the cover, and maintain the water volume so that the cover opens a small gap. The water source flows in from the top of the nest board, flows into the artificial breeding nest from the small gap of the cover, and then flows out from the hollow part of the tube to the bottom of the nest board until it is discharged from the drain port.

[0022] S4. Mating and reproduction

[0023] Repeat S3 and S4 until the light yellow ovary in the female shrimp head turns darker, stop ripening, and carry out mating and reproduction. The specific method is: add water to the breeding pool to make the mouth cover completely open, and the male and female broodstock enter the artificial breeding nest in pairs to mate. After mating, the male shrimp leaves the nest to mate with other female shrimps again or stay on the nest board; after mating in the artificial breeding nest, open the auxiliary board and lower the water level of the breeding pool until the mouth cover is completely closed;

[0024] At this time, the female shrimps with eggs remain at the bottom of the artificial breeding nest, forming a relatively closed and transparent incubation environment in the nest; the auxiliary board is removed, and as the water level drops, the parent shrimps left on the nest board enter the net and are collected; the female shrimps with eggs continue to be cultivated in the nest or collected in a special pond for cultivation;

[0025] S5. Cultivation of female shrimp with eggs

[0026] Collect and cultivate in a special pond. The method is: drain the water in the breeding pond until the water level drops below the bottom of the hemispherical surface, that is, the bottom of the hemispherical surface is completely opened, and the female shrimps with eggs slip out of the nest and flow into the net under the auxiliary plate. After being collected, they are cultivated in a special pond;

[0027] Continue to cultivate in the nest, the method is: adjust the water level of the breeding pond, control the water temperature and feed according to the living habits of the female shrimps with eggs; deepen the water level of the breeding pond so that the mouth cover opens, and the female shrimps with eggs go out of the nest to find food. During this period, feed and fresh aquatic plants are added, and microbial preparations are used to fertilize the water quality to provide food for the seed shrimps; after the seed shrimps become juvenile shrimps and leave the mother, remove the auxiliary plates, lower the water level, and allow the female shrimps and juvenile shrimps to enter the net with the water flow.

[0028] The design idea and application principle of the crayfish breeding device of the present invention are as follows: first, the device combines the advantages of natural breeding and artificial breeding in the structural design. Specifically, the floating materials at both ends of the artificial breeding nest are designed to be connected so that the mouth cover and the hemispherical bottom can be opened and closed by adjusting the water level in the pool; further, the wave surface angle of the folding plate is controlled to increase the capacity of the artificial breeding nest per unit area in the breeding pool, and the water-oxygen binding area during the incubation of the female shrimp with seeds is increased. Secondly, the two movable joints of the artificial breeding nest are designed symmetrically along the center of the cylinder, and the movable joint at the mouth cover is rotated to the highest point during the specific use process, and the movable joint at the hemispherical bottom is at the lowest point accordingly, so that the two floating materials can float up quickly when the water level is adjusted, and do not affect the parent shrimp to enter or leave the nest. Thirdly, the device and its application method make full use of the natural burrowing habit of crayfish, and promote the natural separation of crayfish after mating. The design of the high and low levels of the pool bottom combined with the water flow can ensure that the parent shrimp or young shrimp are protected from harm during the collection and separation process. Finally, the device is not limited to being used for mating of parent shrimps, and can be further used for cultivating female shrimps carrying eggs and raising and separating egg shrimps and young shrimps after mating is completed.

[0029] Beneficial effects: (1) The device increases the amount of broodstock stocked per unit area of ​​the breeding pond, reduces the accumulated temperature required for the gonadal development of the broodstock, and provides a safe and high-quality environment for the incubation of spawning female shrimps; (2) The application of the device greatly improves the spawning rate of broodstock and the survival rate of spawning shrimps, shortens the breeding cycle of batches of broodstock, and improves the uniformity of the size of the juvenile shrimps. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of the crayfish breeding device of the present invention;

[0031] Figure 2 It is a structural schematic diagram of the folding plate of the present invention;

[0032] Figure 3 It is a schematic diagram of the structure of the artificial breeding nest of the present invention;

[0033] Figure 4 is a schematic cross-sectional view of the soft rubber strip of the present invention;

[0034] Figure 5 is a schematic diagram of the structure of the soft rubber strip of the present invention;

[0035] Among them, 1 is a breeding pool, 2 is a nest plate, 3 is an auxiliary plate, 4 is a water reservoir, 5 is a fog maker, 6 is a folding plate, 601 is a long slope, 602 is a short slope, 603 is a round hole, 604 is a frame, 605 is a leg, 7 is an artificial breeding nest, 701 is a cover, 702 is a movable joint, 703 is a cylinder, 704 is a hemispherical bottom, 8 is a soft rubber strip, 801 is a solid part, 802 is a round cavity, and 803 is a notch. DETAILED DESCRIPTION

[0036] The following examples further illustrate the content of the present invention, but should not be construed as limiting the present invention. Without departing from the spirit and essence of the present invention, modifications and substitutions made to the method, steps or conditions of the present invention all belong to the scope of the present invention. Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art.

[0037] Example 1

[0038] The crayfish breeding device comprises a breeding pool 1, wherein the pool bottom is divided into two steps with a height difference, a far-infrared lamp 10 is arranged above the pool body and an external water storage tank 4 is connected; an auxiliary plate 3 is arranged above the lower step in the breeding pool 1, and a nest plate 2 is arranged above the higher step, and the plates and the pool wall are sealed and connected by soft rubber strips 8; the nest plate 2 comprises a folding plate 6 and an artificial breeding nest 7, the folding plate 6 is a Z-shaped wave plate, and the wave surface is divided into a long wave surface 601 and a short wave surface 602 perpendicular to each other, and the long wave surface 601 is Circular holes 603 are evenly arranged on the upper edge, and the artificial breeding nest 7 is placed in the circular holes 603; wherein, the artificial breeding nest 7 is a cylindrical structure, including a mouth cover 701, a cylinder 703 and a hemispherical bottom 704 from top to bottom, the mouth cover 701 and the hemispherical bottom 704 are both made of buoyant materials, and are both connected to the cylinder 703 through a movable joint 702; a mist maker 5 is arranged in the water reservoir 4, the mist maker 5 is connected to the spray pipe 9 above the breeding pool 1, the water reservoir 4 is connected to a water inlet, and a drainage outlet is arranged on the lower step in the breeding pool 1.

[0039] The breeding pool 1 is a cement pool with a depth of about 100 cm; in the breeding pool 1, the nest board 2 is higher than the auxiliary board 3 by about 30 cm.

[0040] The angle between the long wave surface 601 and the horizontal plane is 30°.

[0041] The diameter of the circular hole 603 accounts for 2 / 3 of the width of the long-wave surface 601 .

[0042] The two movable joints 702 are symmetrical with respect to the center of the cylinder 703. When the artificial breeding nest 7 is assembled, the movable joint 702 on the cover 701 is placed at the highest point, and the movable joint 702 on the hemispherical bottom 704 is placed at the lowest point.

[0043] The folding plate 6 is fixed by a frame 604, and a leg 605 is provided below the folding plate 6, and the leg 605 is about 50 cm higher than the bottom of the pool; the auxiliary plate 3 is fixed in the same way as the folding plate 6, and is flush with the folding plate 6, and a net is provided below the auxiliary plate 3.

[0044] The device is covered with a canopy 11 .

[0045] The cross section of the soft rubber strip 8 is elliptical, with two foci forming circular cavities 802 , and notches 803 are formed outwardly along the long axis of the circular cavity 802 , and the rest is a solid portion 801 .

[0046] The structural design and parameter range of this embodiment are more suitable for practical applications.

[0047] Example 2

[0048] The difference from Example 1 is that the depth of the breeding pool 1 is 95 cm or 105 cm, the nest plate 2 is 325 cm or 35 cm higher than the auxiliary plate. The angle between the long wave surface 601 and the horizontal plane is 20°. The diameter of the circular hole 603 accounts for 1 / 2 of the width of the long wave surface 601. The leg 605 is 45 cm or 55 cm higher than the pool bottom.

[0049] Example 3

[0050] The device described in Example 1 is actually used in the entire crayfish breeding cycle of broodstock ripening, broodstock mating, and spawning female broodstock. The specific scheme is as follows:

[0051] S1. Stocking of broodstock

[0052] Add water to the breeding pool 1 until the water surface covers the lower edge of the circular hole 603, so that the lower edge of the artificial breeding nest 7 is under water, and the cover 701 is in a closed state; place the broodstock on the nest plate 2, the number of female broodstock is 1-1.5 times the number of artificial breeding nests 7, and the ratio of female broodstock to male broodstock is 1:2-3; leave it to stand until the broodstock are evenly distributed on the nest plate 2, and wait for ripening and cultivation.

[0053] The artificial breeding nest 7 can be made of rattan or a cylinder with a plurality of micropores or small holes on the surface. The cylinder can be selected from a ceramic cylinder or a plastic cylinder according to actual cost or breeding effect. In the breeding process, the inner wall of the cylinder 703 is roughened to facilitate the entry and exit of the parent shrimp or the female shrimp with eggs. As for the cover 701, the material is selected to be buoyant in water. The function of the cover 701 is as follows: when water is continuously added to the nest plate and the water level is higher than the cover 701, the cover 701 is opened by the buoyancy, and when the drain outlet continuously drains water to reduce the water level in the pool to below the cover 701, the cover 701 closes the cylinder mouth due to its own gravity.

[0054] S2. Cultivation of broodstock

[0055] The far infrared lamp 10 is turned on for 6 hours every day, the temperature rises by 1-2°C, and the fog maker 5 is turned on at the same time. The pellet feed is fed once a day in small amounts in batches until the fish no longer eat.

[0056] The ripening and cultivation method can be replaced by the method of the prior art. When drawing on the method of the prior art, the illuminance can be adjusted. Specifically, it can be determined by an illuminance test of infrared shrimp, such as the following method: a plurality of small cups are placed on the nest plate 2, and arranged from near to far with the far-infrared lamp 10 as the center. The water volume and initial temperature in the small cups are the same, a thermometer is placed in each small cup, the illumination time is 6 hours a day, and the illuminance is controlled by increasing the water temperature in the small cup by 1-2°C; at the same time, the distance between the far-infrared lamp 10 and the small cup is adjusted, and the distance is used as the vertical distance between the nest plate 2 and the far-infrared lamp 10.

[0057] The far-infrared lamp 10 and the fog maker 5 are turned on and off at the same time, so that water mist is generated during the irradiation process, which plays the role of heat preservation, moisture retention and oxygenation.

[0058] S3. Change water

[0059] The water is changed once every 2-3 days, and the amount of water added is the height of the water layer where the artificial breeding nest 7 is located multiplied by the bottom area of ​​the breeding pool 1; the specific method of changing water is: using the overflow pipe method, adjust the overflow port to the edge of the mouth cover 701, and maintain the water volume so that the mouth cover 701 opens a small gap. Water flows in from the top of the nest plate 2, flows into the artificial breeding nest 7 from the small gap of the mouth cover 701, and then flows out from the hollow part of the cylinder 703 to the bottom of the nest plate 2, until it is discharged from the drain port.

[0060] S4. Mating and reproduction

[0061] Repeat S3 and S4 until the light yellow ovary in the female shrimp head turns darker, stop ripening, and carry out mating and reproduction. The specific method is as follows: add water to the breeding pool 1 so that the cover 701 is fully opened, and the male and female broodstock enter the artificial breeding nest 7 in pairs for mating. After mating, the male shrimp leaves the nest to mate with other female shrimps again or stays on the nest plate 2; after mating in the artificial breeding nest 7 is completed, open the auxiliary plate 3, and lower the water level of the breeding pool 1 until the cover 701 is fully closed;

[0062] At this time, the female shrimps with eggs remain at the bottom of the artificial breeding nest 7, and a relatively closed and transparent incubation environment is formed in the nest; the auxiliary plate 3 is removed, and as the water level drops, the parent shrimps remaining on the nest plate 2 enter the net and are collected; the female shrimps with eggs continue to be cultivated in the nest or collected and cultivated in a special pond.

[0063] In the actual application process, there will be a small amount of male shrimps that have not left the nest in the artificial breeding nest 7. At this time, there is no need for artificial separation to prevent the parent shrimps from being injured. They can be separated naturally in the subsequent breeding process. Generally, it takes 2-3 days to determine whether the mating in the artificial breeding nest 7 is completed. It can also be seen from the situation that the male shrimps leave the nest that most of the male shrimps leave the nest. In addition, the parent shrimps collected on the nest plate 2 will also have a small amount of female shrimps. According to the physiological characteristics of female shrimps that can reproduce two ages in their lifetime, it is decided whether to use them for the next breeding or to make other treatments.

[0064] S5. Cultivation of female shrimp with eggs

[0065] Collect and cultivate in a special pond, the method is: drain the water in the breeding pond 1 until the water level drops below the hemispherical bottom 704, that is, the hemispherical bottom 704 is fully opened, and the female shrimps with eggs slip out of the nest and enter the net under the auxiliary plate 3 with the water flow, and then collect and cultivate in a special pond;

[0066] The breeding is continued in the nest by adjusting the water level of the breeding pool 1, controlling the water temperature and feeding according to the living habits of the female shrimps with eggs; deepening the water level of the breeding pool 1 so that the lid 701 is opened, and the female shrimps with eggs go out of the nest to forage for food, during which time they are fed with feed and supplemented with fresh aquatic plants, and at the same time, microbial preparations are used to fertilize the water quality to provide food for the seed shrimps; after the seed shrimps become young shrimps and leave the mother body, the auxiliary plate 3 is removed to lower the water level so that the female shrimps and young shrimps enter the net with the water flow.

[0067] The opening and closing principle of the hemispherical bottom 704 is the same as that of the mouth cover 701 .

Claims

1. A crayfish breeding device, characterized in that: The device comprises a breeding pool (1), the bottom of which is divided into two steps with a height difference, a far-infrared lamp (10) is arranged above the pool body and is connected to an external water storage tank (4); an auxiliary plate (3) is arranged above the lower step in the breeding pool (1), and a nesting plate (2) is arranged above the higher step, and the plates and the pool wall are sealed and connected by soft rubber strips (8); the nesting plate (2) comprises a folding plate (6) and an artificial breeding nest (7), the folding plate (6) is a Z-shaped wave plate, the wave surface is divided into a long wave surface (601) and a short wave surface (602) which are perpendicular to each other, and circular holes are evenly arranged on the upper edge of the long wave surface (601). (603), an artificial breeding nest (7) is placed in the circular hole (603); wherein the artificial breeding nest (7) is a cylindrical structure, and comprises, from top to bottom, a mouth cover (701), a cylinder (703) and a hemispherical bottom (704); the mouth cover (701) and the hemispherical bottom (704) are both made of buoyant materials, and are both connected to the cylinder (703) via a movable joint (702); a mist maker (5) is provided in the water reservoir (4), and the mist maker (5) is connected to a spray pipe (9) above the breeding pool (1); the water reservoir (4) is connected to a water inlet, and a drainage outlet is provided on the lower step in the breeding pool (1); The breeding pool (1) is a cement pool with a depth of 95-105 cm; in the breeding pool (1), the nest board (2) is 25-35 cm higher than the auxiliary board (3); The angle between the long wave plane (601) and the horizontal plane is 20-30°; The diameter of the circular hole (603) accounts for 1 / 2-2 / 3 of the width of the long wave surface (601); The two movable joints (702) are symmetrical about the center of the cylindrical body of the barrel (703); The folding plate (6) is fixed by a frame (604), and a leg (605) is provided below the folding plate (6), and the leg (605) is 45-55 cm above the bottom of the pool; the auxiliary plate (3) is fixed in the same manner as the folding plate (6) and is flush with the folding plate (6), and a net is provided below the auxiliary plate (3); The device is covered with a shed (11); The cross section of the soft rubber strip (8) is elliptical, with two focal points forming circular cavities (802), the circular cavity (802) forming notches (803) outwardly along the long axis, and the rest being a solid portion (801).

2. The use of the crayfish breeding device according to claim 1 in the cultivation of broodstock, mating of broodstock, and cultivation of spawning female shrimps, characterized in that: The following steps are involved: S1. Stocking of broodstock Add water to the breeding pond (1) until the water surface reaches the bottom edge of the circular hole (603), so that the bottom edge of the artificial breeding nest (7) is underwater, and the mouth cover (701) is in a closed state; place the broodstock on the nest plate (2), the number of female broodstock being 1-1.5 times the number of the artificial breeding nest (7), and the ratio of female broodstock to male broodstock being 1:2-3; leave the broodstock to stand until they are evenly distributed on the nest plate (2), and wait for ripening and cultivation; S2. Cultivation of broodstock Turn on the far-infrared lamp (10) for 6 hours a day, raise the temperature by 1-2°C, and turn on the fog maker (5) at the same time. Feed pellet feed once a day in small amounts in batches until the feed stops ingesting; S3. Change water The water is changed once every 2-3 days, and the amount of water added is the height of the water layer where the artificial breeding nest (7) is located multiplied by the bottom area of ​​the breeding pool (1); the specific water changing method is: using the overflow pipe method, the overflow port is adjusted to the edge of the mouth cover (701), and the water volume is maintained so that the mouth cover (701) opens a small gap, and the water source flows in from the top of the nest plate (2), flows into the artificial breeding nest (7) from the small gap of the mouth cover (701), and then flows out from the hollow part of the cylinder (703) to the bottom of the nest plate (2) until it is discharged from the drain port; S4. Mating and reproduction S3 and S4 are repeated until the light yellow ovaries in the female shrimp head turn darker, and ripening is stopped to start mating and reproduction. The specific method is as follows: water is added to the breeding pool (1) so that the mouth cover (701) is fully opened, and the male and female broodstock enter the artificial breeding nest (7) in pairs to mate, and after mating, the male shrimp leaves the nest to mate with other female shrimps again or remains on the nest plate (2); after mating is completed in the artificial breeding nest (7), the auxiliary plate (3) is opened to lower the water level of the breeding pool (1) until the mouth cover (701) is fully closed; At this time, the female shrimps with eggs remain at the bottom of the artificial breeding nest (7), and a relatively closed and transparent incubation environment is formed in the nest; the auxiliary plate (3) is removed, and as the water level drops, the parent shrimps remaining on the nest plate (2) enter the net and are collected; the female shrimps with eggs continue to be cultivated in the nest or collected and cultivated in a special pond; S5. Cultivation of female shrimp with eggs Collect and cultivate in a special pond, the method is: drain the water in the breeding pond (1) until the water level drops below the hemispherical bottom (704), that is, the hemispherical bottom (704) is completely opened, and the female shrimps with eggs slip out of the nest and follow the water flow into the net below the auxiliary plate (3), and are collected and cultivated in a special pond; The breeding is continued in the nest, and the method is as follows: the water level of the breeding pool (1) is adjusted, the water temperature is controlled, and feeding is performed according to the living habits of the female shrimps carrying eggs; the water level of the breeding pool (1) is deepened so that the mouth cover (701) is opened, and the female shrimps carrying eggs go out of the nest to forage for food, during which time they are fed with feed and supplemented with fresh aquatic plants, and at the same time, microbial preparations are used to fertilize the water quality to provide food for the seed shrimps; after the seed shrimps become juvenile shrimps and leave the mother body, the auxiliary plate (3) is removed, and the water level is lowered so that the female shrimps and the juvenile shrimps can enter the net with the water flow.

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