Method of driving fish for capture in large water bodies

Abstract

The application provides a fish catching method for large water surface fish, and relates to the technical field of fishery. The fish catching device is used in cooperation with a purse seine and comprises a live fish transport ship, an inside fish cabin for loading fish, a net, an inside fish passage along the length direction of the net, the whole net being arranged between the live fish transport ship and the purse seine, one end of the net being in communication with the fish cabin, and the other end of the net being detachably fixedly connected with the purse seine and forming a fish driving space between the net and the purse seine, and an operation auxiliary ship, one being arranged on each side of the net, the operation auxiliary ship being capable of simultaneously compressing the net along the length direction of the net and lifting the height of the bottom of the net along the width direction of the net. In the application, the net is lifted and driven by the operation auxiliary ship, the net is gradually driven to the entrance of the fish cabin, and the mechanical fish driving and gathering are realized, and the efficiency of the large water surface fish catching operation is improved. Moreover, only the operation auxiliary ship needs to be operated, and the mechanical auxiliary operation can be performed, so that the labor intensity is greatly saved and the manpower is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fishery technology, in particular to a fish catching method for large water surface fish. BACKGROUND

[0002] In large water surface fish culture, the comprehensive fishing method of driving, blocking, pricking and netting is a high-efficiency and commonly used fishing technology, which is especially suitable for open waters such as lakes and reservoirs. The main process is to arrange a purse seine on the periphery of the predetermined fishing area to form a closed or semi-closed area to prevent fish from escaping.

[0003] According to the actual movement of fish, the position and shape of the purse seine are adjusted in time, and on the basis of driving and blocking, the net is laid inside the predetermined area to gradually reduce the purse seine enclosure; through continuous driving and blocking, the fish are finally concentrated in the narrow space formed by the net; finally, the fish caught in the net are driven and pulled into the live fish transport ship, and then transported to the shore or temporary net cage for sale.

[0004] The purse seine fish gathering in the whole operation can be realized by mechanical operation of the winch, while the fish gathered by the net is still manually operated due to its high density and complex structure of fishing gear, and each operation requires at least one or two people, and more than thirty people, with high labor intensity and cost. Therefore, mechanical equipment is urgently needed to assist in improving the efficiency of fish catching.

[0005] Therefore, there is room for improvement, and the present application provides a fish catching method for large water surface fish. SUMMARY

[0006] In view of the deficiencies of the prior art, the present application aims to provide a fish catching method for large water surface fish, and the specific scheme is as follows:

[0007] A fish catching method for large water surface fish, the fish catching device is used in cooperation with a purse seine, comprising:

[0008] A live fish transport ship is internally provided with a fish hold for loading fish;

[0009] A net is internally provided with a fish passage along the length direction, and is arranged between the live fish transport ship and the purse seine, with one end communicated with the fish hold and the other end detachably fixed with the purse seine and forming a fish driving space between the purse seine.

[0010] An operation auxiliary ship is arranged on both sides of the net, which can simultaneously compress the net along the length direction and lift the height of the bottom of the net along the width direction.

[0011] Thus, after arranging the net between the purse seine and the live fish transport ship, the caught fish is surrounded in the chasing space by the purse seine, and the fish school is driven into the fish passage of the net by gradually reducing the surrounding ring, and through the setting of the operation auxiliary ship, when the operation auxiliary ship performs the lifting action of the height of the bottom of the net, the fish school at the entrance of the fish passage swims inwards, and when the bottom of the net gradually emerges from the water, the entrance of the fish passage is equivalent to being closed, preventing the fish school from swimming back, and when the operation auxiliary ship performs the forward action of compressing the net along the length direction, the space of the fish passage is reduced, and the fish school can only swim towards the direction close to the fish tank. By analogy, through the control of the displacement of the operation auxiliary ship, the lifting and chasing operations can be repeated, and the fish school in the fish passage is gradually driven into the fish tank, completing the catching and chasing of the fish, and improving the catching efficiency.

[0012] In summary, by setting the net and the operation auxiliary ship, only the operation of the operation auxiliary ship is needed, and the operation auxiliary ship can be used for mechanical auxiliary operation, greatly saving the labor intensity and reducing the labor.

[0013] Further, the bottom of the net is spaced apart from at least two groups of traction assemblies;

[0014] Each group of traction assemblies includes a bottom net force cable and a plurality of traction rope rings, the traction rope rings are linearly arranged on the bottom of the net along the width direction of the net, and the bottom net force cable passes through the traction rope rings in turn, and the two ends of the bottom net force cable extend out of the net for cooperation with the operation auxiliary ship.

[0015] Thus, when the net needs to be lifted, the bottom net force cable is only tightened by the operation auxiliary ship, and with the tightening of the bottom net force cable, the bottom of the net is gradually lifted under the limiting action of the traction rope rings, achieving lifting.

[0016] Further, the net is longitudinally arranged with a lateral force cable on each side along the length direction;

[0017] One end of the lateral force cable is fixed to one end of the net close to the live fish transport ship, and the other end is reserved with a length l for cooperation with the operation auxiliary ship.

[0018] Thus, when the net needs to be chased, the lateral force cable is only tightened by the operation auxiliary ship, and when the lateral force cable is shortened, the length of the entire net is also shortened, and at the same time, the space of the fish passage is reduced.

[0019] Further, the operation auxiliary ship includes a ship body and a roller lifting device provided on the ship body;

[0020] The roller netting device is provided with at least two, one of which is used to be connected with the end of the bottom net force cable, and the other is used to be connected with the end of the lateral force cable away from the live fish transport ship.

[0021] Therefore, by providing the roller netting device, only the end of the bottom net force cable and the lateral force cable needs to be installed on the roller netting device, and when the roller netting device performs the rotating action, the bottom net force cable and the lateral force cable can be reeled in to realize the tightening.

[0022] Further, the roller netting device comprises a netting frame, a roller body and a driving motor.

[0023] The netting frame is installed on the ship body, the driving motor is installed on one side of the netting frame, and the roller body is rotatably installed on the other side of the netting frame.

[0024] The roller body is provided with three, which are distributed in a triangular intersection and are in transmission connection with the driving motor.

[0025] Therefore, when the roller netting device is started, the driving motor provides power to the roller body, and the roller body rotates, so that the bottom net force cable and the lateral force cable can be gradually wound on the surface of the roller body to realize the reeling.

[0026] Further, the roller netting device connected with the lateral force cable is arranged obliquely, wherein the included angle between the central axis of the roller body and the width direction of the net is α.

[0027] Therefore, the roller netting device can exert an obliquely arranged pulling force on the lateral force cable, which can not only realize the contraction along the length direction of the net, but also can ensure that the net is opened outward to avoid compressing the width of the fish passage.

[0028] Further, the net is a grid-shaped net, each traction rope ring is fixed at the intersection of adjacent two grids, and the position of each traction rope ring is fixed.

[0029] After the bottom net force cable is reeled in, the cable rope will be tensioned, the traction rope rings will be close to each other, so that the net is deformed. Therefore, the traction rope ring is arranged at the intersection, which can reduce the possibility of tearing the net and ensure the structural strength of the net. At the same time, the position of the traction rope ring is fixed, which is convenient for the staff to operate the net lifting, falling and determining the height according to the position of the traction rope ring.

[0030] Further, the net is provided with a float assembly longitudinally arranged on both sides along the length direction of the net, and the float assembly is arranged adjacent to the lateral force cable.

[0031] The position of the float assembly away from the live fish transport ship by a safety distance H is provided with a mark point.

[0032] Thus, the upper part of the net can float on the water surface by the buoyancy of the float assembly, and when the operation of the auxiliary ship is reeled in until it is close to the marker point, most of the fish in the net have entered the fish tank, and the operation of the auxiliary ship can be stopped to avoid hitting the live fish transport ship.

[0033] Further, the working method of the fish catching device is as follows:

[0034] The net is arranged in a long strip along the side of the live fish transport ship and is connected with the fish tank of the live fish transport ship, the two sides of the net float on the water surface by the float assembly, the middle part of the net sinks into the water, the lateral force cable of the net is straightened, and the other end of the net is connected with the predetermined area of the purse seine.

[0035] When the fish are surrounded by the purse seine, the fish driving space is gradually reduced, and the fish are driven into the fish passage of the net.

[0036] The two auxiliary ships are arranged on the two sides of the net and are initially parked near the traction rope ring of the purse seine.

[0037] Each bottom net force cable is sequentially threaded through the corresponding traction rope ring until the two ends of the bottom net force cable are exposed, one end of the bottom net force cable near the purse seine is connected to the roller body of the roller net lifting device, and the lateral force cable on the same side of the auxiliary ship is connected to the roller body of the other roller net lifting device.

[0038] When the fish are lifted, the two roller net lifting devices can simultaneously or individually reel in the bottom net force cable until the bottom net force cable at the bottom of the net can be seen, so that part of the net of the net is lifted to achieve lifting, at the same time, the auxiliary ship moves towards the live fish transport ship, the roller net lifting device reeves the lateral force cable to drive the fish to swim forward, after moving a distance, the roller net lifting device removes the previous bottom net force cable and replaces another bottom net force cable to continue the reeving operation, and so on, until the auxiliary ship moves to the vicinity of the marker point, the fish in the entire net are lifted and driven to the fish tank of the live fish transport ship, and the fish catching operation process is completed.

[0039] Compared with the prior art, the beneficial effects of the present application are as follows:

[0040] (1) The present application can be combined with the purse seine or other existing large water surface catching net, and the net can be lifted and chased by the auxiliary ship, the net is gradually surrounded to the entrance of the fish tank, mechanical chasing and catching are realized, and the efficiency of large water surface catching operation is improved.

[0041] (2) The bottom net force cable and the lateral force cable only need to be connected once in advance, the force cable length is reserved, the operation can be repeated multiple times, the cable does not need to be reinstalled, and the operation is quick and simple.

[0042] (3) The device can be flexibly set according to needs, is symmetrically distributed, and has high adjustability and adaptability.

[0043] (4) Since different net lifting operations and net chasing operations need to be performed on the operation auxiliary ship, only 3-4 people are needed on each operation auxiliary ship to assist in mechanical operation, so that labor intensity can be greatly saved and manpower can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 is a schematic diagram of the working principle of the present application;

[0045] Figure 2 is a schematic diagram of the fish catching and chasing device of the present application;

[0046] Figure 3 is a schematic diagram of the arrangement angle of the roller net lifting device;

[0047] Figure 4 is a schematic diagram of the roller net lifting device;

[0048] Figure 5 is a schematic diagram of the structure of the traction assembly at the bottom of the net;

[0049] Figure 6 is a flowchart showing the connection relationship of the encoder, the central control system and the alarm device.

[0050] The drawings show that: 1 is a live fish transport ship; 2 is a net; 3 is an operation auxiliary ship; 4 is a traction assembly; 41 is a bottom net force cable; 42 is a traction rope ring; 5 is a lateral force cable; 6 is a roller net lifting device; 61 is a net lifting frame; 62 is a roller body; 63 is a driving motor; 7 is a float assembly; 8 is a central control system; 9 is an alarm device; 10 is an encoder; and 11 is a purse seine. DETAILED DESCRIPTION

[0051] The present application will be further described in detail below in combination with embodiments and drawings, but the embodiments of the present application are not limited thereto.

[0052] A large water surface fish catching and chasing method, and a fish catching and chasing device are used in cooperation with a large water surface catching net to realize mechanized fish chasing and catching, and improve the efficiency of large water surface catching operations.

[0053] It should be noted that the large water surface catching net is not limited, and the present embodiment is exemplified by a purse seine 11, such as Figure 1The purse net 11 is arranged to form a closed or semi-closed area, and in this embodiment, the purse net 11 is semi-closed with an opening reserved between the two ends.

[0054] Specifically, as Figure 1 The fish catching device comprises a live fish transport ship 1, a net 2, and an operation auxiliary ship 3, wherein:

[0055] The live fish transport ship 1 can adopt the prior art without limitation, and is internally provided with a fish cabin for loading fish. When the fish cabin is not used, the fish cabin can be closed by using a movable baffle. When the fish cabin needs to be used, the movable baffle can be removed.

[0056] The net 2 can be made of the existing netting and has a long strip shape with open ends. An internal fish passing channel is arranged along the length direction of the net 2, and the cross section of the fish passing channel can be circular, square, elliptical, etc. without limitation.

[0057] The net 2 is arranged between the live fish transport ship 1 and the purse net 11, and one end of the net 2 is in communication with the fish cabin, and the other end is detachably and fixedly connected to the two ends of the purse net 11 at the opening of the purse net 11, so as to close the purse net 11 and form a fish chasing space between the net 2 and the purse net 11. It should be noted that the connection between the net 2 and the purse net 11 can be realized by fixing by using movable rope knots, etc.

[0058] The operation auxiliary ship 3 is arranged on both sides of the net 2, and can simultaneously compress the net 2 along the length direction of the net 2 and lift the height of the bottom of the net 2 along the width direction of the net 2. When the operation auxiliary ship 3 lifts the height of the bottom of the net 2, the bottom of the net 2 gradually approaches the water surface, which is equivalent to the net lifting operation of the net 2. When the operation auxiliary ship 3 compresses the net 2 along the length direction, it is equivalent to the net chasing operation of the net 2.

[0059] In combination with Figure 2 and Figure 4 In order to realize the net lifting operation, at least two groups of traction assemblies 4 are arranged at the bottom of the net 2, such as four groups. The distance between each group of traction assemblies 4 is not limited. Each group of traction assemblies 4 comprises a bottom net force cable 41 and a plurality of traction rope rings 42. The traction rope rings 42 are linearly arranged at the bottom of the net 2 along the width direction of the net 2. The bottom net force cable 41 passes through the traction rope rings 42 in sequence, and the two ends of the bottom net force cable 41 extend out of the net 2 for cooperation with the operation auxiliary ship 3. The end of the bottom net force cable 41 can be fixed with a float for quick positioning of the end of the bottom net force cable 41.

[0060] At the entrance of the fish pass, when the auxiliary work boat 3 performs the net lifting operation on the net 2, only the auxiliary work boat 3 tightens the bottom net force cable 41 by pulling the end of the bottom net force cable 41. With the tightening of the bottom net force cable 41, the height of the net 2 at the bottom can be lifted under the limiting action of the traction rope ring 42. As the bottom of the net 2 gradually approaches the water surface, the fish group at the entrance of the fish pass will swim inward. When the bottom of the net 2 gradually emerges from the water, the entrance of the fish pass is equivalent to being closed, preventing the fish from returning.

[0061] As Figure 2 , the optimized net 2 is a grid-shaped net, and each traction rope ring 42 is fixed at the intersection of adjacent two grids. After the bottom net force cable 41 is wound, the cable rope is tensioned, and the traction rope rings 42 are close to each other, so that the net 2 is deformed. Therefore, the traction rope ring 42 arranged at the intersection can reduce the possibility of tearing the net and ensure the structural strength of the net 2. The position of each traction rope ring 42 is fixed, and a mark can be used to distinguish the position, so that the staff can operate the net 2 lifting, falling and determine the height according to the position of the traction rope ring 42.

[0062] As Figure 2 , in order to realize the aforementioned net driving operation, a lateral force cable 5 is arranged on each side of the net 2 in the length direction. One end of the lateral force cable 5 is fixed to one end of the net 2 close to the live fish transport boat 1, and the other end is reserved with a length l for cooperation with the auxiliary work boat 3. The end of the lateral force cable 5 can also be provided with a float.

[0063] When the net 2 needs to be driven, the auxiliary work boat 3 only needs to tighten the lateral force cable 5. When the lateral force cable 5 is shortened, the length of the entire net 2 will also be shortened, and at the same time, the space of the fish pass will be reduced, so that the fish group can only swim in the direction close to the fish tank, so that the fish group in the fish pass is increased in density, and the fish group is driven to swim into the fish tank.

[0064] The aforementioned net lifting operation and net driving operation are realized by the staff relying on the mechanized operation of the auxiliary work boat 3. Specifically, the auxiliary work boat 3 includes a hull and a roller net lifting device 6 arranged on the hull. The staff is in the hull and specifically performs the mechanized operation by operating the roller net lifting device 6.

[0065] Since there is a lateral force cable 5 and a plurality of bottom net force cables 41 on the same side of the net 2, correspondingly, the roller net lifting device 6 is provided with at least two, one of which is used to connect with the end of the bottom net force cable 41 for winding the bottom net force cable 41, and the other is used to connect with the end of the lateral force cable 5 away from the live fish transport boat 1 for winding the lateral force cable 5.

[0066] It should be noted that although the number of bottom net force beams 41 is multiple, the bottom net force beams 41 that are hauled in will not work when the fish swim close to the fish tank, so only one roller hauling device 6 is needed to cooperate with different bottom net force beams 41 along the length direction of the net 2, and too many roller hauling devices 6 do not need to be set.

[0067] Specifically, in combination with Figure 4 and Figure 5 , the roller hauling device 6 includes a hauling frame 61, a roller body 62, and a driving motor 63. The hauling frame 61 is installed on the ship body, the driving motor 63 is installed on one side of the hauling frame 61, and the roller body 62 is rotatably installed on the other side of the hauling frame 61. The roller body 62 is provided with three, which are distributed in a triangular intersection, and can be drivingly connected with the driving motor 63 by setting a chain wheel or a belt wheel. When hauling and chasing the net, only the end of the bottom net force beam 41 and the lateral force beam 5 needs to be installed on the roller hauling device 6, and the roller body 62 is rotated by the driving motor 63 to provide power, so that the bottom net force beam 41 and the lateral force beam 5 can be gradually wound on the surface of the roller body 62, and the hauling is realized.

[0068] It should be noted that the roller hauling device 6 connected with the lateral force beam 5 is arranged obliquely, wherein the included angle between the central axis of the roller body 62 and the width direction of the net 2 is α, as shown in Figure 3 It can be seen that the included angle is about 60°, so that the roller hauling device 6 can exert an obliquely arranged tension on the lateral force beam 5, which can not only realize the contraction along the length direction of the net 2, but also ensure that the net 2 is opened outward to avoid compressing the width of the fish passage.

[0069] In order to ensure that the net 2 can be fully expanded, the net 2 is longitudinally arranged with a float assembly 7 on both sides along the length direction, as shown in Figure 2 The float assembly 7 is arranged adjacent to the lateral force beam 5, and the float assembly 7 is specifically a rope body connected with a plurality of spaced floats. The spacing of the floats is not limited. It should be noted that the spacing between two adjacent floats on the float assembly 7 is larger near the end of the lateral force beam 5. Thus, the upper part of the net 2 can float on the water surface by the buoyancy of the float assembly 7, and the bottom of the net 2 is submerged in water by gravity.

[0070] In addition, since the floater assembly 7 is always floating on the water surface, a mark point is arranged at a position where the floater assembly 7 is at a safe distance H from the live fish transport ship 1, the mark point can be realized by a luminous mark, and the value of the safe distance H can be set to be less than the distance between the live fish transport ship 1 and the traction assembly 4 closest to the live fish transport ship 1. With the progress of the netting operation, when the auxiliary operation ship 3 retracts the lateral force cable 5 until the mark point, most of the fish in the net 2 at this time have entered the fish hold, and the netting operation can be stopped to avoid the collision between the auxiliary operation ship 3 and the live fish transport ship 1.

[0071] Similarly, although the staff can determine whether to stop the retraction of the bottom net force cable 41 by observing the position of the traction rope ring 42 and whether the bottom of the net 2 is exposed to the water surface, there may be a safety hazard. In order to more directly and safely realize the stop of the retraction of the bottom net force cable 41, since the live fish transport ship 1 generally has a central control system 8, Figure 6 , the two ship bodies are each provided with an alarm device 9 connected to the central control system 8, the alarm device 9 can be a buzzer, and one of the roller bodies 62 in each roller net lifting device 6 is internally provided with an encoder 10 for collecting the rotation degrees of the roller body 62, and the encoder 10 is connected to the central control system 8 and feeds back the collected data to the central control system 8.

[0072] The central control system 8 is provided with a preset length value L corresponding to each of the two roller net lifting devices 6, which is set by the staff according to experience. Since each bottom net force cable 41 can be retracted by the roller net lifting device 6 alone or simultaneously, when each encoder 10 calculates that the length of the bottom net force cable 41 wound on the roller body 62 exceeds the preset length value L or the sum of the lengths calculated by the two encoders 10 exceeds 2L, the alarm device 9 gives an alarm, and the staff can stop the operation of the driving motor 63 after hearing the alarm.

[0073] In summary, in the fish catching and driving device of the present application, after the net 2 is arranged between the purse seine 11 and the live fish transport ship 1, the caught fish are surrounded in the fish driving space through the purse seine 11, the fish are driven into the fish passage of the net 2 through the gradually reduced surrounding circle, the displacement of the auxiliary operation ship 3 is controlled to repeatedly perform the net lifting and netting operation, the fish in the fish passage are gradually driven into the fish hold, the fish catching and driving is completed, and the catching efficiency is improved.

[0074] In addition, according to the fish catching and driving device described above, the present application further discloses a working method of the fish catching and driving device, which is as follows:

[0075] The net 2 is arranged in a long strip along one side of the live fish transport ship 1 and communicates with the fish hold of the live fish transport ship 1, the net 2 is floated on the water surface by the float assembly 7 on both sides of the net 2, the middle part of the net 2 is sunk underwater, the lateral force cable 5 on the net 2 is pulled straight, and the other end of the net 2 is connected with a predetermined area of the purse seine 11;

[0076] When the fish is surrounded by the purse seine 11, the fish driving space is gradually reduced, and the fish is driven into the fish passage of the net 2;

[0077] The two operation auxiliary ships 3 are arranged on both sides of the net 2 and are initially parked near the traction rope ring 42 of the purse seine 11;

[0078] Each bottom net force cable 41 is sequentially threaded through the corresponding traction rope ring 42 until the two ends of the bottom net force cable 41 are exposed, the end of the bottom net force cable 41 near the purse seine 11 is connected to the roller body 62 of the roller net lifting device 6, and the lateral force cable 5 on the same side of the operation auxiliary ship 3 is connected to the roller body 62 of the other roller net lifting device 6;

[0079] During fishing, the two roller net lifting devices 6 can simultaneously or individually wind up the bottom net force cable 41 until the bottom net force cable 41 at the bottom of the net 2 can be seen, so that part of the net 2 is lifted to achieve lifting, at the same time, the operation auxiliary ship 3 moves towards the live fish transport ship 1, the roller net lifting device 6 winds up the lateral force cable 5 to drive the fish to swim forward, after moving a distance, the roller net lifting device 6 removes the previous bottom net force cable 41 and replaces another bottom net force cable 41 to continue the winding operation, and so on, until the operation auxiliary ship 3 moves to the vicinity of the marked point, the fish in the entire net 2 is lifted and driven to the fish hold of the live fish transport ship 1, and the fishing and fish driving process is completed.

[0080] The above is only a preferred embodiment of the present application, and the protection scope of the present application is not limited to the above embodiment, and any technical solution falling within the concept of the present application is within the protection scope of the present application. It should be noted that, for ordinary skilled persons in the art, some improvements and refinements without departing from the principles of the present application are also considered as the protection scope of the present application.

Claims

1. A method for catching and herding fish in large bodies of water, characterized in that, Based on the fish harvesting and driving equipment, the fish harvesting and driving equipment is used in conjunction with the enclosure net (11), including: Live fish transport vessel (1), with a fish hold inside for loading fish; The net (2) has a fish passageway along its length inside. It is set between the live fish transport ship (1) and the seine net (11). One end is connected to the fish hold, and the other end is detachably and fixedly connected to the seine net (11) and forms a fish-driving space between the seine net (11). The operation assistance vessel (3) is set on each side of the net (2), and can simultaneously compress the net (2) along the length direction of the net (2) and raise the bottom of the net (2) along the width direction of the net (2); The bottom of the net (2) is equipped with at least two sets of traction components (4) at intervals; Each traction assembly (4) includes a bottom net frame (41) and several traction rope loops (42). The traction rope loops (42) are arranged linearly along the width direction of the net (2) at the bottom of the net (2). The bottom net frame (41) passes through the traction rope loops (42) in sequence, and the two ends of the bottom net frame (41) extend out of the net (2) for cooperation with the work auxiliary vessel (3). A lateral force line (5) is arranged longitudinally on both sides of the net (2) along its length direction; One end of the lateral force line (5) is fixed to the end of the net (2) near the live fish transport vessel (1), and the other end is reserved with a length l for cooperation with the auxiliary vessel (3); The auxiliary vessel (3) includes a hull and a roller net-lifting device (6) installed on the hull; Two roller net lifting devices (6) are provided. One roller net lifting device (6) is used to connect to the end of the bottom net force line (41), and the other roller net lifting device (6) is used to connect to the end of the lateral force line (5) away from the live fish transport vessel (1). The net (2) is arranged in a long strip along one side of the live fish transport ship (1) and connected to the fish hold of the live fish transport ship (1). The two sides of the net (2) float on the water surface with the float assembly (7), and the middle of the net (2) sinks underwater. The lateral force line (5) on the net (2) is straightened, and the other end of the net (2) is connected to the predetermined area of ​​the seine net (11). After the fish are surrounded by the enclosure net (11), the space for driving the fish is gradually reduced, and the fish are driven into the passage of the net (2). Two auxiliary working boats (3) are positioned on both sides of the net (2), initially moored near the towing rope loop (42) close to the seine net (11); Each bottom net wire (41) is passed through the corresponding traction rope loop (42) in sequence until both ends of the bottom net wire (41) are exposed. One end of the bottom net wire (41) closest to the seine net (11) is connected to the roller body (62) of the roller net lifting device (6), and the lateral wire (5) on the same side of the auxiliary working vessel (3) is connected to the roller body (62) of another roller net lifting device (6). When hauling in the fish, the two roller net hauling devices (6) simultaneously or individually tighten the bottom net wire (41) until the bottom net wire (41) of the net (2) is visible, thereby lifting part of the net (2). At the same time, the auxiliary vessel (3) moves towards the live fish transport vessel (1), and the roller net hauling device (6) tightens the lateral wire (5), driving the fish to swim forward. After moving a certain distance, the roller net hauling device (6) removes the previous bottom net wire (41), replaces it with another bottom net wire (41), and continues to tighten the wire. This process continues until the auxiliary vessel (3) moves to the vicinity of the marked point, thereby lifting and driving the fish in the entire net (2) into the fish hold of the live fish transport vessel (1), completing the fish hauling and driving operation.

2. The method for catching and herding fish in large bodies of water according to claim 1, characterized in that, The roller net lifting device (6) includes a net lifting frame (61), a roller body (62), and a drive motor (63); The net-lifting frame (61) is installed on the hull, the drive motor (63) is installed on one side of the net-lifting frame (61), and the roller body (62) is rotatably installed on the other side of the net-lifting frame (61); The roller body (62) has three rollers arranged in a triangular cross shape and is connected to the drive motor (63) for transmission.

3. The method for catching and herding fish in large bodies of water according to claim 2, characterized in that, The roller net-raising device (6) connected to the lateral force line (5) is arranged at an angle, wherein the angle between the central axis of the roller body (62) and the width direction of the net (2) is set as α.

4. The method for catching and herding fish in large bodies of water according to claim 3, characterized in that, The net (2) is a mesh-like net, and each traction rope loop (42) is fixed at the intersection of two adjacent meshes, and the position of each traction rope loop (42) is fixed.

5. A method for catching and herding fish in large bodies of water according to claim 4, characterized in that, The net (2) has float assemblies (7) arranged longitudinally on both sides along its length direction, and the float assemblies (7) are arranged adjacent to the lateral force line (5); A marker is placed at a safe distance H between the float assembly (7) and the live fish transport vessel (1).

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