A device for studying light color tropotaxis behavior of mariculture fish and a method of use

Abstract

The application discloses a mariculture fish light color tropotaxis behavior research device and belongs to the technical field of aquaculture. The mariculture fish light color tropotaxis behavior research device comprises a light-shielding curtain, a culture pond arranged in the light-shielding curtain, and further comprises: an isolation cylinder arranged in the culture pond, a plurality of groups of partition plates are uniformly arranged between the outer wall of the isolation cylinder and the inner wall of the culture pond, a partition area is formed between two adjacent groups of partition plates, the partition area is connected with the isolation cylinder through a channel, and waterproof LED lamp strips are arranged in the plurality of groups of partition areas; a camera for monitoring is fixedly arranged on a support; the isolation cylinder is fixedly arranged in the culture pond, a plurality of groups of partition areas with different colors are uniformly arranged between the culture pond and the isolation cylinder, the number of fry staying in different partition areas and the swimming state of the fry are conveniently observed, the behavior change trend of fry in different light color areas is compared and analyzed, and the suitable light color of different fish species in a culture environment is quickly screened.

Description

Technical Field

[0001] This invention relates to the field of aquaculture technology, and in particular to a device and method for studying the light and color tropism behavior of marine cultured fish. Background Technology

[0002] Fish, due to their specific survival habits, are distributed in different water layers of their natural marine habitats, and the light colors they perceive vary considerably, resulting in differences in the optimal light colors among different fish species. In the breeding and aquaculture of marine fish, environmental factors including light, temperature, water flow, and sound are crucial for broodstock reproduction, fry rearing, and aquaculture production, whether in deep-sea cages and large-scale aquaculture platforms such as engineering vessels or land-based factory farming models. Furthermore, light color significantly affects the growth, feeding, schooling, swimming, and other behaviors and physiological activities of farmed fish. Simultaneously, light color is one of the key factors influencing the distribution of suitable fish populations in deep-sea cages and large enclosures, as well as in land-based factory farming production. Understanding the suitable light colors for farmed fish species allows for the implementation of specific light color schemes within land-based factory farming facilities or large-scale aquaculture facilities and at different water layers to promote rapid growth of farmed fish. It also allows for the use of specific colored light to induce schooling and capture of farmed fish in large facilities, thereby improving the capture efficiency of large-scale aquaculture.

[0003] However, there are currently no mature devices or methods for studying the behavioral tendencies of marine cultured fish under different light colors. Therefore, it is necessary to develop technologies that can quickly screen for suitable light colors for marine cultured fish in order to improve their welfare and promote their rapid growth. Summary of the Invention

[0004] The purpose of this invention is to address the lack of mature devices and methods for studying the behavioral tendencies of marine cultured fish under different light colors in the existing technology, and to propose a device and method for studying the light color tactic behavior of marine cultured fish.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A device for studying the phototactic behavior of marine cultured fish includes a light-shielding curtain and a culture tank set inside the light-shielding curtain. It also includes an isolation cylinder set inside the culture tank, wherein multiple sets of partition plates are evenly arranged between the outer wall of the isolation cylinder and the inner wall of the culture tank, forming a division zone between adjacent sets of partition plates. Each division zone is connected to the inside of the isolation cylinder via a channel, and waterproof LED light strips are installed within each of the multiple division zones. A support is fixedly installed on the culture tank, and a camera for monitoring is fixedly installed on the support.

[0007] To facilitate the installation of the waterproof LED light strip, preferably, multiple sets of mounting rings are provided on the outer wall of the isolation cylinder and the inner wall of the aquaculture pond, the waterproof LED light strip is fixedly installed in the mounting rings, and the mounting rings are provided with a light-shielding part.

[0008] To facilitate control of the opening of the elastic telescopic belt, the light-shielding part further includes an elastic telescopic belt, wherein baffles are fixedly provided at both ends of the elastic telescopic belt, the outer walls of the two sets of baffles abut against the partition plate, and a light-shielding coating is fixedly provided on the inner wall of the elastic telescopic belt.

[0009] To facilitate the installation of the partition plate, preferably, the outer wall of the isolation cylinder is provided with multiple sets of limiting grooves, and a limiting block is fixedly provided at one end of the partition plate, the limiting block being slidably connected in the limiting groove.

[0010] To facilitate the opening and closing of the channel, preferably, a movable plate is slidably arranged inside the channel, and a driving part for driving the movable plate to slide is provided on the isolation cylinder.

[0011] Furthermore, the driving unit includes a screw, wherein a groove is provided inside the isolation cylinder, the movable plate is slidably disposed in the groove, the screw is rotatably disposed in the groove, and the screw is threadedly connected to the movable plate, and a motor for driving the screw to rotate is fixedly disposed on the isolation cylinder.

[0012] Preferably, a drain outlet is provided at the bottom of the isolation cylinder, a floor drain is provided in the drain outlet, a drain pipe connected to the drain outlet is fixedly provided on the aquaculture pond, a first valve is fixedly provided on the drain pipe, and a water inlet pipe for water supply is fixedly provided on the aquaculture pond, a second valve is fixedly provided on the water inlet pipe.

[0013] Furthermore, a cleaning ring is installed in the aquaculture pond, and multiple sets of first nozzles are fixedly installed on the inner wall of the cleaning ring. A collection groove is opened on the outer wall of the cleaning ring, and a feeding groove connected to the collection groove is opened on the cleaning ring. A second nozzle is fixedly installed in the collection groove, and a connecting pipe is fixedly installed on the water inlet pipe. A third valve is fixedly installed on the connecting pipe, and both the first nozzle and the second nozzle are connected to the connecting pipe.

[0014] Furthermore, a rotating shaft is rotatably installed inside the breeding pond, and a reciprocating screw is fixedly installed at one end of the rotating shaft. The cleaning ring is threadedly connected to the reciprocating screw. A rotating cavity is opened inside the breeding pond. A turbine blade is fixedly installed at one end of the rotating shaft that extends into the rotating cavity. One end of the rotating cavity is connected to the water inlet pipe through a first pipe, and the other end of the rotating cavity is connected to the connecting pipe through a second pipe.

[0015] The method of using a device for studying the phototactic behavior of marine cultured fish further includes the following steps:

[0016] Step 1: Set different colors for the divided areas, then place the fish fry in the isolation tubes and record their swimming status after a certain period of time; at the same time, turn on the waterproof LED light strips set on the inner wall of the breeding pond and adjust the light intensity to the set value; open the channel, wait for a certain period of time, and record the stay and swimming status of the fish fry in each area; finally, take out the fish fry and clean the breeding pond.

[0017] Step 2: Connect all the partitioned areas, turn on the waterproof LED light strip installed on the outer wall of the isolation cylinder, and adjust the light intensity to the set value; then place the fish fry in different partitioned areas one by one, wait for a certain period of time, record the stay and swimming status of the fish fry in each area, and finally take out the fish fry and clean the breeding pond.

[0018] Compared with the prior art, the present invention provides a device for studying the phototactic behavior of marine aquaculture fish, which has the following beneficial effects:

[0019] 1. This research device for studying the light color tropism behavior of marine cultured fish involves setting up a culture pond inside a light-shielding curtain, fixing an isolation cylinder inside the culture pond, and then evenly setting up multiple sets of different colored division zones between the culture pond and the isolation cylinder. This facilitates the observation of the number of fry staying in different division zones and their swimming status. By comparing and analyzing the behavioral trends of fry in different light color zones, the device can identify the light color preferences of different fish species. It can be used to quickly screen the suitable light colors for different fish species in the culture environment, so that the light source can be set according to different fish species in land-based factory workshops, deep-sea aquaculture facilities and equipment to promote the growth of cultured fish. At the same time, it can be used to carry out group trapping of cultured fish in large facilities and equipment, thereby improving the capture efficiency.

[0020] 2. This research device for studying the phototactic behavior of marine cultured fish has multiple sets of mounting rings on the outer wall of the isolation cylinder and the inner wall of the culture tank. Waterproof LED light strips are fixedly installed inside the mounting rings, and elastic telescopic belts are slidably installed inside the mounting rings. The opening position and opening range of the mounting rings can be adjusted according to the changes in the position and size of the division area, thereby improving the use effect.

[0021] The parts of this device not described herein are the same as or can be implemented using existing technologies. This invention involves fixing an isolation cylinder in the aquaculture pond and then uniformly setting multiple sets of different colored dividing zones between the aquaculture pond and the isolation cylinder. This facilitates the observation of the number of fry staying in different dividing zones and their swimming status. By comparing and analyzing the behavioral trends of fish fry in different light color zones, the preference of different fish species for light color can be identified. This invention can be used to quickly screen the suitable light color for different fish species in the aquaculture environment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a research device for the phototactic behavior of marine aquaculture fish proposed in this invention. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the structure of a research device for the phototactic behavior of marine aquaculture fish proposed in this invention. Figure 2 ;

[0024] Figure 3 This is a schematic diagram of the structure of a research device for the phototactic behavior of marine aquaculture fish proposed in this invention. Figure 3 ;

[0025] Figure 4 This is a cross-sectional view of a device for studying the phototactic behavior of marine aquaculture fish proposed in this invention.

[0026] Figure 5 This invention provides a device for studying the phototactic behavior of marine aquaculture fish. Figure 4 Enlarged view of section A;

[0027] Figure 6 This invention provides a device for studying the phototactic behavior of marine aquaculture fish. Figure 4 Enlarged view of section B;

[0028] Figure 7 This is a schematic diagram of the cleaning ring structure of a research device for studying the phototactic behavior of marine aquaculture fish proposed in this invention;

[0029] Figure 8 This is a schematic diagram of the elastic stretching band of a research device for studying the light and color tropism behavior of marine aquaculture fish proposed in this invention.

[0030] In the diagram: 1. Aquaculture pond; 101. Support frame; 102. Camera; 103. Blackout curtain; 104. Sewage outlet; 105. Sewage pipe; 106. Water inlet pipe; 107. Connecting pipe; 2. Isolation cylinder; 201. Channel; 202. Limiting groove; 203. Mounting ring; 204. Slide groove; 3. Movable plate; 301. Screw; 302. Motor; 4. Waterproof LED light strip; 401. Elastic telescopic belt; 402. Baffle 5. Plate; 6. Cleaning ring; 7. First nozzle; 8. Second nozzle; 9. First diversion chamber; 10. Second diversion chamber; 11. Collection trough; 12. Discharge trough; 13. Rotating shaft; 14. Turbine blade; 15. Reciprocating screw; 16. Guide rod; 17. Rotating chamber; 18. First pipe; 19. Second pipe; 20. Divider plate; 10. Limiting block; 11. Annular pipe; 12. Branch pipe. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0032] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0033] Example:

[0034] Reference Figures 1-8A device for studying the phototactic behavior of marine aquaculture fish includes a light-blocking curtain 103, which is installed on top and around a culture tank 1. The light-blocking curtain 103 is made of ordinary black light-blocking cloth, which is waterproof, non-reflective, and opaque. The culture tank 1 is located inside the light-blocking curtain 103 and is either a square or round fiberglass tank or a cement tank in a factory aquaculture workshop. Here, a round fiberglass tank is preferred. The device also includes an isolation cylinder 2 installed inside the culture tank 1. The isolation cylinder 2 is fixed inside the culture tank 1 by bolts or clips, preferably bolts. The isolation cylinder 2 can be a prismatic or cylindrical structure, preferably cylindrical. The axis of the isolation cylinder 2 coincides with the axis of the culture tank 1, and an isolation zone is naturally formed on the inner wall of the isolation cylinder 2. Multiple sets of partition plates 8 are evenly arranged between the outer wall of the isolation cylinder 2 and the inner wall of the culture tank 1. The number of partition plates 8 is two to twelve sets, preferably three or four sets. The difference between the three-group and four-group partitions is that in the four-group partitions, both ends of the partition plate 8 abut against the inner wall of the aquaculture pond 1 and the outer wall of the isolation cylinder 2, respectively; while in the three-group partitions, one end of the partition plate 8 abuts against the outer wall of the isolation cylinder 2, and the other end is 10cm-30cm away from the inner wall of the aquaculture pond 1, preferably 30cm, allowing fish fry to swim easily through. The partition plate 8 is made of polyvinyl chloride (PVC) or stainless steel, preferably PVC. The area formed between two adjacent partition plates 8 is called the partition zone. In use, colored stickers are affixed to the surfaces of the two partition plates 8 within the same partition zone. The colored stickers are odorless and non-reflective, and the color of the stickers varies in different areas, with the colors being white, red, yellow, and blue; the yellow sticker is omitted in the three-group partition zone. In the four-group partition zone, each partition zone is connected to the inside of the isolation cylinder 2 via a channel 201. When there are five or six partition zones, the isolation cylinder 2 can be replaced accordingly. Multiple sets of mounting rings 203 are provided on the outer wall of the isolation cylinder 2 and the inner wall of the breeding tank 1. There are two to ten sets of mounting rings 203, preferably four sets. Waterproof LED light strips 4 are fixedly installed in each of the four sets of mounting rings 203. The power of the waterproof LED light strips 4 can be adjusted using a voltage regulator to ensure that the light intensity in each segment is as consistent as possible. The waterproof LED light strips 4 are monochromatic light sources, and the colors of the four sets of waterproof LED light strips 4 are all different. Preferably, from top to bottom, they are white light, red light, yellow light, and blue light. A light-shielding part is provided within the mounting ring 203. This light-shielding part ensures that the light color matches the sticker color. That is, when the light color matches the colored sticker color in the segmented area, the light-shielding part is in the open state; in other areas, it is in the closed state. In use, when there are four segments in the breeding tank 1, only the waterproof LED light strips 4 on the inner wall of the breeding tank 1 are used; when there are three segments in the breeding tank 1, only the waterproof LED light strips 4 on the outer wall of the isolation cylinder 2 are used.A bracket 101 is fixedly installed on the aquaculture pond 1, and a camera 102 for monitoring is fixedly installed on the bracket 101.

[0035] In use, a breeding pond 1 is set up inside the light-blocking curtain 103, and an isolation cylinder 2 is fixedly installed inside the breeding pond 1. Then, multiple sets of dividing areas with different colors are evenly set between the breeding pond 1 and the isolation cylinder 2. This facilitates the observation of the number of fry staying in different dividing areas and their swimming status. The behavioral change trends of fish fry in different light color areas can be compared and analyzed to determine the light color preferences of different fish species. This can be used to quickly screen the suitable light colors for different fish species in the breeding environment, so that the light source can be set according to different fish species in land-based factory workshops. At the same time, in deep-sea aquaculture facilities and equipment, species can be matched according to the water layer corresponding to the suitable light color of the fish species, thereby saving space resources. Multiple sets of mounting rings 203 are opened on the outer wall of the isolation cylinder 2. Waterproof LED light strips 4 are fixedly installed inside the mounting rings 203, and elastic telescopic bands 401 are slidably installed inside the mounting rings 203. The opening position and opening range of the mounting rings 203 can be adjusted according to the position and size of the dividing areas, thereby improving the use effect.

[0036] Reference Figure 3 , Figure 5 and Figure 8 The light-shielding part can be sealed off by a light-shielding material or light-shielding tape, so that it can only emit light within a certain segmented area. Here, we design the light-shielding part as an elastic telescopic band 401. The top and bottom of the elastic telescopic band 401 are fixedly equipped with sliders. On the one hand, this can ensure that the elastic telescopic band 401 slides reliably within the mounting ring 203, and on the other hand, it can prevent the elastic telescopic band 401 from falling out of the mounting ring 203. At both ends of the elastic telescopic band 401, baffles 402 are fixedly installed, and the outer walls of the two sets of baffles 402 are respectively separated from the two sets of partitions in the same segmented area. The side walls of the plate 8 abut against each other, and the inner wall of the elastic stretch band 401 is fixedly provided with a light-shielding coating. In use, the two sets of baffles 402 are tied together with ropes or straps. When installing the partition plate 8, it is placed in the dividing area with the same sticker color. After the partition plate 8 is installed in place, the binding of the two sets of baffles 402 is loosened. The two sets of baffles 402 open automatically under the action of elasticity until the outer wall of the baffle 402 abuts against the partition plate 8. The opening position and opening range of the mounting ring 203 can be adjusted according to the change of the position and size of the dividing area to improve the use effect.

[0037] Reference Figures 1-3Multiple sets of limiting grooves 202 are provided on the outer wall of the isolation cylinder 2. The limiting grooves 202 are provided in two to twenty sets, preferably twelve sets, and the twelve sets are evenly distributed. A limiting block 801 is fixedly provided on one end of the partition plate 8. The limiting block 801 is slidably connected in the limiting groove 202 to facilitate the installation of the partition plate 8. When four sets of partition plates 8 are installed, it should be ensured that there is a channel 201 between two adjacent sets of partition plates 8, and the channel 201 is located in the middle position of the two sets of partition plates 8. When there are five or six sets of partition areas, the isolation cylinder 2 should be replaced accordingly.

[0038] Reference Figure 1 , Figure 2 , Figure 3 and Figure 5 A movable plate 3 is slidably installed in each channel 201. A drive unit is provided on the isolation cylinder 2 to drive the movable plate 3 to slide. The sliding of the movable plate 3 can be controlled by the drive unit, which facilitates the opening and closing of the channel 201.

[0039] Reference Figure 5 The drive unit can be a pneumatic cylinder, hydraulic cylinder, electric telescopic cylinder, or rope to drive the movable plate 3 to slide up and down. Here, we design the drive unit as a screw 301. A groove 204 is provided in the isolation cylinder 2. The movable plate 3 is slidably set in the groove 204, and the screw 301 is rotatably set in the groove 204. The screw 301 is threadedly connected to the movable plate 3. A motor 302 for driving the screw 301 to rotate is fixedly set on the isolation cylinder 2. In use, the screw 301 is driven to rotate by the motor 302, which can drive the movable plate 3 to slide up and down along the groove 204 to realize the opening and closing of the channel 201.

[0040] Reference Figure 4 A drain outlet 104 is provided at the bottom of the isolation cylinder 2. The drain outlet 104 is preferably located in the middle of the bottom of the isolation cylinder 2. A floor drain is installed inside the drain outlet 104. The floor drain is installed inside the drain outlet 104 by bolts or clips to prevent fish fry from entering the drain outlet 104. A drain pipe 105 connected to the drain outlet 104 is fixedly installed on the breeding pond 1. A first valve is fixedly installed on the drain pipe 105. When in use, by opening the first valve, the water in the breeding pond 1 can be discharged to the outside through the drain outlet 104 and the drain pipe 105, which facilitates the cleaning of the breeding pond 1.

[0041] Reference Figures 1-4 A water inlet pipe 106 for water supply is fixedly installed on the aquaculture pond 1, and a second valve is fixedly installed on the water inlet pipe 106. In use, the filtered water can be conveniently transported into the aquaculture pond 1 through the water inlet pipe 106.

[0042] Reference Figure 3, Figure 6 and Figure 7 A cleaning ring 5 is installed in the breeding pond 1, and multiple sets of first nozzles 501 are fixedly installed on the inner wall of the cleaning ring 5. The number of first nozzles 501 is two to twenty, preferably sixteen, and when four division zones are set, four sets are evenly distributed in each division zone. A collection trough 505 is opened on the outer wall of the cleaning ring 5, and a discharge trough 506 connected to the collection trough 505 is opened on the cleaning ring 5 to facilitate the discharge of debris collected by the collection trough 505. Second nozzles 502 are fixedly installed in the collection trough 505, with two to twenty sets, preferably fifteen. A first diversion cavity 503 and a second diversion cavity 504 are opened in the cleaning ring 5. Multiple sets of first nozzles 501 are connected to the first diversion cavity 503, and multiple sets of second nozzles 502 are connected to the second diversion cavity 504. A water inlet pipe 106 is also fixedly installed... A connecting pipe 107 is fixedly installed with a third valve. An annular pipe 9 is fixedly installed at the top of the breeding tank 1. The connecting pipe 107 is connected to the annular pipe 9. The annular pipe 9 is connected to the first diversion chamber 503 and the second diversion chamber 504 through multiple sets of branch pipes 901. Eight sets of branch pipes 901 are provided, and the first nozzle 501 and the second nozzle 502 are connected to the connecting pipe 107. A cleaning ring 5 is installed in the breeding tank 1 and is raised and lowered. The first nozzle 501 and the second nozzle 502 are fixedly installed on the cleaning ring 5, which facilitates rinsing of the breeding tank 1 and improves the use effect.

[0043] Reference Figure 1 , Figure 2 and Figure 6A rotating shaft 6 is rotatably installed inside the aquaculture tank 1. A reciprocating screw 602 is fixedly installed at one end of the rotating shaft 6. The reciprocating screw 602 is existing technology. A cleaning ring 5 is threadedly connected to the reciprocating screw 602. The initial state of the cleaning ring 5 is that it is at the bottom of the reciprocating screw 602, that is, the bottom of the cleaning ring 5 abuts against the inner bottom of the aquaculture tank 1. Two sets of guide rods 603 are fixedly installed inside the aquaculture tank 1. The two sets of guide rods 603 are symmetrically arranged and are slidably connected to the cleaning ring 5 respectively. A rotating cavity 7 is opened inside the aquaculture tank 1. A turbine blade 601 is fixedly installed at one end of the rotating shaft 6 that extends into the rotating cavity 7. There are three to eight sets of turbine blades 601, preferably five sets. One end of the rotating cavity 7 is connected to the water inlet pipe 106 through a first pipe 701, and the other end of the rotating cavity 7 is connected to the connecting pipe 107 through a second pipe 702. When water flows through the first pipe 701 into the rotating cavity 7, it can... The drive shaft 6 rotates in a fixed direction, meaning there is only one direction of rotation for the shaft 6. During use, by closing the third valve on the connecting pipe 107 and opening the second valve on the inlet pipe 106, water can enter the first pipe 701, driving the turbine blades 601 to rotate. This, in turn, drives the cleaning ring 5 to slide up and down via the shaft 6 and the reciprocating screw 602. The water then flows from the second pipe 702 into another section of the connecting pipe 107, and finally exits through the first nozzle 501 and the second nozzle 502, rinsing the aquaculture tank 1 and improving its performance. To ensure the cleaning ring 5 remains stationary when adding water to the aquaculture tank 1, a fourth valve is fixedly installed on the first pipe 701. After rinsing, the third valve is opened and the fourth valve is closed, allowing water to flow directly through the connecting pipe 107 into the first nozzle 501 and the second nozzle 502, facilitating the addition of water to the aquaculture tank 1 and improving its performance.

[0044] The method of using a device for studying the phototactic behavior of marine cultured fish further includes the following steps:

[0045] Step 1: Set different colors for the divided areas, then place the fish fry in the isolation tube 2 and record the swimming status of the fish fry after a certain period of time; at the same time, turn on the waterproof LED light strip 4 set on the inner wall of the breeding pond 1 and adjust the light intensity to the set value; open the channel 201, and after a certain period of time, record the stay and swimming status of the fish fry in each area. Finally, take out the fish fry and clean the breeding pond 1.

[0046] Step Two: Connect all the divided zones, turn on the waterproof LED light strip 4 installed on the outer wall of the isolation cylinder 2, and adjust the light intensity to the set value; then place the fish fry one by one into different divided zones, wait for a certain period of time, and record the residence and swimming status of the fish fry in each area. Finally, remove the fish fry and clean the breeding pond 1. That is to say: first place the fish fry in one of the three divided zones, wait for a certain period of time, record the residence and swimming status of the fish fry in each area, and finally remove the fish fry and clean the breeding pond 1; then refill the water flow, then select a new batch of fish fry and place them in the second divided zone, wait for a certain period of time, record the residence and swimming status of the fish fry in each area, and finally remove the fish fry and clean the breeding pond 1; refill the water flow, place the newly selected fish fry in the remaining divided zone, wait for a certain period of time, record the residence and swimming status of the fish fry in each area, and finally remove the fish fry and clean the breeding pond 1. By analyzing and observing data, video and image data can be collected on the time and number of different fish species staying in different light color areas, as well as their tail wagging, swimming, breathing and other behavioral characteristics when staying or passing through each color segmentation area. At the same time, comparative analysis can be conducted on information such as the swimming behavior, tail wagging frequency and light color directional index of juvenile fish. The collected data can be displayed in digital form to provide a reference for promoting the health and rapid growth of farmed fish from an optical perspective.

[0047] Using the aforementioned device, we preferably studied the phototaxis behavior of juvenile spotted bass. The specific research methods include the following steps:

[0048] 1. Turn off all light sources in the breeding pond 1, open channel 201 to connect the breeding pond 1 with the isolation tube 2, then inject sand-filtered seawater, and put 15 randomly selected healthy juvenile sea bass into the isolation tube 2. At the same time, turn on the computer to view the video data. After the juvenile fish swim slowly, turn on the waterproof LED light strips 4 located on the inner wall of the breeding pond 1 in each color division area and adjust the light intensity to the specified size.

[0049] 2. Simultaneously open the movable panels 3 of the four color-separated areas to allow the juvenile fish to freely enter and exit the isolation tube 2 and each color-separated area. Collect and store 3 to 5 hours of video data through the video acquisition and analysis system until the number of juvenile fish in each color-separated area is relatively stable and their swimming is relatively smooth.

[0050] 3. Observe the changes in the state of juvenile fish before and after entering each color segment using video data, including swimming speed, tail wagging amplitude, gill cover opening and closing, etc. Extract a segment of video data at fixed time intervals, and count the number of juvenile fish in each color segment per unit time, the dwell time, etc. Compare and analyze the color attraction index, swimming speed, tail wagging frequency, respiratory frequency, dwell time, etc. of juvenile fish in each color segment to clarify the degree of preference of juvenile fish for light color. After the observation, remove the juvenile fish and wash all facilities in the breeding pond 1.

[0051] 4. Replace and adjust the partition plate 8 to divide the area into three groups. Turn on the light source installed on the outer wall of the isolation cylinder 2 in each color division of the breeding pond 1 and adjust the light intensity to the specified level. Randomly select 10 healthy juvenile spotted bass and put them into the white light area. At the same time, turn on the video acquisition and analysis system to collect and store 3 to 5 hours of video data until the number of juvenile fish in each color division is relatively stable and their swimming is relatively smooth.

[0052] 5. Turn off the light source, remove the juvenile sea bass from the breeding pond 1 and place them separately. Open the movable plate 3 and drain the water in the breeding pond 1 through the drain outlet 104. Rinse the pond to avoid pheromone residue from the previous batch of juvenile fish. After rinsing, close the movable plate 3 and refill the pond with sand-filtered seawater to maintain a water level of 0.6m.

[0053] 6. Randomly select 10 healthy juvenile spotted bass and place them in the red light area. At the same time, turn on the video acquisition and analysis system to collect and store 3 to 5 hours of video data until the number of juveniles in each color segment is relatively stable and their swimming is relatively smooth.

[0054] 7. Repeat step 5 above.

[0055] 8. Randomly select 10 healthy juvenile spotted bass and place them in the blue light area. At the same time, turn on the video acquisition and analysis system to collect and store 3 to 5 hours of video data until the number of juveniles in each color segment is relatively stable and their swimming is relatively smooth.

[0056] 9. Observe the changes in the state of juvenile fish before and after entering each color segment using video data, including swimming speed, tail wagging amplitude, gill cover opening and closing, etc. Extract a segment of video data at fixed time intervals, and count the number of juvenile fish in each color segment per unit time, the time spent in each segment, etc. Compare and analyze the color attraction index, swimming speed, tail wagging frequency, respiratory frequency, and time spent in each color segment to clarify the degree of preference of juvenile fish for light color.

[0057] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for studying the phototactic behavior of marine cultured fish, comprising a light-blocking curtain (103) and a culture tank (1) disposed within the light-blocking curtain (103), characterized in that, Also includes: The isolation cylinder (2) is installed inside the aquaculture pond (1). Among them, multiple sets of partition plates (8) are evenly arranged between the outer wall of the isolation cylinder (2) and the inner wall of the breeding pond (1). A division area is formed between two adjacent sets of partition plates (8). The division area is connected to the inside of the isolation cylinder (2) through the channel (201). Waterproof LED light strips (4) are provided in each of the multiple sets of division areas. A bracket (101) is fixedly installed on the aquaculture pond (1), and a camera (102) for monitoring is fixedly installed on the bracket (101). Multiple sets of mounting rings (203) are provided on the outer wall of the isolation cylinder (2) and the inner wall of the breeding pond (1). The waterproof LED light strip (4) is fixedly installed in the mounting ring (203), and a light-shielding part is provided in the mounting ring (203). The light-shielding part includes an elastic stretch band (401). Wherein, baffles (402) are fixedly provided at both ends of the elastic stretch band (401), the outer walls of the two sets of baffles (402) abut against the partition plate (8) respectively, and a light-shielding coating is fixedly provided on the inner wall of the elastic stretch band (401); The outer wall of the isolation cylinder (2) has multiple sets of limiting grooves (202), and a limiting block (801) is fixedly provided at one end of the partition plate (8). The limiting block (801) is slidably connected in the limiting groove (202). A movable plate (3) is slidably disposed in the channel (201), and a driving part for driving the movable plate (3) to slide is provided on the isolation cylinder (2); The drive unit includes a screw (301). The isolation cylinder (2) has a sliding groove (204) inside, the movable plate (3) is slidably disposed in the sliding groove (204), the screw (301) is rotatably disposed in the sliding groove (204), and the screw (301) is threadedly connected to the movable plate (3). The isolation cylinder (2) is fixedly provided with a motor (302) for driving the screw (301) to rotate. The bottom of the isolation cylinder (2) is provided with a sewage outlet (104), and a floor drain is provided in the sewage outlet (104). A sewage pipe (105) connected to the sewage outlet (104) is fixedly installed on the breeding pond (1). A first valve is fixedly installed on the sewage pipe (105), and a water inlet pipe (106) for water supply is fixedly installed on the breeding pond (1). A second valve is fixedly installed on the water inlet pipe (106). The aquaculture pond (1) is equipped with a cleaning ring (5) that is raised and lowered. Multiple sets of first nozzles (501) are fixedly installed on the inner wall of the cleaning ring (5). A collection trough (505) is opened on the outer wall of the cleaning ring (5). A feeding trough (506) connected to the collection trough (505) is opened on the cleaning ring (5). A second nozzle (502) is fixedly installed in the collection trough (505). A connecting pipe (107) is fixedly installed on the water inlet pipe (106). A third valve is fixedly installed on the connecting pipe (107). The first nozzle (501) and the second nozzle (502) are both connected to the connecting pipe (107).

2. The device for studying the phototactic behavior of marine aquaculture fish according to claim 1, characterized in that, The breeding pond (1) is equipped with a rotating shaft (6), and a reciprocating screw (602) is fixedly installed at one end of the rotating shaft (6). The cleaning ring (5) is threadedly connected to the reciprocating screw (602). The breeding pond (1) is provided with a rotating cavity (7). A turbine blade (601) is fixedly installed at one end of the rotating shaft (6) extending into the rotating cavity (7). One end of the rotating cavity (7) is connected to the water inlet pipe (106) through the first pipe (701), and the other end of the rotating cavity (7) is connected to the connecting pipe (107) through the second pipe (702).

3. A method of using the research device for studying the phototactic behavior of marine aquaculture fish as described in claim 1 or 2, characterized in that, It also includes the following steps: Step 1: Set different colors for the divided areas, then place the fish fry in the isolation tube (2), wait for a certain period of time, and record the swimming status of the fish fry; at the same time, turn on the waterproof LED light strip (4) set on the inner wall of the breeding pond (1) and adjust the light intensity to the set value; open the channel (201), wait for a certain period of time, record the staying status and swimming status of the fish fry in each area, and finally take out the fish fry and clean the breeding pond (1). Step 2: Connect all the partitioned areas, turn on the waterproof LED light strip (4) set on the outer wall of the isolation tube (2), and adjust the light intensity to the set value; then place the fish fry in different partitioned areas one by one, wait for a certain period of time, record the stay and swimming status of the fish fry in each area, and finally take out the fish fry and clean the breeding pond (1).

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