An auxiliary egg collection system for Gymnocypris przewalskii

Abstract

The present invention discloses an auxiliary egg collection system for Gymnocypris przewalskii. By taking advantage of the characteristic that Gymnocypris przewalskii swims upstream during the breeding period for spawning and reproduction, the system designs an upstream fishway that allows the fish school to migrate naturally, and sets up a fish collection pond and an artificial egg collection workbench indoors, realizing the artificial egg collection operation for Gymnocypris przewalskii indoors, avoiding the influence of the outdoor environment on the egg collection work, getting rid of the limitation of time for artificial egg collection, and continuously improving its fertilization rate. At the same time, the system designs a fish rejection channel, realizing the artificial egg collection in a continuous flow operation and reducing the injury of broodstock.

Description

Technical Field

[0001] The present invention relates to the technical field of assisted egg collection, and particularly to an assisted egg collection system for Gymnocypris przewalskii Background Art

[0002] Gymnocypris przewalskii belongs to the genus Gymnocypris in the schizothoracinae subfamily of Cyprinidae, also known as "Huangyu"; it was included in the second-level list of priority protected species of fish in the "China Biodiversity Conservation Action Plan" in 1994, and was listed as an endangered species in the "China Species Red List" of the Biodiversity Working Group of the China Council for International Cooperation on Environment and Development in 2004; Gymnocypris przewalskii is a reproductive migratory fish, and the period from May to August every year is the peak spawning period. During this stage, artificial assistance measures are taken to artificially collect eggs and fertilize them in natural river channels to improve the fertilization rate. Then, professional hatching equipment is used for artificial hatching to improve the hatching rate. After the hatched fry are artificially cultured for one year, the body length can reach 8-10 cm, and they are released into the original river channel in the following year to achieve the purpose of resource proliferation. The traditional artificial egg collection method is to catch and collect eggs by manually pulling a net into the river in the wild. This method will scare the fish school, and at the same time, the operators are affected by the water volume, water flow speed, water depth and weather of the river channel, resulting in low egg collection efficiency. Summary of the Invention

[0003] Aiming at the problems in the prior art, the present invention provides an assisted egg collection system for Gymnocypris przewalskii. The system utilizes the characteristic that Gymnocypris przewalskii swims upstream against the river current during the breeding period for fertilization and egg laying, designs a fishway that allows the fish school to swim back naturally, and sets up a fish collection pond and a workbench indoors to realize the assisted egg collection work for Gymnocypris przewalskii, solving the problem that the traditional fishing and egg collection method scares the fish school and at the same time avoiding the influence of the water volume, water flow speed, water depth and external weather of the river channel on the operators.

[0004] To achieve the purpose of the present invention, the present invention adopts the following technical solutions:

[0005] An auxiliary egg collection system for Gymnocypris przewalskii in Qinghai Lake, comprising: a workbench, a fish collection pond, a water storage pond, a deep well, a submersible pump, a PE water supply pipe, a sluice, a PE water diversion pipe, an upper fishway, and a filter pipe; the filter pipe is horizontally arranged, and a plurality of water inlet holes are opened on its pipe wall; one end of the filter pipe is communicated with the deep well; a submersible pump is placed in the deep well, and the submersible pump is connected with the water storage pond through the PE water supply pipe; the water storage pond is communicated with the fish collection pond through the PE water diversion pipe; a sluice is arranged on the PE water diversion pipe; the workbench is located on one side of the fish collection pond; the upper fishway is connected with the fish collection pond; the workbench comprises a tabletop, a chute, a temporary holding pond, and a fish discharge channel; there are a plurality of temporary holding ponds, which are respectively arranged on both sides of the tabletop; a chute is arranged on one side of each temporary holding pond; the fish discharge channel is inclined, and one end of the fish discharge channel is located below the tabletop; the lower ends of all the chutes are connected with the fish discharge channel; an opening for discharging fish is opened at one end of the tabletop, and the opening for discharging fish is located above the fish discharge channel.

[0006] Preferably, an upwardly convex edge is provided around the tabletop, and the height of the edge is 15 cm; the tabletop is inclined at the position of the fish discharge opening.

[0007] Preferably, one end of the tabletop is wide and the other end is narrow, the width of one end is 3 m, and the width of the other end is 1.2 m; an opening is provided on the edge of the tabletop on the side close to the fish collection pond.

[0008] Preferably, a bracket is provided at the bottom of the workbench, and the height of the bracket is 65 cm; the tabletop, the chute, the temporary holding pond, and the fish discharge channel are supported and fixed through the bracket; the top end of the fish collection pond is flush with the tabletop of the workbench.

[0009] Preferably, a water inlet pipe is provided at the upper part of one side of the temporary holding pond, and a water outlet pipe is provided at the bottom; a water drainer is installed at the position where the water outlet pipe is provided at the bottom of the temporary holding pond.

[0010] Preferably, the water storage pond comprises a first water storage pond, a second water storage pond, a third water storage pond, and a fourth water storage pond; the first water storage pond is communicated with the fish collection pond through the PE water diversion pipe; the submersible pump is connected with the first water storage pond through the PE water supply pipe; a communication pipe is provided between the first water storage pond and the third water storage pond, an overflow pipe and a drain valve are provided between the first water storage pond and the fourth water storage pond, and the overflow pipe is 20 cm away from the top of the first water storage pond; a communication pipe is provided between the second water storage pond and the fourth water storage pond; a communication pipe is provided between the first water storage pond and the third water storage pond.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The setting of this system breaks the traditional technology and time limit of artificial egg collection in natural river channels for many years. Artificial egg collection in natural river channels can generally only be carried out from 8:30 to 22:00 every day. In case of bad weather such as strong wind and rain, artificial egg collection work cannot be carried out. However, according to relevant test results, the natural spawning peak of Gymnocypris przewalskii can last until 3-4 am. How to make good use of the spawning peak of Gymnocypris przewalskii determines the success or failure of the artificial proliferation and release work. This system can make full use of the spawning peak of Gymnocypris przewalskii to carry out operations.

[0013] This system first purifies the river water, diverts it into a deep well, and then uses a water pump to pump the water into a reservoir, raising the temperature by 1-2 °C. Then, the water in the reservoir is regulated by a sluice gate and flows into a fish collection pond, and then through the fish collection pond and flows through the fishway into the river. Through the action of the water in the fishway, some parent fish of Gymnocypris przewalskii in the river are introduced into the fish collection pond to carry out artificial egg collection work. It realizes indoor assisted egg collection operation for Gymnocypris przewalskii, avoiding the influence of outdoor environmental factors on the quality of fertilized eggs and egg collection work. For example, ultraviolet rays, wind, rain, floods and other situations have a great impact on the fertilization rate. If the operation is a little careless, it will lead to a low fertilization rate and affect the artificial hatching efficiency. This design breaks the time limit of artificial egg collection; realizes a continuous operation mode of artificial egg collection that can be carried out for 24 hours, not only improving the egg collection efficiency, but also expanding the scale of artificial egg collection.

[0014] In addition, the design of the fish rejection channel enables the parent fish after egg collection and the immature parent fish to return to the river in time, effectively avoiding the death of parent fish. Brief Description of the Drawings

[0015] Figure 1 It is a schematic structural diagram of an auxiliary egg collection system for Gymnocypris przewalskii of the present invention;

[0016] Figure 2 It is a schematic structural diagram of the workbench of an auxiliary egg collection system for Gymnocypris przewalskii of the present invention;

[0017] In the figure: tabletop 1, chute 2, temporary rearing pond 3, fish rejection channel 4, fish collection pond 5, reservoir 6, deep well 7, submersible pump 8, PE water supply pipe 9, sluice gate 10, PE water diversion pipe 11, fishway 12, filter water pipe 13, river channel 14, fish rejection opening 15, support 16, water inlet pipe 31, water outlet pipe 32, reservoir one 61, reservoir two 62, reservoir three 63, reservoir four 64, overflow pipe 65, connecting pipe 66, drain valve 67. Detailed Embodiments

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention:

[0019] Such as Figure 1 、 2As shown in the figure, in an embodiment of the present invention, an auxiliary egg collection system for Gymnocypris przewalskii includes: a workbench, a fish collection pond 5, a water storage pond 6, a deep well 7, a submersible pump 8, a PE water supply pipe 9, a sluice 10, a PE water diversion pipe 11, an upstream fishway 12, and a filter pipe 13; the filter pipe 13 is horizontally arranged, and a plurality of water inlet holes are opened on its pipe wall; one end of the filter pipe 13 is communicated with the deep well 7; a submersible pump 8 is placed in the deep well 7, and the submersible pump 8 is connected to the water storage pond 6 through the PE water supply pipe 9; the water storage pond 6 is communicated with the fish collection pond 5 through the PE water diversion pipe 11; a sluice 10 is arranged on the PE water diversion pipe 11; the workbench is located on one side of the fish collection pond 5; the upstream fishway 12 is connected to the fish collection pond 5; the workbench includes a tabletop 1, a chute 2, a temporary holding pond 3, and a fish disposal channel 4; there are a plurality of temporary holding ponds 3, which are respectively arranged on both sides of the tabletop 1; a chute 2 is arranged on one side of each temporary holding pond 3; the fish disposal channel 4 is inclined, and one end of the fish disposal channel 4 is located below the tabletop 1; the lower ends of all the chutes 2 are connected to the fish disposal channel 4; an opening for disposing of fish 15 is opened at one end of the tabletop 1, and the opening for disposing of fish 15 is located above the fish disposal channel 4.

[0020] During specific implementation, the filter pipe 13 is buried two meters below the riverbed, and the lower ends of the upstream fishway 12 and the fish disposal channel 4 are connected to the river channel 14; the water in the river channel 14 is diverted into the deep well 7, the water in the deep well 7 is put into the water storage pond 6 through the submersible pump 8, the water in the water storage pond 6 is put into the fish collection pond 5, and the water in the fish collection pond 5 flows into the river channel 14 along the upstream fishway 12; the fish in the river channel 14 swim back and enter the fish collection pond 5 through the upstream fishway 12, the staff catches the fish onto the tabletop 1, puts the fish to be egg-collected into the temporary holding pond 3, and the fish that do not need to be egg-collected reach the fish disposal channel 4 from the opening for disposing of fish 15; after the fish in the temporary holding pond 3 finish laying eggs, the fish are put into the fish disposal channel 4 from the chute 2, and the fish in the fish disposal channel 4 enter the river channel 14 again along the fish disposal channel 4.

[0021] Specifically, an upwardly convex edge is provided around the tabletop 1, and the height of the edge is 15 cm, which is convenient for operation while ensuring that the fish do not fall; the tabletop 1 is inclined at the position of the opening for disposing of fish 15 to facilitate the fish to fall into the fish disposal channel 4.

[0022] Specifically, one end of the tabletop 1 is wide and the other end is narrow, with the width of one end being 3 m and the width of the other end being 1.2 m; an opening is provided on the edge of the tabletop 1 on the side close to the fish collection pond 5 to facilitate the fish inside the fish collection pond 5 to reach the tabletop 1.

[0023] Specifically, a bracket 16 with a height of 65 cm is provided at the bottom of the workbench; it is convenient for manual operation; the tabletop 1, the chute 2, the temporary holding pond 3, and the fish disposal channel 4 are supported and fixed through the bracket 16; the top end of the fish collection pond 5 is flush with the tabletop 1 of the workbench.

[0024] Specifically, a water inlet pipe 31 is arranged at the upper part of one side of the temporary rearing pond 3, and a water outlet pipe 32 is arranged at the bottom; a water drainer is installed at the position where the water outlet pipe 32 is arranged at the bottom of the temporary rearing pond 3. Water can be added to the temporary rearing pond 3 through the water inlet pipe 31, and the water outlet pipe 32 can discharge water by opening the water drainer, so as to realize the replacement of the water in the temporary rearing pond 3.

[0025] Specifically, the reservoir 6 includes a first reservoir 61, a second reservoir 62, a third reservoir 63, and a fourth reservoir 64; the first reservoir 61 is communicated with the fish collecting pond 5 through a PE water diversion pipe 11; the submersible pump 8 is connected with the first reservoir 61 through a PE water supply pipe 9; a communication pipe 65 is arranged between the first reservoir 61 and the third reservoir 63, an overflow pipe 65 and a drain valve 67 are arranged between the first reservoir 61 and the fourth reservoir 64, and the overflow pipe 65 is 20 cm away from the top of the first reservoir 61; a communication pipe 66 is arranged between the second reservoir 62 and the fourth reservoir 64; a communication pipe 66 is arranged between the first reservoir 61 and the third reservoir 63; the first reservoir 61 and the third reservoir 63 are specially used for supplying water to the fish collecting pond 5 and the fish inlet channel 12, and the second reservoir 62 and the fourth reservoir 64 are used for fry hatching and cultivation in the workshop; the water in the first reservoir 61 enters the fourth reservoir 64 through the overflow pipe 65, and the water in the fourth reservoir 64 flows back to the first reservoir 61 through the drain valve 67 to realize the water replacement operation.

[0026] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and its improved concept of the present invention, makes equivalent substitutions or changes, and all should be covered by the protection scope of the present invention.

Claims

1. An auxiliary egg collection system for Gymnocypris przewalskii Comprising: A workbench, a fish collection pond, a water storage pond, a deep well, a submersible pump, a PE water supply pipe, a sluice, a PE water diversion pipe, an upstream fishway, and a filter pipe; characterized in that: the filter pipe is horizontally arranged, and a plurality of water inlet holes are opened on its pipe wall; one end of the filter pipe is communicated with the deep well; a submersible pump is placed in the deep well, and the submersible pump is connected to the water storage pond through a PE water supply pipe; the water storage pond is communicated with the fish collection pond through a PE water diversion pipe; a sluice is arranged on the PE water diversion pipe; the workbench is located on one side of the fish collection pond; the upstream fishway is connected to the fish collection pond; the workbench includes a tabletop, a chute, a temporary holding pond, and a fish discharge channel; there are a plurality of temporary holding ponds, which are respectively arranged on both sides of the tabletop; a chute is arranged on one side of each temporary holding pond; the fish discharge channel is obliquely arranged, and one end of the fish discharge channel is located below the tabletop; the lower ends of all chutes are connected to the fish discharge channel; an opening for discharging fish is opened at one end of the tabletop, and the opening for discharging fish is located above the fish discharge channel; the water storage pond includes a first water storage pond, a second water storage pond, a third water storage pond, and a fourth water storage pond; the first water storage pond is communicated with the fish collection pond through a PE water diversion pipe; the submersible pump is connected to the first water storage pond through a PE water supply pipe; a communication pipe is arranged between the first water storage pond and the third water storage pond, an overflow pipe and a drain valve are arranged between the first water storage pond and the fourth water storage pond, and the overflow pipe is 20 cm away from the top of the first water storage pond; a communication pipe is arranged between the second water storage pond and the fourth water storage pond; a communication pipe is arranged between the first water storage pond and the third water storage pond; a water inlet pipe is arranged at the upper part of one side of the temporary holding pond, and a water outlet pipe is arranged at the bottom; a water drainer is installed at the position where the water outlet pipe is arranged at the bottom of the temporary holding pond.

2. An auxiliary egg collection system for Gymnocypris przewalskii according to claim 1 Characterized in that: An upwardly convex edge is provided around the tabletop, and the edge is 15 cm high; the tabletop is obliquely arranged at the position of the fish discharge opening.

3. An auxiliary egg collection system for Gymnocypris przewalskii according to claim 2 Characterized in that: One end of the tabletop is wide and the other end is narrow, with one end having a width of 3 m and the other end having a width of 1.2 m; an opening is provided at the edge of the tabletop on the side close to the fish collection pond.

4. An auxiliary egg collection system for Gymnocypris przewalskii according to claim 2 Characterized in that: A bracket is arranged at the bottom of the workbench, with a height of 65 cm; the tabletop, the chute, the temporary holding pond, and the fish discharge channel are supported and fixed through the bracket; the top end of the fish collection pond is flush with the tabletop of the workbench.

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