Artificial ecological hatching device for gobiocypris rarus fertilized eggs

Abstract

The application provides a big-nose gobi-ovum simulation ecological hatching device, which comprises a hatcher floating on the water surface and a rotating mechanism, the hatcher comprises a hatching net disc and a buoyancy plate, the hatching net disc is freely rotatably connected to one side of the rotating mechanism, a plurality of paddles are annularly and uniformly arranged on the outer side wall of the hatching net disc, the buoyancy plate is annularly arranged on the outer side wall of the hatching net disc and located above the paddles, the hatching net disc is provided with buoyancy by the buoyancy plate, the rotating mechanism drives the hatching net disc to drift around the circumference thereof on the water surface, water flow is exchanged with water in the hatching net disc and is disturbed, the impact force of the water flow is reduced by the hatching net disc, the phenomenon of egg membrane rupture is reduced, and in the drifting process of the hatching net disc, the water flow impacts the paddles, the hatching net disc rotates, the four peripheral side walls of the hatching net disc are uniformly exchanged with the water flow, the big-nose gobi-ovum is dispersed in the hatching net disc, the big-nose gobi-ovum is prevented from gathering together to cause oxygen deficiency, and the hatching rate is improved.

Description

Technical Field

[0001] This invention relates to the field of hatching technology for fertilized eggs of the big-nosed gudgeon, specifically to a simulated ecological hatching device for fertilized eggs of the big-nosed gudgeon. Background Technology

[0002] Big-nosed catfish ( Rhinogobio nasutus The large-nosed goby (Siniperca spp.), belonging to the order Cypriniformes, family Cyprinidae, and genus Siniperca, is a benthic carnivorous fish that primarily feeds on benthic animals and small fish. In recent years, due to factors such as the obstruction of its migration routes and habitat loss caused by hydroelectric development, coupled with the deterioration of the aquatic environment and overfishing, the wild population of the large-nosed goby is declining rapidly and it has fallen into an endangered state. In 2021, the large-nosed goby was listed as a Class II protected wild animal in China.

[0003] The existing methods for protecting and restoring the population of large-nosed goby mainly involve artificial breeding. In artificial breeding technology, seedlings are cultivated by artificial incubation. The fertilized eggs of large-nosed goby are placed under water temperature (22.0±1.0℃) and pH (8.61~8.86) conditions to develop into larvae. After the larvae are artificially bred to a certain size, the wild population of large-nosed goby can be restored through stock enhancement and release.

[0004] Currently, artificial breeding mainly uses incubation buckets and tanks to incubate fertilized eggs of the big-nosed goby. Because big-nosed goby fertilized eggs are drifting eggs, they swell significantly after absorbing water, their specific gravity is slightly greater than water, and their periocular space is large with a thin egg membrane. During incubation in still water, the fertilized eggs will sink to the bottom and pile up, easily causing oxygen deficiency and rotting. To prevent the fertilized eggs from sinking and piling up to the bottom, existing technologies use circulating water pipes or aeration pipes at the bottom of the incubation buckets or tanks to maintain dynamic incubation of the fertilized eggs, using water flow to suspend the fertilized eggs in the water. However, during dynamic incubation, the outlet of the circulating water pipe and the exhaust port of the aeration pipe will generate a large impact force on the water flow, which can easily rupture the egg membrane of the fertilized eggs, resulting in a low hatching rate. Summary of the Invention

[0005] In view of this, it is necessary to provide a simulated ecological incubation device for fertilized eggs of the big-nosed gudgeon to solve the technical problem that the fertilized eggs of the big-nosed gudgeon are prone to hypoxia or rupture during the incubation process, resulting in a low hatching rate.

[0006] The technical solution adopted by this invention to solve its technical problem is:

[0007] A simulated ecological incubation device for fertilized eggs of the large-nosed gudgeon includes an incubator floating on the water surface and a rotating mechanism. The incubator includes an incubation net tray and a buoyancy plate arranged in parallel for incubating the fertilized eggs. The incubation net tray is rotatably connected to one side of the rotating mechanism. Several paddles are evenly distributed in a ring on the outer wall of the incubation net tray. The buoyancy plate is arranged in a ring on the outer wall of the incubation net tray and is located above the paddles. The buoyancy plate provides buoyancy to the incubation net tray, so that the upper end of the incubation net tray floats on the water surface and the lower end of the incubation net tray remains underwater. The rotating mechanism drives the incubation net tray to drift around its circumference on the water surface, allowing water to flow through the incubation net tray, exchanging with the water in the incubation net tray, and disturbing the fertilized eggs of the large-nosed gudgeon in the incubation net tray to keep them floating. During the drifting process, the water flow impacts the paddles, which enables the incubation net tray to rotate.

[0008] Preferably, the inner bottom of the incubation tray has a wavy curved surface structure.

[0009] Preferably, the rotating mechanism includes a column, a rotating bushing, a drive motor, and a connecting arm. The column is vertically fixed in the water, the drive motor is fixed to the top of the column, the rotating bushing is coaxially and rotatably fitted onto the column and close to the drive motor, a large gear is coaxially arranged on the outer wall of the rotating bushing, and a small gear that meshes with the large gear is arranged on the output shaft of the drive motor. One end of the connecting arm is connected to the rotating bushing, and the other end extends freely outward. A bearing seat is arranged at the extended end, and the hatching net is rotatably mounted on the bearing seat. The drive motor drives the rotating bushing to rotate, and the connecting arm drives the hatching net to drift around the circumference of the column on the water surface.

[0010] Preferably, the connecting arm includes a main arm and a secondary arm. One end of the main arm is pinned to a rotating bushing and can rotate freely up and down. One end of the secondary arm is pinned to the other end of the main arm away from the rotating bushing, and the other end extends freely outward along the main arm and can rotate freely up and down. The bearing seat is pinned to the end of the secondary arm away from the main arm. The rotating bushing drives the hatching net tray to drift around the column on the water surface through the main arm and the secondary arm. During the drifting process, the main arm and the secondary arm can adaptively swing up and down according to the change of water level.

[0011] Preferably, there are multiple sets of connecting arms, evenly distributed around the circumference of the rotating shaft sleeve, and multiple incubators, which are arranged corresponding to the connecting arms.

[0012] Preferably, the simulated ecological incubation device for fertilized eggs of the big-nosed gudgeon further includes a spraying device, which includes a spray head and a water pump. The spray head is mounted above the water surface and located on one side of the rotating mechanism. The input end of the water pump is connected to a water source, and the output end of the water pump is connected to the spray head. During the circular drifting process driven by the rotating mechanism, each incubator passes under the spray head in sequence, and the spray head sprays each incubator in sequence.

[0013] Preferably, the simulated ecological incubation device for fertilized eggs of the big-nosed gudgeon further includes a circulating incubation pool, the incubator and the rotating mechanism are arranged in the circulating incubation pool, the spray head is erected above the water surface in the circulating incubation pool, and the input end of the water pump is connected to the circulating incubation pool to transport the water source in the circulating incubation pool to the spray head for circulating spraying.

[0014] Preferably, the circulating incubation pool is circular, with a water filtration device installed on the outside of the pool, a drain pipe installed at the bottom of the pool, and a water inlet pipe installed on the upper edge of the pool. The inlet of the water filtration device is connected to the drain pipe, and the outlet of the water filtration device is connected to the inlet pipe. A circulation pump is installed at the outlet of the water filtration device. The drain pipe discharges water from the circulating incubation pool into the water filtration device for filtration. The filtered water is then pumped to the inlet pipe by the circulation pump. The outlet of the inlet pipe is tilted towards the water surface in the circulating incubation pool to spray water, using the impact force of the water to make the water in the pool flow in a circular motion, and the direction of the water flow is opposite to the drift direction of the incubator.

[0015] Preferably, a protective cover with an upper opening is fixedly fitted on the rotating bushing. The protective cover is installed below the large gear and the small gear, and surrounds the large gear and the small gear.

[0016] Preferably, an oxygenation pump is also provided on the outside of the circulating incubation tank, and an oxygen pipe is provided in the bottom annular disc of the circulating incubation tank. The oxygen output end of the oxygenation pump is connected to the oxygen pipe to oxygenate the circulating incubation tank.

[0017] As can be seen from the above technical solution, the simulated ecological incubation device for fertilized eggs of the large-nosed gudgeon provided in this application, by freely rotatably connecting the incubation net tray to one side of the rotating mechanism, and evenly distributing several paddles in a ring on the outer wall of the incubation net tray, and the buoyancy plate being ring-shaped on the outer wall of the incubation net tray and located above the paddles, provides buoyancy to the incubation net tray, causing the upper end of the incubation net tray to float on the water surface while the lower end of the incubation net tray remains below the water surface, allowing the fertilized eggs of the large-nosed gudgeon to incubate close to the shallow water surface area, and using the rotating mechanism to drive the incubation net tray to drift around its circumference on the water surface, allowing water to flow through the incubation net tray and exchange with the water in the incubation net tray, so that... The water in the hatching net is kept clean, increasing the dissolved oxygen level. The net also disturbs the fertilized eggs of the large-nosed goby, keeping them floating. During water exchange through the moving net, the water flow is relatively dispersed due to the net's barrier effect, minimizing impact on the eggs and reducing the risk of membrane rupture. Furthermore, the water flow impacting the paddles during drifting causes the net to rotate, altering the direction of water exchange on its sides. This ensures even water exchange, dispersing the eggs and preventing them from clustering together and causing oxygen depletion, thus improving the hatching rate. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the invention.

[0019] Figure 2 This is a schematic diagram of the connection structure between the incubator and the rotating mechanism.

[0020] Figure 3 This is a schematic diagram of the rotating mechanism.

[0021] Figure 4 A three-dimensional schematic diagram of an incubation tray with a strip-shaped, wavy curved surface structure.

[0022] Figure 5 This is a schematic diagram of the bottom of an incubation tray with a strip-shaped, wavy curved surface structure.

[0023] Figure 6 This is a schematic diagram of the cross-section of an incubation tray with a strip-shaped, wavy curved surface structure.

[0024] Figure 7 A three-dimensional schematic diagram of an incubation tray with a ring-shaped, wavy curved surface structure.

[0025] Figure 8 This is a schematic diagram of the bottom of the incubation tray, which has a ring-shaped, wavy curved surface structure.

[0026] Figure 9 This is a schematic diagram of the cross-section of an incubation tray with a ring-shaped wavy curved surface structure.

[0027] Figure 10 This is a top view of the structure of the invention installed in a circulating incubation tank.

[0028] Figure 11 This is a three-dimensional schematic diagram of the invention installed in a circulating incubation tank.

[0029] In the diagram: Incubator 10, Hatching Net Tray 11, Buoyancy Plate 12, Paddle Blade 13, Mounting Base 14, Rotating Mechanism 20, Column 21, Rotating Bushing 22, Drive Motor 23, Connecting Arm 24, Main Arm 241, Auxiliary Arm 242, Large Gear 25, Small Gear 26, Shaft Seat 27, Protective Cover 28, Spraying Device 30, Spray Head 31, Water Pump 32, Circulating Hatching Pool 40, Drainage Pipe 41, Inlet Pipe 42, Circulating Pump 43, Water Filtration Device 50, Oxygen Pump 60, Oxygen Pipe 61, Tubular Ultraviolet Sterilizer 70. Detailed Implementation

[0030] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Please refer to Figures 1 to 3This invention provides a simulated ecological incubation device for fertilized eggs of the big-nosed gudgeon. The device is erected on the water surface of an incubation pond and is used to incubate fertilized eggs of the big-nosed gudgeon. The simulated ecological incubation device for fertilized eggs of the big-nosed goby includes an incubator 10 that can float on the surface of the incubation pool and a rotating mechanism 20. The incubator 10 includes an incubation net tray 11 and a buoyancy plate 12 arranged in parallel for incubating the fertilized eggs of the big-nosed goby. The rotating mechanism 20 is fixedly inserted into the incubation pool. The incubation net tray 11 is rotatably connected to one side of the rotating mechanism 20. The incubation net tray 11 is a circular disc with an open top. The bottom and all four sides of the incubation net tray 11 are made of metal mesh. The inner bottom and all four sides of the incubation net tray 11 are covered with nylon mesh. Several paddles 13 are evenly distributed in a ring on the outer side of the incubation net tray 11. The paddles 13 are inclined along one side of the tangent direction of the incubation net tray 11. The buoyancy plate 12 is arranged in a ring on the outer side of the incubation net tray 11. The buoyancy plate 12, located above the paddle 13, can be an independent float or a buoyancy ball, evenly distributed in a ring around the outer wall of the hatching net tray 11. Alternatively, it can be a ring-shaped buoyancy ring fitted around the outer wall of the hatching net tray 11. The buoyancy plate 12 can float on the water surface, providing buoyancy to the hatching net tray 11, so that the upper end of the hatching net tray 11 floats on the water surface while the lower end remains below the water surface. Water from the hatching tank can enter the hatching net tray 11 through the metal mesh and nylon mesh. The floating hatching net tray 11 can control the fertilized eggs of the big-nosed goby to hatch in a shallow area near the water surface. The dissolved oxygen content in the shallow water is high, and shallow hatching is closer to the original ecological hatching state of the big-nosed goby fertilized eggs, which is beneficial to the hatching of the big-nosed goby fertilized eggs. The rotating mechanism 20 drives the hatching net tray 11 to rotate and drift around its circumference on the surface of the hatching pool. The impact force of this drift causes water from the hatching pool to flow through the metal mesh and nylon mesh into the hatching net tray 11, exchanging water with it and keeping the water in the net tray 11 clean. The flow of water generated by this exchange also disturbs the fertilized eggs of the large-nosed goby in the net tray 11, causing them to suspend in the water and remain floating. During the circular drifting process around the rotating mechanism 20 on the water surface, the water flow propels the paddle 13, and the hatching net 11 rotates under the force of the paddle 13. The rotation of the hatching net 11 changes the direction of the exchange between its four sides and the water flow, so that the four sides of the hatching net 11 are evenly exchanged with the water flow. This allows the fertilized eggs of the big-nosed goby to be dispersed in the hatching net 11, avoiding the phenomenon of the big-nosed goby fertilized eggs gathering together and causing hypoxia due to the influence of water flow and centrifugal force.

[0032] Specifically, the rotating mechanism 20 includes a column 21, a rotating sleeve 22, a drive motor 23, and a connecting arm 24. The column 21 is vertically fixed to the bottom of the water, with its upper end extending out of the water surface. The drive motor 23 is fixed to the top of the column 21. The rotating sleeve 22 is coaxially and rotatably fitted onto the column 21 and close to the drive motor 23. A large gear 25 is coaxially arranged on the outer wall of the rotating sleeve 22, and a small gear 26 that meshes with the large gear 25 is arranged on the output shaft of the drive motor 23. One end of the connecting arm 24 is pinned to the rotating sleeve 22, and its other end extends freely outward and close to the water surface, and can swing up and down along the rotating sleeve 22. A bearing seat 27 is vertically pinned to its extended end. The hatching net tray 11 is freely rotated towards the column 21. A mounting base 14 is set at the center of the upper or lower end of the hatching net tray 11. The hatching net tray 11 is mounted on the shaft seat 27 through the mounting base 14. The mounting base 14 and the shaft seat 27 rotate freely relative to each other. The drive motor 23 drives the rotating bushing 22 to rotate around the column 21, so that the connecting arm 24 drives the hatching net tray 11 to drift around the column 21 in a circle on the water surface. During the drifting process, the paddle blades 13 drive the hatching net tray 11 to rotate around the shaft seat 27 under the action of the water flow. The connecting arm 24 is movably connected to the rotating bushing 22 and the hatching net tray 11. During the rotation, the connecting arm 24 can adaptively swing up and down with the hatching net tray 11, and is not affected by changes in water level.

[0033] To prevent oil or foreign objects from falling from the drive motor 23, large gear 25, and small gear 26 during transmission, a protective cover 28 with an open top is fixedly fitted onto the rotating bushing 22. The protective cover 28 is installed below the large gear 25 and small gear 26 and surrounds the large gear 25 and small gear 26. It can be used to receive wear debris, oil, and other foreign objects generated by the drive motor 23, large gear 25, and small gear 26 during transmission, preventing debris, oil, and other foreign objects from entering the hatching tank and polluting the water.

[0034] Please continue reading. Figure 1 Furthermore, there are multiple sets of connecting arms 24, which are evenly distributed around the circumference of the rotating bushing 22, and there are multiple incubators 10, which are arranged corresponding to the connecting arms 24.

[0035] Please refer to Figures 4 to 9 Furthermore, the bottom of the hatching net tray 11 is a strip-shaped or ring-shaped wavy curved surface structure. The bottom of the wavy curved surface structure forms alternating depths in the water, increasing the friction and contact area with the water. This allows for effective exchange between the water in the hatching pool and the water in the hatching net tray 11, and also serves to separate, disperse, and buffer the fertilized eggs of the large-nosed gudgeon, preventing them from gathering together.

[0036] Please refer to Figure 2 , Figure 3 and Figure 5 In a preferred embodiment, the mounting base 14 is located at the center of the lower end of the incubation net tray 11. The connecting arm 24 includes a main arm 241 and a secondary arm 242. One end of the main arm 241 is pinned to the rotating bushing 22 and can rotate freely up and down. One end of the secondary arm 242 is pinned to the other end of the main arm 241 away from the rotating bushing 22, and its other end extends freely outward along the main arm 241 and can rotate freely up and down. The bearing seat 27 is pinned to the end of the secondary arm 242 away from the main arm 241 and can extend towards... The column 21 can rotate freely in the direction of the main arm 241 and the auxiliary arm 242 extend into the water. The hatching net tray 11 is mounted on the bearing seat 27 through the mounting base 14. The mounting base 14 and the bearing seat 27 can rotate freely relative to each other. The drive motor 23 drives the rotating bushing 22 to rotate around the column 21. The rotating bushing 22 drives the hatching net tray 11 to drift around the column 21 in a circle on the water surface through the main arm 241 and the auxiliary arm 242. During the drifting process, the main arm 241 and the auxiliary arm 242 can adaptively swing up and down according to the change of water level.

[0037] Please refer to Figure 10 or Figure 11 Furthermore, the simulated ecological incubation device for giant snout fertilized eggs also includes a spray device 30. The spray device 30 includes a spray head 31 and a water pump 32. The spray head 31 is positioned above the water surface and faces one of the incubators 10. The input end of the water pump 32 is connected to the water source in the incubation tank, and the output end of the water pump 32 is connected to the spray head 31. The water pump 32 delivers water from the incubation tank to the spray head 31. When the rotating mechanism 20 drives each incubator 10 to drift past below the spray head 31, the spray head 31 sprays water onto each incubator 10. This spraying increases the contact area between the water and air, oxygenating the water surface and increasing the dissolved oxygen content, which is beneficial for the hatching of giant snout fertilized eggs. During the spraying process, the water droplets also disturb the water surface in the incubator 10, causing the fertilized eggs to float in the water.

[0038] Please continue reading. Figure 10 or Figure 11 Furthermore, in a preferred embodiment, the simulated ecological incubation device for fertilized eggs of the big-nosed gudgeon also includes a circulating incubation pool 40, incubator 10 and rotating mechanism 20 are disposed in the circulating incubation pool 40, spray head 31 is mounted above the water surface in the circulating incubation pool 40, and the input end of water pump 32 is connected to the circulating incubation pool 40 to transport water from the circulating incubation pool 40 to the spray head 31 for circulating spraying.

[0039] The circulating incubation tank 40 is preferably circular. A water filtration device 50 is installed on the outside of the circulating incubation tank 40. A drain pipe 41 is installed at the bottom of the circulating incubation tank 40, and a water inlet pipe 42 is installed on the upper edge of the circulating incubation tank 40. The water filtration device 50 is a microfilter or a biological filter. The inlet of the water filtration device 50 is connected to the drain pipe 41, and the outlet of the water filtration device 50 is connected to the inlet pipe 42. A circulation pump 43 is installed at the outlet of the water filtration device 50, and the drain pipe 41 circulates the water. Water in the incubation pool 40 is discharged into the water filtration device 50 for filtration. The filtered clean water is then transported to the inlet pipe 42 by the circulation pump 43. The outlet of the inlet pipe 42 is tilted towards the water surface in the circulating incubation pool 40 to spray water. The impact force of the water causes the water in the circulating incubation pool 40 to flow in a circular motion, and the direction of the water flow is opposite to the drift direction of the incubator 10. This causes the water in the circulating incubation pool 40 to form a convection with the incubator 10, which can increase the impact force of the water and enable the water in the circulating incubation pool 40 to exchange effectively with the water in the incubator 10.

[0040] In practical implementation, the drain pipe 41 can be placed at the bottom center of the circulating incubation tank 40, and the column 21 of the rotating mechanism 20 can be placed at the top of the drain pipe 41. A tubular ultraviolet sterilizer 70 is installed at the outlet of the water filtration device 50. The input end of the water pump 32 and the input end of the inlet pipe 42 of the spray device 30 are connected to the outlet of the tubular ultraviolet sterilizer 70. Water purified by the water filtration device 50 enters the tubular ultraviolet sterilizer 70 for sterilization, and then re-enters the circulating incubation tank 40 through the spray head 31 and the inlet pipe 42. The tubular ultraviolet sterilizer 70 irradiates the water flow, thereby killing bacteria, viruses, and other microorganisms in the water, improving the water quality in the circulating incubation tank 40. Furthermore, the sterilized water is pumped by the water pump 32 to the spray head 31 and sprayed onto the incubation mesh tray 11, effectively inhibiting bacterial growth on the surface of the incubation mesh tray 11.

[0041] Please continue reading. Figure 10 or Figure 11 In order to increase the dissolved oxygen content in the circulating hatching tank 40, an oxygenation pump 60 is installed on the outside of the circulating hatching tank 40, and an oxygen pipe 61 is installed in the bottom annular disc inside the circulating hatching tank 40. The oxygen output end of the oxygenation pump 60 is connected to the oxygen pipe 61 to oxygenate the water in the circulating hatching tank 40.

[0042] In practical use, the simulated ecological incubation device for large-snout gudgeon fertilized eggs provides buoyancy to the incubation net tray 11 via the buoyancy plate 12, causing the upper part of the incubation net tray 11 to float on the water surface of the circulating incubation tank 40. This allows the large-snout gudgeon fertilized eggs to incubate close to the water surface. A rotating mechanism 20 drives the incubation net tray 11 to drift around its circumference on the water surface. The drift speed of the incubation net tray 11 can be adaptively set according to the incubation cycle of the large-snout gudgeon fertilized eggs, preferably set at 0.5 m / s-0.7 m / s. During the drifting process, water flows through the incubation net tray 11, exchanging water with the water in the incubation net tray 11, keeping the water in the incubation net tray 11 clean and improving water quality. The dissolved oxygen level is adjusted, and the fertilized eggs of the bigmouth gudgeon in the hatching net tray 11 are disturbed to keep them floating, simulating the environment of an ecological water area. During the water exchange process by moving the hatching net tray 11, the water flow is relatively dispersed under the effect of the hatching net tray 11, and the impact force on the fertilized eggs of the bigmouth gudgeon is small, which can reduce the occurrence of egg membrane rupture. In addition, during the drifting process, the water flow impacts the paddle 13, which can make the hatching net tray 11 rotate, which can change the exchange direction between the hatching net tray 11 and the water flow on all four sides of the hatching net tray 11. This allows the water flow to be evenly exchanged on all four sides of the hatching net tray 11, which can disperse the fertilized eggs of the bigmouth gudgeon in the hatching net tray 11, avoid the bigmouth gudgeon fertilized eggs gathering together and causing hypoxia, and improve the hatching rate.

[0043] The above description discloses only preferred embodiments of the present invention and should not be construed as limiting the scope of the invention. Those skilled in the art will understand that implementing all or part of the above embodiments and making equivalent changes in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. A simulated ecological incubation device for fertilized eggs of the large-nosed gudgeon, characterized in that: The device includes an incubator floating on the water surface and a rotating mechanism. The incubator comprises a hatching net tray and a buoyancy plate arranged in parallel for hatching fertilized eggs of the large-nosed goby. The hatching net tray is rotatably connected to one side of the rotating mechanism. Several paddles are evenly distributed in a ring on the outer wall of the hatching net tray. The buoyancy plate is arranged in a ring on the outer wall of the hatching net tray and above the paddles. The buoyancy plate provides buoyancy to the hatching net tray, causing the upper end of the hatching net tray to float on the water surface while the lower end remains submerged. The rotating mechanism drives the hatching net tray to drift around its circumference on the water surface, allowing water to flow through the hatching net tray, exchanging water with the water in the hatching net tray, and disturbing the fertilized eggs of the large-nosed goby in the hatching net tray to keep them floating. During the drifting process, the water flow impacts the paddles, enabling the hatching net tray to rotate.

2. The simulated ecological incubation device for fertilized eggs of the big-nosed gudgeon as described in claim 1, characterized in that: The inner bottom of the incubation tray has a wavy curved surface structure.

3. The simulated ecological incubation device for fertilized eggs of the big-nosed gudgeon as described in claim 2, characterized in that: The rotating mechanism includes a column, a rotating bushing, a drive motor, and a connecting arm. The column is vertically fixed in the water, the drive motor is fixed to the top of the column, the rotating bushing is rotatably mounted on the column and close to the drive motor, a large gear is coaxially arranged on the outer wall of the rotating bushing, and a small gear that meshes with the large gear is arranged on the output shaft of the drive motor. One end of the connecting arm is connected to the rotating bushing, and the other end extends freely outward. A bearing seat is arranged at the extended end, and the hatching net is rotatably mounted on the bearing seat. The drive motor drives the rotating bushing to rotate, and the connecting arm drives the hatching net to drift around the column on the water surface.

4. The simulated ecological incubation device for fertilized eggs of the big-nosed gudgeon as described in claim 3, characterized in that: The connecting arm includes a main arm and a secondary arm. One end of the main arm is pinned to a rotating bushing and can rotate freely up and down. One end of the secondary arm is pinned to the other end of the main arm away from the rotating bushing, and the other end extends freely outward along the main arm and can rotate freely up and down. The bearing seat is pinned to the end of the secondary arm away from the main arm. The rotating bushing drives the hatching net tray to drift around the column on the water surface through the main arm and the secondary arm. During the drifting process, the main arm and the secondary arm can adaptively swing up and down according to the change of water level.

5. The simulated ecological incubation device for fertilized eggs of the big-nosed gudgeon as described in claim 4, characterized in that: The connecting arms are in multiple sets and are evenly distributed around the circumference of the rotating shaft sleeve. There are multiple incubators, which are arranged corresponding to the connecting arms.

6. The simulated ecological incubation device for fertilized eggs of the big-nosed gudgeon as described in claim 5, characterized in that: It also includes a spraying device, which includes a spray head and a water pump. The spray head is mounted above the water surface and located on one side of the rotating mechanism. The input end of the water pump is connected to a water source, and the output end of the water pump is connected to the spray head. During the process of the rotating mechanism driving each incubator to drift in a circle, each incubator passes under the spray head in sequence, and the spray head sprays each incubator in a cyclical manner.

7. The simulated ecological incubation device for fertilized eggs of the big-nosed gudgeon as described in claim 6, characterized in that: It also includes a circulating incubation tank, incubator and rotating mechanism are set in the circulating incubation tank, spray head is set above the water surface in the circulating incubation tank, and the input end of water pump is connected to the circulating incubation tank to transport water in the circulating incubation tank to the spray head for circulating spraying.

8. The simulated ecological incubation device for fertilized eggs of the big-nosed gudgeon as described in claim 7, characterized in that: The circulating incubation pool is circular. A water filtration device is installed on the outside of the pool, and a drain pipe is installed at the bottom of the pool. An inlet pipe is installed on the upper edge of the pool. The inlet of the water filtration device is connected to the drain pipe, and the outlet is connected to the inlet pipe. A circulation pump is installed at the outlet of the water filtration device. The drain pipe discharges water from the pool into the filtration device for filtration. The filtered water is then pumped to the inlet pipe by the circulation pump. The outlet of the inlet pipe is tilted towards the water surface in the pool, spraying water. The impact force of the water causes the water in the pool to flow in a circular motion, and the direction of the water flow is opposite to the drift direction of the incubator.

9. The simulated ecological incubation device for fertilized eggs of the big-nosed gudgeon as described in claim 3, characterized in that: A protective cover with an opening at the top is fixedly fitted onto the rotating bushing. The protective cover is installed below the large gear and the small gear, and surrounds the large gear and the small gear.

10. The simulated ecological incubation device for fertilized eggs of the big-nosed gudgeon as described in claim 7, characterized in that: An oxygenation pump is also installed on the outside of the circulating incubation tank. An oxygen pipe is installed in the annular disc at the bottom of the circulating incubation tank. The oxygen output end of the oxygenation pump is connected to the oxygen pipe to oxygenate the circulating incubation tank.

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