Indoor and outdoor breeding system and method for cherax quadricarinatus seeds

Abstract

The invention relates to the technical field of cherax quadricarinatus culture, in particular to an indoor and outdoor cherax quadricarinatus seed culture system and method. Comprising a greenhouse, at least one nursery pond, a drainage channel and a self-purification sedimentation pond, the nursery pond is located in the greenhouse, the self-purification sedimentation pond is located outside the greenhouse, and the drainage channel is arranged between the self-purification sedimentation pond and the greenhouse; an overflow pipe is mounted in each nursery pond and is vertically arranged, and the bottom end of each overflow pipe is communicated with a nursery pond water outlet; the water outlet of the nursery pond is communicated with the shrimp seed collecting device which is arranged in the drainage channel. The breeding system is reasonable in device arrangement and simple to operate, and has the advantages of convenience, low cost, high efficiency and high survival rate; the indoor culture mode and the outdoor culture mode are combined together, so that artificial culture of the cherax quadricarinatus becomes possible.

Description

Technical Field

[0001] The present invention relates to the technical field of Pontastacus leptodactylus farming, and more particularly to an indoor and outdoor farming system and method for Pontastacus leptodactylus fry. Background Art

[0002] With the improvement of people's living standards, the demand for high-quality protein among Chinese residents is increasing continuously. The aquatic product market is booming, and the freshwater shrimp farming technology is becoming more and more popular at present. With the continuous increase of market demand, the supply of aquatic products in China falls short of demand, and new varieties and technologies are urgently needed to enter the market. Pontastacus leptodactylus (Latin name: Pontastacus leptodactylus), also known as Grusii crayfish, Eastern European crayfish, and narrow-clawed crayfish in Chinese, is native to Eastern European countries such as Turkey, Bulgaria, and Russia. It is the second most widely distributed native freshwater crayfish species in Europe and is mainly distributed in the Irtysh River Basin in China. Pontastacus leptodactylus belongs to freshwater cold-water shrimp. This shrimp is relatively large in size, with an average individual weight of 100-200 grams, and the largest individual in the natural basin can reach 400 grams. Pontastacus leptodactylus belongs to omnivorous shrimps, with a wide range of feed sources, strong environmental tolerance, high meat yield, and few diseases, having great economic value. This shrimp was newly discovered in China in August 2023, and live samples can be captured in small quantities in the natural basin.

[0003] At present, all Pontastacus leptodactylus live in natural basins and are released into the wild by humans. They are greatly affected by external factors such as weather, with many uncertain factors and low survival rates. Moreover, there was no artificial breeding technical method in China before, and intensive farming was restricted. How to achieve the artificial breeding of Pontastacus leptodactylus fry is the key problem to be solved. Indoor fry farming can artificially regulate the farming environment and create a suitable farming environment by adjusting temperature, light, and water quality. The problems brought by indoor fry farming are the increased cost and the slow growth of fry due to the single water environment; outdoor pond farming has low cost and fast fry growth, but due to the complex outdoor environment, large water quality fluctuations, and weak fry, they cannot adapt to the external environment, resulting in a large number of fry deaths. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an indoor and outdoor farming system and method for Pontastacus leptodactylus fry.

[0005] The technical solution of the present invention to solve the above technical problems is as follows:

[0006] The present invention provides an indoor and outdoor farming system for Pontastacus leptodactylus fry, including a greenhouse, at least one breeding pond, a drainage channel, and a self-purifying sedimentation tank. The breeding pond is located inside the greenhouse, the self-purifying sedimentation tank is located outside the greenhouse, and a drainage channel is provided between the self-purifying sedimentation tank and the greenhouse;

[0007] An overflow pipe is installed in each of the seedling rearing ponds. The overflow pipe is vertically arranged, and its bottom end is communicated with the water outlet of the seedling rearing pond. The water outlet of the seedling rearing pond is communicated with a shrimp seedling collection device, and the shrimp seedling collection device is arranged in the drainage channel.

[0008] Based on the above technical solution, the present invention can also be improved as follows.

[0009] Further, the shrimp seedling collection device includes a buffer tank and a shrimp seedling collection net located in the buffer tank. The water outlet of the seedling rearing pond is inserted into and fixed to the shrimp seedling collection net. The buffer tank is located in the drainage channel and is communicated with the drainage channel.

[0010] Further, a normal temperature water inlet and a cold water inlet are provided on the side wall of the seedling rearing pond, and the normal temperature water inlet and the cold water inlet are oppositely arranged at the lower part of the seedling rearing pond.

[0011] Further, there are multiple seedling rearing ponds, and the multiple seedling rearing ponds are divided into two rows and arranged on both sides of the drainage channel respectively.

[0012] Further, the overflow pipe includes multiple pipe bodies, and each pipe body is connected by a thread. At least one end of each pipe body is provided with a filter screen.

[0013] Further, an oxygenation device is installed at the bottom of the seedling rearing pond.

[0014] Further, a shrimp nest is installed in the seedling rearing pond, and the shrimp nest is a tubular structure.

[0015] Further, a skylight is provided on the roof of the greenhouse, and a movable sunshade net is installed on the skylight.

[0016] Further, the water outlet of the self-cleaning sedimentation tank is communicated with an outdoor shrimp seedling cultivation pond, and a bird-proof net is installed on the outdoor shrimp seedling cultivation pond.

[0017] The present invention also provides an indoor and outdoor cultivation method for narrow-clawed crayfish shrimp seedlings, which is cultivated by using the above system, and includes the following steps:

[0018] S1. Introduce the cultivation water into each of the seedling rearing ponds and adjust the height of the overflow pipe.

[0019] S2. Place the shrimp seedlings in the seedling rearing ponds for indoor cultivation.

[0020] S3. Transfer the shrimp seedlings after indoor cultivation to the outdoor cultivation area for outdoor cultivation.

[0021] The beneficial effects of the present invention are as follows:

[0022] (1) The indoor and outdoor breeding system for juvenile narrow-clawed crayfish of the present invention has the breeding ponds located inside the greenhouse, enabling artificial regulation of the hatching and breeding environment of the juvenile crayfish and preventing problems such as the death of juvenile crayfish caused by large fluctuations in outdoor environmental conditions;

[0023] (2) The indoor and outdoor breeding system for juvenile narrow-clawed crayfish of the present invention has the self-purifying sedimentation tank located outside the greenhouse and connected to the breeding ponds through a drainage channel, enabling the water body in the breeding ponds to remain flowing and be discharged outdoors, solving the problem of slow growth caused by a single water body;

[0024] (3) The indoor and outdoor breeding system for juvenile narrow-clawed crayfish of the present invention is reasonably arranged and easy to operate, having the advantages of convenience, low cost, high efficiency, and high survival rate;

[0025] (4) The indoor and outdoor breeding method for juvenile narrow-clawed crayfish of the present invention combines indoor and outdoor breeding methods, making it possible to artificially breed narrow-clawed crayfish. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of the indoor and outdoor breeding system for juvenile narrow-clawed crayfish of the present invention;

[0027] Figure 2 is a top view of the layout structure of multiple breeding ponds and drainage channels in the indoor and outdoor breeding system for juvenile narrow-clawed crayfish of the present invention;

[0028] Figure 3 is a side view of the structure of the breeding pond in the indoor and outdoor breeding system for juvenile narrow-clawed crayfish of the present invention;

[0029] Figure 4 is the morphology of 7-day-old crayfish in the embodiment of the indoor and outdoor breeding system for juvenile narrow-clawed crayfish of the present invention;

[0030] Figure 5 is the morphology of 14-day-old crayfish in the embodiment of the indoor and outdoor breeding system for juvenile narrow-clawed crayfish of the present invention;

[0031] Figure 6 is the morphology of 21-day-old crayfish in the embodiment of the indoor and outdoor breeding system for juvenile narrow-clawed crayfish of the present invention;

[0032] Figure 7 are schematic diagrams of each structure of the narrow-clawed crayfish.

[0033] In the drawings, the list of components represented by each reference numeral is as follows:

[0034] 1. Greenhouse; 11. Movable sunshade net;

[0035] 2. Breeding pond; 21. Overflow pipe; 22. Normal temperature water inlet; 23. Cold water inlet; 24. Outlet of the breeding pond;

[0036] 3. Shrimp seedling collection device; 31. Shrimp seedling collection net; 32. Buffer tank;

[0037] 4. Drainage channel; 5. Self-purifying sedimentation tank; 6. Reservoir; 7. Outdoor shrimp seedling cultivation pond; 8. Disinfection tank; 81. Regulating valve; 82. Ultraviolet lamp;

[0038] A. Cheliped length; B. Antenna length; C. Cephalothorax; D. Cheliped width. Specific embodiments

[0039] The principles and features of the present invention will be described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0040] As Figures 1-3 shown, the indoor and outdoor cultivation system for narrow-chela crayfish shrimp seedlings of the present invention includes a greenhouse 1, at least one seedling cultivation pond 2, a drainage channel 4 and a self-purifying sedimentation tank 5. The seedling cultivation pond 2 is located inside the greenhouse 1, and the self-purifying sedimentation tank 5 is located outside the greenhouse 1. A drainage channel 4 is provided between the self-purifying sedimentation tank 5 and the greenhouse 1; an overflow pipe 21 is installed in each seedling cultivation pond 2. The overflow pipe 21 is arranged vertically and its bottom end is communicated with the water outlet 24 of the seedling cultivation pond; the water outlet 24 of the seedling cultivation pond is communicated with the shrimp seedling collection device 3, and the shrimp seedling collection device 3 is arranged in the drainage channel 4.

[0041] In the indoor and outdoor cultivation system for narrow-chela crayfish shrimp seedlings of the present invention, the seedling cultivation pond 2 is located inside the greenhouse 1, so that the hatching and seedling cultivation environment of the shrimp seedlings can be artificially regulated, preventing problems such as the death of shrimp seedlings caused by large fluctuations in outdoor environmental conditions. The self-purifying sedimentation tank 5 is located outside the greenhouse 1 and is communicated with the seedling cultivation pond 2 through the drainage channel 4, so that the water body in the seedling cultivation pond 2 can keep flowing and be discharged outdoors, solving the problem of slow growth caused by a single water body.

[0042] Preferably, in the cultivation system of the present invention, the shrimp seedling collection device 3 includes a buffer tank 32 and a shrimp seedling collection net 31 located in the buffer tank 32; the water outlet 24 of the seedling cultivation pond is inserted into and fixed to the shrimp seedling collection net 31; the buffer tank 32 is located in the drainage channel 4 and is communicated with the drainage channel 4; in this way, the shrimp seedlings flowing out with the water flow from the water outlet 24 of the seedling cultivation pond can be collected in the shrimp seedling collection net 31, reducing the impact of the water flow on the shrimp seedlings and improving the survival rate of the shrimp seedlings; the buffer tank 32 is located in the drainage channel 4, which is convenient for the water in the buffer tank 32 to be discharged into the drainage channel 4.

[0043] Further preferably, the holes of the shrimp seedling collection net 31 are 20 mesh and the texture is soft nylon; the shrimp seedling collection net 31 can effectively collect the shrimp seedlings and prevent the shrimp seedlings from directly entering the buffer tank 32.

[0044] Further preferably, the shrimp fry collection net 31 is detachably connected to the water outlet 24 of the breeding pool by means of a buckle structure, which facilitates the disassembly, cleaning and replacement of the shrimp fry collection net 31.

[0045] Further preferably, the buffer tank 32 has a side edge higher than the water outlet 24 of the breeding pool to ensure that the water outlet pipe extends into the buffer tank 32.

[0046] Further preferably, a segmented iron rack is arranged on the drainage canal 4, each section of the iron rack can be moved independently, and each buffer tank 32 can be placed on the iron rack.

[0047] In the indoor and outdoor breeding system for Cambarus zhejiangensis fry of the present invention, the side wall of the breeding pool 2 is provided with a normal temperature water inlet 22 and a cold water inlet 23, and the normal temperature water inlet 22 and the cold water inlet 23 are oppositely arranged at the lower part of the breeding pool 2; in this way, the water temperature of the breeding pool 2 can be adjusted. The normal temperature water inlet 22 and the cold water inlet 23 are communicated with the water inlet pipe of the greenhouse 1, and the water inlet pipe can input normal temperature water and cold water into the normal temperature water inlet 22 and the cold water inlet 23.

[0048] Further preferably, the ends of the normal temperature water inlet 22 and the cold water inlet 23 are both L-shaped and are centrosymmetric about the center of the breeding pool 2; in this way, a certain buffer can be carried out during the water temperature adjustment to prevent adverse effects on the shrimp fry caused by too rapid temperature changes or water flow velocity changes.

[0049] Preferably, there are multiple breeding pools 2, and the multiple breeding pools 2 are divided into two rows and arranged on both sides of the drainage canal 4 respectively; in this way, the breeding efficiency can be increased, and when there are more shrimp fry, they are bred in different breeding pools 2 respectively to prevent the decline of the water environment quality caused by too many shrimp fry and facilitate the different control of the environment of each breeding pool 2.

[0050] Preferably, the overflow pipe 21 includes multiple pipe bodies, and each pipe body is connected by a thread; at least one end of each pipe body is provided with a filter screen; the overflow pipe 21 can prevent the water in the breeding pool 2 from being too much. Using multiple pipe bodies can make the height of the overflow pipe 21 adjustable, and the filter screen can prevent the shrimp fry from flowing out with the overflowing water flow.

[0051] Preferably, an oxygenation device is installed at the bottom of the breeding pool 2; the oxygenation device can oxygenate the breeding pool 2 in real time.

[0052] Further preferably, in an embodiment of the present invention, the oxygenation device is an oxygenation disk, the oxygenation disk is a rubber hose, one end is connected to an oxygenation pump, the tail end is closed, and fine holes are opened in the rubber hose at the tail end, the opening length is 2.5 meters, and the hose with holes is coiled on a disc iron rack and fixed to prevent displacement during use.

[0053] Preferably, a shrimp nest is installed in the breeding pool 2, and the shrimp nest is of a tubular structure.

[0054] Further preferably, the shrimp shelter is a cross-shaped black PVC pipe with a pipe orifice diameter of 12 cm and a length of 40 cm and a tire, which can provide hiding places for shrimp larvae.

[0055] Further preferably, nylon mesh sheets are arranged at certain intervals in the seedling rearing pond 2. The nylon mesh sheets are arranged vertically and fixed to the bottom of the seedling rearing pond 2; the nylon mesh sheets can increase the three-dimensional degree of the water body in the seedling rearing pond 2 and provide more attachment points for shrimp larvae.

[0056] Preferably, a skylight is provided on the roof of the greenhouse 1, and a movable sunshade net 11 is installed on the skylight.

[0057] Preferably, the water outlet of the self-purifying sedimentation pond 5 is communicated with the outdoor shrimp larvae culture pond 7, and a bird-proof net is installed on the outdoor shrimp larvae culture pond 7.

[0058] The indoor and outdoor culture method for the shrimp larvae of the narrow-chela crayfish of the present invention comprises the following steps:

[0059] Before the indoor and outdoor culture system for the shrimp larvae of the narrow-chela crayfish is put into use, the seedling rearing pond 2 and the shrimp larvae collection device 3 are soaked with a 5% potassium permanganate solution. After disinfection for 30 minutes, they are rinsed clean with running water.

[0060] The treated qualified culture water is introduced into the seedling rearing pond 2. The height of the overflow pipe 21 is set to 80 cm, and a 20-mesh filter screen is arranged at the top of the overflow pipe 21 to prevent shrimp larvae from swimming out.

[0061] An oxygenation disk is placed at the bottom of the seedling rearing pond 2, and the water body in the seedling rearing pond 2 is oxygenated for 24 hours through the oxygenation disk. During the culture period, the dissolved oxygen in the water is kept at 6 mg / L or above.

[0062] The shrimp shelter is placed in the hatching pond.

[0063] During the indoor culture process, frozen water fleas and finished shrimp milk powder with a protein content of 48% are fed in a 1:1 mixture according to 15% of the weight of the shrimp larvae every day. The feeding is carried out three times at intervals of 8 hours every day. Before feeding, the residual bait and feces from the previous time are cleaned to keep the water quality clean.

[0064] During the culture process, the water temperature in the seedling rearing pond 2 is adjusted through the normal temperature water inlet 22 and the cold water inlet 23 to keep the water temperature at 22 °C; meanwhile, the flow rate of the water outlet 24 of the seedling rearing pond is adjusted to keep the water exchange volume in the seedling rearing pond 2 at 0.36 m 3 / h. When the water level of the seedling rearing pond 2 reaches 80 cm, it overflows from the overflow pipe 21. The 20-mesh filter screen on the overflow pipe 21 can effectively prevent shrimp larvae from swimming out.

[0065] The culture water overflowing from the overflow pipe 21 enters the buffer tank 32, and then flows into the self-purifying sedimentation pond 5 through the drainage channel 4 via a pipeline.

[0066] According to the specific situation, part of the humus is backfilled in the self-purification sedimentation tank 5, beneficial bacteria are added, and a variety of aquatic plants and algae are planted. Through their photosynthesis and the decomposition of various plankton and fungi in the water body, and sunlight irradiation, the water body can be self-purified. After the water quality test is up to standard, the self-purified water passes through the outlet pipe, is filtered by a 20-mesh filter to remove wild fish and eggs of harmful organisms, and then is introduced into the outdoor shrimp breeding pond 7.

[0067] The shrimp fry outdoor breeding pond 7 is disinfected with quicklime before being put into use. Water is introduced into the pond after being exposed to the sun for a week. The interval between the introduction of water into the pond and the shrimp fry breeding in the outdoor pond is at least 7 days, and the coverage rate of aquatic plants reaches 45% to 65%.

[0068] Preferably, it also includes a water reservoir 6 and a disinfection pool 8. The water reservoir 6 is connected to the disinfection pool 8. The disinfection pool 8 is connected to the water inlet pipe of the greenhouse 1 through a regulating valve 81. An ultraviolet lamp 82 is installed in the disinfection pool 8.

[0069] Preferably, the water inlet pipe of the greenhouse 1 is a plurality of pipes, which can be respectively connected to the normal temperature water inlet 22 and the cold water inlet 23 of each seedling pool 2, and each pipe is provided with a temperature control device to provide normal temperature water and cold water according to demand.

[0070] The present invention is described below by means of specific examples.

[0071] Example

[0072] This embodiment adopts the culture system of the present invention to culture stenocheir crayfish fry.

[0073] In this embodiment, on June 12, 2024 (this is the 0th day of hatching), the shrimp fry separated from the mother are placed in the nursery pond 2 for breeding. At this time, the shrimp fry are 0.7-1.0 cm long and weigh 5 grams per 100 fish, with an average of about 0.05 g per fish. A total of 66,000 shrimp fry are released.

[0074] The shrimp fry are fed according to the method of the present invention every day, and the feed feeding amount is increased or decreased according to the specific feed intake of the shrimp fry on that day.

[0075] During the breeding period, water quality testing was performed every 3 days to ensure that the values ​​were maintained at: pH: 7.259-8.732, dissolved oxygen not less than 6 mg / L, ammonia nitrogen: 0.3, nitrite: 0.02-0.05, so that the water in the nursery pool was free of oil film and impurities. If the water quality test data was too far from the standard value, the nursery pool was cleaned by changing water. The water quality measurement data is shown in Table 1. The shrimp seedlings were sampled every 7 days and their growth data were recorded. This embodiment recorded three times, as shown in Tables 2-4.

[0076] Table 1 Water quality measurement data during aquaculture

[0077]

[0078]

[0079] Table 2 First-stage shrimp seedling growth data

[0080]

[0081] Table 3 Second-stage shrimp seedling growth data

[0082]

[0083]

[0084] Table 4 Third-stage shrimp seedling growth data

[0085]

[0086]

[0087] The morphology of 7-day-old crayfish is as Figure 4 shown, and the morphology of 14-day-old crayfish is as Figure 5 shown, and the morphology of 21-day-old crayfish is as Figure 6 shown. After 21 days of age, the body length of the shrimp seedlings reaches between 1.9 and 2.1 cm, and the cultured shrimp seedlings are put into the outdoor shrimp seedling culture pond 7.

[0088] Before putting them in, first disinfect and sun the outdoor shrimp seedling culture pond 7, then introduce the water from the self-purifying sedimentation tank 5, then cultivate the water for 7 days, and continuously conduct water quality tests for 7 days. The water quality test values are kept similar to those of the seedling rearing pond 2. When the waterweed coverage rate in the pond reaches 45% - 65%, the shrimp seedlings can be moved in.

[0089] Shrimp seedling collection process: The shrimp seedlings can be collected after reaching the above specifications.

[0090] First, open the normal temperature water inlet 22 and the cold water inlet 23, adjust the overflow pipe 21, and gradually unscrew each section of the overflow pipe 21 to gradually lower the water level. During the stage of lowering the water level, the water in the seedling rearing pond 2 enters the buffer tank 32. After the buffer tank 32 is filled, the water overflows from the buffer tank 32 and enters the drain 4, flowing into the self-purifying sedimentation tank 5.

[0091] When the water level in the seedling rearing pond 2 drops to 20 cm, remove the overflow pipe 21. The lower water level can slow down the drainage speed and reduce the scouring of the flowing water on the shrimp seedlings. The shrimp seedlings enter the shrimp seedling collection net 31 along with the water flow and are collected. The water in the buffer tank 32 can reduce the scouring of the flowing water at the outlet 24 of the seedling rearing pond on the shrimp seedlings in the shrimp seedling collection net 31, so as to achieve the rapid and low-damage collection of shrimp seedlings.

[0092] Put the collected shrimp fry into the prepared outdoor shrimp fry breeding pond 7, and feed the frozen minced fish and the small granular finished shrimp feed with a protein content of 40% in a 1:1 ratio according to 15% of the shrimp fry weight, and feed them every morning and evening. At the same time, detect the water quality change every day. The specific conditions of the water quality are pH: 7.259 - 8.732, dissolved oxygen content not less than 6mg / L, ammonia nitrogen: 0.3, nitrite: 0.02 - 0.05.

[0093] If the above standard values are exceeded during the breeding period, the water inlet of the outdoor shrimp fry breeding pond 7 can be opened to change the water in the outdoor shrimp fry breeding pond 7 to ensure the water quality is clean.

[0094] The data of the shrimp fry in this embodiment after two months of outdoor breeding in the outdoor shrimp fry breeding pond 7 are shown in Table 5. Among them, the chela length and chela width of the shrimp fry are as Figure 7 shown. In the figure, A is the chela length, B is the antenna length, C is the cephalothorax, and D is the chela width.

[0095] Table 5 Measurement data of shrimp fry after two months of outdoor breeding

[0096]

[0097] According to the above measurement results, it can be seen that by using the method of the present invention, artificial breeding of narrow-chela crayfish fry can be realized, with an overall survival rate between 60% - 65%, a fast growth rate, and an effective reduction in breeding costs.

[0098] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0099] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0100] In the present invention, unless otherwise clearly specified or limited, a first feature being "on" or "under" a second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, a first feature being "above", "over" and "on top of" a second feature may be that the first feature is directly above or obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. A first feature being "under", "below" and "beneath" a second feature may be that the first feature is directly below or obliquely below the second feature, or merely means that the horizontal height of the first feature is less than that of the second feature.

[0101] In the description of the present specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In the present specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of different embodiments or examples.

[0102] In the description of the present invention, it should be noted that, unless otherwise clearly specified or limited, the terms "mounted", "connected" and "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0103] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An indoor and outdoor breeding system for juvenile narrow-clawed crayfish, characterized in that, It includes a greenhouse (1), at least one seedling-raising pond (2), a drainage canal (4) and a self-purifying sedimentation pond (5). The seedling-raising pond (2) is located inside the greenhouse (1), the self-purifying sedimentation pond (5) is located outside the greenhouse (1), and a drainage canal (4) is provided between the self-purifying sedimentation pond (5) and the greenhouse (1). An overflow pipe (21) is installed in each seedling-raising pond (2). The overflow pipe (21) is arranged vertically and its bottom end is communicated with the water outlet (24) of the seedling-raising pond. The water outlet (24) of the seedling-raising pond is communicated with a shrimp seedling collection device (3), and the shrimp seedling collection device (3) is arranged in the drainage canal (4).

2. The indoor and outdoor breeding system for the juvenile shrimp of Cambaroides schrenkii according to claim 1, characterized in that, The shrimp seedling collection device (3) includes a buffer tank (32) and a shrimp seedling collection net (31) located inside the buffer tank (32). The water outlet (24) of the seedling-raising pond is inserted into and fixed to the shrimp seedling collection net (31). The buffer tank (32) is located in the drainage canal (4) and is communicated with the drainage canal (4).

3. The indoor and outdoor breeding system for Cambaroides similis fry according to claim 2, characterized in that, Normal-temperature water inlets (22) and cold-water inlets (23) are provided on the side wall of the seedling-raising pond (2). The normal-temperature water inlets (22) and the cold-water inlets (23) are arranged oppositely at the lower part of the seedling-raising pond (2).

4. The indoor and outdoor breeding system for Cambarellus shufeldtii fry according to claim 2, characterized in that, There are multiple seedling-raising ponds (2), and the multiple seedling-raising ponds (2) are divided into two rows and arranged on both sides of the drainage canal (4) respectively.

5. The indoor and outdoor breeding system for juvenile narrow-chela crayfish according to claim 2, characterized in that, The overflow pipe (21) includes multiple pipe bodies, and each pipe body is connected by a thread. At least one end of each pipe body is equipped with a filter screen.

6. A indoor and outdoor breeding system for Cambaroides similis fry according to any one of claims 1 to 4, characterized in that, An aeration device is installed at the bottom of the seedling-raising pond (2).

7. A narrow-chela crayfish fry indoor and outdoor breeding system according to any one of claims 1 to 4, characterized in that, A shrimp nest is installed in the seedling-raising pond (2), and the shrimp nest is a tubular structure.

8. A narrow-chela crayfish fry indoor and outdoor cultivation system according to any one of claims 1 to 4, characterized in that, A skylight is provided on the roof of the greenhouse (1), and a movable sunshade net (11) is installed on the skylight.

9. A indoor and outdoor breeding system for Cambaroides similis fry according to any one of claims 1 to 4, characterized in that, The water outlet of the self-purifying sedimentation pond (5) is communicated with an outdoor shrimp seedling culture pond (7), and a bird-proof net is installed on the outdoor shrimp seedling culture pond (7).

10. A method for indoor and outdoor cultivation of juvenile narrow-chela crayfish, characterized in that, Using the system according to any one of claims 1 to 9 for cultivation, it includes the following steps: S1. Introduce the cultivation water into each seedling-raising pond (2) and adjust the height of the overflow pipe (21). S2. Place the shrimp seedlings in the seedling-raising pond (2) for indoor cultivation. S3. Transfer the shrimp seedlings after indoor cultivation to the outdoor cultivation area for outdoor cultivation.

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