Ecological breeding method and equipment for Procambarus clarkii

Abstract

The present application discloses a method and equipment for raising seedlings of Procambarus clarkii in an ecological manner, which relates to the technical field of Procambarus clarkii breeding, including: S1, mixed breeding of female shrimp and male shrimp until the female shrimp is carrying eggs, and the female shrimp are separated and placed in hatching tanks according to their maturity, so that the female shrimp can hatch seedlings; S2, after the female shrimp has shed the eggs and seedlings, the female shrimp is taken out of the hatching tank; S3, a trace amount of water is introduced into the hatching tank, and the trace amount of water is used to drive the seedlings to move in an ecological manner. The use of an ecological water flow propulsion method to transfer the Procambarus clarkii seedlings to a packaging bag after they are separated from the mother can, on the one hand, quickly and conveniently complete the packaging of the seedlings, and on the other hand, can protect the seedlings from damage during transportation, thereby improving the survival rate of the seedlings.

Description

Technical Field

[0001] The present application relates to the technical field of Procambarus clarkii breeding, and in particular to an ecologically simulated breeding method and equipment for Procambarus clarkii. Background Art

[0002] As living standards improve, people's dietary needs are also increasing. Procambarus clarkii, also known as crayfish, is a delicious and nutritious food, popular among consumers and in high demand. Procambarus clarkii is highly adaptable to its environment and can thrive in a variety of water bodies, including lakes, ponds, rivers, and rice paddies. However, its reproduction time in natural environments is limited by season, and its survival rate is low.

[0003] Currently, artificial breeding is commonly used to cultivate Procambarus clarkii seedlings. Invention Patent Publication No. CN109197711B discloses a method for artificial breeding of Procambarus clarkii seedlings in earthen ponds. By setting up an earthen pond as a breeding pond for crayfish, controlling the male-female ratio of broodstock, the protein ratio of broodstock feed, and the water temperature during the breeding period, the natural breeding conditions of lobsters are simulated, promoting the maturation of the female gonads, thereby shortening the breeding period and promoting more spawning by female shrimp. After the female shrimp lays eggs, the shrimp seedlings are immediately separated from the female shrimp to avoid the broodstock from killing the seedlings. Feed is fed according to the activity, feeding, and development of the shrimp seedlings, and is fed on demand to achieve the growth of the shrimp seedlings without the occurrence of intestinal diseases. However, transferring the seedlings by catching them is difficult to transfer quickly, and unlike the transfer of seedlings in a natural environment, it is easy to damage the seedlings.

[0004] Invention patent announcement number CN116671482A discloses a crayfish seedling raising device and a seedling raising method thereof. The device comprises a temporary holding pond for broodstock, a hatching pond and a seedling raising pond arranged adjacent to each other; a net cage is provided in the hatching pond; the hatching pond and the seedling raising pond are connected; an automatic fishing mechanism is provided on one side of the seedling raising pond, and the automatic fishing mechanism comprises a fishing mechanism body and a trapping light. The crayfish seedling raising device and the seedling raising method provided by the present invention temporarily raises broodstock in a temporary holding pond for broodstock. After the juvenile shrimp are hatched, they can enter the seedling raising pond by themselves through an arc-shaped channel, thereby increasing the survival rate of the seedlings. At the same time, an automatic fishing mechanism is provided on one side of the seedling raising pond, thereby solving the problems of unreasonable breeding methods, low survival rate and inconvenience in catching crayfish at this stage. The catching and replenishing efficiency of the catching and replenishing mechanism is low, and the seedlings are transferred in an unnatural manner, which is likely to cause damage to the seedlings. Summary of the Invention

[0005] In order to solve the problem that Procambarus clarkii is easily damaged during the transfer process, the present application provides a method and equipment for ecologically simulated seedling cultivation of Procambarus clarkii.

[0006] In the first aspect, the present application provides a method for ecologically simulating seedling cultivation of Procambarus clarkii using the following technical solutions:

[0007] A method for raising Procambarus clarkii seedlings in an ecologically simulated manner comprises the following steps: S1, mixing and cultivating female and male shrimps until the female shrimps are carrying eggs, and placing the female shrimps into hatching tanks according to their maturity, so that the female shrimps hatch fry; S2, removing the female shrimps from the hatching tanks after the female shrimps have shed their eggs and fry; and S3, introducing a trace amount of water flow into the hatching tanks, wherein the trace water flow drives the fry to move in an ecologically simulated manner.

[0008] By adopting the above technical solution, female shrimps and male shrimps are mixed and cultivated so that the female shrimps lay shrimp eggs after mating. The shrimp eggs will adhere to the abdomen of the female shrimps. Therefore, the hatching process requires the continuous participation of the female shrimps. Since the female shrimps are fertilized in a certain order during the mixed cultivation process, when the female shrimps are taken out from the mixed cultivation, some female shrimps that are fertilized earlier have already completed a part of the hatching process, and the shrimp eggs will hatch earlier to form seedlings. Therefore, it is necessary to distinguish the maturity of the female shrimps by maturity, and distinguish the female shrimps with different maturity levels so that when the seedlings are collected later, the seedlings can be collected in order according to their maturity, so that the obtained seedlings can have a more consistent maturity. The seedlings of Procambarus clarkii will still remain on the swimming feet of the female shrimps for a period of time after hatching. Therefore, the female shrimps cannot be taken out immediately after hatching. After the female shrimps throw away the seeds and seedlings, all the seedlings are thrown out from the abdomen of the female shrimps. After hatching, the female shrimp needs to be removed to prevent the female shrimp from harming the seedlings; artificial breeding of Procambarus clarkii is already relatively common, but under general breeding methods, the seedlings need to change the breeding location or be packaged and sold after they are separated from the female shrimp. Because the shells of the seedlings have not yet hardened and are relatively fragile, they will frequently collide during the transfer process, resulting in the death of some seedlings. In the natural ecological environment, Procambarus clarkii usually hatch eggs in potholes or caves on the shore near the water surface, and when the water level rises, the water flow rushes into the potholes or caves and carries the seedlings out. Therefore, the hatching tank uses a trace amount of water flow to drive the seedlings from the hatching tank to the packaging bag in an ecological way. Driven by water flow, under the protection of water, the seedlings will not cause excessive damage, thereby improving the survival rate of artificially bred Procambarus clarkii seedlings and improving economic benefits.

[0009] Optionally, mixed breeding of female and male shrimps specifically includes: the ratio of female shrimps to male shrimps is (3.5-4):1.

[0010] By adopting the above technical solution, a high proportion of female shrimps will lead to a decrease in the fertilization rate of shrimp eggs, while a low proportion of female shrimps will lead to an excessive number of redundant male shrimps. By controlling the ratio of female shrimps to male shrimps, while ensuring that female shrimps can lay shrimp eggs normally, the number of female shrimps can occupy as many culture quantities as possible, so that under the premise of a certain number of Procambarus clarkii, the number of female shrimps that can lay eggs is greater, the spawning efficiency is improved, and the production cost is reduced.

[0011] Optionally, placing the female shrimps into hatching tanks according to their maturity specifically includes: judging the maturity of the female shrimps according to the color of the shrimp eggs; and placing one female shrimp into each hatching tank.

[0012] By adopting the above technical solution, as the eggs develop, the color of the eggs will change regularly. Immature eggs are transparent or light yellow, while mature eggs are dark brown or dark yellow. This color change is caused by biochemical reactions and pigment deposition inside the eggs. Therefore, by observing the color of the eggs, the maturity of the shrimp can be quickly and relatively accurately judged. In the natural ecology, Procambarus clarkii usually incubates eggs alone to avoid natural enemies and avoid intensified competition among the same species. Therefore, the seedling breeding method also uses an ecologically simulated solitary method to improve the incubation environment, which can provide a better growth environment for the seedlings and increase the survival rate of the seedlings.

[0013] Optionally, moist soil is provided in the hatching tank, the thickness of the moist soil is 10-13 cm, and the water content of the moist soil is 85-100%. The female shrimp is placed on the moist soil, and the light in the hatching tank is kept dim so that the female shrimp can hatch in an ecologically simulated environment.

[0014] By adopting the above technical solution, since Procambarus clarkii usually digs holes in the moist soil on the shore to lay eggs, the provision of moist soil in the hatching tank can better simulate the breeding scene of Procambarus clarkii, thereby facilitating the normal development of the seedlings. Since female shrimps will dig holes in the moist soil, the moist soil needs to have a certain thickness to ensure that the female shrimps can dig holes suitable for hatching. The high water content of the moist soil can make it easier to dig holes and build holes, and can also ensure that the hatching process is sufficiently moist so that the seedlings can hatch normally.

[0015] Optionally, the temperature of the trace water flow is 22-24° C., the dissolved oxygen content is 10-13 mg / L, the pH value is 6.8-7.3, and the mass concentration of sodium chloride is 1-3%.

[0016] By adopting the above technical solution, trace water flow is the main carrier of the living environment of female shrimp and seedlings. Therefore, the condition parameters of the trace water flow need to be regulated to ensure that the living environment of female shrimp and seedlings is suitable during the hatching process. The trace water flow temperature is 22-24°C, the dissolved oxygen content is 10-13 mg / L, and the pH value is 6.8-7.3, which can form a relatively mild liquid environment. Adding a small amount of sodium chloride can not only provide the chlorine element necessary for the growth of seedlings, but also speed up the hatching process and improve production efficiency.

[0017] Optionally, an opening is provided above the moist soil. After a small amount of water flows into the hatching tank, the water level submerges the opening and flows out from the opening. The opening allows the small amount of water to carry the seedlings out of the hatching tank.

[0018] By adopting the above technical solution, since the seedlings are all in the moist soil, it is necessary to use a trace amount of water flow to first submerge the moist soil so that the seedlings can crawl out of the moist soil. When the water level is above the opening, the water flows out of the hatching tank, forming a flowing trace amount of water flow in the hatching tank. The trace amount of water flow can drive the seedlings to move out of the hatching tank. After the crayfish seedlings are hatched in the natural environment, the water level of the river or pond will rise and submerge the cave. The seedlings can follow the water flow that submerges the cave and swim out of the cave. By submerging the moist soil with the trace amount of water flow, the seedlings can be transferred and collected without being damaged, thereby avoiding injury to the seedlings during the transfer and collection process and improving the survival rate and quality of the seedlings.

[0019] Optionally, the opening is provided with a brush, the brush covers the channel of the opening, and a bait is provided on the side of the opening away from the hatching tank, and the seedlings pass through the brush under the guidance of the bait.

[0020] By adopting the above technical solution, on the one hand, the brush can scrape off the mud stuck on the seedlings, so that the seedlings passing through the opening can have a cleaner appearance. On the other hand, the brush has a certain toughness, and only well-developed seedlings that have grown to a certain extent and have a certain strength can pass through the brush. Therefore, it can play a screening role for the obtained shrimp seedlings. However, due to the large degree of obstruction of the brush, although a small amount of water flows through the brushes, the seedlings may not overcome the obstruction of the brush and pass through the opening. Therefore, a bait is provided on the side of the opening away from the hatching tank. The bait attracts the seedlings so that the seedlings can try their best to overcome the brush and pass through the opening, so that the brush can clean the mud on the seedlings and screen out well-developed seedlings.

[0021] In the second aspect, the present application provides a seedling raising device adopting the following technical solution:

[0022] A seedling raising device for use in the above-mentioned ecologically simulated seedling raising method for Procambarus clarkii comprises a hatching tank, a regulating tank, and a collecting tube. There are a plurality of hatching tanks, each of which is connected to the regulating tank. A water flow port is provided between the hatching tank and the regulating tank, and is used to introduce a trace amount of water into the hatching tank. The hatching tank is connected to the collecting tube. A connecting port is provided between the hatching tank and the collecting tube, and the connecting port is provided with a brush for shielding the passage of the connecting port. The collecting tube is provided with bait for luring Procambarus clarkii seedlings to pass through the connecting port.

[0023] By adopting the above technical solution, the regulating tank is used to adjust the external water source introduced into the seedling raising equipment to a trace water flow suitable for the hatching process of Procambarus clarkii by adding oxygen, adding salt, and adjusting the pH. There are multiple hatching tanks, so that female shrimps of different maturity levels can be hatched separately, so that the seedlings mature and leave the mother body at a relatively close time, so as to obtain seedlings of uniform specifications. The outer pool is used to collect the trace water flow flowing out of the hatching tank. The trace water flow flows from the regulating tank into the hatching tank and then flows from the hatching tank into the outer pool. The outer pool can collect the trace water flow flowing through the hatching tank, which is convenient for subsequent processing of the trace water flow. The connecting port can form a water flow through gravity or water injection in the regulating tank, thereby driving the seedlings to move, so that the seedlings enter the packaging bag along with the water flow. On the one hand, the packaging of the seedlings can be completed quickly and conveniently, and on the other hand, the seedlings can be protected from damage during transportation, thereby improving the survival rate of the seedlings.

[0024] Optionally, the collecting trough is connected to the collecting tube and is used to gather the seedlings in the collecting tube. The collecting trough has a drainage port and a collecting port. The drainage port is provided with a filter to prevent the seedlings from flowing out.

[0025] By adopting the above technical solution, the collection trough is used to gather the seedlings that flow out of the incubation trough through the collection tube. Since the seedlings pass through the connection port with the brush at a slow speed, and a small amount of water will always keep flowing through the connection port, the amount of water flowing into the collection trough will be much larger than the amount of seedlings. Therefore, it is necessary to use a collection trough to gather the seedlings and discharge the excess water. The excess water is discharged through the water flow port provided with a filter and the seedlings are left in the collection trough. When the number of seedlings gathers to a certain extent, they can be connected to a packaging bag or other transportation equipment through the connection port, so that the seedlings can be transferred to the outside world along with the water flow, while gathering the seedlings and preventing them from being damaged.

[0026] Optionally, a debris trough is further included, which is connected to the hatching tank and is used to clean the debris in the hatching tank.

[0027] By adopting the above technical solution, since various materials such as moist soil are arranged in the hatching tank to assist the hatching of female shrimps, and these materials cannot be reused for a long time and need to be replaced from time to time, a debris trough is provided to collect the residual materials in each hatching tank, which is conducive to cleaning the hatching tank or replacing the internal materials.

[0028] In summary, this application includes at least one of the following beneficial technical effects:

[0029] 1. The ecological water flow propulsion method is used to transfer the crayfish seedlings into the packaging bag after they are separated from the mother. On the one hand, it can quickly and conveniently complete the packaging of the seedlings. On the other hand, it can protect the seedlings from damage during transportation and improve the survival rate of the seedlings.

[0030] 2. Differentiate female shrimps by their maturity and place each female shrimp in a separate hatching tank for incubation. Adjust the liquid level and flow rate of the trace water flow as the degree of incubation progresses, so that the female shrimps can hatch their seedlings in a more ecological and suitable environment, which is beneficial to improving the health of the seedlings and thus increasing the survival rate of the seedlings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 1 is a flow chart of the ecological breeding method for Procambarus clarkii according to an embodiment of the present application;

[0032] Figure 2 This is a schematic diagram of the overall structure of the seedling raising equipment according to the embodiment of the present application from a first angle;

[0033] Figure 3 This is a schematic diagram of the overall structure of the seedling raising equipment according to the embodiment of the present application from a second angle;

[0034] Figure 4 This is a schematic diagram of the cross-sectional structure of the collection tube of the seedling raising equipment according to an embodiment of the present application;

[0035] Figure 5 This is a schematic diagram of the cross-sectional structure of the hatching tank of the seedling raising equipment according to an embodiment of the present application;

[0036] Figure 6 This is a schematic diagram of the collection tube structure of the seedling raising equipment according to an embodiment of the present application;

[0037] Figure 7 yes Figure 6 Schematic diagram of the structure of part A.

[0038] Figure markings: 1. Hatching trough; 11. Water outlet; 12. Debris passage; 13. Hatching trough drain outlet; 2. Adjustment trough; 21. Water inlet; 22. Water outlet; 3. Collection pipe; 31. Connection port; 32. Brush; 33. Bait; 4. Collection trough; 41. Drain outlet; 42. Collection port; 5. Debris trough; 51. Debris outlet. DETAILED DESCRIPTION

[0039] The present application is further described in detail below with reference to the embodiments.

[0040] A method for raising crayfish by imitating ecology, referring to Figure 1 , including the following steps:

[0041] S1. Mix and cultivate female shrimps and male shrimps until the female shrimps are carrying eggs. The female shrimps are separated and placed into hatching tanks according to their maturity so that the female shrimps can hatch fry.

[0042] Specifically, the ratio of female shrimp to male shrimp during mixed cultivation is (3.5-4):1. By controlling the ratio of female shrimp to male shrimp, the number of female shrimp cultured can be increased as much as possible while ensuring that female shrimp can lay eggs normally, thereby improving spawning efficiency and reducing production costs.

[0043] Specifically, female shrimps are separated and placed in hatching tanks according to their maturity. Since the time when female shrimps lay eggs is different during mixed breeding, the time when they give birth will also be different. Differentiating female shrimps by their maturity can make female shrimps with similar maturity drop seeds and seedlings at a similar time in the same hatching tank, which is conducive to collecting the seedlings at the same time and keeping the size of the collected seedlings consistent.

[0044] More specifically, the maturity of female shrimp can be judged based on the color of the shrimp eggs. As the eggs develop, the color of the eggs will change regularly. Immature eggs are transparent or light yellow, while mature eggs are dark brown or dark yellow. This color change is caused by biochemical reactions and pigment deposition inside the eggs. Therefore, by observing the color of the eggs, the maturity of the shrimp can be judged quickly and relatively accurately.

[0045] Specifically, a female shrimp is placed in each hatching tank. Under natural conditions, Procambarus clarkii usually incubates eggs alone. When incubating eggs, the female shrimp will look for caves by the river and incubate the seedlings alone in the caves. Incubating eggs alone can avoid natural enemies and avoid competition among the same species and killing of seedlings. The use of an ecologically simulated solitary incubation method can provide a better growth environment for the seedlings, which is conducive to improving the survival rate of the seedlings.

[0046] Specifically, moist soil is provided in the hatching tank. The thickness of the moist soil is 10-13 cm, and the moisture content of the moist soil is 85-100%. Female shrimp are placed on the moist soil, and the light in the hatching tank is kept dim so that the female shrimp can hatch in an ecologically simulated environment. Procambarus clarkii usually digs holes in the moist soil on the shore to lay eggs. By providing moist soil in the hatching tank, the breeding scene of Procambarus clarkii can be better simulated, thereby facilitating the normal development of the seedlings. Since female shrimp will dig holes in the moist soil, the moist soil needs to have a certain thickness to ensure that the female shrimp can dig holes suitable for hatching. The high moisture content of the moist soil can make the moist soil easier to dig holes and ensure that the hatching process is sufficiently moist so that the seedlings can hatch normally.

[0047] S2. After the female shrimp has discarded its fry, remove the female shrimp from the hatching tank.

[0048] Specifically, after the female shrimp throws away the eggs and fry, there are no more shrimp eggs or fry remaining on the swimming legs. When it is observed that the female shrimp no longer holds eggs, the female shrimp can be taken out of the hatching tank. If the female shrimp digs a hole to hatch eggs, the female shrimp can be taken out after crawling out of the hole. The fry of Procambarus clarkii will still remain on the swimming legs of the female shrimp for a period of time after hatching, so the female shrimp cannot be taken out immediately after hatching. After the female shrimp throws away the eggs and fry, all the fry are thrown out from the abdomen of the female shrimp. After the fry are thrown out, the female shrimp needs to be taken out to avoid the female shrimp causing damage to the fry.

[0049] S3. A small amount of water is introduced into the incubation tank, and the small amount of water drives the seedlings to move in an ecological way.

[0050] Specifically, the trace water flow has a temperature of 22-24°C, a dissolved oxygen content of 10-13 mg / L, a pH value of 6.8-7.3, and a mass concentration of sodium chloride of 1-3%. Trace water flow is the main carrier of the living environment of female shrimp and fry. Therefore, the conditional parameters of the trace water flow need to be regulated to ensure a suitable living environment for female shrimp and fry during the hatching process. The trace water flow temperature of 22-24°C, the dissolved oxygen content of 10-13 mg / L, and the pH value of 6.8-7.3 can form a relatively mild liquid environment. Adding a small amount of sodium chloride can not only provide the chlorine element necessary for the growth of fry, but also speed up the hatching process and improve production efficiency. The water used in mixed cultivation can be used as the source of trace water flow. Since the crayfish has low requirements for water sources, it is only necessary to ensure that the water used in mixed cultivation is not contaminated and it can be used as the trace water flow for transporting the seedlings in the hatching tank. In addition, the amount of trace water flow is less than the amount of water used in mixed cultivation, so the water in mixed cultivation is sufficient as the trace water flow to transport the seedlings in the hatching tank.

[0051] Specifically, an opening is provided above the moist soil. After a small amount of water flows into the hatching tank, the water level is above the opening, and the opening is used for the small amount of water to bring the seedlings out of the hatching tank. After the seedlings are separated from the female shrimp, they need to be reared in a new place or packaged and sold. Since the shells of the seedlings have not yet hardened and are relatively fragile, they will frequently collide during the transfer process, resulting in the death of some seedlings. In the natural ecological environment, Procambarus clarkii usually incubate eggs in pits or caves on the shore near the water surface, and when the water level rises, the water flows into the pits or caves and carries the seedlings out; if the female shrimp digs holes in moist soil to hatch the seedlings, the seedlings will remain in the moist soil. When the water level submerges the moist soil and does not cover the opening, the water flows out of the hatching tank, forming a trace water flow in the hatching tank. The trace water flow can drive the seedlings to move away from the hatching tank. By submerging the moist soil with a trace water flow, the seedlings can be transferred and collected without being damaged, thereby avoiding injury to the seedlings during the transfer and collection process and improving the survival rate and quality of the seedlings.

[0052] More specifically, the opening is provided with a brush, which blocks the passage of the opening. A bait is provided on the side of the opening away from the hatching tank, and the seedlings are guided by the bait to pass through the brush. On the one hand, the brush can scrape off the dirt stuck on the seedlings, so that the seedlings passing through the opening can have a cleaner appearance. On the other hand, the brush has a certain toughness, and only seedlings that are well-developed and have grown to a certain size and have a certain strength can pass through the brush. Therefore, it can play a role in screening the obtained shrimp seedlings. However, due to the large degree of obstruction of the brush, even if a small amount of water flows through the brushes, the seedlings may not overcome the obstruction of the brush and pass through the opening. Therefore, the bait is provided on the side of the opening away from the hatching tank, and the seedlings are attracted by the bait, so that the seedlings can try their best to overcome the brush and pass through the opening, so that the brush can clean the dirt on the seedlings and screen out well-developed seedlings.

[0053] A seedling raising device, referring to Figures 2 to 5 , including a hatching tank 1, an adjusting tank 2, a collecting pipe 3, a collecting tank 4 and a debris tank 5. The number of hatching tanks 1 is multiple, which are respectively arranged on both sides of the adjusting tank 2. The hatching tank 1 is connected to the adjusting tank 2 through a water flow port 11. The hatching tank 1 is for female shrimp to hatch shrimp eggs. The adjusting tank 2 is used to provide water flow to the hatching tank 1. The water flow can be used to provide nutrition, water and a moist environment for female shrimp to hatch shrimp eggs, and can also be used to take the hatched seedlings out of the hatching tank 1. The hatching tank 1 is also provided with a hatching tank drain port 13. The hatching tank drain port 13 can be used to drain the water in the hatching tank 1. Since the hatching process of the seedlings includes a process where the water level is not high, the hatching tank drain port 13 is provided. The water outlet 13 can better control the amount of water in the hatching tank 1; the regulating tank 2 is used to adjust the external water to a water source suitable for the breeding of female shrimps. The regulating tank 2 can also be used for mixed cultivation of female shrimps and male shrimps. The regulating tank 2 is provided with a water inlet 21 and a water outlet 22, which are respectively used to add water to or drain water from the regulating tank 2. Since the amount of water used in the hatching tank 1 is smaller than the volume of the regulating tank 2, a water outlet 22 is required to ensure that the water flow in the regulating tank 2 can keep flowing; the collecting pipe 3 is arranged between two adjacent hatching tanks 1, and the collecting pipe 3 is provided with a connecting port 31. The connecting port 31 connects the hatching tank 1 and the collecting pipe 3, so that the seedlings can flow out of the hatching tank 1 through the connecting port 31.

[0054] Reference Figure 4 and Figure 5The collecting tank 4 is arranged below the regulating tank 2 and is connected to the collecting pipe 3. When the collecting pipe 3 collects the seedlings in the hatching tank 1, the water flow will be maintained all the time, and it will take a certain amount of time for the seedlings to pass through the connecting port 31. Therefore, the amount of water discharged from the collecting pipe 3 will be much larger than the amount of the seedlings. By opening a drain port 41 in the collecting tank 4, the collecting tank 4 is prevented from being filled with water. A screen is provided in the drain port 41. The screen can prevent the seedlings from flowing out of the drain port 41 with the water while the water is discharged from the drain port 41, thereby keeping the seedlings in the collecting tank 4 to achieve the purpose of enriching the seedlings. When the seedling content in the collecting tank 4 reaches a certain level, the seedlings can be discharged through the collecting port 42 under the wrapping of the water flow and transferred to a packaging bag or other breeding equipment.

[0055] Reference Figure 4 and Figure 5 A debris trough 5 is further provided below the hatching tank 1 and the collecting tank 4. The debris trough 5 is connected to the hatching tank 1. A debris channel 12 is provided below the hatching tank 1. The debris channel 12 can be opened from the top to connect the hatching tank 1 and the debris trough 5. When the hatching tank 1 needs to be cleaned and replaced, the debris in the hatching tank 1 can be discharged into the debris trough 5 through the debris channel 12. Since there are many hatching tanks 1 and it is troublesome to clean them separately, a debris trough 5 is provided so that the debris in the hatching tank 1 can be discharged into the debris trough 5 and discharged uniformly through the debris outlet 51, making it more convenient to clean and replace the materials in the hatching tank 1.

[0056] Reference Figure 5 and Figure 6 The brush 32 has a certain toughness and can form a certain obstacle for the seedlings to pass through the connecting port 31, so that only the seedlings with good development and certain strength can pass through the connecting port 31. The brush 32 can also scrape off the dirt and other impurities adhering to the surface of the seedlings when the seedlings pass through the connecting port 31. Due to the low flow rate of the water flow, the seedlings will not be accumulated to the connecting port 31 by the water flow in the incubator 1. However, in order to encourage the seedlings to overcome the brush 32 and pass through the connecting port 31, a bait 33 is further provided in the collecting tube 3. The bait 33 can attract the seedlings and encourage them to pass through the connecting port 31, so that the seedlings passing through the connecting port 31 are all well-developed individuals with sufficient strength to overcome the brush 32, which is conducive to ensuring that the seedlings collected by the seedling raising equipment are of consistent and high quality.

[0057] The implementation principle of the embodiment of the present application is as follows: water is added to the regulating tank 2 through the water inlet 21. The regulating tank 2 can be used for mixed cultivation of male and female shrimps, and the water in the regulating tank 2 can be adjusted to be suitable for the growth and reproduction of Procambarus clarkii by means of aerators, water plants, etc. After the female shrimps are carrying eggs, they are placed alone in the hatching tank 1 for hatching. Before placing them, the water in the regulating tank 2 is opened to allow the water in the hatching tank 1 to control the amount of water in the hatching tank 1. After the female shrimps have shed their eggs and seedlings in the hatching tank 1, they are taken out of the hatching tank 1 and water is continued to be passed into the hatching tank 1 through the water inlet 11. The water level is made to cover the connecting port 31, so that the seedlings follow the water flow and, under the stimulation of the bait 33, flow through the brush 32 from the connecting port 31 into the collecting tube 3 and into the collecting tank 4. In the collecting tank 4, the water flows out from the drain port 41, and the seedlings are gathered in the collecting tank 4. When the degree of seedling aggregation reaches a certain number, the seedlings are discharged from the collecting tank 4 through the collecting port 42 for packaging or transfer; when the hatching tank 1 needs to be cleaned, the debris channel 12 is opened, and the soil and other debris are flushed into the debris tank 5, and then the soil and other debris are discharged together through the debris outlet 51, which is convenient for collection and cleaning.

[0058] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. A method for raising crayfish by imitating ecology, characterized in that: include: S1, mixing and cultivating female shrimp and male shrimp until the female shrimp is laden with eggs, and placing the female shrimp into hatching tanks according to their maturity, so that the female shrimp hatch fry; S2, after the female shrimp throws away the seeds and fry, take the female shrimp out of the hatching tank; S3, introducing a small amount of water into the incubation tank, wherein the small amount of water drives the seedlings to move in an ecological manner; The hatching tank is provided with moist soil, the thickness of the moist soil is 10-13 cm, and the water content of the moist soil is 85-100%. The female shrimp is placed on the moist soil, and the light in the hatching tank is kept dim so that the female shrimp can hatch in an ecological environment. A connection port is further provided above the moist soil. After a small amount of water flows into the incubation tank, the water level covers the connection port and flows out from the connection port. The connection port is used for the small amount of water to carry the seedlings out of the incubation tank. The connecting port is provided with a brush, which covers the channel of the connecting port. A bait is provided on the side of the connecting port away from the hatching tank, and the seedlings pass through the brush under the guidance of the bait.

2. The ecological breeding method for Procambarus clarkii according to claim 1, characterized in that: The mixed cultivation of female shrimp and male shrimp specifically comprises: The ratio of female shrimp to male shrimp is (3.5-4):

1.

3. The ecological breeding method for Procambarus clarkii according to claim 1, characterized in that: The step of placing the female shrimps into the hatching tanks according to their maturity specifically includes: Judge the maturity of the female shrimp by the color of the eggs; place one female shrimp in each hatching tank.

4. The ecological breeding method for Procambarus clarkii according to claim 1, characterized in that: The temperature of the trace water flow is 22-24° C., the dissolved oxygen content is 10-13 mg / L, the pH value is 6.8-7.3, and the mass concentration of sodium chloride is 1-3%.

5. A seedling raising device for use in the ecological seedling raising method for Procambarus clarkii according to any one of claims 1 to 4, characterized in that: The invention comprises a hatching tank, an adjusting tank and a collecting pipe, wherein the number of the hatching tanks is multiple, each hatching tank is connected to the adjusting tank respectively, a water flow port is provided between the hatching tank and the adjusting tank, the water flow port is used to introduce a trace amount of water into the hatching tank, the hatching tank is connected to the collecting pipe, a connecting port is provided between the hatching tank and the collecting pipe, the connecting port is provided with a brush for covering the passage of the connecting port, and bait is provided in the collecting pipe for luring fry of Procambarus clarkii to pass through the connecting port.

6. The seedling raising equipment according to claim 5, characterized in that: It also includes a collecting trough, which is connected to the collecting pipe and is used to gather the seedlings in the collecting pipe. The collecting trough has a drainage port and a collection port. The drainage port is provided with a filter to prevent the seedlings from flowing out.

7. The seedling raising equipment according to claim 5, characterized in that: It also includes a debris trough, which is connected to the hatching tank and is used to clean the debris in the hatching tank.

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