A grading device and method for aquaculture pond fisheries

Abstract

The application provides a breeding pond fishery grading catching device and method, and belongs to the technical field of aquaculture, and is used for solving the problem that a large number of immature small fish are caught due to the non-selective catching mode in the prior art. The application provides a breeding pond fishery grading catching device and method, which comprises a base body, a first net barrier and a second net barrier. The base body is arranged towards the center of the pond and is provided with an inner concave surface. The two side surfaces and the inner concave surface of the base body are through, and the other surfaces are closed. A part of the first net barrier is embedded with the inner concave surface, and the other part is protruded towards the water body in the center of the pond. The initial end and the terminal end of the second net barrier are connected with the front surface of the base body. The mesh size of the second net barrier is greater than that of the first net barrier at the initial time, and the mesh size of the second net barrier can be adjusted. The central region of the first net barrier is provided with a sound generator. The device cooperates with the method, effectively solves the problem of fishery resource damage caused by non-selective catching in the traditional catching mode, provides a grading and efficient catching scheme, and promotes the sustainability of catching.

Description

Technical Field

[0001] This invention belongs to the field of aquaculture technology, and in particular relates to a device and method for graded fishing in aquaculture ponds. Background Technology

[0002] In pond aquaculture, the stocking of fry and the harvesting of adult fish are carried out alternately. Fish at different growth stages, such as fry, immature small fish, and mature large fish, often coexist in the pond simultaneously. Traditional fishing methods mainly rely on fishing nets. To ensure fishing efficiency, the mesh size of the nets cannot be too large, resulting in a mix of fish of different sizes in the catch.

[0003] This non-selective fishing method not only affects the rational use of fishery resources, but may also lead to the harvesting of a large number of immature small fish, posing a threat to the sustainability and economic viability of aquaculture. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a fishery grading and harvesting device and method for aquaculture ponds, which solves the problem that non-selective harvesting methods in the prior art result in the harvesting of a large number of immature small fish.

[0005] To achieve the above and other related objectives, the present invention provides a device and method for graded fishing in aquaculture ponds.

[0006] The fishery grading and harvesting device for aquaculture ponds is installed at the water-shore junction of the aquaculture pond and includes:

[0007] The substrate, primary mesh, and secondary mesh;

[0008] The back of the substrate is against the bank of the aquaculture pond, the front of the substrate faces the center of the pond and has a concave surface, the substrate has a hollow structure, the two sides and the concave surface of the substrate are connected, and the other surfaces are closed.

[0009] One part of the primary netting is fitted into the concave surface, and the other part protrudes towards the center of the pond.

[0010] The beginning and end of the secondary mesh are connected to the front of the base, and the main body of the secondary mesh also protrudes towards the center of the pond.

[0011] The secondary mesh barrier is located outside the primary mesh barrier. The mesh size of the secondary mesh barrier is larger than that of the primary mesh barrier, and the mesh size of the secondary mesh barrier is adjustable.

[0012] A sound generator is installed in the central area of ​​the primary mesh barrier.

[0013] Optionally, the concave surface is semi-circular;

[0014] The primary mesh barrier is circular;

[0015] The secondary mesh barrier is semi-circular;

[0016] The concave surface, the primary mesh barrier, and the secondary mesh barrier have their centers coincide.

[0017] Optionally, both the primary and secondary mesh barriers are supported by multiple columns, each column being cylindrical with vertical slots on it, and the primary and secondary mesh barriers being located within these slots in multiple places.

[0018] The secondary mesh barrier can rotate around its own center and rise and fall along the column axis within multiple column support structures.

[0019] Optionally, the secondary mesh barrier includes a secondary rotating mesh and a secondary lifting mesh;

[0020] The starting and ending points of the secondary rotating net are connected to the front of the substrate, and the substrate is provided with grooves so that the starting or ending point can enter the grooves when the secondary rotating net rotates.

[0021] The secondary lifting net can be lifted along the column;

[0022] The main body sections of both the secondary rotating net and the secondary lifting net are limited by the slots of the columns;

[0023] Initially, the mesh openings of the secondary rotating mesh and the secondary lifting mesh overlap. When the secondary rotating mesh rotates by an angle, the mesh openings of the secondary rotating mesh and the secondary lifting mesh are staggered to achieve mesh size adjustment.

[0024] 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 barrier;

[0025] The depth of the annular groove gradually increases along the circumference from the arc apex of the secondary lifting net to the beginning and end of the arc.

[0026] Optionally, it also includes a third-level mesh barrier, which has the same shape and arrangement as the second-level mesh barrier, but the arc radius and mesh size of the third-level mesh barrier are larger than those of the second-level mesh barrier, and the third-level mesh barrier is located on the periphery of the second-level mesh barrier.

[0027] Optionally, a first fish outlet trough is provided in the area between the primary net barrier and the secondary net barrier on the top of the base; a second fish outlet trough is provided in the area between the secondary net barrier and the tertiary net barrier.

[0028] After the secondary net barrier is raised, the outlet of the annular trough is aligned with the first fish outlet trough; after the tertiary net barrier is raised, the outlet of the annular trough is aligned with the second fish outlet trough.

[0029] Both the first and second fish outlet channels are sloping surfaces.

[0030] The method for graded harvesting in aquaculture ponds employs the graded harvesting device for aquaculture ponds as described above, including:

[0031] Conduct attraction-based conditioning and disengagement-based conditioning training on fish in the pond;

[0032] The attraction conditioned reflex is triggered within the first-level net barrier, attracting the fish to the fishery graded harvesting device in the aquaculture pond. The fish then pass through the third-level net barrier, the second-level net barrier, and the first-level net barrier in sequence according to their size.

[0033] The rotating mesh of the third-level and second-level mesh barriers rotates and is misaligned with the mesh of the lifting mesh to reduce the mesh size;

[0034] Within the primary net enclosure, a repulsive conditioned reflex is triggered, driving the fish away from the fishery grading and harvesting device in the aquaculture pond. The fish are trapped between the secondary and primary net enclosures, and between the tertiary and secondary net enclosures, according to their size.

[0035] Raise the lifting nets of the third-level and second-level nets respectively, so that the height of the annular grooves of the lifting nets of the third-level and second-level nets are aligned with the first and second fish outlet channels respectively;

[0036] After all the fish in the first and second fish outlets have been emptied, restore the initial state of the third and second level net barriers.

[0037] Optionally, the induced conditioning training involves placing feed in the primary mesh area and / or playing a sound of a first frequency through the sound generator; triggering the induced conditioning involves placing feed in the primary mesh area and / or playing a sound of a first frequency.

[0038] The disengagement conditioning training is performed when the feed in the primary netting area is consumed and / or when a second frequency sound is played through the sound generator.

[0039] The disengagement conditioning training is triggered when the feed in the primary netting area is consumed and / or when a sound of the second frequency is played.

[0040] Optionally, the first frequency and the second frequency are determined by playing the recorded sounds of specific aquatic organisms in the water, wherein the sound frequency that induces fish to cluster is the first frequency, and the sound frequency that drives fish away is the second frequency.

[0041] The sounds of specific aquatic organisms include the sounds of the same species of fish feeding, courting, and gathering, as well as the sounds of other species of fish hunting and asserting their territory.

[0042] As described above, the aquaculture pond fishery grading and harvesting device and method of the present invention have at least the following beneficial effects:

[0043] By using a primary and secondary net barrier, the system effectively solves the problems of resource waste and pond fish population disruption caused by non-selective fishing in traditional methods. The primary net barrier intercepts small fish, maintaining the ecological balance of the fisheries and preventing their harvesting; the secondary net barrier catches larger fish, ensuring economic benefits for the fisheries. Simultaneously, a sound generator at the center of the primary net barrier attracts fish, improving harvesting efficiency and accuracy. This tiered fishing device provides a graded and efficient fishing solution. Combined with this method, the device not only improves the efficiency of fishery resource harvesting but also promotes the sustainability of fisheries. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the overall invention.

[0045] Figure 2 The diagram shown is a top view of the present invention.

[0046] Figure 3 This invention is shown as Figure 2 A magnified view of a portion of point A in the middle.

[0047] Figure 4 The diagram shown is a schematic of the multi-level net barrier of the present invention.

[0048] Figure 5 The diagram shown is a schematic of the secondary net barrier of this invention.

[0049] Figure 6 This invention is shown as Figure 5 A magnified view of a portion of point B in the middle.

[0050] Figure 7 The diagram shown is a schematic representation of the substrate of this invention.

[0051] Figure 8 The diagram shows the lifting net of the three-level net barrier of the present invention in the lifting state.

[0052] The components include: base 1, first fish outlet 10, second fish outlet 11, net plate 13, primary net barrier 2, secondary net barrier 3, secondary rotating net 30, secondary lifting net 31, annular trough 311, column 4, trough opening 41, tertiary net barrier 5, sound generator 6, and shore base 7. Detailed Implementation

[0053] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0054] Please see Figures 1 to 8It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0055] The following embodiments are for illustrative purposes only. These embodiments can be combined and are not limited to the content shown in any single embodiment below.

[0056] Please refer to this embodiment. Figures 1-8 The embodiment of the fishery grading and harvesting device for aquaculture ponds provided by the present invention is installed at the water-shore junction of the aquaculture pond, and multiple devices can be installed according to the size of the aquaculture pond, including:

[0057] Matrix 1, primary mesh 2 and secondary mesh 3;

[0058] The back of the base 1 is against the bank base 7 of the aquaculture pond. The front of the base 1 (the front end face of the base 1) faces the center of the pond and has a concave surface on the front side. The base 1 is a hollow structure and can be assembled by pouring concrete and setting up grid panels. The two sides and the concave surface of the base 1 are connected, while the other surfaces are closed.

[0059] One part of the primary mesh 2 is fitted into the concave surface, and the other part protrudes towards the center of the pond. Since the concave surface is through and the base 1 has a cavity structure, the primary mesh 2 is equivalent to being directly connected to the pond water through the two sides of the base 1.

[0060] The beginning and end of the secondary mesh 3 are connected to the front of the base 1 to divide the water body. The main body of the secondary mesh 3 also protrudes towards the center of the pond, presenting an arch towards the central area of ​​the water body.

[0061] The secondary net barrier 3 is located outside the primary net barrier 2. Initially, the mesh size of the secondary net barrier 3 is larger than that of the primary net barrier 2. The mesh size of the secondary net barrier 3 is adjustable. Net plates 13 are installed on both sides of the base 1. The mesh size of the net plates 13 is the same as that of the primary net barrier 2, allowing only small fish that do not meet the fishing requirements to pass through. Therefore, small fish can pass through the secondary net barrier 3 to enter the inner area of ​​the primary net barrier 2, and can also enter and exit the inner area of ​​the primary net barrier 2 through the net plates 13. During fishing, the slightest sound or fright can cause the small fish to quickly leave the fishing area.

[0062] The central area of ​​the first-level net barrier 2 is equipped with a sound generator 6, which can emit specific sounds to attract or drive away fish.

[0063] In the above embodiments, by emitting a specific sound using the sound generator 6 or by placing fish feed inside the primary net barrier 2, fish can be attracted to gather at the primary net barrier 2. Small fish can enter the primary net barrier 2 through the net plate 13 or through the secondary net barrier 3, while large / adult fish can only pass through the secondary net barrier 3 and cannot enter the area of ​​the primary net barrier 2. Once enough adult fish have entered the area between the primary net barrier 2 and the secondary net barrier 3, the mesh size of the secondary net barrier 3 can be reduced to confine the adult fish between the primary net barrier 2 and the secondary net barrier 3 for harvesting, while small fish can freely pass through the primary net barrier 2 and the secondary net barrier 3, thereby achieving efficient and harmless graded harvesting of juvenile fish.

[0064] Furthermore, the concave surface of the substrate 1 is semi-circular; the primary mesh barrier 2 is circular; the secondary mesh barrier 3 is semi-circular; and the centers of the concave surface, the primary mesh barrier 2, and the secondary mesh barrier 3 coincide.

[0065] Both the primary net fence 2 and the secondary net fence 3 are supported by multiple columns 4. The columns 4 are cylindrical, and slots 41 are vertically provided on the columns. The primary net fence 2 and the secondary net fence 3 are confined within the slots 41 in multiple places.

[0066] The secondary mesh barrier 3 can rotate around its own center and rise and fall along the axis of the column 4 within the support structure of multiple columns 4. Corresponding devices can be set to drive the rotation and rising and falling actions.

[0067] In practice, the mesh size of the primary net barrier 2 and the net plate 13 is smaller than that that adult fish can pass through, but larger than that that fry can pass through. Initially, the mesh size of the secondary net barrier 3 is larger than that that adult fish can pass through. After the mesh size of the secondary net barrier 3 is adjusted, the new mesh size is no longer able to be passed through by adult fish, but immature fry can still pass through.

[0068] The specific operating steps of the graded fishing device in the above embodiment are as follows:

[0069] The mesh size of the secondary net barrier 3 is set to an initial large size that allows adult fish to pass through. Then, the fish are introduced into the primary net barrier 2 of the grading fishing device by inducing (feeding) or driving (making noise in other areas). In order to enter the primary net barrier 2, the fish need to pass through the secondary net barrier 3 and then through the primary net barrier 2.

[0070] Due to the mesh size settings of the primary net barrier 2 and the secondary net barrier 3, non-adult fish can freely pass through the secondary net barrier 3 and the primary net barrier 2 to reach the primary net barrier 2; while adult fish can only enter the area between the secondary net barrier 3 and the primary net barrier 2. At this point, the mesh size of the secondary net barrier 3 is adjusted so that adult fish can no longer pass through it. Then, when the fish are driven away from the tiered fishing device, non-adult fish can freely pass through the primary net barrier 2 and the secondary net barrier 3 and thus leave, while adult fish cannot leave the area between the primary net barrier 2 and the secondary net barrier 3. This allows for concentrated fishing, improves fishing efficiency, and avoids the impact of catching non-adult fish on the pond aquaculture ecosystem.

[0071] In the above embodiments, the methods for inducing fish to enter the primary net barrier 2 can be by placing fish feed inside the primary net barrier 2 and / or playing sounds of fish courtship and feeding activities; the methods for driving fish into the primary net barrier 2 can be by creating sounds in other areas outside the grading and catching device. Once the fish have entered the primary net barrier 2, the methods for driving them away are relatively simple, such as playing sounds of predation by the fish's natural enemies or other noises inside the primary net barrier 2.

[0072] Distributing fish food and playing sounds of fish courtship and feeding can be done individually or simultaneously, both of which attract fish. Even sounds that don't immediately affect fish behavior can, over time, create a conditioned reflex in the fish that "sound equals food," causing them to automatically gather towards the sound source. One advantage of using sound is that it travels faster than the scent of food in water, allowing fish to gather more quickly.

[0073] Please refer to this embodiment. Figures 2-6 To enable the adjustment of the mesh size of the secondary mesh barrier 3, the secondary mesh barrier 3 includes a secondary rotating mesh 30 and a secondary lifting mesh 31;

[0074] At the connection points between the beginning and end of the secondary rotating net 30 and the front (front face) of the base 1, grooves are provided on the base 1. When the secondary rotating net 30 rotates, the beginning or end can enter the grooves, allowing the secondary rotating net 30 to rotate. To achieve the rotation of the secondary rotating net 30, a push-pull power source (e.g., a hydraulic cylinder) can be provided at the beginning or 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 at an angle, causing it to misalign with the mesh of the secondary lifting net 31 that originally overlapped. 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 fish can actually pass through can be effectively reduced, thereby restricting adult fish from swimming out of the secondary net barrier 3.

[0075] The secondary lifting net 31 can be lifted along the column 4;

[0076] The main body sections of the secondary rotating net 30 and the secondary lifting net 31 are both restricted by the slots 41 of the columns 4. Under the action of multiple columns 4 arranged in a circle, the secondary net barrier 3 can only rotate in place or be lifted along the columns 4.

[0077] Initially, the mesh openings of the secondary rotating net 30 and the secondary lifting net 31 overlap. As the secondary rotating net 30 rotates, the mesh openings of the secondary rotating net 30 and the secondary lifting net 31 are staggered, thus adjusting the mesh size. Here, "rotation" refers to the secondary rotating net 30 rotating as a whole around the axis of the primary net barrier 2. The rotation angle does not need to be too large, as long as it is staggered with the mesh openings of the secondary lifting net 31. The larger the staggered angle, the smaller the size of the overlapping mesh openings. This setting allows the mesh size to be freely adjusted to various sizes, and the adjustment range is small, allowing it to be completed before the fish are startled and scared away, ensuring effective interception of adult fish and preventing them from escaping the fishing area.

[0078] This embodiment can be referred to. Figure 4 The secondary lifting net 31 is located inside the secondary rotating net 30, at its bottom. An annular groove 311 is fixedly installed between the secondary lifting net 31 and the primary net barrier 2. The annular groove 311 is fixed to the secondary lifting net 31, and when the secondary lifting net 31 is lifted, the annular groove 311 also lifts. A lifting device can be installed to lift the secondary lifting net 31 from the top, for example, by fixing it to the top of the secondary lifting net 31 with ropes before lifting. Its function is that when a school of fish enters the area between the primary net barrier 2 and the secondary net barrier 3, the changes in the mesh size of the secondary net barrier 3 trap adult fish and release small fish. Then, by lifting the secondary lifting net 31, the adult fish can be pulled out of the water between the primary net barrier 2 and the secondary net barrier 3.

[0079] To facilitate the transfer of adult fish, the depth of the annular trough 311 gradually increases along the circumference from the apex of the arc of the secondary lifting net 31 to the beginning and end of the arc, thus forming a slope. Figure 8 As shown. Its beneficial effect is that once the annular trough 311 emerges from the water surface, the adult fish will automatically slide out from the center of the arc of the annular trough 311 to both sides under the action of the inclined surface inside the annular trough 311, falling onto the platform of the base 1, making it easier to collect the adult fish. To reduce the lifting force of the secondary lifting net 31, mesh holes can be set on the bottom surface of the annular trough 311. During the lifting process of the secondary lifting net 31, especially when it leaves the water surface, the water in the trough can leak out, leaving only the adult fish, reducing gravity, and making it easier to collect and catch the adult fish as a whole.

[0080] Please participate in this embodiment. Figures 2-4It also includes a third-level mesh barrier 5, which has the same shape and arrangement as the second-level mesh barrier 3, but the radius of curvature and mesh size of the third-level mesh barrier 5 are larger than those of the second-level mesh barrier 3. The third-level mesh barrier 5 is located on the periphery of the second-level mesh barrier 3. The initial mesh diameter of the third-level mesh barrier 5 is larger than that of the second-level mesh barrier 3.

[0081] The aforementioned beneficial effect is that it adds an extra tier to the classification of adult fish by size. For example, the area between the primary net barrier 2 and the secondary net barrier 3 traps standard-sized adult fish; while the area between the secondary net barrier 3 and the tertiary net barrier 5 traps larger, higher-quality adult fish. This makes the grading of adult fish more precise, which is beneficial for subsequent processing.

[0082] To facilitate the collection of caught adult fish, a first fish outlet 10 is provided in the area between the primary net barrier 2 and the secondary net barrier 3 on the top of the base 1; a second fish outlet 11 is provided in the area between the secondary net barrier 3 and the tertiary net barrier 5.

[0083] After the secondary net barrier 3 is raised, the outlet of the annular groove 311 is aligned with the first fish outlet groove 10; after the tertiary net barrier 5 is raised, the outlet of the annular groove 311 is aligned with the second fish outlet groove 11.

[0084] Both the first fish outlet trough 10 and the second fish outlet trough 11 are sloping surfaces.

[0085] Once the secondary net barrier 3 and the tertiary net barrier 5 are lifted out of the water, the adult fish automatically slide into the first fish outlet channel 10 and the second fish outlet channel 11 under the action of the inclined surface in the annular channel 311, and then automatically slide into the receiving device on the shore base. This avoids personnel working on the base and improves safety.

[0086] The following is an embodiment of a method for graded harvesting in aquaculture ponds, employing the graded harvesting device for aquaculture ponds as described above, including:

[0087] The fish in the pond are trained using both attraction-based and repulsion-based conditioning, enabling them to automatically group into or leave the graded harvesting device upon receiving the corresponding conditions. This training process can be continued throughout the aquaculture process, allowing the fish in the pond to undergo a relatively long training period from fry to adult fish to form conditioned reflexes.

[0088] When it is necessary to catch adult fish, the attraction conditional reflex is triggered within the first-level net barrier 2, attracting the fish to the fish grading and catching device in the aquaculture pond. The longer the training time, the easier it is to attract the adult fish. After being attracted, the fish pass through the third-level net barrier 5, the second-level net barrier 3 and the first-level net barrier 2 in sequence according to their own size.

[0089] Once a sufficient number of fish have entered, the rotating nets of the third-level net barrier 5 and the second-level net barrier 3 rotate and are misaligned with the mesh of the lifting net to reduce the size of the overlapping mesh; thus, large adult fish are trapped between the third-level net barrier 5 and the second-level net barrier 3, and standard-sized adult fish are trapped between the second-level net barrier 3 and the first-level net barrier 2.

[0090] Next, a repulsion conditioned reflex is triggered within the first-level net barrier 2, driving the fish away from the fish grading and fishing device in the aquaculture pond. For adult fish, the fish are trapped between the second-level net barrier 3 and the first-level net barrier 2, and between the third-level net barrier 5 and the second-level net barrier 3 according to their own size. However, for smaller fish, they can freely pass through the third-level net barrier 5, the second-level net barrier 3 and the first-level net barrier 2 to escape.

[0091] After a suitable time, once the smaller fish have been driven away, the lifting nets of the third-level net barrier 5 and the second-level net barrier 3 are raised respectively, so that the height of the annular groove 311 of the lifting nets of the third-level net barrier 5 and the second-level net barrier 3 is aligned with the first fish outlet groove 10 and the second fish outlet groove 11 respectively. The adult fish automatically slide into the first fish outlet groove 10 and the second fish outlet groove 11 under the action of the inclined surface in the annular groove 311, and then automatically slide into the receiving device on the shore.

[0092] After all the fish in the first fish outlet 10 and the second fish outlet 11 have been cleared, restore the initial state of the third-level net barrier 5 and the second-level net barrier 3.

[0093] First, through continuous conditioned reflex training involving attraction and disengagement, fish are trained to automatically enter or leave the grading and harvesting device according to instructions, significantly improving harvesting efficiency and accuracy. This training method can begin at the fry stage, ensuring that the fish develop the corresponding conditioned reflexes throughout the rearing cycle, thereby enhancing harvesting efficiency.

[0094] Secondly, the design of the grading fishing device enables the effective interception and separation of adult fish of different sizes, achieving precise fishing of fish of different sizes. This avoids the drawback of traditional fishing methods that catch both large and small fish in one net, and improves the sustainable use of fishery resources.

[0095] Finally, the fishing process is highly automated. By adjusting the mesh misalignment of the lifting and rotating nets of the net barrier, and by utilizing the inclined design of the annular trough, adult fish can automatically slide into the fish discharge trough, reducing manual operation, lowering labor intensity, and improving the safety and convenience of fishing operations.

[0096] Furthermore, the induced conditioning training involves placing feed in the first-level net barrier area 2 and / or playing a sound of the first frequency through the sound generator 6;

[0097] After the above training, the induced conditioned reflex is triggered by placing feed and / or playing a sound of the first frequency in area 2 of the first-level net barrier.

[0098] Disengagement conditioning training involves the depletion of feed in area 2 of the primary net barrier and / or the playback of a second frequency sound through a sound generator 6.

[0099] After the above training, the trigger for disengagement conditioning training is the depletion of feed in area 2 of the first-level net barrier and / or the playing of a second frequency sound.

[0100] By providing bait and / or playing a specific frequency of sound in the primary netting area to induce conditioned reflexes, and by providing deflection conditioned reflexes when the bait is consumed in that area and / or when a different frequency of sound is played, fish can quickly learn to respond accordingly to these stimuli. For example, after being fed and sensing the first frequency of sound, they will gather towards the fishing device, and leave on their own after the bait is consumed or when they sense the second frequency of sound.

[0101] This training method is not only simple and easy to implement, but also highly controllable, enabling precise guidance of fish behavior and ensuring the smooth progress of fishing operations. Furthermore, the use of multiple stimuli, such as sound and feed, enhances the diversity of training, making it easier for the fish to adapt and develop positive conditioned reflexes.

[0102] In addition, this training method is highly flexible and adjustable, and can be tailored to the habits and needs of different fish species (such as their preference for different types of feed and different frequencies of sound) to further optimize the fishing results.

[0103] Furthermore, the first and second frequencies are determined as follows: the sounds of specific aquatic organisms recorded in the water are played and the fish's reaction is observed. The sound frequency that induces the fish to cluster is the first frequency, and the sound frequency that drives the fish away is the second frequency.

[0104] The sounds of specific aquatic organisms include the sounds of the same species of fish feeding, courting, and gathering, as well as the sounds of other species of fish hunting and asserting their territory.

[0105] Even sounds that don't significantly affect fish activity can, when combined with the timing of feed distribution, induce a positive directional response in fish. This effectively transforms passive fishing gear into active fishing gear, greatly improving catch efficiency. By using sound-based trapping, selective and healthy "green" fishing can be achieved for different species, sizes, and ages of fish, thus effectively protecting broodstock and juvenile fish, and ultimately conserving fishery resources.

[0106] In certain implementation scenarios, if the fish are carp or grass carp, a 400 Hz sine wave or rectangular wave continuous tone can be used as the first frequency sound. In addition to enhancing the fish's response to the sound, the appropriate sound can also promote the fish's utilization of the bait.

[0107] In summary, the present invention effectively overcomes the various shortcomings of the prior art, produces beneficial technical effects, and has made significant progress.

[0108] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can 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 those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A fishery grading and harvesting device for aquaculture ponds, installed at the water-shore junction of an aquaculture pond, characterized in that, include: The substrate (1), the primary mesh (2), and the secondary mesh (3); The back of the substrate (1) is against the shore base (7) of the aquaculture pond, the front of the substrate (1) faces the center of the pond and has a concave surface, the substrate (1) has a hollow structure, the two sides and the concave surface of the substrate (1) are connected, and the other surfaces are closed. One part of the primary netting (2) fits into the concave surface, and the other part protrudes towards the center of the pond. The beginning and end of the secondary mesh (3) are connected to the front of the base (1), and the main body section of the secondary mesh (3) also protrudes towards the center of the pond. The secondary mesh (3) is located outside the primary mesh (2), the mesh size of the secondary mesh (3) is larger than that of the primary mesh (2), and the mesh size of the secondary mesh (3) can be adjusted. A sound generator (6) is provided in the central area of ​​the primary mesh barrier (2). The concave surface is semi-circular; The primary mesh barrier (2) is circular; The secondary mesh barrier (3) is semi-circular; The concave surface, the primary mesh barrier (2), and the secondary mesh barrier (3) have their centers coincide; The primary fence (2) and the secondary fence (3) are both supported by multiple columns (4). The columns (4) are cylindrical and have slots (41) vertically arranged on them. The primary fence (2) and the secondary fence (3) are located within the slots (41) in multiple places. The secondary net barrier (3) can rotate around the center and rise and fall along the axis of the column (4) in the support structure of multiple columns (4); The secondary mesh barrier (3) includes a rotating mesh (30) and a lifting mesh (31). The beginning and end of the rotating net (30) are connected to the front of the base (1). The base (1) is provided with a groove. When the rotating net (30) rotates, the beginning or end can enter the groove. The lifting net (31) can be lifted along the column (4); The main body sections of the rotating net (30) and the lifting net (31) are both limited by the slots (41) of the column (4); Initially, the meshes of the rotating mesh (30) and the lifting mesh (31) overlap. When the rotating mesh (30) rotates by an angle, the meshes of the rotating mesh (30) and the lifting mesh (31) are staggered to achieve mesh size adjustment.

2. The aquaculture pond graded harvesting device as described in claim 1, characterized in that: The lifting net (31) is located inside the rotating net (30). At the bottom of the lifting net (31), an annular groove (311) is fixedly provided between the lifting net (31) and the first-level net barrier (2). The depth of the annular groove (311) gradually increases along the circumference from the arc apex of the lifting net (31) to the arc beginning and end.

3. The aquaculture pond graded harvesting device as described in claim 2, characterized in that: It also includes a third-level mesh barrier (5), which has the same shape and arrangement as the second-level mesh barrier (3), but the arc radius and mesh size of the third-level mesh barrier (5) are larger than those of the second-level mesh barrier (3), and the third-level mesh barrier (5) is located on the periphery of the second-level mesh barrier (3).

4. The aquaculture pond fishery grading and harvesting device as described in claim 3, characterized in that: Located on the top of the base (1), a first fish outlet trough (10) is provided in the area between the first-level net barrier (2) and the second-level net barrier (3); a second fish outlet trough (11) is provided in the area between the second-level net barrier (3) and the third-level net barrier (5). After the height of the secondary net barrier (3) is increased, the outlet of the annular groove (311) is aligned with the first fish outlet groove (10); after the height of the tertiary net barrier (5) is increased, the outlet of the annular groove (311) is aligned with the second fish outlet groove (11). Both the first fish outlet trough (10) and the second fish outlet trough (11) are sloping surfaces.

5. A method for graded harvesting in aquaculture ponds, characterized in that, The aquaculture pond fishery grading and harvesting device as described in claim 4 includes: Conduct attraction-based conditioning and disengagement-based conditioning training on fish in the pond; The attraction conditioned reflex is triggered within the first-level net barrier (2), attracting the fish to the fishery graded fishing device in the aquaculture pond. The fish pass through the third-level net barrier (5), the second-level net barrier (3) and the first-level net barrier (2) in sequence according to their size. The rotating mesh of the third-level mesh barrier (5) and the second-level mesh barrier (3) rotates and is misaligned with the mesh of the lifting mesh to reduce the mesh size; The repulsion conditioned reflex is triggered within the first-level net (2), driving the fish away from the fishery graded fishing device in the aquaculture pond. The fish are trapped between the second-level net (3) and the first-level net (2), and between the third-level net (5) and the second-level net (3) according to their own size. Raise the lifting nets of the third-level net barrier (5) and the second-level net barrier (3) respectively, so that the height of the annular groove (311) of the lifting nets of the third-level net barrier (5) and the second-level net barrier (3) is 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 (10) and the second fish outlet (11) are emptied, restore the initial state of the third-level net barrier (5) and the second-level net barrier (3).

6. The method for graded harvesting in aquaculture ponds as described in claim 5, characterized in that: The induced conditioning training is to place feed in the area of ​​the primary net barrier (2) and / or play a sound of the first frequency through the sound generator (6); the induced conditioning is triggered by placing feed in the area of ​​the primary net barrier (2) and / or playing a sound of the first frequency. The disengagement conditioning training is performed when the feed in the primary netting (2) area is consumed and / or a second frequency sound is played through the sound generator (6); The triggering of the disengagement conditioned reflex training is when the feed in the first-level net barrier (2) area is consumed and / or a sound of the second frequency is played.

7. The method for graded harvesting in aquaculture ponds as described in claim 6, characterized in that: The first frequency and the second frequency are determined as follows: the sound of a specific aquatic organism recorded in the water is played, and the sound frequency that has a grouping induction effect on the fish is the first frequency, and the sound frequency that has a repelling effect on the fish is the second frequency. The sounds of specific aquatic organisms include the sounds of the same species of fish feeding, courting, and gathering, as well as the sounds of other species of fish hunting and asserting their territory.

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