Fish adaptive flow velocity measuring device and measuring method

Abstract

The invention discloses a fish adaptive flow velocity measuring device and method, and relates to the technical field of experimental equipment, the fish adaptive flow velocity measuring device comprises an annular water tank, a movable runway, a stirrer, a behavior detection module, a flow velocity detection module, a control module and a storage module; the annular water tank comprises an experimental area and a flow making area which are communicated, and the experimental area is used for fish activities; the movable runway is detachably arranged in the experimental area, and the movable runway is used for changing the flow velocity in the experimental area; the stirrer is arranged in the flow generation area; the behavior detection module is arranged in the experimental area and is used for collecting fish behavior information; the flow velocity detection module is arranged in the experimental area and is used for collecting flow velocity information; the stirrer, the behavior detection module and the flow velocity detection module are in communication connection with the control module; the behavior detection module and the flow velocity detection module are both in communication connection with the storage module; according to the technical scheme provided by the invention, the reliability and authenticity of experimental results can be improved.

Description

Technical Field

[0001] This invention relates to the field of experimental equipment technology, and in particular to a device and method for measuring fish adaptation to current velocity. Background Technology

[0002] Understanding the adaptability of fish to different flow velocities is of great significance in fields such as aquaculture, ecological research, and fishery resource protection. Traditional methods for measuring fish flow velocity have many limitations. For example, some testing equipment cannot simulate the complex and variable water flow environment in natural waters and can only test the flow velocity of fish for a single index. They cannot achieve multi-dimensional flow velocity testing for fish and cannot reflect the true activity and adaptability of fish in different water flow environments. Summary of the Invention

[0003] The main objective of this invention is to provide a device and method for measuring fish adaptation to current velocity, which aims to improve the reliability and authenticity of experimental results.

[0004] To achieve the above objectives, the present invention provides a fish adaptation current velocity measuring device, comprising:

[0005] An annular water tank, comprising an interconnected experimental area and a flow-generating area, wherein the experimental area is used for fish activity;

[0006] A movable running track, which can be detached and installed within the experimental area, is used to change the flow velocity within the experimental area.

[0007] A mixer, wherein the mixer is located in the flow-generating zone;

[0008] A behavior detection module is located in the experimental area and is used to collect fish behavior information.

[0009] A flow velocity detection module is located in the experimental area and is used to collect flow velocity information.

[0010] The control module, the mixer, the behavior detection module, and the flow rate detection module are all communicatively connected to the control module; and

[0011] The storage module is connected to both the behavior detection module and the flow rate detection module.

[0012] In one embodiment, the annular water tank includes multiple experimental zones, which are sequentially connected. Each experimental zone is equipped with a movable track, a behavior detection module, and a flow rate detection module.

[0013] In one embodiment, rectifier plates are provided on both opposite sides of the experimental area.

[0014] In one embodiment, the behavior detection module includes a surface camera and an underwater camera, with the surface camera positioned above the experimental area and the underwater camera positioned within the experimental area.

[0015] In one embodiment, the flow rate detection module includes multiple flow meters, which are spaced apart vertically within the experimental area.

[0016] In one embodiment, the fish adaptation flow velocity measuring device includes two mixers, which are spaced apart in the flow generation zone.

[0017] This invention also proposes a method for measuring fish-induced current velocity, applied to the fish-adapted current velocity measuring device described above, characterized in that the method for measuring fish-induced current velocity includes:

[0018] Install the movable racetrack of the corresponding size according to the size specifications of the experimental fish;

[0019] The experimental fish were placed in the experimental area;

[0020] The control module sets the initial flow rate and duration, and gradually increases the flow rate.

[0021] The behavior detection module collects behavioral information of the experimental fish and stores it in the storage module.

[0022] The flow velocity detection module collects flow velocity information and stores it in the storage module.

[0023] Among them, the flow velocity information when the experimental fish turned to the opposite direction of the current is the induced flow velocity.

[0024] This invention also proposes a method for measuring the critical flow velocity of fish, applied to the fish adaptation flow velocity measuring device described above. The method for measuring the critical flow velocity of fish includes:

[0025] Install the movable racetrack of the corresponding size according to the size specifications of the experimental fish;

[0026] The experimental fish were placed in the experimental area;

[0027] The control module sets the initial flow rate and duration, and gradually increases the flow rate.

[0028] The behavior detection module collects behavioral information of the experimental fish and stores it in the storage module.

[0029] The flow velocity detection module collects flow velocity information and stores it in the storage module.

[0030] Among them, the flow velocity information when the experimental fish stays on the edge for more than 20 seconds without swimming is the critical flow velocity.

[0031] This invention also proposes a method for measuring the differences in growth traits among different fish species under the same environment, applied to the fish adaptation to current velocity measuring device described above. The method for measuring the differences in growth traits among different fish species under the same environment includes:

[0032] Experimental fish were placed in multiple experimental zones, with different species of experimental fish in each experimental zone.

[0033] Based on the daily tidal flow changes in the actual sea area, the flow rate and duration are set through the control module;

[0034] The behavior detection module collects behavioral information of the experimental fish and stores it in the storage module.

[0035] The flow velocity detection module collects flow velocity information and stores it in the storage module.

[0036] After a preset period, the body length and weight of each experimental fish were measured.

[0037] This invention also proposes a method for measuring the behavioral changes of the same species of fish under different flow velocities, applied to the fish adaptation to flow velocity measuring device described above. The method for measuring the behavioral changes of the same species of fish under different flow velocities includes:

[0038] The flow rate and duration are set via the control module;

[0039] Different specifications of the movable running track were installed in different experimental areas;

[0040] The same type of experimental fish of the same size and specifications were placed in different experimental areas;

[0041] The behavior detection module collects behavioral information of the experimental fish and stores it in the storage module.

[0042] The flow velocity detection module collects flow velocity information and stores it in the storage module.

[0043] In the technical solution of this invention, under the control of the stirring control module, the stirrer can simulate the complex and variable annular or multi-regional water flow environment in natural waters, improving the reliability and authenticity of experimental results. The movable runway can change the flow velocity within the experimental area to meet different experimental needs. The behavior detection module and flow velocity detection module respectively collect fish behavior information and flow velocity information, and are closely connected with the control module and storage module, forming a highly efficient integrated data acquisition and analysis system. This achieves real-time, synchronous monitoring of fish behavior and flow velocity, improving the accuracy and consistency of the data. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of the present invention or 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 only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0045] Figure 1 A schematic diagram of an embodiment of the fish adaptation flow velocity measuring device provided by the present invention;

[0046] Figure 2 A schematic diagram of another embodiment of the fish adaptive current velocity measuring device provided by the present invention;

[0047] Figure 3 A schematic diagram of another embodiment of the fish adaptive current velocity measuring device provided by the present invention;

[0048] Figure 4 This is a schematic diagram of a structure of an embodiment of the movable running track provided by the present invention;

[0049] Figure 5 This is a schematic diagram of a rectifier board according to an embodiment of the present invention.

[0050] Explanation of icon numbers:

[0051] 1. Circular water tank; 2. Experimental area; 3. Flow generation area; 4. Mixer; 5. Rectifier plate; 6. Crossbeam; 7. Movable runway; 8. Underwater camera; 9. Flow meter; 10. Surface camera; 11. Control module; 12. Storage module.

[0052] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0053] 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0054] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0055] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0056] This invention proposes a device for measuring fish adaptation to current velocity.

[0057] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 In one embodiment of the present invention, the fish adaptation flow velocity measurement device includes an annular water tank 1, a movable raceway 7, a mixer 4, a behavior detection module, a flow velocity detection module, a control module 11, and a storage module 12. The annular water tank 1 includes an experimental area 2 and a flow-generating area 3 connected to each other. The experimental area 2 is used for fish activity. The movable raceway 7 is detachably installed in the experimental area 2 and is used to change the flow velocity in the experimental area 2. The mixer 4 is installed in the flow-generating area 3. The behavior detection module is installed in the experimental area 2 and is used to collect fish behavior information. The flow velocity detection module is installed in the experimental area 2 and is used to collect flow velocity information. The mixer 4, the behavior detection module, and the flow velocity detection module are all communicatively connected to the control module 11. The behavior detection module and the flow velocity detection module are both communicatively connected to the storage module 12.

[0058] The annular water tank 1 is waist-shaped, with a partition in the middle separating the experimental area 2 and the flow generation area 3. The partition is connected to the side wall through multiple crossbeams 6 to ensure the overall stability of the device.

[0059] The movable running track 7 can be detached and installed in the experimental area 2. The movable running track 7 has various sizes and specifications. By replacing the movable running track 7 with different sizes and specifications, the cross-sectional area through which the water flows in the experimental area 2 can be changed, thereby changing the flow velocity in the experimental area 2.

[0060] The mixer 4 is installed at the bottom center of the flow-generating zone 3. After starting, the blades rotate to generate water flow. The water flow gathers in the flow-generating zone 3 and enters the experimental zone 2 through the connection port, providing water flow power for the experimental zone 2. By controlling the rotation speed of the mixer 4, the flow velocity range within the experimental zone 2 can be initially set.

[0061] In the technical solution of this invention, under the control of the stirring control module 11, the stirrer 4 can simulate the complex and variable annular or multi-regional water flow environment in natural waters, improving the reliability and authenticity of experimental results. The movable track 7 can change the flow velocity within the experimental area 2 to meet different experimental needs. The behavior detection module and flow velocity detection module respectively collect fish behavior information and flow velocity information, and are closely connected with the control module 11 and the storage module 12 to form a highly efficient integrated data acquisition and analysis system. This achieves real-time, synchronous monitoring of fish behavior and flow velocity, improving the accuracy and consistency of the data.

[0062] Furthermore, in one embodiment of the present invention, please refer to... Figure 1 , Figure 2 and Figure 3 The annular water tank 1 includes multiple experimental zones 2, which are sequentially connected. Each experimental zone 2 is equipped with a movable raceway 7, a behavior detection module, and a flow velocity detection module. By setting up multiple experimental zones 2, each with its own independent movable raceway 7, behavior detection module, and flow velocity detection module, multiple sets of comparative measurements can be simultaneously performed on the flow velocity adaptation of different species of fish or the same species of fish at different growth stages. For example, the behavioral changes of small and large fish under different flow velocities can be measured simultaneously, or the adaptive changes of the same species of fish to flow velocity from juvenile to adult can be observed, thus providing a more comprehensive understanding of the fish's flow velocity adaptability. In this embodiment, three experimental zones 2 are set up. The first and third experimental zones 2 are respectively connected to the flow-generating zone 3. Water flows from the flow-generating zone 3 into the first, second, and third experimental zones 2 sequentially, and then flows back to the flow-generating zone 3 to complete the circulation.

[0063] To improve the stability of the water flow in experimental zone 2, please refer to [link / reference needed]. Figure 1 and Figure 5In one embodiment of the present invention, rectifier plates 5 are provided on both opposite sides of the experimental zone 2. The interior of the rectifier plate 5 is a hexagonal honeycomb channel. The hexagonal structure of the channel has a good guiding effect on the water flow, making the water flow more stable and evenly distributed when passing through the rectifier plate 5. A more stable water flow environment helps the behavior detection module and the flow velocity detection module to collect data more accurately. The behavior detection module can more clearly capture the dynamic behavior of fish in stable water flow, avoiding problems such as abnormal fish behavior or blurry images caused by water flow turbulence; the flow velocity detection module can also more accurately measure the actual flow velocity in the experimental zone 2, reducing the flow velocity measurement error caused by factors such as eddies, thereby improving the measurement accuracy of the entire device and providing higher quality data support for the study of fish adapting to flow velocity. When multiple experimental zones 2 are set up, adjacent experimental zones 2 are separated by rectifier plates 5 to ensure the stability of the water flow in each experimental zone 2.

[0064] Specifically, in one embodiment of the invention, please refer to... Figure 1 The behavior detection module includes a surface camera 10 and an underwater camera 8. The surface camera 10 is positioned above the experimental area 2, while the underwater camera 8 is located inside the experimental area 2. The surface camera 10 is fixed to the top of the experimental area 2 by a bracket with an adjustable angle to ensure that the surface camera 10 can cover the entire upper area of ​​the experimental area 2. The surface camera 10 is mainly used to observe fish leaping out of the water, swimming trajectories, tail wagging frequency, and reactions to stimuli near the water surface. The underwater camera 8 is installed on one side of the bottom of the experimental area 2 and is encapsulated in a waterproof shell. It can clearly capture the underwater dynamics of fish in the experimental area 2, such as swimming trajectories, tail wagging frequency, and resting time. The underwater camera 8 is fixed to the bottom of the experimental area 2 by a suction cup and its position and angle can be flexibly adjusted to adapt to different experimental needs. The underwater camera 8 is also equipped with an infrared supplementary light, which can provide sufficient illumination in low-light environments to ensure image clarity. The combination of the surface camera 10 and the underwater camera 8 enables comprehensive monitoring of fish behavior.

[0065] Specifically, in one embodiment of the present invention, please refer to... Figure 1The flow velocity detection module includes multiple flow meters 9, which are spaced vertically within the experimental zone 2. Specifically, at different depths within the experimental zone 2, a flow meter 9 is placed at regular intervals, arranged sequentially from the bottom upwards, for a total of 3-5 flow meters 9. The vertical spacing of multiple flow meters 9 allows for comprehensive measurement of flow velocity at different depths within the experimental zone 2. This design obtains vertical flow velocity distribution data within the experimental zone 2, providing a more accurate reflection of the actual water flow conditions compared to measuring flow velocity at only a single depth. By measuring flow velocity at multiple depths, the flow velocity conditions within the experimental zone 2 can be controlled more precisely. The control module 11 can make finer adjustments to the mixer 4 and the movable raceway 7 based on the data fed back from each flow meter 9, ensuring that the flow velocity within the experimental zone 2 meets the experimental requirements.

[0066] Furthermore, in one embodiment of the present invention, please refer to... Figure 3 The fish adaptation flow velocity measurement device includes two mixers 4, which are spaced apart in the flow-generating zone 3. Each mixer 4 can independently adjust its speed, allowing for different speed combinations to be set according to experimental needs during operation. For example, when a higher flow velocity is required, both mixers 4 can operate simultaneously at higher speeds; when a lower flow velocity is required, one mixer 4 can operate at a lower speed, while the other mixer 4 can stop or operate at an even lower speed. Furthermore, the two mixers 4 can operate alternately to simulate the periodic changes in water flow in natural water bodies.

[0067] This invention also proposes a method for measuring fish-induced current velocity, applied to the aforementioned fish-adapted current velocity measuring device. The method for measuring fish-induced current velocity includes:

[0068] Step 1: Install the corresponding movable racetrack 7 according to the size specifications of the experimental fish;

[0069] Step 2: Place the experimental fish into experimental area 2;

[0070] Step 3: Set the initial flow rate and duration through control module 11, and gradually increase the flow rate;

[0071] Step 4: Collect behavioral information of the experimental fish through the behavior detection module and store it in the storage module 12;

[0072] Step 5: Collect flow velocity information through the flow velocity detection module and store it in the storage module 12;

[0073] Among them, the flow velocity information when the experimental fish turned to the opposite direction of the current is the induced flow velocity.

[0074] The corresponding specification of the movable raceway 7 refers to a raceway 7 that allows the experimental fish to turn around and swim freely. Before the experimental fish are introduced, the water quality in experimental zone 2 is tested and adjusted to meet the survival requirements of the experimental fish, including parameters such as water temperature, salinity, pH, and dissolved oxygen. The experimental water flows sequentially through the flow-generating zone 3, the rectifier plate 5, experimental zone 2, and finally back into the flow-generating zone 3, forming a unidirectional flow.

[0075] The initial flow rate and duration are set via control module 11. The initial flow rate should be set according to the species of experimental fish and the expected range of flow rates they will adapt to. For example, for small fish, they should first remain still for 25-60 minutes, and the initial flow rate can be set to 0.2 m / s; for large fish, they should first remain still for 25-60 minutes, and the initial flow rate can be set to 0.5 m / s. The duration is generally set to 5-15 minutes to allow the experimental fish to gradually adapt to the experimental environment and the initial flow rate. During the experiment, the flow rate is gradually increased via control module 11. The magnitude of each increase can be adjusted according to experimental needs, generally increasing by 0.1-0.3 m / s each time. Each flow rate level is maintained for a certain period of time, such as 3-5 minutes, and the behavioral response of the experimental fish is observed to ensure that they can adapt to the new flow rate.

[0076] The behavioral detection module collects behavioral information of the experimental fish, including swimming trajectory, tail wagging frequency, body posture, and resting time. The surface camera 10 and the underwater camera 8 work simultaneously to record the dynamic behavior of the experimental fish from all angles.

[0077] The flow velocity information within experimental zone 2 is collected by a flow velocity detection module, including flow velocity values ​​at different locations and depths. Multiple flow meters 9 are spaced vertically to measure flow velocity changes at various depths within experimental zone 2 in real time.

[0078] During the experiment, the behavior of the experimental fish was closely observed. When the fish turned to swim against the current, the flow velocity at that moment was recorded; this velocity is the fish's perceived flow velocity. For example, if the fish began swimming against the current when the flow velocity reached 1.2 m / s, then 1.2 m / s is the fish's perceived flow velocity. The perceived flow velocity can be determined by manually observing the fish's behavior and using image data from the behavior detection module for further analysis, while simultaneously combining this with precise recording of the flow velocity data from the flow velocity detection module.

[0079] In addition, measurements were performed both individually and in groups. For individual measurements, one experimental fish was introduced at a time, repeated more than 30 times. For group measurements, 10 fish were introduced at a time, repeated more than 3 times. In group measurements, the flow velocity was recorded as the induced flow velocity of the fish group when half of the experimental fish turned to the opposite direction of the current.

[0080] This measurement method, by gradually increasing the flow velocity and observing the behavioral responses of the experimental fish, can accurately determine the flow velocity when the fish turn to the opposite direction of the current, i.e., the sensed flow velocity. This method can directly reflect the fish's perception and adaptation to flow velocity, providing crucial data for fish behavioral research.

[0081] This invention also proposes a method for measuring the critical flow velocity of fish, applied to the aforementioned fish adaptation flow velocity measuring device. The method for measuring the critical flow velocity of fish includes:

[0082] Step 1: Install the corresponding movable racetrack 7 according to the size specifications of the experimental fish;

[0083] Step 2: Place the experimental fish into experimental area 2;

[0084] Step 3: Set the initial flow rate and duration through control module 11, and gradually increase the flow rate;

[0085] Step 4: Collect behavioral information of the experimental fish through the behavior detection module and store it in the storage module 12;

[0086] Step 5: Collect flow velocity information through the flow velocity detection module and store it in the storage module 12;

[0087] Among them, the flow velocity information when the experimental fish stays on the edge for more than 20 seconds without swimming is the critical flow velocity.

[0088] The corresponding specification of the movable raceway 7 refers to a raceway 7 that allows the experimental fish to turn around and swim freely. Before the experimental fish are introduced, the water quality in experimental zone 2 is tested and adjusted to meet the survival requirements of the experimental fish, including parameters such as water temperature, salinity, pH, and dissolved oxygen. The experimental water flows sequentially through the flow-generating zone 3, the rectifier plate 5, experimental zone 2, and finally back into the flow-generating zone 3, forming a unidirectional flow.

[0089] The initial flow rate and duration are set via control module 11. The initial flow rate should be set according to the species of experimental fish and the expected range of flow rates they will adapt to. For example, for small fish, they should first remain still for 25-60 minutes, and the initial flow rate can be set to 0.2 m / s; for large fish, they should first remain still for 25-60 minutes, and the initial flow rate can be set to 0.5 m / s. The duration is generally set to 5-15 minutes to allow the experimental fish to gradually adapt to the experimental environment and the initial flow rate. During the experiment, the flow rate is gradually increased via control module 11. The magnitude of each increase can be adjusted according to experimental needs, generally increasing by 0.1-0.3 m / s each time. Each flow rate level is maintained for a certain period of time, such as 10-15 minutes, and the behavioral response of the experimental fish is observed.

[0090] The behavioral detection module collects behavioral information of the experimental fish, including swimming trajectory, tail wagging frequency, body posture, and resting time. The surface camera 10 and the underwater camera 8 work simultaneously to record the dynamic behavior of the experimental fish from all angles.

[0091] The flow velocity information within experimental zone 2 is collected by a flow velocity detection module, including flow velocity values ​​at different locations and depths. Multiple flow meters 9 are spaced vertically to measure flow velocity changes at various depths within experimental zone 2 in real time.

[0092] During the experiment, the behavior of the experimental fish was closely observed. When the fish exhibited edge-hugging behavior and remained motionless for more than 20 seconds, it was considered fatigued, and the current velocity at this time was recorded. This current velocity is the critical current velocity for the experimental fish. For example, if the experimental fish started to huddle along the edge when the current velocity reached 1.5 m / s and remained motionless for more than 20 seconds, then 1.5 m / s is the critical current velocity for that experimental fish.

[0093] In addition, measurements were taken individually and in groups. For individual measurements, one experimental fish was placed in at a time and repeated more than 30 times. For group measurements, 10 fish were placed in at a time and repeated more than 3 times.

[0094] This measurement method, by gradually increasing the flow velocity and observing the behavioral responses of the experimental fish, can accurately determine the flow velocity at which the fish remain stationary for more than 20 seconds along the edge, i.e., the critical flow velocity. This method can directly reflect the fatigue point of fish at a specific flow velocity, providing crucial data for fish physiological and behavioral research.

[0095] This invention also proposes a method for measuring the differences in growth traits among different fish species under the same environment, applied to the aforementioned fish adaptation to current velocity measuring device. The method for measuring the differences in growth traits among different fish species under the same environment includes:

[0096] Step 1: Place experimental fish in multiple experimental zones 2, with each experimental zone 2 containing a different type of experimental fish;

[0097] Step 2: Based on the daily tidal flow changes in the actual sea area, set the flow rate and duration through control module 11;

[0098] Step 3: Collect behavioral information of the experimental fish through the behavior detection module and store it in the storage module 12;

[0099] Step 4: Collect flow velocity information through the flow velocity detection module and store it in the storage module 12;

[0100] Step 5: After the preset period, measure the body length and weight of each experimental fish.

[0101] Experimental fish were placed in multiple experimental zones 2, ensuring that the species of fish in each experimental zone 2 were different. The number of experimental fish in each experimental zone 2 was determined according to the experimental design, and was generally kept the same for comparison purposes, such as placing 30 experimental fish in each experimental zone 2.

[0102] Based on the daily tidal current variations in the actual sea area, the flow velocity and duration are set through the control module 11. First, tidal data for the target sea area is collected, including flow velocity variation curves and durations during high and low tides. For example, in a certain nearshore sea area, the daily tidal current velocity gradually increases from 0.1 m / s to 0.5 m / s during high tide, lasting approximately 3 hours; during low tide, the flow velocity gradually decreases from 0.5 m / s to 0.1 m / s, lasting approximately 3 hours. Based on this data, a flow velocity variation program is preset in the control module 11, enabling the flow velocity in experimental area 2 to simulate the tidal variation patterns of that sea area.

[0103] The behavioral detection module collects behavioral information of the experimental fish, including swimming trajectory, tail wagging frequency, and resting time. The surface camera 10 and the underwater camera 8 work simultaneously to record the dynamic behavior of the experimental fish from all angles.

[0104] The flow velocity information within experimental zone 2 is collected by a flow velocity detection module, including flow velocity values ​​at different locations and depths. Multiple flow meters 9 are spaced vertically to measure flow velocity changes at various depths within experimental zone 2 in real time.

[0105] After a predetermined period (e.g., 90 days), the body length and weight of the experimental fish in each experimental zone 2 were measured. Standardized measuring tools were used, such as a measuring plate accurate to 0.1 cm and an electronic scale accurate to 0.1 g. During measurement, the experimental fish were carefully removed from experimental zone 2, surface moisture was gently patted dry, and then the measurements were taken and the data recorded.

[0106] This measurement method enables comparative studies of different fish species within the same apparatus, facilitating the comparison of their growth under the same environment. By placing different species of experimental fish in multiple experimental zones 2, their behavioral and growth differences under the same flow rate can be observed and analyzed simultaneously, providing data support for aquaculture species selection and niche research.

[0107] The flow rate and duration were set based on the daily tidal current variations in the actual sea area to make the experimental environment closer to natural ocean conditions. Compared with an experimental environment with a constant flow rate, simulating tidal changes can better reflect the growth status and adaptability of fish in their natural habitat.

[0108] In addition to recording behavioral and flow velocity information, this method also comprehensively assesses fish growth by measuring their body length and weight. Body length and weight are direct indicators of fish growth, reflecting their nutrient intake and energy accumulation during the experiment. Combining behavioral and flow velocity data allows for a more comprehensive analysis of the mechanisms by which the flow environment affects fish growth.

[0109] This invention also proposes a method for measuring the behavioral changes of the same species of fish under different flow velocities, applied to the aforementioned fish adaptation to flow velocity measuring device. The method for measuring the behavioral changes of the same species of fish under different flow velocities includes:

[0110] Step 1: Set the flow rate and duration via control module 11;

[0111] Step 2: Install movable running tracks 7 of different specifications in different experimental areas 2;

[0112] Step 3: Place the same type of experimental fish of the same size and specifications in different experimental areas 2;

[0113] Step 4: Collect behavioral information of the experimental fish through the behavior detection module and store it in the storage module 12;

[0114] Step 5: Collect flow velocity information through the flow velocity detection module and store it in the storage module 12.

[0115] The flow rate and duration are set via control module 11. Depending on the experimental objective, several different flow rate conditions are selected for comparison. For example, three different sizes of movable running tracks 7 are set up, and the flow rate within experimental area 2 is measured and classified at the same set frequency as low (0.2 m / s), medium (0.5 m / s), and high (0.8 m / s) flow rates, lasting for 2 hours.

[0116] Different sizes of movable runways 7 are installed in different experimental zones 2, so that the flow velocity in different experimental zones 2 is different at the same time.

[0117] The behavioral detection module collects behavioral information of the experimental fish, including swimming trajectory, tail wagging frequency, body posture, and resting time. The surface camera 10 and the underwater camera 8 work simultaneously to record the dynamic behavior of the experimental fish from all angles.

[0118] The flow velocity information within experimental zone 2 is collected by a flow velocity detection module, including flow velocity values ​​at different locations and depths. Multiple flow meters 9 are spaced vertically to measure flow velocity changes at various depths within experimental zone 2 in real time.

[0119] This measurement method creates different flow velocity environments by setting different flow velocities in experimental zones 2 and placing fish of the same species in movable raceways 7 of varying sizes. This allows for precise comparison of behavioral changes in the same fish species under different flow velocities. By analyzing the data collected by the behavior detection module, detailed information can be obtained about the swimming patterns, energy consumption, and other behavioral characteristics of the fish under different flow velocities. For example, under low flow velocity conditions, the experimental fish may swim more slowly and have a lower tail-wagging frequency; while under high flow velocity conditions, the experimental fish may swim more vigorously and have a significantly increased tail-wagging frequency. This comparative analysis helps to deepen the understanding of the adaptation mechanisms and behavioral responses of fish to different flow velocity environments.

[0120] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A fish adaptation current velocity measuring device, characterized in that, include: An annular water tank, comprising an interconnected experimental area and a flow-generating area, wherein the experimental area is used for fish activity; A movable running track, which can be detached and installed within the experimental area, is used to change the flow velocity within the experimental area. A mixer, wherein the mixer is located in the flow-generating zone; A behavior detection module is located in the experimental area and is used to collect fish behavior information. A flow velocity detection module is located in the experimental area and is used to collect flow velocity information. The control module, the mixer, the behavior detection module, and the flow rate detection module are all communicatively connected to the control module; and The storage module is connected to both the behavior detection module and the flow rate detection module.

2. The fish adaptation flow velocity measuring device as described in claim 1, characterized in that, The annular water tank includes multiple experimental zones, which are connected in sequence. Each experimental zone is equipped with a movable track, a behavior detection module, and a flow rate detection module.

3. The fish adaptation flow velocity measuring device as described in claim 1, characterized in that, The experimental area is equipped with rectifier plates on both opposite sides.

4. The fish adaptation flow velocity measuring device as described in claim 1, characterized in that, The behavior detection module includes a surface camera and an underwater camera. The surface camera is located above the experimental area, and the underwater camera is located inside the experimental area.

5. The fish adaptation flow velocity measuring device as described in claim 1, characterized in that, The flow rate detection module includes multiple flow meters, which are spaced apart vertically within the experimental area.

6. The fish adaptation flow velocity measuring device as described in claim 1, characterized in that, The fish adaptation flow velocity measuring device includes two mixers, which are spaced apart in the flow generation zone.

7. A method for measuring fish-induced current velocity, applied to the fish-adaptive current velocity measuring device as described in any one of claims 1 to 6, characterized in that, The method for measuring the fish-induced current velocity includes: Install the movable racetrack of the corresponding size according to the size specifications of the experimental fish; The experimental fish were placed in the experimental area; The control module sets the initial flow rate and duration, and gradually increases the flow rate. The behavior detection module collects behavioral information of the experimental fish and stores it in the storage module. The flow velocity detection module collects flow velocity information and stores it in the storage module. Among them, the flow velocity information when the experimental fish turned to the opposite direction of the current is the induced flow velocity.

8. A method for measuring the critical flow velocity of fish, applied to the fish adaptive flow velocity measuring device as described in any one of claims 1 to 6, characterized in that, The method for measuring the critical flow velocity of fish includes: Install the movable racetrack of the corresponding size according to the size specifications of the experimental fish; The experimental fish were placed in the experimental area; The control module sets the initial flow rate and duration, and gradually increases the flow rate. The behavior detection module collects behavioral information of the experimental fish and stores it in the storage module. The flow velocity detection module collects flow velocity information and stores it in the storage module. Among them, the flow velocity information when the experimental fish stays on the edge for more than 20 seconds without swimming is the critical flow velocity.

9. A method for measuring the differences in growth traits of different fish species under the same environment, applied to the fish adaptation to current velocity measuring device as described in any one of claims 2 to 6, characterized in that, The methods for measuring the differences in growth traits among different fish species under the same environment include: Experimental fish were placed in multiple experimental zones, with different species of experimental fish in each experimental zone. Based on the daily tidal flow changes in the actual sea area, the flow rate and duration are set through the control module; The behavior detection module collects behavioral information of the experimental fish and stores it in the storage module. The flow velocity detection module collects flow velocity information and stores it in the storage module. After a preset period, the body length and weight of each experimental fish were measured.

10. A method for measuring the behavioral changes of the same species of fish under different flow velocities, applied to the fish adaptation to flow velocity measuring device as described in any one of claims 2 to 6, characterized in that, The methods for measuring the behavioral changes of the same fish species under different flow velocities include: The flow rate and duration are set via the control module; Different specifications of the movable running tracks are installed in different experimental areas; The same type of experimental fish of the same size and specifications were placed in different experimental areas; The behavior detection module collects behavioral information of the experimental fish and stores it in the storage module. The flow velocity detection module collects flow velocity information and stores it in the storage module.

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