A fish fry rearing device and a rearing method thereof

Abstract

The application discloses a fish fry cultivation device and a cultivation method thereof and belongs to the technical field of aquaculture. The device comprises a cultivation box, a visual recognition device, a translation mechanism and a timed feeding device. The cultivation box is internally provided with a cultivation pool, which is divided into three feeding areas by a partition plate. The partition plate is provided with isolation holes and fish passing doors capable of being opened and closed. Fish attractors are arranged in the feeding areas on both sides. The feeding device is capable of reciprocating and feeding through the translation mechanism, and the translation direction is perpendicular to the arrangement direction of the feeding areas. The visual recognition device comprises a visual module and a control module. When the visual module finds that the fish fry in the middle feeding area have grown to a preset size, the fish passing doors and the fish attractors are opened. When there is no fish fry in the middle feeding area, the fish passing doors and the fish attractors are closed. The device can realize timed and quantitative feeding, avoid the inconvenience of concentrated feeding, provide a safe and sufficient feeding environment for small fish fry, and reduce the size difference of the fish fry.

Description

Technical Field

[0001] This invention relates to the field of aquaculture technology, and in particular to a fish fry cultivation device and cultivation method. Background Technology

[0002] The cultivation of fish fry, from the selection of broodstock to successful conception, hatching, and eventual adulthood, requires meticulous and responsible management. Managers must constantly monitor the fry's growth and environmental changes, providing timely and appropriate countermeasures to ensure successful cultivation. Fry cultivation mainly includes several steps: fry selection, fertilization, stocking, feeding, and fry training. Among these, the feeding method is crucial. Currently, artificial feeding is commonly used. However, artificial feeding makes it difficult to ensure timely feeding and uneven distribution of feed, easily leading to uneven feeding among the fish. This causes fry to congregate for food, resulting in some fry consuming less, affecting development, causing size differences, uneven growth, and even larger fry preying on smaller ones. Even with evenly distributed feed, some fry may still miss out on food, resulting in stunted growth. Summary of the Invention

[0003] The purpose of this invention is to solve the above-mentioned technical problems and provide a fish fry rearing device and its rearing method. The feeder can feed the rearing pond at regular intervals and in quantitative quantities. The swing and translational movements of the feeder can avoid the inconvenience of feeding caused by the concentration of feed. Through the isolation holes of the partition plate and the fish gate, in conjunction with the fish guide, small-sized fish and large-sized fish can be separated, providing a safe and well-fed growth environment for small-sized fish fry, promoting the growth of small-sized fish fry and reducing the size difference between individual fish fry.

[0004] To achieve the above objectives, the present invention provides the following solution: The present invention discloses a fish fry rearing device, including a rearing box, a visual recognition device, a translation mechanism, and a feeder capable of being started at a time; the rearing box is provided with a rearing pool, the rearing pool is divided into three horizontally arranged feeding areas by a partition plate, the partition plate is provided with an isolation hole and a fish passage that can be opened and closed, the isolation hole and the fish passage are connected to two adjacent feeding areas, the aperture of the isolation hole matches the body size of a preset large-sized fish fry, and a fish guide that can be opened and closed is provided in the feeding areas on both sides; The feeder can move horizontally above the rearing box via a translation mechanism. The direction of translation of the feeder is perpendicular to the arrangement direction of the feeding area. The feeder can swing back and forth along the arrangement direction of the feeding area to feed the fish. The visual recognition device includes a visual module for monitoring the feeding area and a control module for receiving monitoring signals. When the visual module detects that there are fry that have grown to the preset large size in the feeding area in the middle, it opens the fish gate and the fish guide. When there are no fry in the feeding area in the middle, it closes the fish gate and the fish guide.

[0005] Preferably, the translation mechanism includes a support frame mounted on the incubator, the support frame having a horizontal slide rail extending perpendicular to the arrangement direction of the feeding area, the feeder being slidably connected to the horizontal slide rail via a sliding block, and the sliding block being moved along the horizontal slide rail by a drive assembly.

[0006] Preferably, the drive assembly includes a drive motor and a threaded rod rotatably connected to the support frame. The axis of the threaded rod is in the same direction as the extension direction of the horizontal slide rail. The sliding block is threadedly connected to the threaded rod, and the output shaft of the drive motor is coaxially and fixedly connected to the threaded rod.

[0007] Preferably, the feeder includes a feeding box and a telescopic cylinder. The top of the feeding box is hinged to the sliding block, and the bottom of the feeding box is provided with a feeding port. The feeding port is provided with a discharge valve. The cylinder body of the telescopic cylinder is hinged to the sliding block, and the piston rod of the telescopic cylinder is hinged to the feeding box. A timer is installed on the feeding box, and the timer is electrically connected to the telescopic cylinder and the drive motor.

[0008] Preferably, the cultivation tank is equipped with an aerator.

[0009] Preferably, the incubation box is provided with an inlet pipe and an outlet pipe that are connected to the incubation pool. The inlet end of the outlet pipe and the outlet end of the inlet pipe are provided with protective nets, and the outlet end of the outlet pipe and the inlet end of the inlet pipe are provided with on / off valves.

[0010] Preferably, the incubator is provided with a plurality of incubation pools, which are arranged along the extension direction of the horizontal slide rail, and the control module is electrically connected to the timer, the telescopic cylinder and the drive motor.

[0011] A method for raising fish fry was also disclosed, which uses the above-mentioned fish fry raising device and includes the following steps: Feeding: The feeder feeds the three feeding areas of the raising pond at regular intervals and in quantitative quantities. When the vision module detects that the fry in the feeding area in the middle have grown to the preset large size, the control module controls the fish gate and the fish guide to open. The fry are attracted by the fish guide and enter the feeding areas on both sides through the fish gate. When the vision module detects that there are no fry in the feeding area in the middle, the fish gate and the fish guide are closed. Fry smaller than the preset large size can swim back to the feeding area in the middle through the isolation hole.

[0012] Preferably, before the feeding step, the process includes oxygenation and fertilization: introducing unpolluted well water or pond water into the rearing pond, oxygenating the water in the rearing pond using an aerator, adding nutrient solution / water conditioning product to the water in the rearing pond, and then releasing the fish fry into the water in the rearing pond.

[0013] Preferably, after the feeding step, the water is changed: the water in the rearing pond is changed regularly.

[0014] The present invention achieves the following technical effects compared to the prior art:

[0015] In this invention, a feeder can deliver feed at regular intervals and in precise quantities. The feeder's oscillation, combined with a translation mechanism, allows the feed to cover the entire rearing pond, preventing the feed from being too concentrated and making it difficult for the fry to forage. Simultaneously, a visual recognition device controls the opening and closing of the fish gate and the fish guide, keeping larger fish in the rearing areas on either side while smaller fish swim back to the central rearing area, thus isolating them. This ensures that smaller fish have a safer and more abundant living space, preventing them from being bitten by larger fish and promoting their growth so they can catch up with the larger fry as quickly as possible, reducing size differences between individual fry. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments 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 these drawings without creative effort.

[0017] Figure 1 A three-dimensional structural diagram of a fish fry rearing device;

[0018] Figure 2 A schematic diagram of the three-dimensional structure of the incubator;

[0019] Figure 3 This is a top view of the incubator structure.

[0020] Figure 4 This is a schematic diagram of the three-dimensional structure of the translation mechanism;

[0021] Figure 5 for Figure 4 A magnified view of a portion of the image;

[0022] Figure 6 This is a three-dimensional structural diagram of the feeder;

[0023] Figure 7 This is a schematic diagram of the partition plate.

[0024] Explanation of reference numerals in the attached drawings: 1. Culture box; 2. Culture pond; 3. Visual recognition device; 4. Aerator; 5. Fish attractor; 6. Inlet pipe; 7. Drain pipe; 8. Opening and closing valve; 9. Divider plate; 10. Fish passage gate; 11. Isolation hole; 12. Support frame; 13. Support column; 14. Support base; 15. Horizontal slide rail; 16. Sliding block; 17. Drive motor; 18. Threaded rod; 19. Feed box; 20. Telescopic cylinder; 21. Feeding port; 22. Track groove; 23. Guide plate; 24. Rotating seat; 25. Hinge ear plate; 26. Sealing plug; 27. Telescopic rod; 28. Sliding component; 29. ​​Connecting rod; 30. Opening and closing plate. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Example 1

[0027] This embodiment provides a fish fry rearing device, such as... Figures 1 to 7 As shown, it includes an incubator 1, a visual recognition device 3, a translation mechanism, and a feeder.

[0028] The rearing box 1 contains a rearing pool 2, which is divided into three horizontally arranged feeding areas by two partitions 9. Each partition 9 has a fish passage gate 10 and an isolation hole 11. Adjacent feeding areas are connected by the isolation hole 11 and the fish passage gate 10, which can be opened and closed. The diameter of the isolation hole 11 is matched to the pre-set large-size fry size, preventing fry larger than the pre-set large-size fry from passing through, while allowing fry smaller than the pre-set large-size fry to pass through. Fish attractors 5, which can be opened and closed, are located in the feeding areas on both sides. These attractors, such as those containing attractants, can draw fry to the feeding areas.

[0029] The feeder can be started at a time. It can move horizontally above the incubator 1 via a translation mechanism. The direction of translation is perpendicular to the arrangement direction of the feeding zones. The feeder can oscillate back and forth along the arrangement direction of the feeding zones to feed the food. That is, if the feeding zones are arranged along the length of the incubator 2, the feeder moves along the width of the incubator 2 via the translation mechanism, ensuring that the feeding range covers the width of the incubator 2. When feeding, the feeder oscillates back and forth along the length of the incubator 2, ensuring that the feeding range covers the length of the incubator 2, thus guaranteeing that all three feeding zones are fed.

[0030] The visual recognition device 3 includes a visual module and a control module. The visual module is used to monitor the fish fry in the feeding area, while the control module can receive the monitoring signals from the visual module. When the visual module detects that fish fry in the central feeding area have grown to a preset large size, the control module will open the fish gate 10 and the fish attractor 5. The fish attractor 5 will attract the fish fry to enter the feeding areas on both sides from the central feeding area through the fish gate 10. When the visual module finds that there are no fish fry in the central feeding area, it will close the fish gate 10 and the fish attractor 5.

[0031] Working principle:

[0032] After the feeder is set to start at the preset time, it will begin oscillating feeding. At this time, the translation mechanism will automatically control the feeder to move along the rearing tank 2, ensuring that feed is distributed to all three rearing zones. Because the feeder oscillates back and forth, there may actually be more feed in the central feeding zone than in the side rearing zones. Therefore, the fry will tend to concentrate in the central rearing zone, resulting in faster growth. When the vision module detects that the fry in the central rearing zone exceed the preset large fry size, the control module will open the fish gate 10 and the fish guide 5. Under the influence of the fish attractor 5, all fry will pass through the fish gate 10 from the middle into the feeding areas on both sides. After the fish gate 10 and the fish attractor 5 are closed, when feeding is done again, because there is more food in the middle, the fry will tend to swim into the middle feeding area. However, due to the obstruction of the isolation hole 11, only smaller fish can swim into the middle feeding area. When fry in the middle feeding area again exceed the preset large fry size, the fish gate 10 and the fish attractor 5 are reopened, and the above steps are repeated to minimize growth differences and prevent larger fish from eating smaller fish. The reason for the more food in the middle feeding area is twofold: firstly, it is due to the oscillation method of the feeder; secondly, initially there are more fry in the feeding areas on both sides, and the number of fish in the feeding areas on both sides will quickly decrease, resulting in relatively more food in the feeding area at noon.

[0033] Furthermore, in this embodiment, as Figures 1 to 7 As shown, the lengths of the three rearing zones along the arrangement direction can be all the same, or the lengths of the two feeding zones along the arrangement direction can be the same, while the length of the middle feeding zone along the arrangement direction is shorter than that of the two feeding zones. This reduces the activity space for the fry in the middle, forcing the fry to stay more in the two feeding zones. This avoids the fry being concentrated in the middle rearing zone due to the abundance of feed in the middle, resulting in insufficient fry in the rearing zones on both sides.

[0034] In this embodiment, as Figures 1 to 7As shown, the translation mechanism includes a support frame 12, which is mounted on the incubator 1. A horizontal slide rail 15 is provided on the support frame 12. The horizontal slide rail 15 is located above the incubator 1. The extension direction of the horizontal slide rail 15 is perpendicular to the arrangement direction of the feeding area. The feeder is slidably connected to the horizontal slide rail 15 through a sliding block 16. The sliding block 16 moves along the horizontal slide rail 15 through a drive assembly.

[0035] Furthermore, in this embodiment, as Figures 1 to 7 As shown, the support frame 12 has two support columns 13 at each end of the extension direction of the horizontal slide rail 15, and the incubator 1 has two support seats 14 at each end of the direction perpendicular to the feeding area. Each support seat 14 has a vertically arranged blind hole for insertion. The support column 13 is inserted into the blind hole of the corresponding support seat 14 to support the support frame 12 above the incubator 1.

[0036] Furthermore, in this embodiment, as Figures 1 to 7 As shown, the drive assembly includes a drive motor 17 and a threaded rod 18. The drive motor 17 is mounted on a support frame 12, and the threaded rod 18 is rotatably connected to the support frame 12. The axis of the threaded rod 18 is in the same direction as the extension of the horizontal slide rail 15. The output shaft of the drive motor 17 is coaxially and fixedly connected to the threaded rod 18, and a sliding block 16 is threadedly connected to the threaded rod 18. When the drive motor 17 starts, its output shaft drives the threaded rod 18 to rotate. Because the sliding block 16 is slidably connected to the horizontal slide rail 15, the sliding block 16 is limited by the horizontal slide rail 15, so that the sliding block 16 only moves along the extension direction of the horizontal slide rail 15 and does not rotate with the threaded rod 18. Preferably, both ends of the threaded rod 18 can be rotatably connected to the support frame 12 via bearings. The sliding block 16 and the horizontal slide rail 15 can slide in the following manner: the horizontal slide rail 15 has two track grooves 22, and the extension direction of the track grooves 22 is the same as the extension direction of the horizontal slide rail 15. The sliding block 16 has two guide plates 23, which are respectively inserted into the two track grooves 22. Of course, this is only a preferred sliding method for the sliding block 16 and the horizontal slide rail 15, and it does not mean that other sliding methods cannot be used. For example, a track groove 22 can be set on the horizontal slide rail 15, and a T-shaped slider can be set on the sliding block 16. The web of the T-shaped slider extends into the track groove 22, and the flange of the T-shaped slider is located above the track groove 22. Another example is to set a sliding sleeve on the sliding block 16 and fit it on the horizontal slide rail 15, etc.

[0037] In addition, the drive component can also adopt other drive methods, such as a telescopic mechanism. The fixed end of the telescopic mechanism is installed on the support frame 12, and the sliding end of the telescopic mechanism is fixedly connected to the sliding block 16. The telescopic mechanism is such as a scissor linkage mechanism.

[0038] In this embodiment, as Figures 1 to 7As shown, the feeder includes a feeding box 19 and a telescopic cylinder 20. The top of the feeding box 19 is hinged to the bottom of the sliding block 16. The bottom of the feeding box 19 has a feeding port 21, and a discharge valve is provided at the feeding port 21 to control the opening and closing of the feeding port 21. The cylinder body of the telescopic cylinder 20 is hinged to the sliding block 16, and the piston rod of the telescopic cylinder 20 is hinged to the feeding box 19. The telescopic cylinder 20 can be a hydraulic cylinder, an electric cylinder, or a pneumatic cylinder, preferably an electric cylinder. The extension and retraction of the piston rod of the telescopic cylinder 20 can push the feeding box 19 to swing back and forth along the arrangement direction of the three feeding zones. Preferably, the feeding box 19 is provided with a rotating seat 24, and the bottom of the sliding block 16 is equipped with a hinge ear plate 25. The rotating seat 24 and the hinge ear plate 25 are connected by a hinge shaft, and the axis of the hinge shaft is perpendicular to the arrangement direction of the feeding zones. The cylinder body of the telescopic cylinder 20 is hinged to the bottom of the sliding block 16 via another hinged lug 25, and the piston rod of the telescopic cylinder 20 is also hinged to the feeding box 19 via another hinged lug 25. A timer is installed on the feeding box 19, and the timer is electrically connected to the telescopic cylinder 20 and the drive motor 17 to control the start of the telescopic cylinder 20 and the drive motor 17.

[0039] Furthermore, in this embodiment, as Figures 1 to 7 As shown, the feeding box 19 is a conical box. The larger end of the conical box faces upward and is hinged to the sliding block 16. The smaller end of the feeding box 19 faces downward and is provided with a feeding tube with a feeding port 21. The side wall of the larger end of the conical box is provided with a feeding port, and a sealing plug 26 is plugged at the feeding port. The feeding port can be filled by pulling out the sealing plug 26.

[0040] In this embodiment, as Figures 1 to 7 As shown, the rearing pond 2 is equipped with an aerator 4, which can oxygenate the water in the rearing pond 2 to meet the oxygen consumption requirements of the fish fry. The aerator 4 can be an aeration ring, which is installed at the bottom of the rearing pond 2. Of course, the above does not mean that other aeration equipment cannot be used for the aerator 4.

[0041] In this embodiment, as Figures 1 to 7 As shown, the rearing tank 1 is equipped with an inlet pipe 6 and an outlet pipe 7, which are connected to the rearing pond 2. Protective nets are installed at the outlet end of the inlet pipe 6 and the inlet end of the outlet pipe 7. On / off valves 8 are installed at the inlet ends of the outlet and outlet ends of the outlet and outlet pipes 7, respectively. The on / off valves 8 control the opening and closing of the inlet pipe 6 and the outlet pipe 7. Rearing water can be introduced into the rearing pond 2 through the inlet pipe 6, and water can be discharged from the rearing pond 2 through the outlet pipe 7, thus achieving periodic water changes. During water changes, water is continuously added through the inlet pipe 6 and continuously drained through the outlet pipe 7, maintaining a dynamic balance between water inflow and outflow. Water changes can be completed without removing the fish fry. The protective nets intercept the fish fry, preventing them from swimming out along the inlet pipe 6 and outlet pipe 7.

[0042] Furthermore, in this embodiment, as Figures 1 to 7As shown, the opening and closing valves 8 of the water inlet pipe 6 and the drain pipe 7 can be solenoid valves, which are then electrically connected to the control module. The control module can periodically open and close the opening and closing valves 8 to perform periodic water changes.

[0043] Furthermore, in this embodiment, as Figures 1 to 7 As shown, the inlet end of the water inlet pipe 6 is connected to unpolluted well water or pond water, and the outlet end of the drain pipe 7 is connected to a pond or wastewater collection device. A filtration device and a disinfection device are installed at the inlet end of the water inlet pipe 6 and at the outlet end of the drain pipe 7. The disinfection device can be an ultraviolet disinfection device or other disinfection devices.

[0044] In this embodiment, as Figures 1 to 7 As shown, the incubation box 1 contains several incubation ponds 2, which are arranged along the extension direction of the horizontal slide rail 15. This allows for the simultaneous incubation of multiple batches of the same type of fry, as well as the simultaneous incubation of different types of fry. The control module is electrically connected to the timer, the telescopic cylinder 20, and the drive motor 17. The timer sends start information to the control module, which then controls the start of the telescopic cylinder 20 and the drive motor 17. In conjunction with the vision module, the control module controls the rotation of the drive motor 17, causing the feeding box 19 to feed the fry into the different incubation ponds 2.

[0045] Furthermore, in this embodiment, as Figures 1 to 7 As shown, the cultivation pool 2 can be a rectangular pool, the incubator 1 is a rectangular box, the cultivation pool 2 is arranged along the length direction of the incubator 1, the length direction of the cultivation pool 2 is perpendicular to the length direction of the incubator 1, the width direction of the cultivation pool 2 is parallel to the width direction of the incubator 1, and the extension direction of the horizontal slide rail 15 is parallel to the width direction of the cultivation pool 2.

[0046] In this embodiment, as Figures 1 to 7 As shown, the incubation box 1 is equipped with a telescopic rod 27. The fixed end of the telescopic rod 27 is fixed to the incubation box 1, and the telescopic end of the telescopic rod 27 is connected to a sliding member 28. The sliding member 28 is slidably connected to the partition plate 9, and a connecting rod 29 is fixedly connected to the sliding member 28. The connecting rod 29 is equipped with an opening and closing plate 30. The telescopic direction of the telescopic rod 27 is the same as the extension direction of the horizontal slide rail 15, so as to drive the sliding member 28 to slide on the partition plate 9, and then drive the opening and closing plate 30 on the connecting rod 29 to move. The opening and closing plate 30 can block the fish gate 10 in the movement path, thereby realizing the opening and closing of the fish gate 10. When the opening and closing plate 30 moves away from the fish gate 10, the fish gate 10 can be opened; when the opening and closing plate 30 moves closer to the fish gate 10, the fish gate 10 can be gradually closed. The telescopic rod 27 can be an electric telescopic rod, a pneumatic telescopic rod, or a hydraulic telescopic rod. The telescopic rod 27 is electrically connected to the control module to realize the movement control of the opening and closing plate 30.

[0047] In this embodiment, as Figures 1 to 7As shown, the visual recognition device 3 can be equipped with a remote signal transmission module, which can transmit the signals from the visual module to the back-end for remote monitoring by back-end personnel. The visual module can be a high-definition camera, with or without night vision capabilities. The control module can be a microcontroller or PLC controller. The remote signal transmission module can use network transmission or wireless transmission, etc. The back-end includes, but is not limited to, a central control console in the control room, an APP or public account installed on a mobile phone, a webpage, etc.

[0048] Example 2

[0049] This embodiment provides a method for raising fish fry, which uses the fish fry raising device described in Embodiment 1, such as... Figures 1 to 7 As shown, it includes the following steps:

[0050] Feeding: The feeder feeds the three feeding areas of rearing pond 2 at regular intervals and in measured quantities. When the vision module detects that the fry in the central feeding area have grown to the preset large size (due to the back-and-forth swinging of the feeder, there will be more feed in the central feeding area than in the two side feeding areas, so the fry in the central area will grow faster than the fry in the two side feeding areas, so it is sufficient to observe the growth of the fry in the central feeding area first), the control module controls the opening of the fish gate 10 and the fish guide 5. Under the attraction of the fish guide 5, the fry pass through the fish gate 10 and enter the two side feeding areas. Within the feeding area, when the visual module detects that there are no fry in the central feeding area, it closes the fish gate 10 and the fish guide 5. Fry smaller than the preset large-size fry can swim back to the central feeding area through the isolation hole 11. Fry larger than the preset large-size fry will remain in the feeding areas on both sides, thus separating the large and small fry. Because there is more food in the central area, the fry in the central area will quickly catch up with the fry on both sides. At the same time, separating them can also prevent the large fry from biting the small ones. After performing the above operation several times, the difference in fry growth can be reduced.

[0051] Furthermore, in this embodiment, as Figures 1 to 7 As shown, the process includes the following steps: Before the feeding step, oxygenation and fertilization are also included: Unpolluted well water or pond water is introduced into the rearing pond 2, and the water in the rearing pond 2 is oxygenated by the aerator 4 to meet the oxygen demand of the fish fry. Then, nutrient solution / water conditioning product is added to the water in the rearing pond 2, and the fish fry are released into the water in the rearing pond 2 for rearing.

[0052] Furthermore, in this embodiment, as Figures 1 to 7 As shown, after the feeding step, water changing is also included: the water in the rearing pond 2 is changed regularly.

[0053] In this embodiment, as Figures 1 to 7 As shown, the complete cultivation process is as follows:

[0054] S1. Selection of fry: Select healthy fry for later use. You can choose a fry rearing device with one rearing pond 2 or a fry rearing device with multiple rearing ponds 2.

[0055] S2. Increase oxygen and fertilize the water: Introduce unpolluted and safe well water or pond water into the rearing pond 2, and increase oxygen through the aerator 4 to meet the oxygen consumption requirements of the fish fry. Then, sprinkle nutrient solution / water conditioning product into the water of the rearing pond 2 to fertilize the water and meet the nutritional needs of the fish fry. The nutrients in the nutrient solution / water conditioning product can be crushed egg yolk, mayfly insects, etc.

[0056] S3. Stocking: Before stocking, test the water temperature and pH value in rearing pond 2, and test the water temperature difference to ensure that the temperature difference is within 2℃. The temperature can be adjusted by sprinkling water so that the fry can gradually adapt to the environment in rearing pond 2.

[0057] S4. Feeding: The feeder, in conjunction with the translation mechanism, feeds the three feeding areas in a timed and quantitative manner. When the vision module detects that the fry in the middle feeding area have grown to the preset large size, the control module controls the opening of the fish gate 10 and the fish guide 5. Under the attraction of the fish guide 5, the fry pass through the fish gate 10 and enter the feeding areas on both sides. When the vision module detects that there are no fry in the middle feeding area, it closes the fish gate 10 and the fish guide 5. Fry smaller than the preset large size can swim back to the middle feeding area through the isolation hole 11. Fry larger than the preset large size remain in the feeding areas on both sides, thus separating the large and small fry. Because there is more feed in the middle, the fry in the middle will quickly catch up with the fry on both sides. At the same time, separation can also prevent the large fry from biting the small ones. After repeating the above operation several times, the difference in fry growth can be reduced.

[0058] S5. Water Change: Regular water changes are performed through the inlet pipe 6 and the outlet pipe 7 to ensure the growth environment of the fish fry. In actual use, the valves 8 of the inlet pipe 6 and the outlet pipe 7 are opened. When the water in the rearing pond 2 is changed, the valves are opened to change the water.

[0059] S6. Monitoring: Regularly observe and monitor the growth of the fish fry and keep records.

[0060] In this embodiment, as Figures 1 to 7 As shown, monitoring can be carried out periodically by humans or remotely via visual recognition device 3.

[0061] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A fish larvae rearing device characterized by comprising: The application relates to a fish breeding device, which comprises a breeding box, a visual identification device, a translation mechanism and a time-controlled feeder; the breeding box is internally provided with breeding pools, the breeding pools are divided into three horizontally-arranged feeding areas by partition plates, the partition plates are provided with isolation holes and fish-passing doors which can be opened and closed, the isolation holes and the fish-passing doors are communicated with two adjacent feeding areas, the aperture of the isolation hole is matched with the body shape of fish fries of a preset large size, the feeding areas on both sides are provided with fish guiding devices which can be opened and closed; the feeder can be translated above the breeding box through the translation mechanism, the translation direction of the feeder is perpendicular to the arrangement direction of the feeding areas, the feeder can swing back and forth to feed along the arrangement direction of the feeding areas; the visual identification device comprises a visual module for monitoring the feeding areas and a control module capable of receiving monitoring signals; when the visual module finds that the fish fries in the middle feeding area have grown to the body shape of the fish fries of the preset large size, the fish-passing door and the fish guiding device are opened, and when there are no fish fries in the middle feeding area, the fish-passing door and the fish guiding device are closed. The translation mechanism comprises a support frame mounted on the breeding box, the support frame is provided with horizontal sliding rails, the extension direction of the horizontal sliding rails is perpendicular to the arrangement direction of the feeding areas, the feeder is slidably connected to the horizontal sliding rails through sliding blocks, and the sliding blocks are moved along the horizontal sliding rails through a driving assembly; The driving assembly comprises a driving motor and a threaded rod rotatably connected to the support frame, the axis of the threaded rod is in the same direction as the extension direction of the horizontal sliding rails, the sliding blocks are threadedly connected to the threaded rod, and the output shaft of the driving motor is fixedly connected to the threaded rod in a coaxial mode; The feeder comprises a feeding box and a telescopic cylinder, the top of the feeding box is hingedly connected to the sliding block, the bottom of the feeding box is provided with a feeding port, the feeding port is provided with a discharging valve, the cylinder body of the telescopic cylinder is hingedly connected to the sliding block, the piston rod of the telescopic cylinder is hingedly connected to the feeding box, a timer is mounted on the feeding box, and the timer, the telescopic cylinder and the driving motor are electrically connected.

2. The fish larvae rearing apparatus according to claim 1, wherein The breeding pools are internally provided with oxygenators.

3. The fish larvae rearing apparatus according to claim 1, wherein The breeding box is provided with a water inlet pipe and a water outlet pipe communicated with the breeding pools, the water inlet end of the water outlet pipe and the water outlet end of the water inlet pipe are internally provided with protective nets, and the water outlet end of the water outlet pipe and the water inlet end of the water inlet pipe are provided with opening and closing valves.

4. The fish larvae rearing apparatus according to claim 1, wherein The breeding box is internally provided with a plurality of breeding pools, the breeding pools are arranged along the extension direction of the horizontal sliding rails, and the control module and the timer, the telescopic cylinder and the driving motor are electrically connected.

5. A method for rearing fish fry, which employs the fish fry rearing device according to any one of claims 1 to 4, characterized by The application further relates to a fish breeding method, which comprises the following steps: Feeding: the feeder feeds the three feeding areas of the cultivation pond in a timed and quantitative manner; when the visual module identifies that the fish fry in the middle feeding area have grown to a preset large-size fish fry body size, the control module controls the fish gate and the fish attractor to open, the fish fry enters the feeding area on both sides through the fish gate under the attraction of the fish attractor, when the visual module identifies that there is no fish fry in the middle feeding area, the fish gate and the fish attractor are closed, and the fish fry with a body size smaller than the preset large-size fish fry body size can swim back to the middle feeding area through the isolation hole.

6. The method of claim 5, wherein the fish larvae are reared in a tank having a volume of 1,000 to 10,000 liters. Before the feeding step, it further includes oxygenation and water enrichment: introducing non-polluted well water or pond water into the cultivation pond, oxygenating the water body in the cultivation pond through an oxygenator, adding nutrient solution / water conditioning products into the water body in the cultivation pond, and releasing the fish fry into the water body in the cultivation pond.

7. The method of claim 6, wherein the fish larvae are reared in a tank having a volume of 1,000 to 10,000 liters. After the feeding step, it further includes water replacement: periodically replacing the water in the cultivation pond.

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