Experimental device for observing illumination behavioristics of epinephelus microarus

Abstract

The invention relates to the technical field of biological behavioristics, in particular to an epinephelus micropunctatus illumination behavioristics observation experiment device which comprises a center frame, a plurality of interception barriers used for intercepting epinephelus are arranged on the center frame, and the plurality of interception barriers form a cross-shaped frame used for separating the epinephelus; arc-shaped holes are formed in the sides, close to each other, of the bottoms of the intercepting barriers, and the multiple arc-shaped holes form fish passing holes for groupers to pass through; light source assemblies used for emitting light with different colors and brightness are arranged on the side walls of the interception barriers, the interception barriers comprise elastic wrapping layers, and the wrapping layers are fixedly connected with the center frame; and telescopic assemblies for driving the wrapping layers to extend and contract are arranged in the wrapping layers, so that the wrapping layers can adapt to observation environments with different sizes. Through the design of the wrapping layer, the device can adapt to observation environments of different sizes, fishes do not need to be caught and carried, and the efficiency and convenience of an observation experiment are improved.

Description

Technical Field

[0001] This invention relates to the field of biological behavior technology, specifically to an experimental device for observing the light-induced behavior of fine-spotted grouper. Background Technology

[0002] Grouper is an important high-end economic marine fish species globally, possessing extremely high aquaculture value and market prospects. Among them, the fine-spotted grouper (Epinephelus coioides) has become an important species in the aquaculture industry due to its rapid growth, strong adaptability, and delicious flesh. In intensive aquaculture, light conditions, as a key environmental factor, have a profound impact on the physiological activities, behavioral performance, growth and development, and even reproductive rhythms of fish.

[0003] In existing technologies, when researchers observe the light-induced behavior of grouper, they need to transport the grouper to a specific location or laboratory, and then use different colored lights to lure the grouper. They then analyze the grouper's preference for different light sources, its physiological response to light sources, and its feeding behavior under specific light sources, in order to find the optimal light source conditions that are conducive to the healthy and rapid growth of fine-spotted grouper.

[0004] However, existing observation methods require catching and transporting grouper, which can easily cause mechanical abrasions to the grouper and even cause stress reactions, seriously affecting the observation effect of the experiment and leading to distorted experimental results. Therefore, it is necessary to propose a fine-spot grouper photobehavioral observation experimental device that can reduce the risk of stress and mechanical abrasions to grouper without catching and transporting them. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides an experimental device for observing the light behavior of fine-spotted grouper. A cross-shaped frame is constructed using an intercepting barrier, which disperses the grouper into different lighting environments. An arc-shaped opening allows the grouper to swim freely to different lighting environments based on its natural habits, ensuring the rationality of the observation experiment and improving the reliability of the results.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: a light-induced behavioral observation experimental device for fine-spotted grouper, comprising a central frame, on which are provided a plurality of interception barriers for intercepting grouper, the plurality of interception barriers forming a cross-shaped frame for separating grouper; the bottom of the interception barriers are provided with arc-shaped holes on one side close to each other, the plurality of arc-shaped holes forming a fish passage for grouper to pass through.

[0007] The side walls of the interception barrier are equipped with light source components for emitting light of different colors and brightness. A bracket slides vertically on the top of the central frame, and an image recording component for capturing images of grouper is located on the top of the bracket.

[0008] All the barriers include a flexible wrapping layer, which is fixedly connected to the central frame. The wrapping layer is equipped with a telescopic component to extend and retract, so that the wrapping layer can adapt to environments of different sizes.

[0009] The basic principle of adopting the above scheme is as follows:

[0010] Place the central frame into any circular or square observation environment. The telescopic component extends the covering layer, causing its bottom to fit against the bottom of the observation environment and its outer wall to fit against the side wall. When the covering layer unfolds, it forms a cross-shaped frame, creating several observation chambers of the same area. The arc-shaped holes also unfold to form fish passages, allowing the grouper to move freely within the observation environment. The user can then adjust the color and intensity of the light in each observation chamber using the light source component, while the image recording component records the grouper's behavior.

[0011] The above approach has the following beneficial effects:

[0012] 1. Existing observation methods require catching and transporting grouper, which can easily cause mechanical abrasions to the grouper and even induce stress, seriously affecting the observation effect and leading to distorted experimental results. This solution, through the stretchable design of the wrapping layer, can adapt to observation environments of different sizes, eliminating the need for catching and transporting grouper. This effectively improves the convenience and efficiency of the observation experiment, significantly reduces the risk of stress and mechanical abrasions to the grouper, thus ensuring the feasibility of the observation experiment and improving the reliability of the experimental results.

[0013] 2. This scheme automatically divides the observation environment into several observation chambers of the same area by expanding and contracting the wrapping layer. Furthermore, the design of the fish passage effectively ensures that the grouper can swim freely in each observation chamber according to its own living habits, thus ensuring the reliability of the experimental results and further improving the credibility of the experimental results.

[0014] 3. This scheme can create different lighting environments by adjusting the light color and intensity in each observation room, which makes it easier for researchers to understand the living habits of grouper under different lighting conditions. Each observation room can form a direct and clear contrast, without the need to construct different lighting environments separately or conduct multiple experiments, thus effectively improving the convenience of the experiment and the efficiency of observation.

[0015] Furthermore, a central slot is formed on the central frame, and a central block slides vertically within the central slot. The top of the central block is fixedly connected to the bottom of the support. The telescopic assembly includes a first rod and a second rod respectively hinged to the upper and lower parts of the central frame. A third rod is hinged to the end of the first rod away from the central frame, and a push plate is hinged to the end of the third rod away from the first rod. The sidewalls of the push plates away from the third rods are fixedly connected to the inner sidewalls of the wrapping layer. A fourth rod is hinged to the lower part of the push plate, and the end of the fourth rod away from the push plate is hinged to the end of the second rod away from the central frame. A fifth rod is also hinged to the end of the fourth rod away from the push plate, and the end of the fifth rod away from the fourth rod is hinged to the sidewall of the central block. A sixth rod is also hinged at the hinge point between the first and third rods, and the sixth rod is hinged to the middle of the fourth rod. The second and third rods are arranged parallel to each other, the fifth and sixth rods are arranged parallel to each other, and the first and fourth rods are arranged parallel to each other. A driving assembly for driving the central block to slide vertically along the central slot is provided at the bottom of the central frame.

[0016] Beneficial effects: By controlling the sliding of the central block and the multi-bar transmission, the experimenter only needs to control the sliding of the central block to control the synchronous extension and contraction of several wrapping layers, which improves the convenience of operation and the timeliness of wrapping layer contraction.

[0017] Furthermore, the light source assembly includes a controller and LED lights fixedly connected to the sidewall of the wrapping layer; the LED lights display different colors, and the controller is used to control the operation of the LED lights.

[0018] Beneficial effects: This solution, through the design of LED lights, can quickly construct observation rooms with different lighting environments.

[0019] Furthermore, the image recording component includes a camera fixedly connected to the top of the bracket, and a controller for controlling the operation of the camera to capture images of the grouper.

[0020] Beneficial effects: This solution, through the design of the bracket, allows the height and shooting range of the camera to be increased with the extension distance of the wrapping layer, enabling the camera to capture more comprehensive images and improving the comprehensiveness and accuracy of the observation results.

[0021] Furthermore, the drive assembly includes a sliding cylinder fixedly connected to the bottom of the central frame, with the sidewalls of the wrapping layer all fixedly connected to the outer sidewall of the sliding cylinder; the top of the sliding cylinder communicates with the bottom of the central frame, and an electric control cylinder is fixedly connected to the bottom wall of the inner wall of the sliding cylinder, with a connecting rod fixedly connected to the top of the output shaft of the electric control cylinder, and the connecting rod sliding vertically with the inner sidewall of the sliding cylinder; the top of the connecting rod is fixedly coaxially connected to the central block, and the controller is used to control the operation of the electric control cylinder, thereby driving the central block to slide vertically along the inner wall of the central frame; the sliding cylinder is equipped with an attraction component for attracting grouper.

[0022] Beneficial effects: This solution, through the design of an electronically controlled cylinder, can simultaneously adjust the extension distance of the wrapping layer, the height and shooting range of the camera, and the adjustment of the inducing components, effectively improving the convenience and efficiency of the device adjustment.

[0023] Furthermore, the attractant assembly includes a piston plate fixedly sleeved on the connecting rod, a piston chamber opened inside the sliding cylinder, and a attractant for attracting grouper stored in the piston chamber; the piston plate slides vertically with the inner side wall of the piston chamber; a control valve is connected to the upper side wall of the piston chamber, and the controller is used to control the operation of the control valve, thereby controlling the release of the attractant; a guide assembly for adjusting the release position of the attractant is provided on the outer side wall of the sliding cylinder.

[0024] Beneficial effects: By designing attractants, grouper can be lured to the middle of the observation environment before observation, and then choose to swim to observation rooms with different lighting environments according to their own living habits, thereby improving the reliability of experimental results.

[0025] Furthermore, the guiding component includes a flexible tube, the top of which is connected to the control valve, and the bottom of which is located at the top of the fish passage.

[0026] Beneficial effects: The flexible tube can guide the attractant to the fish hole for release, allowing the grouper to clearly know the location of the fish hole, which facilitates the grouper's free swimming and allows it to choose to swim to the observation room with different lighting conditions according to its own living habits, further improving the reliability of the experimental results.

[0027] Furthermore, one of the wrapping layers, on the side away from the central frame, is detachably connected to a flexible fish-blocking layer, which contains an adjustment component for adjusting its length.

[0028] Beneficial effects: Through the design of the fish-blocking layer, this solution enables the device to adapt not only to square and circular observation environments, but also to rectangular observation environments, thereby improving the adaptability and practicality of the device.

[0029] Furthermore, the adjustment component includes a double-headed cylinder fixedly connected to the inner wall of the fish-blocking layer. The output shafts of both cylinders are fixedly connected to support plates, and the support plates are fixedly connected to the inner wall of the fish-blocking layer. The controller is used to control the operation of the double-headed cylinders, thereby driving the support plates to move.

[0030] Beneficial effects: This solution, through the design of a double-headed cylinder, allows for easy adjustment of the length of the fish-blocking layer, thus adapting to observation environments of different sizes; the support plate design provides support for the fish-blocking layer, ensuring its blocking effect.

[0031] Furthermore, counterweights are fixedly connected to the inner wall of the wrapping layer on the side away from the central frame.

[0032] Beneficial effects: The counterweight can increase the weight of the coating layer, making it better resistant to the impact of fish and water flow, and ensuring that the edge of the coating layer is stably located at the edge of the observation environment, thereby improving the stability of each observation chamber.

[0033] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0034] Figure 1 This is an isometric view of the experimental apparatus for observing the light behavior of fine-spotted grouper according to the present invention.

[0035] Figure 2 This is a cross-sectional view of the fish-blocking layer in the experimental device for observing the light behavior of fine-spotted grouper according to the present invention.

[0036] Figure 3 This is an isometric view of the telescopic component in the light-induced behavior observation experimental device for fine-spotted grouper of the present invention.

[0037] Figure 4 This is a cross-sectional view of the experimental apparatus for observing the light behavior of fine-spotted grouper according to the present invention.

[0038] Figure 5 This is a cross-sectional view of the sliding cylinder in the experimental apparatus for observing the light behavior of fine-spotted grouper of the present invention.

[0039] The reference numerals in the accompanying drawings of the instruction manual include: 1. Central frame; 2. Support; 3. Wrapping layer; 4. Central block; 5. First rod; 6. Second rod; 7. Third rod; 8. Fourth rod; 9. Fifth rod; 10. Sixth rod; 11. LED light; 12. Camera; 13. Sliding cylinder; 14. Electric cylinder; 15. Connecting rod; 16. Piston plate; 17. Control valve; 18. Flexible tube; 19. Fish barrier layer; 20. Double-headed cylinder; 21. Support plate; 22. Counterweight; 23. Push plate. Detailed Implementation

[0040] The following detailed description illustrates the specific implementation method:

[0041] Example 1:

[0042] As attached Figure 1 As shown: A light-induced behavioral observation experimental device for fine-spotted grouper includes a central frame 1, on which several interception barriers are provided for intercepting grouper. The several interception barriers form a cross-shaped frame for separating grouper. Each of the bottom of the interception barriers has an arc-shaped hole on one side close to each other, and the several arc-shaped holes form a fish passage for grouper to pass through.

[0043] The side walls of the interception barrier are equipped with light source components for emitting light of different colors and brightness. The top of the central frame 1 is vertically slidably fitted with a bracket 2, and the top of the bracket 2 is equipped with an image recording component for capturing images of grouper.

[0044] The light source assembly includes a controller and LED lights 11 that are fixedly adhered to the sidewall of the wrapping layer 3; the LED lights 11 display different colors, and the controller is used to control the operation of the LED lights 11.

[0045] The image recording assembly includes a camera 12 bolted to the top of the bracket 2, and a controller for controlling the operation of the camera 12 to record and photograph the grouper.

[0046] Specifically, such as Figure 1 and Figure 2 As shown, the researchers placed an interception barrier in the observation environment (circular or square, with a square shape used in this embodiment). The barrier divided the observation environment into several observation chambers of equal area. The LED lights 11 and camera 12 were then activated by the controller, creating different lighting environments in each observation chamber. The grouper could swim through the fish passage and move to different lighting environments based on its phototaxis. The camera 12 would then photograph and record the swimming of the grouper in each observation chamber. The first 30 minutes were the adaptation period. After the experimental fish had fully adapted to the environment, continuous monitoring was conducted. This experiment involved continuous monitoring for 24 hours. After the recording was completed, the acquired image data was analyzed. During the adaptation period, the number of grouper in each observation chamber was counted every 5 minutes. After the adaptation period, the number of grouper distributed in each observation chamber was counted every 2 hours. This allowed for simultaneous observation of the grouper's images in different lighting environments, achieving an efficient and convenient observation experiment.

[0047] like Figure 3 and Figure 4 As shown, the interception barrier includes an elastic wrapping layer 3 (in this embodiment, an elastic waterproof polyester fiber cloth is used), and the wrapping layer 3 is fixedly bonded to the central frame 1. The wrapping layer 3 is provided with a telescopic component for extending and contracting the wrapping layer 3, so that the wrapping layer 3 can adapt to environments of different sizes.

[0048] A central groove is provided on the central frame 1, and a central block 4 is vertically slidably fitted inside the central groove. The top of the central block 4 is welded to the bottom of the support 2. The telescopic assembly includes a first rod 5 and a second rod 6 respectively hinged to the upper and lower parts of the central frame 1; a third rod 7 is hinged to the end of the first rod 5 away from the central frame 1, and a push plate 23 is hinged to the end of the third rod 7 away from the first rod 5; the side wall of the push plate 23 away from the third rod 7 is fixedly bonded to the inner side wall of the wrapping layer 3; a fourth rod 8 is hinged to the lower part of the push plate 23, and the end of the fourth rod 8 away from the push plate 23 is hinged to the end of the second rod 6 away from the central frame 1; a fifth rod 9 is also hinged to the end of the fourth rod 8 away from the push plate 23, and the end of the fifth rod 9 away from the fourth rod 8 is hinged to the side wall of the central block 4; a sixth rod 10 is also hinged at the hinge point between the first rod 5 and the third rod 7, and the sixth rod 10 is hinged to the middle of the fourth rod 8; the second rod 6 and the third rod 7 are arranged in parallel, the fifth rod 9 and the sixth rod 10 are arranged in parallel, and the first rod 5 and the fourth rod 8 are arranged in parallel.

[0049] like Figure 5 As shown, the bottom of the center frame 1 is provided with a drive assembly for driving the center block 4 to slide vertically along the center groove. The drive assembly includes a sliding cylinder 13 welded to the bottom of the center frame 1, and the side walls of the wrapping layer 3 are all fixedly bonded to the outer side wall of the sliding cylinder 13; the top of the sliding cylinder 13 is connected to the bottom of the center frame 1, and an electric control cylinder 14 (with a maximum output distance of 25cm) is bolted to the bottom wall of the inner wall of the sliding cylinder 13. A connecting rod 15 is bolted to the top of the output shaft of the electric control cylinder 14, and the connecting rod 15 slides vertically with the inner side wall of the sliding cylinder 13; the top of the connecting rod 15 is coaxially bolted to the center block 4, and the controller is used to control the operation of the electric control cylinder 14, thereby driving the center block 4 to slide vertically along the inner wall of the center frame 1.

[0050] Specifically, such as Figure 4 As shown, in the initial state, both the output shaft of the electric control cylinder 14 and the wrapping layer 3 are in a retracted state (the minimum length on one side is about 20cm). At the start of the experiment, the experimenter places the center frame 1 in the observation environment and starts the electric control cylinder 14 through the controller. The output shaft of the electric control cylinder 14 pushes the center block 4 to slide upward. At this time, the end of the fifth rod 9 away from the center frame 1 will move outward. Since the first rod 5 and the second rod 6 are both hinged to the fifth rod 9, the ends of the first rod 5 and the second rod 6 away from the center frame 1 will also move outward. Since the first rod 5 is hinged to the third rod 7, the first rod 5 will push the third rod 7 to move outward, thereby pushing the upper part of the push plate 23 to move outward. At the same time, since the second rod 6 is hinged to the fourth rod 8, the second rod 6 will push the fourth rod 8 to move outward, thereby pushing the lower part of the push plate 23 to move outward, thereby causing the wrapping layer 3 to extend outward (the maximum extension distance on one side is about 100cm), adapting to different environmental sizes (the device diameter can be extended from about 40cm to about 200cm, and the adjustment time is about 40s).

[0051] During this process, since the top of the central block 4 is welded to the bottom of the support 2, when the central block 4 slides up, it will also push the support 2 and the camera 12 to move upward. As the wrapping layer 3 unfolds, the camera 12 will also move upward, so that the shooting range of the camera 12 matches the interception range of the wrapping layer 3, improving the ease of operation of the device and the comprehensiveness of the observation experiment.

[0052] The sliding cylinder 13 is equipped with an attraction component for attracting grouper. The attraction component includes a piston plate 16 fixedly sleeved on the connecting rod 15. A piston chamber is opened inside the sliding cylinder 13, and the piston chamber stores a attractant (glycine is used in this embodiment) for attracting grouper. The piston plate 16 is vertically slidably engaged with the inner side wall of the piston chamber. A control valve 17 is connected to the upper side wall of the piston chamber. The controller is used to control the operation of the control valve 17, thereby controlling the release of the attractant. A guide component is provided on the outer side wall of the sliding cylinder 13 for adjusting the release position of the attractant. The guide component includes a flexible tube 18, the top of which is connected to the control valve 17, and the bottom of which is located at the top of the fish passage hole.

[0053] Specifically, when the output shaft of the electric cylinder 14 extends, the control valve 17 remains open. The output shaft of the electric cylinder 14 will push the piston plate 16 to move upward in the piston chamber. The piston plate 16 will then discharge the attractant in the piston chamber through the control valve 17 and through the flexible tube 18 to the fish passage hole. This allows the grouper to clearly know the location of the fish passage hole before the experiment, making it easier for the grouper to selectively swim freely to the observation room with different lighting environments based on its phototaxis, thus improving the reliability of the experimental results.

[0054] The inner wall of the wrapping layer 3 on the side away from the central frame 1 is fixedly bonded with counterweights 22 (approximately 500g). The counterweights 22 can increase the weight of the wrapping layer 3, making the wrapping layer 3 better resist the impact of fish and water flow, and ensuring that the edge of the wrapping layer 3 is stably located at the edge of the observation environment, thereby improving the structural stability of each observation chamber.

[0055] Existing observation methods require catching and transporting grouper, which can easily cause mechanical abrasions to the grouper and even induce stress, severely affecting the observation results and leading to inaccurate experimental findings. This embodiment, through the stretchable design of the wrapping layer 3, can adapt to observation environments of different sizes, eliminating the need for catching and transporting grouper. This effectively improves the convenience and efficiency of the observation experiment, significantly reduces the risk of stress and mechanical abrasions to the grouper, thereby ensuring the feasibility of the observation experiment and improving the reliability of the experimental results.

[0056] In this embodiment, the observation environment is automatically divided into several observation chambers of the same area (four in this embodiment) by the expansion and contraction of the wrapping layer 3. Furthermore, the design of the fish passage effectively ensures that the grouper can swim freely in each observation chamber according to its own living habits, thus ensuring the reliability of the experimental results and further improving the credibility of the experimental results.

[0057] This embodiment can create different lighting environments by adjusting the light color and intensity in each observation chamber, making it easier for researchers to understand the living habits of grouper under different lighting conditions. The observation chambers can form a direct and clear contrast, eliminating the need to construct different lighting environments separately and to conduct multiple experiments (at least two observation chambers are required; this embodiment has four). This effectively improves the convenience and efficiency of the experiment (adjusting the device diameter from 40cm to 200cm takes only 40 seconds).

[0058] Example 2:

[0059] Unlike the embodiments described above, as Figure 2 As shown, one side of the wrapping layer 3, away from the central frame 1, is detachably fitted with an elastic fish-blocking layer 19 (in this embodiment, an elastic waterproof polyester fiber cloth is used). The fish-blocking layer 19 is equipped with an adjustment assembly for adjusting its length. The adjustment assembly includes a double-headed cylinder 20 bolted to the inner wall of the fish-blocking layer 19. The output shafts of the double-headed cylinder 20 are each bolted to a support plate 21, which is fixedly bonded to the inner wall of the fish-blocking layer 19. A controller is used to control the operation of the double-headed cylinder 20, thereby moving the support plate 21.

[0060] Specifically, such as Figure 2 As shown, this embodiment takes a rectangular observation environment as an example. After the experimenter unfolds the wrapping layer 3, the front, back, and right sides are all in contact with the edge of the observation environment, but the left side is not in contact with the edge of the observation environment. At this time, the experimenter engages the fish-blocking layer 19 with the edge of the left wrapping layer 3. At the same time, the double-headed cylinder 20 is activated by the controller to push the support plate 21 to extend to both sides, thereby causing the fish-blocking layer 19 to extend to both sides, so that the fish-blocking layer 19 is in contact with both sides of the observation environment, adapting to the size of the observation environment and forming a complete observation room.

[0061] In this embodiment, the observation environment is rectangular, and an additional step of installing the fish-blocking layer 19 is added. The initial adaptation period is adjusted to 60 minutes. After the experimental fish have fully adapted to the environment, continuous monitoring is conducted. In this experiment, continuous monitoring lasted for 24 hours. After the recording is completed, the acquired image data is analyzed. During the adaptation period, the number of grouper in each observation room is counted every 5 minutes, and after the adaptation period, the number of grouper distributed in each observation room is counted every 2 hours. This embodiment, through the design of the fish-blocking layer 19, further improves the device's adaptability to the observation environment and enhances the convenience and comprehensiveness of the observation experiments.

[0062] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. An experimental apparatus for observing the photodynamic behavior of fine-spotted grouper, characterized in that, Includes a central frame (1), on which are provided several interception barriers for intercepting grouper, and the several interception barriers form a cross-shaped frame for separating grouper; the bottom of the interception barriers are each opened with an arc-shaped hole on one side close to each other, and the several arc-shaped holes form a fish passage for grouper to pass through. The side walls of the interception barrier are equipped with light source components for emitting light of different colors and brightness. The top of the central frame (1) is vertically slidably fitted with a bracket (2), and the top of the bracket (2) is equipped with an image recording component for capturing images of grouper. All the interception barriers include an elastic wrapping layer (3), and the wrapping layer (3) is fixedly connected to the central frame (1); the wrapping layer (3) is provided with a telescopic component for extending and contracting the wrapping layer (3), so that the wrapping layer (3) can adapt to environments of different sizes.

2. The experimental apparatus for observing the photodynamic behavior of the fine-spotted grouper according to claim 1, characterized in that, A central slot is provided on the central frame (1), and a central block (4) is vertically slidably fitted inside the central slot. The top of the central block (4) is fixedly connected to the bottom of the support (2). The telescopic assembly includes a first rod (5) and a second rod (6) respectively hinged to the upper and lower parts of the central frame (1). A third rod (7) is hinged to the end of the first rod (5) away from the central frame (1), and a push plate is hinged to the end of the third rod (7) away from the first rod (5). The side wall of the push plate away from the third rod (7) is fixedly connected to the inner side wall of the wrapping layer (3). A fourth rod (8) is hinged to the lower part of the push plate. The end of the fourth rod (8) away from the push plate is connected to the second rod (6). The fourth rod (8) is hinged at one end away from the center frame (1); the fifth rod (9) is also hinged at one end away from the push plate. The fifth rod (9) is hinged at one end away from the fourth rod (8) to the side wall of the center block (4). The sixth rod (10) is also hinged at the hinge point between the first rod (5) and the third rod (7). The sixth rod (10) is hinged to the middle of the fourth rod (8). The second rod (6) is parallel to the third rod (7). The fifth rod (9) is parallel to the sixth rod (10). The first rod (5) is parallel to the fourth rod (8). The bottom of the center frame (1) is provided with a drive assembly for driving the center block (4) to slide vertically along the center groove.

3. The experimental apparatus for observing the photodynamic behavior of the fine-spotted grouper according to claim 1, characterized in that, The light source assembly includes a controller and LED lights (11) fixedly connected to the side wall of the wrapping layer (3); the LED lights (11) display different colors respectively, and the controller is used to control the operation of the LED lights (11).

4. The experimental apparatus for observing the photodynamic behavior of fine-spotted grouper according to claim 2, characterized in that, The image recording component includes a camera (12) fixedly connected to the top of the bracket (2), and a controller for controlling the operation of the camera (12) to capture images of the grouper.

5. The experimental apparatus for observing the photodynamic behavior of the fine-spotted grouper according to claim 1, characterized in that, The drive assembly includes a sliding cylinder (13) fixedly connected to the bottom of the central frame (1), and the side walls of the wrapping layer (3) are all fixedly connected to the outer side wall of the sliding cylinder (13); the top of the sliding cylinder (13) is connected to the bottom of the central frame (1), and an electric control cylinder (14) is fixedly connected to the inner bottom wall of the sliding cylinder (13). A connecting rod (15) is fixedly connected to the top of the output shaft of the electric control cylinder (14), and the connecting rod (15) slides vertically with the inner side wall of the sliding cylinder (13); the top of the connecting rod (15) is fixedly connected to the central block (4) on the same axis, and the controller is used to control the operation of the electric control cylinder (14), thereby driving the central block (4) to slide vertically along the inner wall of the central frame (1); the sliding cylinder (13) is provided with an attraction component for attracting grouper.

6. The experimental apparatus for observing the photodynamic behavior of the fine-spotted grouper according to claim 1, characterized in that, The attractant assembly includes a piston plate (16) fixedly sleeved on the connecting rod (15), a piston chamber opened in the sliding cylinder (13), and a attractant for attracting grouper stored in the piston chamber; the piston plate (16) is vertically slidably engaged with the inner side wall of the piston chamber; a control valve (17) is connected to the upper side wall of the piston chamber, and the controller is used to control the operation of the control valve (17) and thus control the release of the attractant; the outer side wall of the sliding cylinder (13) is provided with a guide assembly for adjusting the release position of the attractant.

7. The experimental apparatus for observing the photodynamic behavior of the fine-spotted grouper according to claim 6, characterized in that, The guide assembly includes a flexible tube (18), the top of which is connected to the control valve (17), and the bottom of which is located at the top of the fish passage.

8. The experimental apparatus for observing the photodynamic behavior of fine-spotted grouper according to claim 1, characterized in that, One side of the wrapping layer (3) is detachably connected to a flexible fish-blocking layer (19) on the side away from the central frame (1). The fish-blocking layer (19) is provided with an adjustment component for adjusting the length of the fish-blocking layer (19).

9. The experimental apparatus for observing the photodynamic behavior of fine-spotted grouper according to claim 8, characterized in that, The adjustment assembly includes a double-headed cylinder (20) fixedly connected to the inner wall of the fish-blocking layer (19). The output shafts of the double-headed cylinder (20) are all fixedly connected to support plates (21), and the support plates (21) are all fixedly connected to the inner side wall of the fish-blocking layer (19). The controller is used to control the operation of the double-headed cylinder (20), thereby driving the support plates (21) to move.

10. The experimental apparatus for observing the photodynamic behavior of fine-spotted grouper according to claim 1, characterized in that, The inner wall of the wrapping layer (3) on the side away from the central frame (1) is fixedly connected with counterweights (22).

Images