Classified fishing device and method for aquaculture pond fishery

Abstract

The invention provides an aquaculture pond fishery grading fishing device and method, belongs to the technical field of aquaculture, and aims to solve the problem that a large number of immature small fishes are caught due to a non-selective fishing mode in the prior art. The invention provides an aquaculture pond fishery grading fishing device and method. The aquaculture pond fishery grading fishing device comprises a base body, a first-stage net fence and a second-stage net fence. The base body faces the center of the pond and is provided with a concave surface, two side surfaces of the base body are communicated with the concave surface, and other surfaces are closed; one part of the first-stage net barrier is embedded with the inner concave surface, and the other part protrudes towards the central water body of the pond; the starting end and the tail end of the secondary net fence are connected with the front surface of the base body; at the beginning, meshes of the second-level mesh fence are larger than meshes of the first-level mesh fence, and the sizes of the meshes of the second-level mesh fence can be adjusted. And a sounder is arranged in the central area of the first-stage net fence. The device is matched with the method, the problem that fishery resources are damaged due to non-selective fishing in a traditional fishing mode is effectively solved, a graded and efficient fishing scheme is provided, and the sustainability of fishing is promoted.

Description

Technical Field

[0001] The invention belongs to the technical field of aquaculture, and in particular relates to a fishery classification and catching device and method for aquaculture ponds. Background Art

[0002] In the pond fishery breeding cycle, the release of seedlings and the capture of adult fish are carried out alternately. Fish of different growth stages, such as fry, immature small fish and mature large fish, often coexist in the pond. Traditional fishing methods mainly rely on fishing nets. In order to ensure fishing efficiency, the mesh size of the fishing net cannot be too large, resulting in a mixture of fish sizes in the fishing results.

[0003] This non-selective fishing method not only affects the rational utilization of fishery resources, but may also lead to the capture of a large number of immature fish, posing a threat to the sustainability and economy of aquaculture. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a fishery classification fishing device and method for aquaculture ponds, which is used to solve the problem that the non-selective fishing method in the prior art leads to the capture of a large number of immature small fish.

[0005] To achieve the above-mentioned and other related purposes, the present invention provides a fishery graded fishing device and method for aquaculture ponds.

[0006] Among them, the fishery classification fishing device for aquaculture ponds is set at the junction of the water and the bank of the aquaculture pond, including: Base, primary fence and secondary fence; The back of the base body is close to the bank of the breeding pond, the front of the base body faces the center of the pond and is provided with an inner concave surface, the base body is a cavity structure, the two side surfaces of the base body and the inner concave surface are connected, and the other surfaces are closed; A portion of the first-level fence is engaged with the inner concave surface, and another portion protrudes toward the central water body of the pond; The starting and ending ends of the secondary fence are connected to the front of the base, and the main body of the secondary fence also protrudes toward the central water body of the pond; The secondary fence is located outside the primary fence, the mesh size of the secondary fence is larger than the mesh size of the primary fence, and the mesh size of the secondary fence is adjustable; A sound generator is arranged in the central area of ​​the first-level fence.

[0007] Optionally, the inner concave surface is semicircular; The first-level fence is circular; The secondary fence is semicircular; The centers of the inner concave surface, the primary mesh fence and the secondary mesh fence coincide with each other.

[0008] Optionally, the primary fence and the secondary fence are both supported by a plurality of columns, the columns are cylindrical, and notches are vertically arranged on the cylinders, and the primary fence and the secondary net are confined in the notches at multiple locations; The secondary fence can rotate around the center of the fence itself and rise and fall along the axis of the column in a plurality of column support structures.

[0009] Optionally, the secondary net fence includes a secondary rotating net and a secondary lifting net; At the connection between the starting end and the end of the secondary rotating net and the front of the base, a groove is provided on the base, and when the secondary rotating net rotates, the starting end or the end can enter the groove; The secondary lifting net can be lifted along the pillar; The main body sections of the secondary rotating net and the secondary lifting net are both limited by the notches of the columns; Initially, the meshes of the secondary rotating net and the secondary lifting net overlap. When the secondary rotating net rotates at an angle, the meshes of the secondary rotating net and the secondary lifting net are staggered to achieve mesh size adjustment.

[0010] Optionally, the secondary lifting net is located inside the secondary rotating net, and an annular groove is fixedly provided at the bottom of the secondary lifting net, between the secondary lifting net and the primary net fence; The depth of the annular groove gradually deepens along the circumference from the arc apex to the arc start and end of the secondary lifting net.

[0011] Optionally, a third-level net fence is further included, the shape and setting method of the third-level net fence are the same as those of the second-level net fence, but the arc radius and mesh size of the third-level net fence are larger than those of the second-level net fence, and the third-level net fence is located outside the second-level net fence.

[0012] Optionally, a first fish outlet trough is provided in the area between the first-level net pen and the second-level net pen on the top of the base body; a second fish outlet trough is provided in the area between the second-level net pen and the third-level net pen; After the secondary net fence is raised, the outlet of the annular groove is aligned with the first fish outlet groove; after the tertiary net fence is raised, the outlet of the annular groove is aligned with the second fish outlet groove; The first fish outlet trough and the second fish outlet trough both have slope surfaces.

[0013] The aquaculture pond fishery classification fishing method adopts the aquaculture pond fishery classification fishing device as described above, comprising: Conduct luring and driving away conditioned reflex training on fish in the pond; Triggering an alluring conditioned reflex in the primary net pen to attract the fish school to the aquaculture pond fishery grading fishing device, and the fish school sequentially passes through the third-level net pen, the second-level net pen and the first-level net pen according to its own size; The rotating nets of the third-level and second-level net fences rotate and are displaced with the meshes of the lifting net to reduce the mesh size; A repelling conditioned reflex is triggered in the primary net pen to drive the fish school away from the aquaculture pond fishery grading fishing device, and the fish school is trapped between the secondary net pen and the primary net pen, and between the third net pen and the secondary net pen according to its own size; Lifting the lifting nets of the third-level net fence and the second-level net fence respectively, so that the heights of the annular grooves of the lifting nets of the third-level net fence and the second-level net fence are aligned with the first fish outlet trough and the second fish outlet trough respectively; After all the fish in the first and second fish outlet troughs are emptied, the initial states of the third and second level net pens are restored.

[0014] Optionally, the induced conditioned reflex training is to place feed in the primary net pen area and / or play a sound of the first frequency through the sound generator; triggering the induced conditioned reflex is to place feed in the primary net pen area and / or play a sound of the first frequency; The expulsion conditioned reflex training is that the feed in the primary pen area is consumed and / or the sound of the second frequency is played by the sound generator; The expulsion conditioned reflex training is triggered when the feed in the primary pen area is consumed and / or a sound of the second frequency is played.

[0015] Optionally, the first frequency and the second frequency are determined by playing the recorded sound of a specific aquatic organism in water, the sound frequency that has a clustering inducing effect on the school of fish is the first frequency, and the sound frequency that has a repelling effect on the school of fish is the second frequency; The sounds of the specific aquatic organisms include the sounds of the same species of fish feeding, courting, and clustering, and the sounds of other species of fish preying and declaring territory.

[0016] As described above, the aquaculture pond fishery classification fishing device and method of the present invention have at least the following beneficial effects: The setting of primary and secondary nets effectively solves the problem of waste of resources and destruction of fish pond structure caused by non-selective fishing in traditional fishing methods. The primary net intercepts small fish to ensure the ecological balance of the fishery and prevent small fish from being caught; the secondary net catches large fish to ensure the economic benefits of the fishery. At the same time, the sounder set in the center of the primary net can attract fish and improve the efficiency and accuracy of fishing. This graded fishing device provides a graded and efficient fishing solution. This device combined with this method not only improves the efficiency of fishing fishery resources, but also promotes the sustainability of fishery fishing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Shown is an overall schematic diagram of the present invention.

[0018] Figure 2 Shown is a schematic top view of the present invention.

[0019] Figure 3 Shown as the present invention Figure 2 A partial enlarged schematic diagram in the middle.

[0020] Figure 4 Shown is a schematic diagram of the multi-stage net fence of the present invention.

[0021] Figure 5 Shown is a schematic diagram of the secondary net fence of the present invention.

[0022] Figure 6 Shown as the present invention Figure 5 A partial enlarged schematic diagram of point B in the middle.

[0023] Figure 7 Shown is a schematic diagram of the substrate of the present invention.

[0024] Figure 8 Shown is a schematic diagram of the lifting net of the three-level fence of the present invention in a lifting state.

[0025] Among them: base 1, first fish outlet trough 10, second fish outlet trough 11, net plate 13, first-level net fence 2, second-level net fence 3, second-level rotating net 30, second-level lifting net 31, annular groove 311, column 4, notch 41, third-level net fence 5, sounder 6, shore base 7. DETAILED DESCRIPTION

[0026] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0027] See also Figures 1 to 8 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0028] The following embodiments are only for illustration purposes and can be combined with each other, and are not limited to the contents presented in the following single embodiments.

[0029] For this example, please refer to Figure 1-Figure 8 The embodiment of the aquaculture pond fishery classification fishing device provided by the present invention is arranged at the junction of the water bank of the aquaculture pond, and multiple devices can be arranged according to the scale of the aquaculture pond, including: Base 1, primary net fence 2 and secondary net fence 3; The back of the base 1 is close to the bank 7 of the breeding pond, the front of the base 1 (the front end face of the base 1) faces the center of the pond and the front side is provided with an inner concave surface. The base 1 is a cavity structure and can be cast with concrete and assembled with a blocking panel. The two side faces of the base 1 and the inner concave surface are connected, and the other faces are closed. A part of the first-level fence 2 is embedded in the inner concave surface, and the other part protrudes toward the central water body of the pond. Since the inner concave surface is through and the base body 1 is a cavity structure, the first-level fence 2 is equivalent to being directly connected to the pond water body through the two side surfaces of the base body 1; The beginning and the end of the secondary fence 3 are connected to the front of the base 1 to divide the water body. The main body of the secondary fence 3 also protrudes toward the central water body of the pond, showing an arch toward the central area of ​​the water body. The secondary net fence 3 is located outside the primary net fence 2. Initially, the mesh size of the secondary net fence 3 is larger than that of the primary net fence 2. The mesh size of the secondary net fence 3 can be adjusted. Mesh plates 13 are provided on both sides of the base 1. The mesh size of the mesh plates 13 is the same as that of the primary net fence 2, and only small fish that do not meet the fishing conditions can pass through. Therefore, small fish can pass through the secondary net fence 3 to enter the internal area of ​​the primary net fence 2, and can also enter and exit the internal area of ​​the primary net fence 2 from the mesh plates 13. During fishing, if there is a slight noise or fright, the small fish can quickly leave the fishing device area; A sound generator 6 is provided in the central area of ​​the primary net pen 2, which can emit a specific sound to attract or drive away the fish school.

[0030] In the above embodiment, by using the sound generator 6 to emit a specific sound or placing fish feed inside the primary net pen 2, the fish can be attracted to gather at the primary net pen 2. Small fish can enter the primary net pen 2 through the mesh plate 13 or through the secondary net pen 3, while large fish / adult fish can only pass through the secondary net pen 3 and cannot enter the primary net pen 2 area. Once enough adult fish enter the area between the primary net pen 2 and the secondary net pen 3, the mesh size of the secondary net pen 3 is adjusted to be small, so that the adult fish can be restricted between the primary net pen 2 and the secondary net pen 3 and caught, while the small fish can freely pass through the primary net pen 2 and the secondary net pen 3, thereby achieving high efficiency and graded fishing without hurting the young fish.

[0031] Furthermore, the inner concave surface of the base 1 is semicircular; the primary mesh fence 2 is circular; the secondary mesh fence 3 is semicircular; the centers of the inner concave surface, the primary mesh fence 2 and the secondary mesh fence 3 coincide.

[0032] The primary net fence 2 and the secondary net fence 3 are supported by a plurality of columns 4. The columns 4 are cylindrical, and notches 41 are vertically arranged on the cylinders. The primary net fence 2 and the secondary net fence 3 are confined in the notches 41 at multiple locations. The secondary fence 3 can rotate around the center of the fence itself and rise and fall along the axis of the pillars 4 in the support structure of multiple pillars 4. Corresponding devices can be set to drive the rotation and lifting actions.

[0033] In specific implementation, the mesh size of the primary net fence 2 and the mesh plate 13 is smaller than the size that the adult fish can pass through, but larger than the size that the fry can pass through. Initially, the initial mesh size of the secondary net fence 3 is larger than the size that the adult fish can pass through. When the mesh size of the secondary net fence 3 is adjusted, the new mesh size is no longer able to pass through by adult fish, but immature small fish can still pass through.

[0034] The specific operation steps of the grading fishing device in the above embodiment are: The mesh of the secondary net 3 is set to an initial large size that allows adult fish to pass through, and then the fish are introduced into the primary net 2 of the grading fishing device by induction (putting feed) or driving (making noise in other areas). In order to enter the primary net 2, the fish need to first pass through the secondary net 3 and then the primary net 2.

[0035] Due to the mesh size setting of the primary net pen 2 and the secondary net pen 3, non-adult fish can freely pass through the secondary net pen 3 and the primary net pen 2 to reach the primary net pen 2; while adult fish can only enter the area between the secondary net pen 3 and the primary net pen 2. At this time, the mesh size of the secondary net pen 3 is adjusted so that adult fish can no longer pass through the secondary net pen 3. Then, when driving away the fish in the graded fishing device, non-adult fish can freely pass through the primary net pen 2 and the secondary net pen 3 and thus leave, while adult fish cannot leave the area between the primary net pen 2 and the secondary net pen 3, so they can be concentratedly fished, improving the fishing efficiency and avoiding the impact of fishing non-adult fish on the pond aquaculture ecology.

[0036] In the above embodiment, the method of inducing the fish school to enter the primary net pen 2 can be to place fish feed in the primary net pen 2 and / or play the sounds of fish school gathering activities such as fish courtship and feeding; the method of driving the fish school into the primary net pen 2 can be to make sounds in other areas outside the graded fishing device. After the fish school enters the primary net pen 2, the method of driving it away is relatively simple, for example, playing the sounds of predation and noise of the fish school's natural enemies in the primary net pen 2.

[0037] The placement of fish feed and the playing of sounds of fish activities such as courtship and feeding can be done separately or simultaneously, and both have an attractive effect on fish. Even sounds that have no obvious effect on fish behavior can form a conditioned reflex of "sound equals feed" after being acted on fish schools together with the placement of feed for a long time, so that when they hear the sound, they automatically gather towards the sound source. One of the effects of using sound is that the speed of sound propagation is faster than the speed at which the smell of feed spreads in the water, which can make fish schools gather faster.

[0038] For this example, please refer to Figure 2-Figure 6 In order to adjust the mesh size of the secondary net fence 3, the secondary net fence 3 includes a secondary rotating net 30 and a secondary lifting net 31; At the connection between the beginning and the end of the secondary rotating net 30 and the front (front end face) of the base 1, a groove is provided on the base 1. When the secondary rotating net 30 rotates, the beginning or the end can enter the groove, so that the secondary rotating net 30 can rotate. In order to realize the rotation of the secondary rotating net 30, a push-pull power source (such as a hydraulic cylinder) can be provided at the beginning or the end of the secondary rotating net 30. Since the required rotation amplitude is small (less than half the mesh width), pushing or pulling the secondary rotating net 30 only requires a slight rotation angle, so that it is misaligned with the mesh originally overlapped with the secondary lifting net 31. Through the misalignment and overlap of the mesh sizes of the secondary lifting net 31 and the secondary rotating net 30, the effective mesh size that can actually be passed through by fish can be effectively reduced, thereby limiting the adult fish from swimming out of the secondary net 3; The secondary lifting net 31 can be lifted along the pillar 4; The main body sections of the secondary rotating net 30 and the secondary lifting net 31 are both limited by the notches 41 of the columns 4. Under the action of the plurality of columns 4 arranged circumferentially, the secondary net 3 can only rotate in situ or be raised along the columns 4. Initially, the meshes of the secondary rotating net 30 and the secondary lifting net 31 overlap. When the secondary rotating net 30 rotates, the meshes of the secondary rotating net 30 and the secondary lifting net 31 are staggered to achieve mesh size adjustment. The rotation here refers to the rotation of the secondary rotating net 30 as a whole around the axis of the primary net fence 2. The rotation angle does not need to be too large, as long as it is staggered with the mesh of the secondary lifting net 31. The larger the staggered angle, the smaller the size of the superimposed mesh. This setting method allows the mesh size to be freely adjusted to a variety of sizes on the one hand, and on the other hand, the adjustment range is small, and the adjustment can be completed before the fish school is startled and scared away, ensuring that the adult fish are effectively intercepted and prevented from escaping the fishing area.

[0039] This embodiment can be found in Figure 4The secondary lifting net 31 is located inside the secondary rotating net 30. The bottom of the secondary lifting net 31 is fixedly provided with an annular groove 311 between the secondary lifting net 31 and the primary net fence 2. The annular groove 311 is fixed to the secondary lifting net 31. When the secondary lifting net 31 is lifted, the annular groove 311 will also be lifted. A lifting device can be provided to lift the secondary lifting net 31 from the top, for example, by fixing it to the top of the secondary lifting net 31 through a rope, and then lifting it. Its function is that when the fish enter the area between the primary net fence 2 and the secondary net fence 3, the mesh of the secondary net fence 3 changes to intercept the adult fish and release the small fish, and then the adult fish can be lifted out of the water from the water between the primary net fence 2 and the secondary net fence 3 by lifting the secondary lifting net 31.

[0040] In order to facilitate the transportation of adult fish, the depth of the annular groove 311 from the arc apex of the secondary lifting net 31 to the arc start and end gradually deepens along the circumference, that is, a slope is formed. Figure 8 As shown. Its beneficial effect is that once the annular groove 311 is exposed to the water surface, under the action of the inner inclined surface of the annular groove 311, the adult fish will automatically slide out from the middle of the circular arc of the annular groove 311 to both sides and fall onto the table of the base 1, which is convenient for collecting the adult fish. In order to reduce the lifting force of the secondary lifting net 31, mesh holes can be set on the bottom surface of the annular groove 311. During the lifting process of the secondary lifting net 31, especially when it is out of the water, the water in the groove can leak out, only the adult fish are retained, the gravity is reduced, and it is also more convenient to collect and catch the adult fish as a whole.

[0041] Please participate in this example Figure 2-Figure 4 , and further includes a third-level fence 5, the shape and arrangement of the third-level fence 5 are the same as those of the second-level fence 3, but the arc radius and mesh size of the third-level fence 5 are larger than those of the second-level fence 3, and the third-level fence 5 is located outside the second-level fence 3. The initial mesh diameter of the third-level fence 5 is larger than the initial mesh diameter of the second-level fence 3.

[0042] The above beneficial effect is that the size of adult fish is divided into one more level, for example, the area between the first-level net pen 2 and the second-level net pen 3 intercepts adult fish of standard size; the area between the second-level net pen 3 and the third-level net pen 5 intercepts adult fish of larger size and high quality. Thus, the catch and classification of adult fish is more accurate, which is conducive to the subsequent processing of adult fish.

[0043] In order to facilitate the collection of the caught adult fish, a first fish outlet trough 10 is provided on the top of the base body 1 in the area between the primary net pen 2 and the secondary net pen 3; a second fish outlet trough 11 is provided in the area between the secondary net pen 3 and the tertiary net pen 5; After the secondary net fence 3 is raised, the outlet of the annular groove 311 is aligned with the first fish outlet trough 10; after the tertiary net fence 5 is raised, the outlet of the annular groove 311 is aligned with the second fish outlet trough 11; The first fish outlet trough 10 and the second fish outlet trough 11 both have slope surfaces.

[0044] Once the secondary net fence 3 and the tertiary net fence 5 are lifted out of the water, the adult fish automatically slide into the first fish outlet trough 10 and the second fish outlet trough 11 under the action of the inner slope of the annular groove 311, and then automatically slide into the receiving device on the shore, thereby avoiding personnel from working on the base and improving safety.

[0045] The following is an embodiment of a method for grading fishing in aquaculture ponds, using the grading fishing device for aquaculture ponds as described above, comprising: Conduct luring and driving-away conditioning reflex training on the fish in the pond, so that the fish can automatically enter or leave the grading fishing device after receiving the corresponding conditions. This training process can be continued during the breeding process, so that the fish in the pond can go through a long training period from fry to adult fish to form conditioned reflexes; When it is necessary to catch adult fish, the attracting conditioned reflex is triggered in the first-level net pen 2 to attract the fish school to the fishery grading fishing device in the breeding pond. The longer the training time of adult fish is, the easier it is to be attracted. After being attracted, the fish school passes through the third-level net pen 5, the second-level net pen 3 and the first-level net pen 2 in turn according to its own size; After enough fish enter, the rotating nets of the third-level net fence 5 and the second-level net fence 3 rotate and are offset from the grid of the lifting net to reduce the size of the superimposed grid; so that large-sized adult fish are trapped between the third-level net fence 5 and the second-level net fence 3, and standard-sized adult fish are trapped between the second-level net fence 3 and the first-level net fence 2; Then, the expulsion conditioned reflex is triggered in the primary net pen 2, and the fish school is driven away from the fishery grading fishing device of the breeding pond. For adult fish, the fish school is trapped between the secondary net pen 3 and the primary net pen 2, and between the tertiary net pen 5 and the secondary net pen 3 according to their own size, but for smaller fish, they can freely pass through the tertiary net pen 5, the secondary net pen 3 and the primary net pen 2 to escape; After an appropriate time, when the smaller fish are driven away, the lifting nets of the tertiary net fence 5 and the secondary net fence 3 are respectively lifted, so that the heights of the annular grooves 311 of the lifting nets of the tertiary net fence 5 and the secondary net fence 3 are aligned with the first fish outlet trough 10 and the second fish outlet trough 11 respectively, and the adult fish automatically slide into the first fish outlet trough 10 and the second fish outlet trough 11 under the action of the inclined surface in the annular groove 311, and then automatically slide into the receiving device on the shore.

[0046] After all the fish in the first fish outlet trough 10 and the second fish outlet trough 11 are emptied, the initial state of the third-level net pen 5 and the second-level net pen 3 is restored.

[0047] First, through continuous training of conditioned reflexes of attraction and expulsion, fish can automatically enter or leave the grading fishing device according to instructions, greatly improving the efficiency and accuracy of fishing. This training method can start at the fry stage to ensure that the fish form corresponding conditioned reflexes during the breeding cycle and improve fishing efficiency.

[0048] Secondly, the design of the graded fishing device enables adult fish of different sizes to be effectively intercepted and separated, achieving precise fishing of fish of different sizes, avoiding the drawbacks of traditional fishing methods that catch both big and small fish in one net, and improving the sustainable utilization of fishery resources.

[0049] Finally, the fishing process is highly automated. By adjusting the grid offset of the lifting net and the rotating net of the net fence, and utilizing the inclined design of the annular groove, the adult fish can automatically slide into the fish outlet trough, reducing manual operation and labor intensity, while also improving the safety and convenience of fishing operations.

[0050] Furthermore, the induced conditioned reflex training is to place feed in the primary pen 2 area and / or play a sound of the first frequency through the sound generator 6; After the above training, the triggering of the luring conditioned reflex is to place feed and / or play the sound of the first frequency in the first-level pen 2 area; The expulsion conditioned reflex training is that the feed in the primary pen 2 area is consumed and / or the sound of the second frequency is played through the sound generator 6; After the above training, the expulsion conditioned reflex training is triggered when the feed in the first-level fence area 2 is consumed and / or the sound of the second frequency is played.

[0051] By placing feed and / or playing sounds of a specific frequency in the primary pen area for attracting conditioned reflex training, and by consuming feed in the area and / or playing sounds of another frequency for repelling conditioned reflex training, fish can quickly learn to respond accordingly to these conditioned stimuli. For example, they will gather towards the fishing device after the feed is placed and they perceive the sound of the first frequency, and leave on their own after the feed is consumed or they perceive the sound of the second frequency.

[0052] This training method is not only simple and easy to implement, but also highly controllable, and can accurately guide the behavior of the fish school to ensure the smooth progress of the fishing operation. At the same time, due to the use of multiple stimulation methods such as sound and feed, the diversity of training is enhanced, making it easier for the fish school to adapt and form good conditioned reflexes.

[0053] In addition, this training method is highly flexible and adjustable, and can be adjusted according to the habits and needs of different fish (such as their preference for different types of feed and sounds of different frequencies), further optimizing fishing results.

[0054] Furthermore, the first frequency and the second frequency are determined by playing the recorded sound of a specific aquatic organism in the water and observing the reaction of the school of fish. The sound frequency that has a clustering inducing effect on the school of fish is the first frequency, and the sound frequency that has a repelling effect on the school of fish is the second frequency. The sounds of specific aquatic organisms include the sounds of the same species of fish feeding, courting, and flocking, and the sounds of other species of fish hunting and declaring territory.

[0055] Even sounds that have no obvious impact on the activity of fish schools can be combined with the timing of feed delivery to make fish form a positive tendency to respond to such sounds. This, to a certain extent, turns passive fishing gear into active fishing gear, which can greatly improve fishing efficiency. Through sound trapping, fish of different species, sizes and ages can be selectively and healthily caught in a "green" way, thereby effectively protecting broodstock and juveniles, and thus protecting fishery resources.

[0056] In some implementation scenarios, if the fish is carp or grass carp, a 400 Hz sine wave or rectangular wave continuous sound can be used as the sound of the first frequency. In addition to enhancing the fish's response to the sound, the appropriate sound can also promote the fish's utilization of bait.

[0057] In summary, the present invention effectively overcomes various shortcomings in the prior art, can produce beneficial technical effects, and has significant progress.

[0058] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A fishery grading fishing device for aquaculture ponds, which is installed at the junction of the water bank of the aquaculture pond, and is characterized by: include: A base (1), a primary net fence (2) and a secondary net fence (3); The back of the base (1) is close to the bank (7) of the breeding pond, the front of the base (1) faces the center of the pond and is provided with an inner concave surface, the base (1) is a hollow structure, the two side surfaces of the base (1) and the inner concave surface are connected, and the other surfaces are closed; A portion of the first-level net (2) is embedded in the inner concave surface, and another portion protrudes toward the central water body of the pond; The starting and ending ends of the secondary net fence (3) are connected to the front of the base body (1), and the main body section of the secondary net fence (3) also protrudes toward the central water body of the pond; The secondary net fence (3) is located outside the primary net fence (2), the mesh size of the secondary net fence (3) is larger than the mesh size of the primary net fence (2), and the mesh size of the secondary net fence (3) is adjustable; A sound generator (6) is provided in the central area of ​​the primary fence (2).

2. The aquaculture pond fishery classification and catching device according to claim 1, characterized in that: The inner concave surface is semicircular; The primary fence (2) is circular; The secondary fence (3) is semicircular; The centers of the inner concave surface, the primary net fence (2) and the secondary net fence (3) coincide with each other.

3. The aquaculture pond fishery classification and catching device according to claim 2, characterized in that: The primary net fence (2) and the secondary net fence (3) are both supported by a plurality of upright posts (4), the upright posts (4) being cylindrical, and having notches (41) vertically arranged on the cylinders, and the primary net fence (2) and the secondary net are confined in the notches (41) at multiple locations; The secondary fence (3) can rotate around the center of the fence itself in the support structure of multiple columns (4) and can be raised and lowered along the axis of the columns (4).

4. The aquaculture pond fishery classification and catching device according to claim 3, characterized in that: The secondary net fence (3) comprises a secondary rotating net (30) and a secondary lifting net (31); At the connection points between the starting end and the ending end of the secondary rotating net (30) and the front of the base (1), a groove is provided on the base (1), and when the secondary rotating net (30) rotates, the starting end or the ending end can enter the groove; The secondary lifting net (31) can be lifted along the upright column (4); The main body sections of the secondary rotating net (30) and the secondary lifting net (31) are both restricted by the notches (41) of the upright posts (4); Initially, the meshes of the secondary rotating net (30) and the secondary lifting net (31) overlap, and when the secondary rotating net (30) rotates at an angle, the meshes of the secondary rotating net (30) and the secondary lifting net (31) are staggered to achieve mesh size adjustment.

5. The aquaculture pond fishery classification and catching device according to claim 4, characterized in that: The secondary lifting net (31) is located inside the secondary rotating net (30), and an annular groove (311) is fixedly provided at the bottom of the secondary lifting net (31) between the secondary lifting net (31) and the primary net fence (2); The depth of the annular groove (311) gradually increases along the circumference from the arc apex to the arc start and end of the secondary lifting net (31).

6. The aquaculture pond fishery classification and catching device according to claim 5, characterized in that: It also includes a third-level net fence (5), the shape and arrangement of the third-level net fence (5) are the same as those of the second-level net fence (3), but the arc radius and mesh size of the third-level net fence (5) are larger than those of the second-level net fence (3), and the third-level net fence (5) is located outside the second-level net fence (3).

7. The aquaculture pond fishery classification and catching device according to claim 6, characterized in that: A first fish outlet trough (10) is provided in the area between the first-level net pen (2) and the second-level net pen (3) on the top of the base (1); and a second fish outlet trough (11) is provided in the area between the second-level net pen (3) and the third-level net pen (5); After the secondary net fence (3) is raised in height, the outlet of the annular groove (311) is aligned with the first fish outlet groove (10); after the tertiary net fence (5) is raised in height, the outlet of the annular groove (311) is aligned with the second fish outlet groove (11); The first fish outlet trough (10) and the second fish outlet trough (11) are both sloped surfaces.

8. A method for graded fishing in aquaculture ponds, characterized in that: The aquaculture pond fishery classification fishing device according to claim 7 comprises: Conduct luring and driving away conditioned reflex training on fish in the pond; An allure conditioned reflex is triggered in the primary net pen (2) to attract the fish school to the aquaculture pond fishery grading fishing device, and the fish school passes through the third-level net pen (5), the second-level net pen (3) and the first-level net pen (2) in sequence according to its own size; The rotating nets of the third-level net fence (5) and the second-level net fence (3) rotate and are offset from the mesh of the lifting net to reduce the mesh size; A repelling conditioned reflex is triggered in the primary net pen (2), so that the fish school is driven away from the aquaculture pond fishery grading fishing device, and the fish school is intercepted between the secondary net pen (3) and the primary net pen (2), and between the third-level net pen (5) and the secondary net pen (3) according to its own size; The lifting nets of the third-level net fence (5) and the second-level net fence (3) are respectively lifted, so that the heights of the annular grooves (311) of the lifting nets of the third-level net fence (5) and the second-level net fence (3) are aligned with the first fish outlet trough (10) and the second fish outlet trough (11) respectively; After all the fish in the first fish outlet trough (10) and the second fish outlet trough (11) are emptied, the initial state of the third-level net pen (5) and the second-level net pen (3) is restored.

9. The method for grading fisheries in aquaculture ponds according to claim 8, characterized in that: The induced conditioned reflex training is to place feed in the area of ​​the primary net pen (2) and / or play a sound of the first frequency through the sound generator (6); triggering the induced conditioned reflex is to place feed in the area of ​​the primary net pen (2) and / or play a sound of the first frequency; The expulsion conditioned reflex training is that the feed in the primary pen (2) area is consumed and / or a sound of a second frequency is played through the sound generator (6); The expulsion conditioned reflex training is triggered when the feed in the primary pen (2) area is consumed and / or a sound of the second frequency is played.

10. The method for grading fishery in aquaculture ponds according to claim 9, characterized in that: The first frequency and the second frequency are determined by playing the recorded sound of a specific aquatic organism in water, the sound frequency that has a clustering inducing effect on the school of fish is the first frequency, and the sound frequency that has a repelling effect on the school of fish is the second frequency; The sounds of the specific aquatic organisms include the sounds of the same species of fish feeding, courting, and clustering, and the sounds of other species of fish preying and declaring territory.

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