A sampling device for modernized marine ranching fishery resource investigation

Abstract

The application discloses a sampling device for modernized marine ranching fishery resource investigation, belongs to the technical field of marine resource investigation, and comprises a buoyancy assembly capable of floating on the water surface, a counterweight connected with the buoyancy assembly through a rope body at the bottom of the buoyancy assembly, and at least two groups of sampling assemblies with intervals arranged on the rope body, wherein the sampling assembly comprises a first fishing assembly and a second fishing assembly capable of capturing organisms, and the first fishing assembly and the second fishing assembly are arranged in an upper and lower interval mode. The scheme of the application is suitable for various complex marine habitats of the modernized marine ranching, can collect fishery resource samples of different water layers, the moving range of the sampling coordinates is controllable in value, and the data is representative.

Description

Technical Field

[0001] This invention relates to the field of marine resource survey technology, and more specifically to a sampling device for surveying fishery resources in modern marine ranches. Background Technology

[0002] The accuracy of studies on the abundance and diversity of fishery resources in marine ranches directly depends on the selection of sampling equipment. Different sampling nets vary significantly in their fishing principles, fishing capacity, and sample representativeness. However, due to the relatively complex marine environment of marine ranches, such as artificial reefs and wind turbine foundations on the seabed, and wind turbine modules, cages, and aquaculture rafts on the sea surface, the most widely used fishery resource survey nets are difficult to operate with. Other traditional nets, such as gillnets and traps, have problems such as not being able to cover all water depths in the surveyed area. At the same time, survey nets should also have the advantages of not damaging seabed habitats, such as coral reefs, seaweed beds, and seagrass beds, and being adaptable to various water depths.

[0003] To address this, existing technologies combine sampling floats with trapping devices to trap marine organisms, enabling the observation of fishery resources in marine ranches. For example, the existing technology JP2015067271 provides a solution that can simultaneously trap live fish, fry, and juvenile fish, and offers a high survival rate for the trapped fish. This solution can provide effective data for the observation of fishery resources in marine ranches. However, this device can only trap organisms at a single water depth, and there is still much room for improvement in acquiring biological data. Summary of the Invention

[0004] The purpose of this invention is to provide a sampling device for fishery resource surveys in modern marine ranches. It is applicable to various complex marine habitats in modern marine ranches, collects fishery resource samples from different water layers, and the sampling coordinate movement range is controllable, resulting in representative data.

[0005] To address the aforementioned technical problems, this invention provides the following technical solution: a sampling device for modern marine ranch fishery resource surveys, comprising a buoyancy component capable of floating on water, a counterweight connected to the bottom of the buoyancy component via a rope, and at least two sets of spaced sampling components on the rope. Each sampling component includes a first and a second sampling component capable of capturing organisms, arranged vertically and vertically. The counterweight is used to pinpoint the sampling point, and the rope connection to the buoyancy component ensures the rope is relatively vertical in the water, thus controlling the range of sampling coordinates. This allows for the arrangement of multiple sampling components on the rope, enabling the number of components to be freely combined based on different water depths and aquatic environment information. The spaced arrangement of the first and second sampling components further classifies organisms in the water layer, enabling the collection of fishery resource samples from different water layers. The obtained data is representative and does not damage the marine ranch habitat, facilitating the standardization of marine ranch fishery resource survey results.

[0006] According to one embodiment of the present invention, an image acquisition component connected to a rope is provided above the sampling component. The image acquisition component includes a camera for acquiring images and for acquiring underwater biological image data. Based on such data, the fishery resources of the sampling water area can be analyzed. Of course, the image acquisition component in this case may also include underwater searchlights, attracting lights, and other devices to attract organisms.

[0007] According to one embodiment of the present invention, the second fishing component is a fishing cage with barbels, which can be configured as a double-layered cage, both layers having barbels. The fishing cage can catch organisms at different water layers, achieving the capture of surviving organisms, and, in conjunction with gillnets, increasing the probability of obtaining fishery resource samples and improving data representativeness.

[0008] According to one embodiment of the present invention, the first fishing assembly includes a first mounting rod whose upper and lower ends are respectively connected to a rope. A net frame is connected to the side of the first mounting rod via a second mounting rod, and a gillnet is laid on the net frame. The arrangement of the first and second mounting rods to construct a cross-shaped structure allows for the deployment of four net frames with gillnets, which has a better interception effect on organisms moving at various angles in the water, thereby improving the accuracy of fishery resource sample data.

[0009] According to one embodiment of the present invention, a float plate is connected above the net frame, and at least two floating tubes are spaced apart on the bottom surface of the float plate. An extension plate connected to the bottom surface of the float plate is provided between the floating tubes. The arrangement of the float plate and floating tubes above the net frame increases the buoyancy support of the net frame, making the net frame relatively vertical in the water. As the gillnet on the net frame can capture a certain amount of fish over time, the net frame may tilt or sink. The float plate and floating tubes can correct the horizontal state of the net frame, which is arranged in a cross shape, and solve the problems of reduced capture efficiency due to the gillnet tilting on one side and increased chance of escape of captured fish after the gillnet angle is tilted. In addition, the floating tubes and float plate can increase the frequency of the net frame's small-range up-and-down movement in the water, increase the capture of organisms in the target water layer, and strengthen the fixation of the captured organisms to the gillnet when the frequency of the net frame's up-and-down movement increases.

[0010] According to one embodiment of the present invention, a third float is also connected to the side of the first mounting rod. The third float is a cylindrical structure with its axis parallel to the first mounting rod. At least one end of the third float is fixedly connected to the first mounting rod. The third float is used to correct the attitude of the net frame in the water. The third float is positioned between the net frame and the third rod on the side of the first mounting rod, so that the swaying of the net frame can be absorbed by the third float, which can correct the attitude and reduce the stress response of the organisms captured by the gillnet on the net frame, thus reducing the probability of the organisms escaping.

[0011] According to one embodiment of the present invention, the buoyancy assembly includes a first float capable of holding an object, and at least two second floats connected to the side of the first float via a first rod. The first float has a concave annular groove on its side. The first float is used to hold devices such as a bait box, a temperature, salinity, and depth sensor, a signal transceiver, and a water quality sensor, to achieve real-time feedback of sampling point data. The arrangement of the first and second floats ensures that the rope is relatively vertical in the water, controlling the range of sampling coordinates. The second floats increase the buoyancy support effect of the buoyancy assembly in the water, and the dispersed arrangement of the second floats around the first float helps reduce the excessive floating distance caused by the impact of the entire buoyancy assembly on the water surface. Specifically, this is achieved by dispersing the contact surface and contact points between the water and the buoyancy assembly, thus reducing the time it takes for the water to pass through the buoyancy assembly. The first and second floats are respectively used to pass through the buoyancy components. In this way, the impact of the waves on the first and second floats can be relatively reduced, and the flow can be increased. For example, the flow of weeds and garbage in the water is improved through the buoyancy components, reducing the probability of debris accumulating around the buoyancy components and its impact on biological capture. For example, the accumulation around the buoyancy components will affect the light transmission effect of the water below the buoyancy components. In addition, a ring groove structure is set on the side of the first float to reduce the frequency and height range of the first float's up and down caused by the wave impact, and to prevent the entire buoyancy component from swinging too far on the water surface and pulling on the bottom rope, thus affecting biological collection.

[0012] According to one embodiment of the present invention, an auxiliary component is provided on the first rod body. The auxiliary component has a first connecting sleeve that fits into the first rod body. The bottom end of the first connecting sleeve is connected to a second rod body via a first spring. The axis of the second rod body forms an angle with the axis of the first rod body. A blade is rotatably connected to the end of the second rod body. The blade can rotate under the drive of water, and in conjunction with the second rod body, it drives the relative oscillation of the second rod body as it is pushed down by the water to consume the water flow energy passing through the first and second floats. This reduces the pressure on the first and second floats, and in particular solves the problem of the variable oscillation transmission direction of the signal transceiver component on the first float. The movement of the second rod body can be isolated by the first spring. Furthermore, the relative oscillation of the second rod body can improve the flow of materials between the first and second floats.

[0013] According to one embodiment of the present invention, a fourth float is provided on the rope, and the fourth float is located on the rope between the sampling components. The fourth float is provided to provide an upward pulling force on the rope in the water, so that the rope is in a relatively vertical state in the water, ensuring that each sampling component mounted on the rope is at a set water depth, and solving the problem that excessive tilting of the rope in the water will cause the sampling components to deviate from the set water depth.

[0014] According to one embodiment of the present invention, the rope body and the buoyancy component connection end have at least one set of sampling components, and the rope body and the counterweight connection end have at least one set of sampling components. Sampling components are set at both ends of the rope body to obtain fishery resource samples from the surface and bottom of the water layer of the sampling water area. Based on this, other sampling components are then set on the rope body according to the water depth and the species of organisms in the water area to collect organisms and obtain more accurate fishery resource sample data.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention can fix the sampling point, control the range of sampling coordinates, and freely combine the number of sampling components according to the different water depths and aquatic environment information of the sampling point. The arrangement of the first and second fishing components further classifies the organisms in the water layer, realizes the collection of fishery resource samples from different water layers, and the obtained data is representative and does not damage the habitat of the marine ranch, which is conducive to the standardization of the survey results of marine ranch fishery resources. Attached Figure Description

[0016] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0017] Figure 1This is a schematic diagram of the application scheme of a sampling device for fishery resource survey in modern marine ranching according to the present invention; Figure 2 This is a schematic diagram of the buoyancy component scheme of the present invention; Figure 3 This is a schematic diagram of the auxiliary component solution of the present invention; Figure 4 This is a schematic diagram of the first fishing component scheme of the present invention; Figure 5 This is a top view of the first fishing component scheme of the present invention; Figure 6 This is a schematic diagram of the connection scheme between the floating plate and the space frame of the present invention; Figure 7 This is a schematic diagram of the internal structure of the adjusting component of the present invention; Figure 8 This is a schematic diagram of the fourth floating body scheme of the present invention; Figure 9 This is a schematic diagram of the internal structure of the first column sleeve of the present invention.

[0018] Explanation of reference numerals in the attached drawings: 10. Buoyancy assembly; 11. First float; 12. Second float; 13. Annular groove; 14. First rod; 15. Auxiliary component; 151. First connecting sleeve; 152. First spring; 153. Second rod; 154. Blade; 20. First fishing assembly; 21. First mounting rod; 22. Float; 221. Float tube; 222. Extension plate; 23. Net frame; 24. 25. Gillnet; 26. Third float; 27. Second mounting rod; 28. Adjusting component; 29. ​​Fourth rod; 20. Piston; 21. Telescopic sleeve; 22. Fixed base plate; 23. Rubber sleeve; 30. Second fishing assembly; 41. Fourth float; 42. Float; 43. First column sleeve; 44. Second spring; 45. First opening; 46. Counterweight ring; 57. Extension body; 68. Rope; 79. Image acquisition assembly; 80. Counterweight. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] The concepts involved in this application will first be described with reference to the accompanying drawings. It should be noted that the following descriptions of various concepts are only for the purpose of making the content of this application easier to understand and do not constitute a limitation on the scope of protection of this application; furthermore, the embodiments and features in the embodiments of this application can be combined with each other unless otherwise specified. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] Example 1 like Figures 1-7 As shown, a specific scheme for a sampling device used in modern marine ranching fishery resource surveys according to this embodiment is as follows: The sampling device includes a buoyancy component 10 that floats on the water surface. A counterweight 70 is connected to the bottom of the buoyancy component 10 via a rope 50. At least two sets of sampling components with spacing are mounted on the rope 50. These sampling components include a first harvesting component 20 and a second harvesting component 30 capable of capturing organisms. The first harvesting component 20 and the second harvesting component 30 are arranged vertically and vertically. The counterweight 70 is used to fix the sampling point. The buoyancy component 10 connected to the rope 50 ensures that the rope 50 is relatively vertical in the water, thus controlling the range of the sampling coordinates. This allows for the placement of multiple sets of sampling components on the rope 50. The number of sampling components can be freely combined according to different water depths and aquatic environment information at the sampling points. The spaced arrangement of the first harvesting component 20 and the second harvesting component 30 further classifies organisms in the water layer, enabling the collection of fishery resource samples from different water layers. The obtained data is representative and does not damage the marine ranch habitat, which is beneficial for standardizing the results of marine ranch fishery resource surveys.

[0022] The sampling component is equipped with an image acquisition component 60 connected to the rope 50. The image acquisition component 60 includes a camera for acquiring images and underwater biological image data. Based on this data, the fishery resources of the sampling water area can be analyzed. Of course, the image acquisition component 60 in this case may also include underwater searchlights, attracting lights and other equipment to attract organisms.

[0023] Optionally, a disc structure measuring 30cm × 30cm can be installed at the junction of the rope 50 and the image acquisition component 60, which can conveniently mount multi-functional accessories such as underwater cameras, bait boxes, attractant lights, and temperature, salinity, and depth sensors.

[0024] The second fishing component 30 is a fishing cage with barbed openings. This fishing cage can be configured as a double-layered cage, with both layers having barbed openings. The fishing cage can catch organisms at different water layers, enabling the capture of surviving organisms, and, in conjunction with gillnets, increases the probability of obtaining fishery resource samples and improves data representativeness.

[0025] The cage's dimensions are 50cm × 50cm × 30cm, and its total volume is 0.075m³. 3 The mesh size of the netting is 20mm, and the diameter of the netting is 2mm. There is an entrance on each of the four sides of the cage, front, back, left, and right. The entrance uses a drooping vent design, and the entrance is teardrop-shaped, 10cm wide and 20cm high.

[0026] The first fishing assembly 40 includes a first mounting rod 21 connected to a rope 50 at its upper and lower ends, respectively. A net frame 23 is connected to the side of the first mounting rod 21 via a second mounting rod 26. A gillnet 24 is laid on the net frame 23. The arrangement of the first mounting rod 21 and the second mounting rod 26 constructs a cross-shaped structure, which allows for the deployment of four net frames 23 with gillnets 24. This provides a better interception effect for organisms moving at various angles in the water, thereby improving the accuracy of fishery resource sample data.

[0027] The net frame 23 measures 25 cm × 20 cm, and contains a triple gillnet 24. Combining a fishing trap and a triple gillnet, the captured fishery resource samples are more representative. The fishing principles and capacities of the fishing trap and the triple gillnet differ, resulting in different fishery resource samples and representative data.

[0028] In this embodiment, the sampling device is deployed in a multi-point array in the target water area. The spacing between each sampling device used for modern marine ranch fishery resource survey is more than 200 m, and the sampling time is 6 hours.

[0029] A float plate 22 is connected above the net frame 23. At least two floating tubes 221 are spaced apart on the bottom surface of the float plate 22. An extension plate 222 connected to the bottom surface of the float plate 22 is provided between the floating tubes 221. The float plate 22 and floating tubes 221 above the net frame 23 improve the buoyancy support of the net frame 23, so that the net frame 23 is in a relatively vertical state in the water. As time goes by, the gillnet 24 on the net frame 23 can catch a certain number of fish. Under this situation, the net frame 23 may tilt or sink. The float plate 22 and floating tubes 221 can correct the horizontal state of the net frame 23, which is arranged in a cross shape, and solve the problems of the gillnet 24 tilting to one side, reducing the catching effect, and the increased chance of the caught fish escaping after the angle of the gillnet 24 is tilted. The additional floating pipes 221 and floating plates 22 can increase the frequency of the net frame 23 floating up and down in a small range in the water, increase the capture of organisms in the target water layer, and strengthen the tightness of the captured organisms to the gillnet 24 when the frequency of the net frame 23 floating up and down increases.

[0030] A third float 25 is also connected to the side of the first mounting rod 21. The third float 25 is a cylindrical structure with its axis parallel to the first mounting rod 21. At least one end of the third float 25 is fixedly connected to the first mounting rod 21. The third float 25 is used to correct the attitude of the net frame 23 in the water. The third float 25 is positioned between the net frame 23 and the third rod 21 on the side of the first mounting rod 21. In this way, the swaying of the net frame 23 can be absorbed by the third float 25, which can correct the attitude and reduce the stress response of the organisms captured by the gillnet 24 on the net frame 23, thus reducing the probability of the organisms escaping.

[0031] The buoyancy assembly 10 includes a first float 11 capable of holding objects. At least two second floats 12 are connected to the side of the first float 11 via a first rod 14. The first float 11 has a concave annular groove 13 on its side. The first float 11 is used to hold devices such as a bait box, temperature, salinity, and depth sensor, a signal transceiver, and a water quality sensor to achieve real-time feedback of sampling point data. The arrangement of the first float 11 and second floats 12 ensures that the rope 50 remains relatively vertical in the water, controlling the range of the sampling coordinates. The second floats 12 increase the buoyancy support effect of the buoyancy assembly 10 in the water. Furthermore, the dispersed arrangement of the second floats 12 around the first float 11 helps reduce the excessive floating distance caused by the impact on the water surface of the entire buoyancy assembly 10. Specifically, this is achieved by dispersing the contact surface and contact points between the water and the buoyancy assembly 10, ensuring that the water flowing through the buoyancy assembly 10... The impact of waves on the first float 11 and the second float 12 is relatively reduced and the flow is increased. For example, the flow of weeds and garbage in the water through the buoyancy component 10 is improved, reducing the probability of debris accumulating around the buoyancy component 10 and its impact on biological capture. For example, the accumulation around the buoyancy component 10 will affect the light transmission effect of the water below the buoyancy component 10. In addition, the structure of the annular groove 13 is set on the side of the first float 11 to reduce the frequency and height range of the up and down fluctuation of the first float 11 caused by wave impact, and to avoid the entire buoyancy component 10 swinging too far on the water surface and pulling the bottom rope 50, which will affect the biological collection.

[0032] An auxiliary component 15 is provided on the first rod 14. The auxiliary component 15 has a first connecting sleeve 151 that fits into the first rod 14. The bottom end of the first connecting sleeve 151 is connected to a second rod 153 via a first spring 152. The axis of the second rod 153 forms an angle with the axis of the first rod 14. A blade 154 is rotatably connected to the end of the second rod 153. The blade 154 can rotate under the drive of water, and in conjunction with the second rod 153, it drives the relative oscillation of the second rod 153 as it is pushed down by the water to consume the water flow energy passing through the first float 11 and the second float 12. This reduces the energy loss of the first float 11 and the second float 12, and in particular, solves the problem of the variable transmission direction of the signal transceiver component on the first float 11. The movement of the second rod 153 can be isolated by the first spring 152. Furthermore, the relative oscillation of the second rod 153 can improve the flow of materials between the first float 11 and the second float 12.

[0033] A fourth float 40 is provided on the rope 50, and the fourth float 40 is located on the rope 50 between the sampling components. The fourth float 40 is designed to provide an upward pull on the rope 50 in the water, so that the rope 50 is in a relatively vertical state in the water. This ensures that each sampling component mounted on the rope 50 is at the set water depth, and solves the problem that excessive tilting of the rope 50 in the water will cause the sampling components to deviate from the set water depth.

[0034] The rope 50 has at least one set of sampling components at the connection end with the buoyancy component 40, and the rope 50 has at least one set of sampling components at the connection end with the counterweight 70. Sampling components are set at both ends of the rope 50 to obtain fishery resource samples from the surface and bottom of the water layer in the sampling area. Based on this, other sampling components are then set on the rope 50 according to the water depth and the species of organisms in the water area to collect organisms and obtain more accurate fishery resource sample data.

[0035] Example 2: See appendix Figure 6 Appendix Figure 7As shown, this embodiment is a further improvement on embodiment 1: The upper part of the grid frame 23 has an adjusting member 27 connected to the extension plate 222. The adjusting member 27 includes a rubber sleeve 275 with a columnar cavity structure in the middle. The rubber sleeve 275 contains a piston 272 that can slide along the middle cavity structure. One end of the piston 272 is connected to a fourth rod 271. The rubber sleeve 275 has a through hole allowing the fourth rod 271 to enter and exit. The fourth rod 271 can be connected to the extension plate 222. The rubber sleeve 275 contains a telescopic sleeve 273 that can extend. One end of the telescopic sleeve 273 is connected to the piston 272, and the other end is connected to a fixed base plate 274. The fixed base plate 274 is located outside the rubber sleeve 275 and is fixedly connected to the grid frame 23. The rubber sleeve 275 has a through hole allowing the telescopic sleeve 273 to enter and exit. A sealing ring is provided on the telescopic sleeve 273 between the fixed base plate 274 and the rubber sleeve 275 to prevent external media from entering the rubber sleeve 275. As the number of organisms caught by the gillnet 24 increases, the organisms on the gillnet 24 may struggle, causing the frame 23 to sway, which will affect the stability of the overall cross-shaped frame in the water. The adjustable component 27 can absorb the vibration of individual frames 23 and the local transmission. Specifically, the piston 272 slides relative to drive the deformation of the telescopic sleeve 273 to consume the energy of the frame 23 swaying caused by the struggle of the organisms. In addition, after the organisms on the gillnet 24 are caught, the weight of the first fishing component 20 increases. At this time, the lowered frame 23 is stretched by the gravity telescopic sleeve 273. During the stretching process, the water in the rubber sleeve 275 is discharged, increasing the volume of the telescopic sleeve 273 and relatively increasing the buoyancy of the adjustable component 27. In this way, the buoyancy of the upper part of the individual frame 23 is automatically adjusted according to the caught fish, maintaining the stability of the overall cross-shaped structure of the first fishing component 20 in the water.

[0036] Example 3: See appendix Figure 1 Appendix Figure 8 Appendix Figure 9 As shown, this embodiment is a further improvement on embodiment 1: a fourth float 40 is provided on the rope 50. The fourth float 40 is located on the rope 50 between the sampling components. The fourth float 40 includes a float 41 with buoyancy. A first column sleeve 42 is connected to one side of the float 41. An extension 43 connected to the rope 50 is provided on the outside of the first column sleeve 42. A through hole for the rope to pass through is provided on the extension 43.

[0037] The first sleeve 42 has a first opening 422 on the side away from the end connected to the fourth float 40. The first opening 422 can accommodate the annular counterweight ring 423 to pass through and enter the interior of the first sleeve 42. The interior of the first sleeve 42 has a second spring 421 that contacts the counterweight ring 423.

[0038] The fourth float 40 is used to provide an upward pull on the rope 50 in the water. Specifically, the buoyancy is provided by the float 41. When it is necessary to control the buoyancy of the float 41 at different water depths, the buoyancy of the float 41 can be controlled by adding or removing the counterweight ring 423. This makes the rope 50 relatively vertical in the water, ensuring that each sampling component equipped on the rope 50 is at the set water depth. This solves the problem that excessive tilting of the rope 50 in the water will cause the sampling components to deviate from the set water depth.

[0039] The further provision of the second spring 421 can effectively ensure the tightness of the counterweight ring 423 relative to the first sleeve 42, and the provision of the first opening 422 and the counterweight ring 423 can block the first opening 422 on the side of the first sleeve 42 to prevent organisms from entering and to prevent the possibility of damaging the connection between the first sleeve 42 and the float 41.

[0040] The embodiments and / or implementation methods described above are merely preferred embodiments and / or implementation methods for implementing the technology of the present invention, and are not intended to limit the implementation methods of the technology of the present invention in any way. Any person skilled in the art can make some modifications or alterations to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the present invention, but they should still be regarded as the technology or embodiments that are substantially the same as the present invention. This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. The above descriptions are only preferred embodiments of this application. It should be noted that due to the limitations of written expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this application.

Claims

1. A sampling device for modernized marine ranching fishery resources survey, comprising a buoyant assembly (10) capable of floating on water, the bottom of the buoyant assembly (10) being connected with a counterweight (70) through a rope (50), characterized in that: At least two sets of sampling components with spacing are provided on the rope (50). The sampling components include a first fishing component (20) and a second fishing component (30) capable of capturing organisms. The first fishing component (20) and the second fishing component (30) are arranged vertically and horizontally at intervals. The first fishing assembly (20) includes a first mounting rod (21) whose upper and lower ends are respectively connected to a rope (50). A net frame (23) is connected to the side of the first mounting rod (21) through a second mounting rod (26). A barbed wire (24) is provided on the net frame (23). A floating plate (22) is connected above the grid frame (23). At least two floating tubes (221) are spaced apart on the bottom surface of the floating plate (22). An extension plate (222) connected to the bottom surface of the floating plate (22) is provided between the floating tubes (221). The first mounting rod (21) is also connected to a third float (25) on its side; The space frame (23) has an adjustment member (27) connected to the extension plate (222) above it. The adjustment member (27) includes a rubber sleeve (275) with a columnar cavity structure in the middle. The rubber sleeve (275) is provided with a piston (272) that can slide along the middle cavity structure. One end of the piston (272) is connected to a fourth rod (271), which can be connected to the extension plate (222). The rubber sleeve (275) is provided with a telescopic sleeve (273) that can be extended. One end of the telescopic sleeve (273) is connected to the piston (272), and the other end is connected to the fixed base plate (274). The fixed base plate (274) is located outside the rubber sleeve (275) and is fixedly connected to the space frame (23). The rubber sleeve (275) has a through hole that allows the telescopic sleeve (273) to enter and exit. A sealing ring is provided on the telescopic sleeve (273) between the fixed base plate (274) and the rubber sleeve (275). The second fishing assembly (30) is a fishing cage with a barbel opening; The buoyancy assembly (10) includes a first float (11) capable of placing an object, and at least two second floats (12) are connected to the side of the first float (11) via a first rod (14). The side of the first float (11) is provided with a concave annular groove (13). The first rod (14) is provided with an auxiliary component (15), the auxiliary component (15) has a first connecting sleeve (151) that is sleeved with the first rod (14), the bottom end of the first connecting sleeve (151) is connected to a second rod (153) through a first spring (152), the axis of the second rod (153) is at an angle to the axis of the first rod (14), and a blade (154) is rotatably connected to the end of the second rod (153). The third float (25) is a cylindrical structure with its axis parallel to the first mounting rod (21). At least one end of the third float (25) is fixedly connected to the first mounting rod (21).

2. The sampling device for modernized marine ranching fishery resources investigation according to claim 1, characterized in that: The sampling component is provided with an image acquisition component (60) connected to the rope (50) above it. The image acquisition component (60) includes a camera for acquiring images.

3. The sampling device for fishery resource surveys in modern marine ranches according to claim 1, characterized in that: A fourth float (40) is provided on the rope (50), and the fourth float (40) is located on the rope (50) between the sampling components.

4. A sampling device for fishery resource surveys in modern marine ranches according to claim 1, characterized in that: The rope (50) has at least one set of sampling components at the connection end with the buoyancy component (10); the rope (50) has at least one set of sampling components at the connection end with the counterweight (70).

Images