Experimental device and experimental method for fish fry and spawning in Guanjiang River

Abstract

The present invention provides an experimental device and method for fish fry and spawning suitable for feeding fry from the Guanjiang River. The device comprises a main outlet trough and an auxiliary outlet trough, with a simulated lake pool provided between the main outlet trough and the auxiliary outlet trough. A diversion port on one side of the main outlet trough is connected to one side of the simulated lake pool, and the other side of the simulated lake pool is connected to the head of the auxiliary outlet trough. The tail ends of the main outlet trough and the auxiliary outlet trough are connected to a water collection trough, and the head of the main outlet trough is connected to a water inlet pipe. An arc-shaped isolation net is also provided in the middle of the simulated lake pool, and the isolation net divides the simulated lake pool into a spawning area and a nursery area. This device provides a scientific basis for the rational development and utilization of lake fish resources and is conducive to the formulation of more scientific and reasonable fish management policies. It is also conducive to protecting and restoring the natural ecological environment and promoting the sustainable development of lake fish resources.

Description

Technical Field

[0001] The invention relates to the field of fish fry introduction experiments in Guanjiang River, in particular to an experimental device and an experimental method suitable for fish fry introduction and spawning in Guanjiang River. Background Art

[0002] River fry introduction refers to the practice of opening sluice gates during the fish fry season, when fish fry are abundant and concentrated, to alter the water flow, allowing fry or young fish to enter the lake upstream or upstream to grow and fatten. This practice is primarily used in lakes where dams and gates block the natural flow between rivers and lakes. The main methods include upstream and downstream inflow. Upstream inflow involves river water entering the lake, bringing fry with it. Backward inflow involves lake water flowing into the river, exploiting the fry's habit of swimming upstream to lure them into the lake.

[0003] In the past, the stocking of fish in Guanjiang River could not prevent egg-eating fish from entering the lake, so the fish fry and eggs were easily threatened by egg-eating fish. At present, the living environment of the fish fry and the hatching rate of the fish schools in Guanjiang River stocking cannot be seen very intuitively, and it is impossible to select a good lake for stocking. The structure of the lake will also affect the spawning effect of the fish schools and the hatching rate of the eggs. Some lakes use the situation where fish schools and eggs coexist, which makes it possible for some fish to eat the eggs. The hatching rate of fish eggs is low, and it is necessary to redesign a lake form to adapt to the living and development environment of the fish fry. Therefore, the study of increasing the hatching rate of fish schools and eggs during the stocking of fish in Guanjiang River has important practical significance and can provide certain theoretical support for engineering scheduling. Summary of the Invention

[0004] The main purpose of the invention is to provide an experimental device and an experimental method for fish fry and spawning suitable for the frying of the Guanjiang River, so as to solve the problem that the structure of the lake will also affect the spawning effect of the fish school and the hatching rate of the fish eggs.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is: an experimental device suitable for frying and spawning fish in Guanjiang River, comprising a main water outlet and an auxiliary water outlet, a simulated lake pool is provided between the main water outlet and the auxiliary water outlet, a diversion port on one side of the main water outlet is connected to one side of the simulated lake pool, the other side of the simulated lake pool is connected to the head of the auxiliary water outlet, the tail ends of the main water outlet and the auxiliary water outlet are connected to the water collecting tank, and the head of the main water outlet is connected to the water inlet pipe;

[0006] An arc-shaped isolation net is also provided in the middle of the simulated lake pool, which divides the simulated lake pool into a spawning area and a nursery area.

[0007] In the preferred embodiment, the simulated lake pool is circular in structure, with one side of the isolation net and the spawning area forming a circular structure, and the other side of the isolation net and the nursery area forming a fan-shaped structure;

[0008] The pore size of the isolation net is 5-6mm.

[0009] In the preferred embodiment, a third isolation net is provided between the seedling raising area and the auxiliary water outlet trough, a third gate is provided between the auxiliary water outlet trough and the water collection trough, and a fourth isolation net is provided between the third gate and the third isolation net;

[0010] The pore size of the third isolation net is 1-2 mm.

[0011] In the preferred embodiment, multiple shooting covers are provided inside the seedling raising area and the auxiliary water outlet trough. The shooting covers are transparent in structure and cameras are provided inside the shooting covers.

[0012] A first surveillance camera is provided on one side of the fourth isolation net, and the first surveillance camera faces the surface of the fourth isolation net. The fourth isolation net is made of textile fabric, and the gap between the textile fabrics is 1-2 mm;

[0013] A second temperature sensor is also provided inside the nursery area;

[0014] A second flow rate sensor is also provided on one side of the first monitoring camera.

[0015] In the preferred embodiment, at least two shooting covers are provided inside the seedling raising area, and a hoist is provided on the shooting cover. The hoist has a lifting rod connected to the camera, and the hoist is driven by a gear rack, and the gear of the hoist is meshed with the rack on the lifting rod;

[0016] The camera adopts multi-angle rotating camera;

[0017] The plurality of cameras are electrically connected to the monitoring center.

[0018] In the preferred embodiment, a first gate is provided at the head end of the main water outlet trough, a first isolation net is provided on one side of the first gate, a second gate is provided between the tail end of the main water outlet trough and the water collection trough, a second isolation net is provided on one side of the second gate, and the second isolation net is provided on one side of the diversion port, and the diversion port is located between the second isolation net and the first isolation net;

[0019] The pore size of the second isolation net is 2-3mm, and the pore size of the third isolation net is 4-5mm;

[0020] A first flow rate sensor and a second temperature sensor are also provided inside the main water outlet trough.

[0021] In the preferred embodiment, a baffle is provided inside the water collecting tank, the baffle being lower than the height of the top of the water collecting tank, the tank body on one side of the baffle being connected to the main water outlet tank, and the other side being connected to the auxiliary water outlet tank;

[0022] The trough on one side of the baffle is connected to the clean water tank, which is connected to the water inlet pipe through a first water pump, and a first valve is provided on one side of the first water pump. The hot water tank is connected to the water inlet pipe through a second water pump, and a second valve is provided on one side of the second water pump.

[0023] The other side of the baffle is connected to the river inlet trough, and a third gate is provided between the river inlet trough and the water collection trough.

[0024] In the preferred solution, the gate adopts an automatic electric lifting gate, and the gate adopts a sinking gate;

[0025] The isolation net adopts a plug-in installation structure, and both sides of the isolation net are slidably connected to the trough body.

[0026] The method includes:

[0027] S1: The water inlet pipe starts to inject water into the main water outlet trough. The second gate at the end of the main water outlet trough and the third gate at the end of the auxiliary water outlet trough are closed. The water levels in the main water outlet trough, the auxiliary water outlet trough and the simulated lake pool reach the preset value. The second gate and the third gate are opened to adjust and control the water flow rate in the main water outlet trough and the auxiliary water outlet trough.

[0028] S2, by the first flow sensor and the second flow sensor monitoring main water outlet and secondary water outlet inside water velocity, the first temperature sensor and the second temperature sensor monitoring inside water temperature, after water temperature and water velocity arrive preset value, the second isolation net and the first isolation net of main water outlet are closed, also close the 3rd isolation net and the 4th isolation net, choose 200-400 tail experiment fish to put into main water outlet;

[0029] S3, the second gate is closed, and the opening size of the third gate remains unchanged. The direction of water flow gradually guides the experimental fish into the spawning area, controls the water temperature inside the spawning area, feeds the experimental fish, and the experimental fish gradually spawn inside the spawning area. Under the condition of water flow, some fish eggs will pass through the isolation net to reach the inside of the nursery area, and some fish eggs will also enter and stick to the isolation net;

[0030] S4, multiple second surveillance cameras inside the seedling raising area take photos and conduct video surveillance inside the seedling raising area;

[0031] The second surveillance camera captures the density of floating fish eggs in the water of the nursery area. It also captures the ground and walls of the nursery area to observe the coverage of the nursery. The second surveillance camera takes multiple photos.

[0032] Use visual recognition technology to identify the fish eggs in the photos, calculate the fish egg coverage on the photos, and record the fish egg coverage at each location;

[0033] S5, controlling the temperature inside the nursery area of ​​the simulated lake pond, and the fish eggs inside the nursery area begin to hatch;

[0034] S6, utilize the second monitoring camera to start monitoring the inside of the nursery area, observe the seedling raising situation inside the nursery area, the second monitoring camera starts to shoot the nursery area ground position and wall surface, observe the coverage rate of fry;

[0035] Use visual recognition technology to identify the fry in the photos, calculate the coverage of the fry on the photos, and record the coverage of the fish eggs at each location;

[0036] According to steps S4-S6, the collected fish egg data and fry data are analyzed to obtain the spawning amount of the fish school and the hatching rate of the fish eggs.

[0037] S7. Open the third isolation net, and the third gate is opened and closed to two-fifths of the gate. The flow rate inside the auxiliary outlet trough is accelerated, and the fry will enter the auxiliary outlet trough. The fry will gradually gather at the position of the fourth isolation net. The fish attraction light behind the fourth isolation net is turned on, and the fry will begin to swim toward the position of the fourth isolation net and gather on the fourth isolation net.

[0038] S8, the surface of the fourth isolation net is coated with fish food, the fry will approach the fourth isolation net and feed on the fourth isolation net, the first surveillance camera will shoot the fry on the fourth isolation net, shoot the coverage of the fry on the fourth isolation net, and observe the coverage and size of the fry;

[0039] S9. Analyze the probability of the number of fry and the number of experimental fish to obtain the hatching rate of fry and the spawning amount of fish eggs. Analyze the health status of the fry based on the state diagram of the fry on the fourth isolation net, and record the analyzed data.

[0040] S10. Open the third gate. The pool on the side of the water collection tank near the auxiliary outlet tank begins to be gradually separated from the pool of the main outlet tank. Open the fourth isolation net and slowly open the third gate to the half position. The fry begin to enter the water collection tank and swim from the water collection tank to the river inlet tank. The river inlet tank gradually discharges the fish into the river and lake, completing the experiment.

[0041] The present invention provides an experimental device and an experimental method for fish fry and spawning suitable for Guanjiang River frying. A simulated lake pool is designed to separate fish schools and fish eggs. The fish eggs flow to the frying area in the form of water flow, which separates the fish eggs and adult fish. The hatching rate of the fish eggs is observed, and the survival rate of the fish eggs is provided. According to our device structure, this device structure can be used to transform lakes. If the lake also has this type of filtering structure, the fish eggs and fry can be protected in the lake and will not be eaten by egg-eating fish.

[0042] It provides a scientific basis for the rational development and utilization of lake fishery resources, is conducive to the formulation of more scientific and reasonable fishery management policies, is conducive to protecting and restoring the natural ecological environment, and promotes the sustainable development of lake fishery resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The present invention will be further described below with reference to the accompanying drawings and examples:

[0044] Figure 1 It is a schematic diagram of the overall process of the present invention;

[0045] Figure 2 This is a diagram of the overall appearance of the experimental device of the present invention;

[0046] Figure 3 This is a main structural diagram of the shooting cover of the present invention;

[0047] Figure 4 This is a structural diagram of the installation position of the first surveillance camera of the present invention;

[0048] Figure 5 This is a structural diagram of the picture taken by the first surveillance camera of the present invention.

[0049] In the figure: simulated lake pool 1; isolation net 101; spawning area 102; nursery area 103; main water outlet trough 2; water inlet pipe 3; first gate 4; first isolation net 5; first valve 6; second valve 7; first flow rate sensor 8; first temperature sensor 9; diversion port 10; second isolation net 11; first water pump 12; second gate 13; clean water tank 14; water collection tank 15; baffle 1501; hot water tank 16; second water pump 17; third isolation net 18; monitoring center 19; auxiliary water outlet trough 20; second flow rate sensor 21; first monitoring camera 22; fourth isolation net 23; third gate 24; third gate 25; river inlet trough 26; second temperature sensor 27; shooting cover 28; lifting rod 2801; hoist 2802; second monitoring camera 29; fish attracting light 30. DETAILED DESCRIPTION

[0050] Example 1

[0051] like Figures 1 to 5As shown, an experimental device suitable for frying and spawning of fish in Guanjiang River includes a main outlet trough 2 and an auxiliary outlet trough 20. A simulated lake pool 1 is provided between the main outlet trough 2 and the auxiliary outlet trough 20. A diversion port 10 on one side of the main outlet trough 2 is connected to one side of the simulated lake pool 1, and the other side of the simulated lake pool 1 is connected to the head of the auxiliary outlet trough 20. The tails of the main outlet trough 2 and the auxiliary outlet trough 20 are connected to the water collection trough 15, and the head of the main outlet trough 2 is connected to the water inlet pipe 3. An arc-shaped isolation net 101 is also provided in the middle of the simulated lake pool 1. The isolation net 101 divides the simulated lake pool 1 into a spawning area 102 and a nursery area 103. A simulated lake pool 1 is designed to separate fish schools and fish eggs. The fish eggs flow to the nursery area 103 in the form of water flow, separating the fish eggs from adult fish. The hatching rate of the fish eggs is observed and the survival rate of the fish eggs is provided.

[0052] In the preferred embodiment, the simulated lake pool 1 has a circular structure, one side of the isolation net 101 forms a circular structure with the spawning area 102, and the other side of the isolation net 101 forms a fan-shaped structure with the nursery area 103; the circular structure makes it convenient for fish to go downstream and for fish eggs to enter the designated position, and there will be no squeeze due to the exchange of positions.

[0053] The aperture of the isolation net 101 is 5-6 mm, so that most of the fish eggs can enter the nursery area 103.

[0054] In the preferred embodiment, a third isolation net 18 is provided between the nursery area 103 and the auxiliary water outlet trough 20, a third gate 24 is provided between the auxiliary water outlet trough 20 and the water collection trough 15, and a fourth isolation net 23 is provided between the third gate 24 and the third isolation net 18; the third isolation net 18 confines the fish eggs inside the nursery area 103, and the fish eggs inside the nursery area 103 are hatched into fish.

[0055] The aperture of the third isolation net 18 is 1-2 mm. The fish eggs are confined inside the nursery area 103.

[0056] In the preferred embodiment, a plurality of shooting covers 28 are provided inside the seedling raising area 103 and the auxiliary water outlet trough 20. The shooting covers 28 are transparent in structure as a whole, and cameras are provided inside the shooting covers 28; the cameras are used to observe the internal conditions.

[0057] A first surveillance camera 22 is provided on one side of the fourth isolation net 23. The first surveillance camera 22 faces the surface of the fourth isolation net 23. The fourth isolation net 23 is made of textile fabric with a gap of 1-2 mm.

[0058] A second temperature sensor 27 is also provided inside the nursery area 103 ; the fourth isolation net 23 is made of textile cloth and serves to prevent the fry from entering the rear water collection tank 15 .

[0059] A second flow rate sensor 21 is further provided on one side of the first monitoring camera 22 .

[0060] In a preferred embodiment, at least two camera covers 28 are provided within the nursery area 103. Each camera cover 28 is provided with a hoist 2802. A lifting rod 2801 of the hoist 2802 is connected to a camera. The hoist 2802 is driven by a rack and pinion mechanism, with the gear of the hoist 2802 meshing with the rack on the lifting rod 2801. The camera is a multi-angle rotating camera, and the multiple cameras are electrically connected to the monitoring center 19, facilitating multi-angle observation of underwater conditions.

[0061] In the preferred embodiment, a first gate 4 is provided at the head end of the main water outlet trough 2, a first isolation net 5 is provided on one side of the first gate 4, a second gate 13 is provided between the tail end of the main water outlet trough 2 and the water collecting trough 15, a second isolation net 11 is provided on one side of the second gate 13, and the second isolation net 11 is arranged on one side of the diversion port 10, and the diversion port 10 is located between the second isolation net 11 and the first isolation net 5; it is convenient for fish to enter the spawning area 102 to lay eggs.

[0062] The aperture of the second isolation net 11 is 2-3 mm, and the aperture of the third isolation net 11 is 4-5 mm; it plays the role of isolating fish schools.

[0063] A first flow rate sensor 8 and a second temperature sensor 9 are further provided inside the main water outlet trough 2 .

[0064] In the preferred embodiment, a water baffle 1501 is provided inside the water collecting tank 15, and the water baffle 1501 is lower than the height of the top of the water collecting tank 15. The tank body on one side of the water baffle 1501 is connected with the main water outlet tank 2, and the other side is connected with the auxiliary water outlet tank 20; the water baffle 1501 divides the water collecting tank 15. When the third gate 25 on one side of the water collecting tank 15 is not opened, the water inside the water collecting tank 15 is filtered through the clean water tank 14 and then recycled. When the third gate 25 is opened, the water on one side of the water collecting tank 15 will be diverted, and the water on both sides flows in different directions.

[0065] The tank on one side of the baffle 1501 is connected to the clean water tank 14, which is connected to the water inlet pipe 3 via the first water pump 12. A first valve 6 is provided on one side of the first water pump 12. The hot water tank 16 is connected to the water inlet pipe 3 via the second water pump 17. A second valve 7 is provided on one side of the second water pump 17.

[0066] The other side of the baffle 1501 is connected to the river inlet trough 26 , and a third gate 25 is provided between the river inlet trough 26 and the water collection tank 15 .

[0067] In the preferred solution, the gate adopts an automatic electric lifting gate, and the gate adopts a sinking gate;

[0068] The isolation net adopts a plug-in installation structure, and both sides of the isolation net are slidably connected to the trough body.

[0069] According to our equipment structure, it can be used to transform lakes. If there is also this type of filtering structure in the lake, then fish eggs and fry can be protected in the lake and not be eaten by egg-eating fish.

[0070] Example 2

[0071] Further illustrate with reference to Example 1, Figure 1-5 In the structure shown, S1 and the water inlet pipe 3 begin to inject water into the main water outlet trough 2, the second gate 13 at the end of the main water outlet trough 2 and the third gate 24 at the end of the auxiliary water outlet trough 20 are closed, and the water levels in the main water outlet trough 2, the auxiliary water outlet trough 20 and the simulated lake pool 1 reach the preset value; the second gate 13 and the third gate 24 are opened to adjust and control the water flow rate in the main water outlet trough 2 and the auxiliary water outlet trough 20;

[0072] S2, the water flow rate inside the main water outlet 2 and the auxiliary water outlet 20 is monitored by the first flow rate sensor 8 and the second flow rate sensor 21, and the first temperature sensor 9 and the second temperature sensor 27 monitor the internal water temperature. After the water temperature and the water flow rate reach the preset values, the second isolation net 11 and the first isolation net 5 of the main water outlet 2 are closed, and the third isolation net 18 and the fourth isolation net 23 are also closed. 200-400 experimental fish are selected and placed in the main water outlet 2;

[0073] S3. Close the second gate 13 and keep the opening size of the third gate 24 unchanged. The direction of water flow gradually guides the experimental fish into the spawning area 102, controls the water temperature inside the spawning area 102, and feeds the experimental fish. The experimental fish gradually spawn in the spawning area 102. Under the condition of water flow, some fish eggs will pass through the isolation net 101 and reach the inside of the nursery area 103, and some fish eggs will also enter and adhere to the isolation net 101. The 200-400 experimental fish are all artificially fed, and spawning is also achieved with the assistance of the experimenter. The experimental fish can reach a level of spawning that is comparable to that of wild fish.

[0074] S4, multiple second monitoring cameras 29 inside the seedling raising area 103 take photos and conduct video monitoring of the interior of the seedling raising area 103;

[0075] The second monitoring camera 29 photographs the density of floating fish eggs in the water of the nursery area 103, and also photographs the ground position and wall surface of the nursery area 103 to observe the coverage rate of the nursery. The second monitoring camera 29 takes multiple photos;

[0076] Use visual recognition technology to identify the fish eggs in the photos, calculate the fish egg coverage on the photos, and record the fish egg coverage at each location;

[0077] S5, control the temperature inside the nursery area 103 of the simulated lake pond 1, and the fish eggs inside the nursery area 103 begin to hatch;

[0078] S6, using the second monitoring camera 29 to start monitoring the inside of the nursery area 103, observe the seedling situation inside the nursery area 103, the second monitoring camera 29 starts to shoot the ground position and wall surface of the nursery area 103 to observe the coverage rate of the fry;

[0079] Use visual recognition technology to identify the fry in the photos, calculate the coverage of the fry on the photos, and record the coverage of the fish eggs at each location;

[0080] According to steps S4-S6, the collected fish egg data and fry data are analyzed to obtain the spawning amount of the fish school and the hatching rate of the fish eggs.

[0081] S7. Open the third isolation net 18 and open or close the third gate 24 to two-fifths of its original size. This accelerates the flow rate inside the auxiliary outlet trough 20, causing the fry to enter the auxiliary outlet trough 20 and gradually gather at the fourth isolation net 23. The fish attracting light 30 behind the fourth isolation net 23 is turned on, causing the fry to swim toward the fourth isolation net 23 and gather on it.

[0082] S8. The surface of the fourth isolation net 23 is coated with fish food. The fry will approach the fourth isolation net 23 and feed on the fourth isolation net 23. The first monitoring camera 22 photographs the fry on the fourth isolation net 23 to measure the coverage of the fry on the fourth isolation net 23 and observe the coverage and size of the fry.

[0083] S9, the probability of the number of fry and the number of experimental fish are analyzed to obtain the hatching rate of the fry and the spawning amount of the fish eggs. According to the state diagram of the fry on the fourth isolation net 23, the health status of the fry is analyzed and the analyzed data is recorded;

[0084] S10. Open the third gate 25. The pool of the water collection tank 15 near the auxiliary outlet tank 20 begins to be gradually separated from the pool of the main outlet tank 2. Open the fourth isolation net 23. Slowly open the third gate 24 to the half position. The fry begin to enter the water collection tank 15 and swim from the water collection tank 15 to the river inlet tank 26. The river inlet tank 26 gradually discharges the fish into the river and lake, completing the experiment.

[0085] After the fry is grown up, it is discharged into the rivers and lakes by entering the river tank 26, and plays the effect of releasing the fish. The river tank 26 can also enter the rivers and lakes through underground passages.

[0086] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The scope of protection of the present invention shall be the technical solutions set forth in the claims, including equivalent alternatives to the technical features of the technical solutions set forth in the claims. In other words, equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. An experimental device for fish fry and spawning suitable for Guanjiang River frying, characterized by: Including main A water outlet trough (2) and an auxiliary water outlet trough (20), a simulated lake pool (1) is provided between the main water outlet trough (2) and the auxiliary water outlet trough (20), a diversion port (10) on one side of the main water outlet trough (2) is connected to one side of the simulated lake pool (1), the other side of the simulated lake pool (1) is connected to the head of the auxiliary water outlet trough (20), the tails of the main water outlet trough (2) and the auxiliary water outlet trough (20) are connected to the water collecting trough (15), and the head of the main water outlet trough (2) is connected to the water inlet pipe (3); An arc-shaped isolation net (101) is also provided in the middle of the simulated lake pool (1), and the isolation net (101) divides the simulated lake pool (1) into a spawning area (102) and a nursery area (103); The simulated lake pool (1) is a circular structure, one side of the isolation net (101) forms a circular structure with the spawning area (102), and the other side of the isolation net (101) forms a fan-shaped structure with the nursery area (103); The aperture of the isolation net (101) is 5-6 mm; A third isolation net (18) is provided between the seedling raising area (103) and the auxiliary water outlet trough (20), a third gate (24) is provided between the auxiliary water outlet trough (20) and the water collecting trough (15), and a fourth isolation net (23) is provided between the third gate (24) and the third isolation net (18); The pore size of the third isolation net (18) is 1-2 mm; A plurality of shooting covers (28) are provided inside the seedling raising area (103) and the auxiliary water outlet trough (20). The shooting covers (28) are transparent in structure as a whole, and cameras are provided inside the shooting covers (28); A first monitoring camera (22) is provided on one side of the fourth isolation net (23), and the first monitoring camera (22) faces the surface of the fourth isolation net (23). The fourth isolation net (23) is made of textile fabric, and the gap between the textile fabrics is 1-2 mm. A second temperature sensor (27) is also provided inside the seedling raising area (103); A second flow rate sensor (21) is also provided on one side of the first monitoring camera (22); At least two shooting covers (28) are provided inside the seedling raising area (103), and a hoist (2802) is provided on the shooting cover (28). The hoist (2802) has a lifting rod (2801) connected to the camera. The hoist (2802) is driven by a gear rack, and the gear of the hoist (2802) is meshed with the rack on the lifting rod (2801); The camera adopts multi-angle rotating camera; The plurality of cameras are electrically connected to a monitoring center (19); A first gate (4) is provided at the head end of the main water outlet trough (2), a first isolation net (5) is provided on one side of the first gate (4), a second gate (13) is provided between the tail end of the main water outlet trough (2) and the water collecting trough (15), a second isolation net (11) is provided on one side of the second gate (13), the second isolation net (11) is provided on one side of the diversion port (10), and the diversion port (10) is located between the second isolation net (11) and the first isolation net (5); The aperture of the second isolation net (11) is 2-3 mm, and the aperture of the second isolation net (11) is 4-5 mm; A first flow rate sensor (8) and a second temperature sensor are also provided inside the main water outlet trough (2); A water baffle (1501) is provided inside the water collecting trough (15), and the water baffle (1501) is lower than the height of the top of the water collecting trough (15). The trough body on one side of the water baffle (1501) is connected to the main water outlet trough (2), and the other side is connected to the auxiliary water outlet trough (20); The trough on one side of the water baffle (1501) is connected to the clean water tank (14), the clean water tank (14) is connected to the water inlet pipe (3) via the first water pump (12), and a first valve (6) is provided on one side of the first water pump (12); the hot water tank (16) is connected to the water inlet pipe (3) via the second water pump (17), and a second valve (7) is provided on one side of the second water pump (17); The other side of the baffle (1501) is communicated with the river inlet trough (26), and a third gate is provided between the river inlet trough (26) and the water collecting trough (15).

2. A kind of experimental device for fish fry and spawning applicable to Guanjiang Namiao according to claim 1, characterized in that: The gate adopts automatic electric lifting gate and the gate adopts sinking gate; The isolation net adopts a plug-in installation structure, and both sides of the isolation net are slidably connected to the trough body.

3. according to claim 2 a kind of experimental method that is applicable to the experimental device of fish fry and spawning of Guanjiang River, it is characterized in that: The method includes: S1, the water inlet pipe (3) starts to inject water into the main water outlet trough (2), the second gate (13) at the end of the main water outlet trough (2) and the third gate (24) at the end of the auxiliary water outlet trough (20) are closed, and the water levels inside the main water outlet trough (2), the auxiliary water outlet trough (20) and the simulated lake pool (1) reach the preset value; the second gate (13) and the third gate (24) are opened to adjust and control the water flow rate inside the main water outlet trough (2) and the auxiliary water outlet trough (20); S2, monitoring the water flow rate inside the main water outlet trough (2) and the auxiliary water outlet trough (20) through the first flow rate sensor (8) and the second flow rate sensor (21), monitoring the water temperature inside the first temperature sensor and the second temperature sensor (27), after the water temperature and the water flow rate reach the preset value, the second isolation net (11) and the first isolation net (5) of the main water outlet trough (2) are closed, and the third isolation net (18) and the fourth isolation net (23) are also closed, and 200-400 experimental fish are selected and put into the main water outlet trough (2); S3, closing the second gate (13), keeping the opening size of the third gate (24) unchanged, gradually guiding the experimental fish into the spawning area (102) in the direction of water flow, controlling the water temperature in the spawning area (102), feeding the experimental fish, and gradually spawning the experimental fish in the spawning area (102). Under the condition of water flow, some fish eggs will pass through the isolation net (101) to reach the nursery area (103), and some fish eggs will also enter and adhere to the isolation net (101); S4, multiple second monitoring cameras (29) inside the seedling raising area (103) take photos and video monitoring of the inside of the seedling raising area (103); The second monitoring camera (29) photographs the density of floating fish eggs in the water of the nursery area (103), and also photographs the ground position and wall surface of the nursery area (103) to observe the coverage rate of the nursery. The second monitoring camera (29) takes multiple photos; Use visual recognition technology to identify the fish eggs in the photos, calculate the fish egg coverage on the photos, and record the fish egg coverage at each location; S5, controlling the temperature inside the nursery area (103) of the simulated lake pond (1), and the fish eggs inside the nursery area (103) begin to hatch; S6, using the second monitoring camera (29) to start monitoring the inside of the seedling raising area (103), observing the seedling raising situation inside the seedling raising area (103), and the second monitoring camera (29) starts to shoot the ground position and wall surface of the seedling raising area (103) to observe the coverage rate of the fry; Use visual recognition technology to identify the fry in the photos, calculate the coverage of the fry on the photos, and record the coverage of the fish eggs at each location; According to steps S4-S6, the collected fish egg data and fry data are analyzed to obtain the spawning amount of the fish school and the hatching rate of the fish eggs; S7, open the third isolation net (18), the opening and closing size of the third gate (24) is 2 / 5 of the gate, the flow rate inside the auxiliary outlet trough (20) is accelerated, the fry will enter the auxiliary outlet trough (20), the fry will gradually gather at the position of the fourth isolation net (23), the fish attracting light (30) behind the fourth isolation net (23) is turned on, the fry begin to swim towards the position of the fourth isolation net (23), and the fry will gather on the fourth isolation net (23); S8, the surface of the fourth isolation net (23) is coated with fish food, the fry will approach the fourth isolation net (23) and feed on the fourth isolation net (23), the first monitoring camera (22) takes pictures of the fry on the fourth isolation net (23), takes pictures of the coverage rate of the fry on the fourth isolation net (23), and observes the coverage rate of the fry and the size of the fry; S9, the probability of the number of fry and the number of experimental fish were analyzed to obtain the hatching rate of fry and the spawning amount of fish eggs. Based on the state diagram of fry on the fourth isolation net (23), the health status of fry was analyzed and the analyzed data were recorded; S10, open the third gate, the pool of the water collection tank (15) near the auxiliary outlet tank (20) begins to be gradually separated from the pool of the main outlet tank (2), open the fourth isolation net (23), slowly open the third gate (24) to the half position, the fry begin to enter the water collection tank (15), and start to swim from the water collection tank (15) to the river inlet tank (26), and the river inlet tank (26) gradually discharges the fish into the river, completing the experiment.

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