A fishing tool and method suitable for fish harvesting in an aquaculture system

Abstract

The application relates to a fishing tool and fishing method suitable for fish catching in an aquaculture system, and belongs to the technical field of aquaculture. The fishing tool comprises a mesh body, the mesh body comprises a bottom net, a side net and a cylindrical stone cage composed of dense meshes, a sinker mounting section, a float mounting section and two support rod mounting sections are arranged in the stone cage, and a sinker, a float and a support rod are respectively arranged in the sinker mounting section, the float mounting section and the support rod mounting section. The fishing tool has the beneficial effect that the support rod mounting section is provided with a support rod, the support rod is used for pressing the sinker to the anti-escape net at the bottom of the aquaculture barrel and is used for moving close to the inner wall of the aquaculture barrel, so that the sinker mounting section moves along the anti-escape net at the bottom of the aquaculture barrel, sweeps the anti-escape net at the bottom of the aquaculture barrel, and then surrounds the fish in the aquaculture barrel. The fishing tool has the advantages of simple structure and suitability for fish catching in the aquaculture system. The fishing method can quickly fish all the fish in the aquaculture system by using the fishing tool, and improves the fish catching efficiency in the aquaculture system.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of aquaculture technology, and in particular to a fishing tool and method suitable for fish catching in an aquaculture system. BACKGROUND

[0002] In view of the problems of excessive accumulation of aquaculture waste, serious over-standard of toxic nitrogen in water body, and low efficiency and benefit in traditional ponds, relevant colleges and universities innovatively proposed a green and efficient aquaculture mode based on the concept of "real-time cleaning". In this mode, the cultured objects are kept in a culture barrel, and the solid waste such as leftover feed and feces is collected by a conical collector at the lower part of the culture barrel with high efficiency, and then pumped into a tail water separation tower by a suction pump. The solid waste is separated and collected, and then recycled as a resource. The tail water after removal of solid waste is treated by a constructed wetland for denitrification and phosphorus removal, and then returned to the pond for reuse.

[0003] The culture mode has the advantages of efficient collection and purification of aquaculture waste, safer and better quality of cultured products, more convenient production management, and higher efficiency of aquaculture production, and achieves "zero" discharge of aquaculture tail water. It is an ecological, environmentally friendly, safe and efficient new green aquaculture mode. It has been widely applied in 17 provinces, municipalities and autonomous regions in China.

[0004] However, there is currently a lack of special culture fishing tools and methods. The cultured objects in the culture barrel are usually caught by traditional pond fishing nets. Since the water depth in the culture barrel is generally greater than 1.8 m, and a net escape prevention plate is provided at the bottom, the use of ordinary nets for catching has the problems of low catching efficiency, difficult operation process, and easy damage to the net escape prevention plate in the culture barrel. The successful culture of fish makes it difficult to catch and market, which seriously affects the culture production and the promotion and application of the culture mode. Therefore, it is urgent to develop a fishing tool that can specifically catch the cultured fish in the culture barrel, and to develop a special fishing method to achieve safe and efficient catching. SUMMARY

[0005] Therefore, in order to facilitate the fishing of fish in the culture system and improve the fishing efficiency of cultured fish in the culture system, the present application provides a fishing tool (fishing net device) suitable for fish catching in an aquaculture system, which is used for catching fish in a culture barrel. The fishing tool comprises a net body, the net body comprises a bottom net and a side net, and the side net is connected to the edge of the bottom net to form an open barrel-shaped net structure.

[0006] A sink mounting section, a float mounting section and two support rod mounting sections are provided around the open edge of the net body, the two support rod mounting sections are located between the sink mounting section and the float mounting section, the sink mounting section and the float mounting section are separated from each other, and a sink, a float and a support rod are respectively arranged in the sink mounting section, the float mounting section and the support rod mounting section.

[0007] The float mounting section makes the float mounting section float on the water surface, and the support rod is used to move along the inner wall of the enclosure barrel so as to move the sinker mounting section along the bottom of the enclosure barrel and sweep across the bottom of the enclosure barrel, thereby enclosing the fish in the enclosure barrel.

[0008] Further, the mesh body is provided with a stone cage at the open end, and the sinker, the float and the support rod are located in the stone cage.

[0009] Further, the bottom net and the side net are made of polyethylene or nylon material.

[0010] Further, the sinker is made of galvanized iron chain or lead sinker.

[0011] Further, the length of the sinker mounting section is greater than the diameter of the enclosure barrel.

[0012] Further, the length of the support rod is greater than the length of the support rod mounting section, so that the end of the support rod is exposed to the support rod mounting section, and the part of the support rod exposed to the support rod mounting section is away from the sinker mounting section.

[0013] Further, the length of the support rod is greater than the height of the enclosure barrel.

[0014] The present application also provides a fishing method suitable for fish catching in the aquatic enclosure system, which uses the fishing tool described above, and the fishing method comprises the following steps:

[0015] S1: netting: the fishing tool is put into the enclosure barrel, and the two support rods are inserted into the water body of the enclosure barrel along the wall of the enclosure barrel, and the lower end of the support rod is in contact with the anti-escape net of the bottom of the enclosure barrel, so that the sinker mounting section is close to the anti-escape net;

[0016] S2: surrounding catching: moving at least one support rod along the inner wall of the enclosure barrel, so that the two support rods are relatively displaced, until the two support rods are moved relatively for one circle and then are close to each other again, so that the sinker mounting section sweeps across the entire bottom of the enclosure barrel and is close to the anti-escape net;

[0017] S3: lifting: the two close support rods are rotated and wound for several turns, so that the sinker mounting section is closed as a whole; the two support rods and the entire sinker mounting section are lifted out of the water surface, and the float mounting section is unfolded outward to form a barrel-shaped surrounding circle, and the fishing objects enter the entire fishing tool.

[0018] Further, in the step S2, the process of relatively moving the support rods is that one support rod is kept unchanged, and the other support rod is moved along the wall of the enclosure barrel for one circle.

[0019] Further, in the process of lifting in the step S3, the float mounting section is unfolded outward to form a barrel-shaped surrounding circle.

[0020] The beneficial effects of this invention, a fishing gear and method suitable for catching fish in aquaculture systems, are as follows: The net body of the fishing gear is an open-mouthed, barrel-shaped net structure. At the open end, there are sinker mounting sections, float mounting sections, and two support rod mounting sections arranged along the open end of the net body. The support rod mounting sections contain support rods that move against the inner wall of the enclosure, thereby causing the float mounting sections to move along the bottom of the enclosure, sweeping across the escape-prevention net at the bottom of the enclosure, thus encircling the fish inside. This fishing gear has a simple structure, is suitable for catching fish in aquaculture systems, and improves the efficiency of catching farmed fish in aquaculture systems. This fishing method can quickly catch all fish in an aquaculture system using the above-mentioned fishing gear, improving the efficiency of catching farmed fish in aquaculture systems. Attached Figure Description

[0021] Fig. 1 This is a front view of a fishing gear suitable for catching fish in an aquaculture system according to an embodiment of the present invention;

[0022] Fig. 2 This is a top view of a fishing gear suitable for catching fish in an aquaculture system according to an embodiment of the present invention;

[0023] Fig. 3 This is a schematic diagram of a fishing gear suitable for catching fish in an aquaculture system according to an embodiment of the present invention.

[0024] In the diagram: 1-mesh body, 11-side mesh, 12-bottom mesh, 2-gabion, 21-sinker installation section, 22-support rod installation section, 23-buoy installation section, 3-sinker, 4-support rod, 5-buoy, 6-enclosure bucket, 61-conical sludge collection device, 62-escape prevention net. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0026] Please refer to Figs. 1 to 3 A fishing gear (i.e., fishing net device) suitable for catching fish in an aquaculture system is disclosed. It is used to catch fish cultured in a rearing tank 6 within the rearing system. The rearing system includes a cylindrical rearing tank 6 and a conical sludge collection device 61 with a conical structure located at the bottom of the rearing tank 6. A bottom net 62 is provided at the bottom of the rearing tank 6. When in use, the rearing tank 6 is located within the pond water, and the cultured fish are kept inside the rearing tank 6, above the escape-proof net 62. The conical sludge collection device 61 can efficiently collect uneaten feed, feces, and other solids, which are then pumped into a tailwater separation tower by a sludge pump. After sedimentation, separation, and collection, the solid waste is recycled. The tailwater from which solid waste is removed is denitrified and dephosphorized by an artificial wetland before being returned to the pond for reuse.

[0027] The fishing gear includes a net body 1, which comprises a bottom net 12 and side nets 11. The side nets 11 are connected to the edge of the bottom net 12 to form an open, barrel-shaped net structure (pouch-like structure), i.e., the net body 1. In this embodiment, both the bottom net 12 and the side nets 11 are made of polyethylene or nylon. The mesh size of the net body 1 is determined according to the size of the target fish, and a mesh size of 1 cm is generally recommended.

[0028] The open portion of the mesh body 1 is equipped with a gabion, which is a flexible cylindrical mesh made of dense mesh (mesh fabric with very small mesh size). It is connected to the open portion of the mesh body 1, and the gabions are connected end to end to form a ring structure. The gabion includes a sinker installation section 21, a float installation section 23, and two support rod installation sections 22. The sinker installation section 21, the float installation section 23, and the support rod installation section 22 are respectively equipped with sinkers, floats 5, and support rods 4.

[0029] Both support rod installation sections 22 are located between the sinker installation section 21 and the float installation section 23, separating the sinker installation section 21 and the float installation section 23 from each other. The length of the support rod 4 is longer than the length of the support rod installation section 22 in which it is located, so that the end of the support rod protrudes from the support rod installation section 22, and the part of the support rod 4 protruding from the support rod installation section 22 is far away from the sinker installation section 21. In use, the float 5 makes the float installation section 23 float on the water surface, and the lower end of the support rod 4 extends down along the inner wall of the enclosure 6 to the bottom of the enclosure 6 (i.e., in contact with the escape-proof net 62). The support rod 4 moves against the inner wall of the enclosure 6, so that the sinker installation section 21 moves along the bottom of the enclosure 6, sweeping across the escape-proof net 62 at the bottom of the enclosure 6, thereby surrounding the fish in the enclosure 6. The float installation section 23 floats on the water surface to prevent the fish from escaping from the water surface to the outside of the net body 1.

[0030] Preferably, the length of the support rod 4 is greater than the height of the enclosure tank 6, so that the upper end of the support rod 4 can protrude outside the enclosure tank 6, making it convenient for fishing personnel to move the support rod 4. The support rod 4 can be made of materials such as galvanized steel pipe, wood or bamboo pole.

[0031] Preferably, the sinker 3 is an arc-shaped block made of galvanized iron chain or lead weight, which fills the sinker installation section. The sinker installation section 3 has a closed structure, which can prevent the sinker 3 from scratching the holding tank 6 and the escape-proof net 61 during the capture process. The length of the sinker installation section is greater than the diameter of the holding tank 6, which ensures that the sinker installation section 21 can sweep over the bottom of the holding tank 6.

[0032] Preferably, the float 5 is a spherical or spindle-shaped float, and the float 5 is installed in the float installation section 23 of the gabion; in this embodiment, one float with a buoyancy of 150g is installed every half meter.

[0033] This invention also provides a fishing method (i.e., a fish catching method), which uses the aforementioned fishing gear suitable for catching fish in aquaculture systems, and includes the following steps:

[0034] S1: Netting: Place the fishing gear into the holding tank 6, and make the two support rods 4 close together and vertically insert them into the water in the holding tank 6 along the wall of the holding tank 6. The lower end of the support rods 4 contacts the escape-proof net at the bottom of the holding tank 6, so that the sinker installation section is close to the escape-proof net 62.

[0035] S2: Encirclement: Move at least one support rod 4 along the inner wall of the enclosure 6 to make the two support rods 4 move relative to each other until the two support rods 4 move relative to each other for one full turn and then come together again, so that the sinker installation section 21 is close to the escape prevention net 62 and sweeps across the entire bottom of the enclosure 6.

[0036] S3: Lifting and Retrieving: Rotate and wind the two support rods 4 together to close the sinker installation section 21 as a whole (i.e., the installation section 21 is closed end to end). This will surround all the fish in the enclosure 6 within the net body 1. Lift the entire support rod installation section 22 and sinker installation section 21. At the same time, during the above process, unfold the float installation section 23 outward to form a cylindrical net bag for the entire fishing gear. The target fish enters the entire fishing gear, and the fish in the enclosure 6 can be caught.

[0037] Preferably, the process of moving the support rod 4 in step S2 is as follows: keeping one support rod 4 separate, move the other support rod 4 one revolution along the inner wall of the enclosure tank 6.

[0038] The above fishing method is simple to operate and has a high catch rate, with a first-net catch rate of 95% and a three-net catch rate of 100%.

[0039] In this document, the directional terms such as front, back, top, and bottom are defined based on the location of the components in the accompanying drawings and their relative positions to each other, solely for the purpose of clarity and convenience in expressing the technical solution. It should be understood that the use of these directional terms should not limit the scope of protection claimed in this application.

[0040] Where there is no conflict, the above embodiments and features described herein can be combined with each other.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fishing method suitable for catching fish in aquaculture systems, characterized in that: This fishing method uses the following fishing gear, which includes a net body, the net body including a bottom net and side nets, wherein the side nets are connected to the edge of the bottom net to form an open barrel-shaped net structure; The mesh body is provided with a sinker installation section, a float installation section and two support rod installation sections around its open edge. The two support rod installation sections are located between the sinker installation section and the float installation section, so that the sinker installation section and the float installation section are separated from each other. The sinker installation section, the float installation section and the support rod installation section are respectively provided with sinker, float and support rod. The mesh body has a gabion at its opening, and the sinker, float and support rod are all located inside the gabion. The float installation section is made to float on the water surface, and the support rod is used to move against the inner wall of the enclosure, so that the sinker installation section moves along the bottom of the enclosure, sweeps across the bottom of the enclosure, and thus surrounds the fish in the enclosure. The length of the support rod is longer than the length of the support rod installation section to which it is located, so that the end of the support rod protrudes from the support rod installation section, and the portion of the support rod protruding from the support rod installation section is far away from the sinker installation section; the length of the support rod is greater than the height of the enclosure tank; This fishing method includes the following steps: S1: Netting: Place the fishing gear into the holding tank, and insert the two support rods together vertically into the water in the holding tank along the wall of the holding tank. The lower end of the support rods contacts the escape-proof net at the bottom of the holding tank, so that the sinker installation section is close to the escape-proof net. S2: Encirclement: Move at least one support rod along the inner wall of the enclosure tank to make the two support rods move relative to each other until the two support rods move relative to each other for one full turn and then come together again, so that the sinker installation section is close to the escape-proof net and sweeps across the entire bottom of the enclosure tank; S3: Lifting and Retrieving: Rotate and wrap the two support rods together several times to close the sinker installation section; lift the two support rods and the entire sinker installation section out of the water, and the target will enter the entire fishing gear.

2. The fishing method for catching fish in aquaculture systems according to claim 1, characterized in that: Both the bottom mesh and the side mesh are made of polyethylene or nylon.

3. The fishing method for catching fish in aquaculture systems according to claim 1, characterized in that: The sinker is made of galvanized iron chain or lead weight.

4. The fishing method for catching fish in aquaculture systems according to claim 1, characterized in that: The length of the sinker installation section is greater than the diameter of the enclosure tank.

5. A fishing method for catching fish in an aquaculture system according to claim 1, characterized in that: The process of moving the support rod in step S2 is as follows: keep one support rod stationary and move the other support rod one revolution along the wall of the enclosure.

6. The fishing method for catching fish in aquaculture systems according to claim 1, characterized in that: During step S3, the float installation section is extended outward to form a barrel-shaped enclosure.

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