Marine temporary rearing device for sea fishing tuna

Abstract

The invention discloses a marine temporary rearing device for sea fishing tunas, and aims to provide the marine temporary rearing device which can effectively reduce the problem that fish bodies of juvenile tunas are scratched and collided by the inner wall of the temporary rearing device in the process that the juvenile tunas are transported back to a rearing base from the sea. Therefore, the survival rate of the tuna juvenile fish in the marine transportation process is improved. The edge of the upper end opening of the breeding barrel is provided with an annular net cylinder which extends upwards; the anti-collision device comprises a controller and a camera device, and the camera device monitors the tuna in the breeding barrel in real time and transmits the tuna to the controller; the annular cavity is formed in the side wall of the breeding barrel and surrounds the breeding barrel; the strip-shaped water spraying openings are formed in the inner side wall of the breeding barrel, the strip-shaped water spraying openings communicate with the annular cavity, the strip-shaped water spraying openings are sequentially and evenly distributed along the edge of the bottom face of the breeding barrel, and the strip-shaped water spraying openings extend upwards from the bottom of the breeding barrel; an outlet of the water pump is communicated with the annular cavity.

Description

Technical Field

[0001] The present invention relates to the technical field of tuna artificial breeding, and particularly relates to an offshore temporary culture device for sea-caught tuna. Background Art

[0002] The tuna body is spindle-shaped, and it swims fast. The speed of general adult fish is 30 - 50 kilometers per hour. Compared with adult fish, the swimming speed of juvenile fish is slower. In addition, many studies have shown that once tuna stop swimming, they will suffocate because they always keep their mouths open when swimming, allowing water to flow through the gills to breathe oxygen. Therefore, they can only keep swimming continuously throughout their lives, and they do not rest even at night, only slowing down the swimming speed and reducing metabolism.

[0003] Tuna is a highly valuable fish. Due to the decline of fishery resources and the increasing demand for high-quality fish by people, in recent years, the artificial breeding of tuna has attracted much attention from all parties. However, currently, the problem of how to obtain breeding sources, that is, wild live tuna, plagues the development of this industry.

[0004] Tuna fishing, especially rod fishing, has become the main source of breeding sources because the caught juvenile tuna have less body damage and good activity. The caught juvenile tuna need to be temporarily cultured before they can be transported from the sea back to the breeding base. However, since tuna fishing grounds are generally in the deep sea far from the shore, the transportation time is long, and the available space on fishing boats is limited. During the temporary culture period, traditional temporary culture devices (such as culture barrels or culture cabins on boats) cannot effectively avoid the situation that the bodies of juvenile tuna with fast swimming speed and continuous swimming day and night are scratched and bruised by the inner wall of the device, which affects the survival rate of juvenile tuna and even makes it difficult to be successfully raised to the breeding base.

[0005] For example, Chinese Patent Publication No. CN216018566U, with the invention name of fish temporary culture device, the fish temporary culture device of this application for culturing juvenile tuna also has the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide an offshore temporary culture device for sea-caught tuna that can effectively reduce the problem of the body of juvenile tuna being scratched and bruised by the inner wall of the temporary culture device during the process of transporting juvenile tuna from the sea back to the breeding base, thereby improving the survival rate of juvenile tuna during offshore transportation.

[0007] The technical solution of the present invention is as follows: An offshore temporary culture device for sea-caught tuna, comprising: A culture barrel, on the edge of the upper port of which there is an upwardly extending annular net cylinder; An anti-impact device, comprising: A controller and a camera device. The camera device monitors tuna in the breeding tank in real time and transmits the information to the controller. An annular cavity is arranged inside the side wall of the breeding tank and surrounds the breeding tank. The water level in the breeding tank is higher than the highest position of the annular cavity. A number of strip-shaped water spray nozzles are arranged on the inner side wall of the breeding tank. The strip-shaped water spray nozzles are communicated with the annular cavity. Each strip-shaped water spray nozzle is evenly distributed in sequence along the bottom edge of the breeding tank. The strip-shaped water spray nozzles extend upward from the bottom of the breeding tank. A water pump. The outlet of the water pump is communicated with the annular cavity.

[0008] When the distance between the position of the tuna in the breeding tank captured by the camera device and the inner wall of the breeding tank is less than the set value L, the controller controls the water pump to work. The water pump injects external water into the annular cavity and sprays it into the breeding tank through each strip-shaped water spray nozzle. The water flow drives the tuna away from the inner wall of the breeding tank to prevent it from touching the breeding tank wall.

[0009] The specific working process of a sea fishing tuna offshore temporary breeding device of this solution is as follows. Tuna juveniles are temporarily bred in the breeding tank. The camera device monitors tuna in the breeding tank in real time and transmits the information to the controller. During the swimming process of the tuna juveniles (tuna juveniles generally swim annularly in the breeding tank), when the distance between the position of the tuna in the breeding tank captured by the camera device and the inner wall of the breeding tank is less than the set value L (for example, the set value L is 15 cm), the controller controls the water pump to work. The water pump injects external water into the annular cavity and sprays it into the breeding tank through each strip-shaped water spray nozzle, forming a water flow from the tank wall to the center direction in the breeding tank. The water flow drives the tuna juveniles away from the inner wall of the breeding tank to prevent the tuna juveniles from touching the breeding tank wall. Therefore, during the process of transporting tuna juveniles from the sea back to the breeding base, the problem of the fish body of the tuna juveniles being scratched or bruised by the inner wall of the temporary breeding device can be effectively reduced, thereby improving the survival rate of tuna juveniles during offshore transportation.

[0010] In addition, during the working process of the water pump, the water overflowing from the breeding tank overflows through the annular mesh cylinder, which does not affect the activities of the tuna juveniles and can also prevent the tuna juveniles from escaping.

[0011] Preferably, a circular flexible layer is arranged on the inner side wall of the breeding tank. The circular flexible layer is provided with strip-shaped openings corresponding to the strip-shaped water spray nozzles one by one, and the shape of the strip-shaped openings is the same as that of the strip-shaped water spray nozzles. The function of the circular flexible layer is that once the tuna juveniles hit (touch) the breeding tank, it can play a buffering role and effectively prevent the problem of the tuna juveniles being bruised, stunned or killed.

[0012] Preferably, it further includes a light-shielding upper cover which is arranged above the upper port of the breeding barrel to block the upper port of the breeding barrel, so as to form a dim environment inside the breeding barrel. In this way, the nocturnal living environment of tuna can be simulated inside the breeding barrel, reducing its metabolic level, so as to slow down the swimming speed of the juvenile tuna temporarily cultured in the breeding barrel, thereby further reducing the problem that the body of the juvenile tuna is scratched or bruised by the inner wall of the temporary culture device, and thus improving the survival rate of the juvenile tuna during the sea transportation process.

[0013] Preferably, a feeding port is provided on the light-shielding upper cover, and a lid that can be opened is provided on the feeding port. In this way, the caught juvenile tuna can be put into the breeding barrel through the feeding port for temporary culture, while minimizing the impact on the simulated nocturnal living environment of tuna inside the breeding barrel.

[0014] Preferably, it further includes a drainage pipe. An upward-opening annular water return groove is provided on the upper part of the outer wall of the breeding barrel, and the water overflowing from the upper port of the breeding barrel flows into the annular water return groove. One end of the drainage pipe is communicated with the bottom of the annular water return groove. In this way, during the operation of the water pump, the water overflowing from the breeding barrel will flow into the annular water return groove after overflowing through the annular mesh cylinder, and then be discharged through the drainage pipe.

[0015] Preferably, it further includes a water return pool. The other end of the drainage pipe is connected to the water return pool, and the water inlet of the water pump is communicated with the water return pool through a water inlet pipe. In this way, during the operation of the water pump, the water pump pumps the seawater in the water return pool into the annular cavity. At the same time, the water overflowing from the breeding barrel will flow into the annular water return groove after overflowing through the annular mesh cylinder, and then be discharged back to the water return pool through the drainage pipe to form a cycle.

[0016] Preferably, a number of partition plates are provided in the annular cavity, dividing the annular cavity into several single cavities distributed sequentially around the breeding barrel. Each single cavity is respectively communicated with the water pump outlet through a water injection pipe, and an electromagnetic valve is provided on each water injection pipe. In this way, when the camera device captures that the distance between the position of the tuna in the breeding barrel and the inner wall of the breeding barrel is less than the set value L (for example, the set value L is 15 cm), the controller controls the water pump to work, and at the same time controls the electromagnetic valve on the water injection pipe communicating with the corresponding single cavity to open. The water pump injects external water into the corresponding single cavity, and then sprays it into the breeding barrel through each strip-shaped water spray port communicated with the single cavity, forming a water flow from the barrel wall to the center direction inside the breeding barrel (in this way, the response speed of water flow formation can be improved). The juvenile tuna is driven away from the inner wall of the breeding barrel in time through this water flow, further preventing the juvenile tuna from touching the breeding barrel wall, and effectively reducing the problem that the body of the juvenile tuna is scratched or bruised by the inner wall of the temporary culture device.

[0017] Preferably, the annular cavity extends upward from the bottom of the breeding barrel to the upper part of the breeding barrel.

[0018] Preferably, the strip-shaped water spray nozzles are linear, oblique-linear or spiral-linear.

[0019] The beneficial effects of the present invention are as follows: during the process of transporting juvenile tuna from the sea back to the breeding base, the problem that the body of juvenile tuna is scratched or bruised by the inner wall of the temporary breeding device can be effectively reduced, thereby improving the survival rate of juvenile tuna during the sea transportation process. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of a sea fishing tuna sea temporary breeding device in the first specific embodiment of the present invention.

[0021] Figure 2 is a schematic structural diagram of a sea fishing tuna sea temporary breeding device in the second specific embodiment of the present invention.

[0022] Figure 3 is a schematic cross-sectional diagram of a breeding barrel in the third specific embodiment of the present invention.

[0023] In the figure: breeding barrel 1, annular net cylinder 1.1, annular flexible layer 1.2; anti-collision device 2, annular cavity 2.1, single cavity 2.1.1, strip-shaped water spray nozzle 2.2, partition plate 2.3, strip-shaped through port 2.4; light-shielding upper cover 3; annular water return groove 4. Detailed Embodiments

[0024] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments: Specific Embodiment 1, as Figure 1 shown, a sea fishing tuna sea temporary breeding device includes a breeding barrel 1 and an anti-collision device 2.

[0025] An upwardly extending annular net cylinder 1.1 is provided at the edge of the upper port of the breeding barrel 1. The height of the annular net cylinder 1.1 is not less than 20 cm. In this embodiment, the height of the annular net cylinder 1.1 is 20 - 50 cm. The breeding barrel 1 is a cylindrical barrel or a breeding barrel 1 with a square or other polygonal cross-section.

[0026] The anti-collision device 2 includes a water pump, a controller, a camera device, an annular cavity 2.1 and a plurality of strip-shaped water spray nozzles 2.2 arranged on the inner side wall of the breeding barrel 1. The camera device is connected to the controller through a signal line. The water pump is connected to the controller through a signal line. The camera device includes one or more cameras, and the cameras are located above the breeding barrel 1. The camera device monitors the tuna in the breeding barrel 1 in real time and transmits it to the controller.

[0027] The annular cavity 2.1 is arranged inside the side wall of the culture barrel 1, and the annular cavity 2.1 surrounds the culture barrel 1. In this embodiment, the annular cavity 2.1 extends upward from the bottom of the culture barrel 1 to the upper part of the culture barrel 1. The water level in the culture barrel 1 is higher than the highest position of the annular cavity 2.1.

[0028] The strip-shaped water spray nozzles 2.2 are communicated with the annular cavity 2.1. The strip-shaped water spray nozzles 2.2 are evenly distributed in sequence along the bottom edge of the culture barrel 1. The strip-shaped water spray nozzles 2.2 are distributed in an up-and-down extension. The strip-shaped water spray nozzles 2.2 extend upward from the bottom of the culture barrel 1. In this embodiment, the upper end of the strip-shaped water spray nozzles 2.2 extends to the upper part of the culture barrel 1.

[0029] In one example, the strip-shaped water spray nozzles 2.2 are linear, that is, the strip-shaped water spray nozzles 2.2 extend in the vertical direction.

[0030] In another example, the strip-shaped water spray nozzles 2.2 are oblique linear, that is, the strip-shaped water spray nozzles 2.2 are inclined from bottom to top.

[0031] In the third example, the strip-shaped water spray nozzles 2.2 are spiral linear.

[0032] When the camera device captures that the distance between the position of the tuna in the culture barrel 1 and the inner wall of the culture barrel 1 is less than the set value L (the set value L is 10 - 20 cm in this embodiment), the controller controls the water pump to work. The water pump injects the water from the outside into the annular cavity 2.1 and sprays it into the culture barrel 1 through each strip-shaped water spray nozzle 2.2, and drives the tuna away from the inner wall of the culture barrel 1 through the water flow to prevent it from touching the wall of the culture barrel 1.

[0033] A kind of offshore temporary culture device for sea fishing tuna in this embodiment is arranged on a ship.

[0034] The specific working process of a kind of offshore temporary culture device for sea fishing tuna in this embodiment is as follows. The juvenile tuna are temporarily cultured in the culture barrel 1, and the camera device monitors the tuna in the culture barrel 1 in real time and transmits the information to the controller. During the swimming process of the juvenile tuna (the juvenile tuna generally swim in a circular motion in the culture barrel 1), when the distance between the position of the tuna in the culture barrel 1 captured by the camera device and the inner wall of the culture barrel 1 is less than the set value L (for example, the set value L is 15 cm), the controller controls the water pump to work. The water pump injects the water from the outside into the annular cavity 2.1 and sprays it into the culture barrel 1 through each strip-shaped water spray port 2.2 (since the water level in the culture barrel 1 is higher than the highest position of the annular cavity 2.1 and the annular cavity 2.1 is filled with water, when the water pump injects the water from the outside into the annular cavity 2.1, it can quickly spray out into the culture barrel 1 through each strip-shaped water spray port 2.2), and a water flow from the barrel wall to the center direction is formed in the culture barrel 1 in time. The juvenile tuna are driven away from the inner wall of the culture barrel 1 by this water flow to prevent the juvenile tuna from touching the wall of the culture barrel 1. Therefore, during the process of transporting the juvenile tuna from the sea back to the breeding base, the problem that the fish body of the juvenile tuna is scratched and bruised by the inner wall of the temporary culture device can be effectively reduced, thereby improving the survival rate of the juvenile tuna during the sea transportation process.

[0035] During the working process of the water pump, the water overflowing from the culture barrel 1 overflows through the annular mesh cylinder 1.1, which does not affect the activities of the juvenile tuna and can also prevent the juvenile tuna from escaping.

[0036] Specifically, as Figure 1 shown, a sea fishing tuna sea temporary culture device further includes a drainage pipe. An annular return water groove 4 with an upward opening is arranged on the upper part of the outer wall of the culture barrel 1. The water overflowing from the upper port of the culture barrel 1 flows into the annular return water groove 4, and one end of the drainage pipe is communicated with the bottom of the annular return water groove 4. In this way, during the working process of the water pump, the water overflowing from the culture barrel 1 overflows through the annular mesh cylinder 1.1 and then flows into the annular return water groove 4, and then is discharged through the drainage pipe.

[0037] In an implementation manner, a sea fishing tuna sea temporary culture device further includes a return water pool (not shown in the figure). The other end of the drainage pipe is connected to the return water pool. The water inlet of the water pump is communicated with the return water pool through an inlet pipe. In this way, during the working process of the water pump, the water pump pumps the seawater in the return water pool into the annular cavity 2.1. At the same time, the water overflowing from the culture barrel 1 overflows through the annular mesh cylinder 1.1 and then flows into the annular return water groove 4, and then is discharged back to the return water pool through the drainage pipe to form a cycle.

[0038] In another embodiment, the water inlet of the water pump is connected to a water inlet pipe, and the water inlet pipe is directly communicated with the seawater in the sea. The other end of the drain pipe directly discharges the seawater back into the sea. In this way, during the operation of the water pump, the water pump pumps the seawater in the sea into the annular cavity 2.1 through the water inlet pipe. At the same time, after the water overflowing from the breeding barrel 1 overflows through the annular mesh cylinder 1.1, it will flow into the annular return water tank 4 and then be discharged back into the sea through the drain pipe.

[0039] Furthermore, a water temperature sensor is also provided in the breeding barrel 1 to monitor the water temperature in the breeding barrel 1 in real time through the temperature sensor.

[0040] Furthermore, as Figure 1 shown, a circular flexible layer 1.2 is provided on the inner side wall of the breeding barrel 1. Bar-shaped through openings 2.4 corresponding to the bar-shaped water spray openings 2.2 one by one are provided on the circular flexible layer 1.2, and the shape of the bar-shaped through openings 2.4 is the same as that of the bar-shaped water spray openings 2.2. The function of the circular flexible layer 1.2 is that once the juvenile tuna hits (touches) the breeding barrel 1, it can play a buffering role and effectively prevent the problem of the juvenile tuna being bruised, stunned or killed.

[0041] In one example, the circular flexible layer 1.2 is composed of a sponge layer. The thickness of the sponge layer is 5-10 cm. The sponge has sufficient buffering effect and can effectively prevent the problem of the juvenile tuna being bruised, stunned or killed.

[0042] In another example, the circular flexible layer 1.2 is composed of an elastic rubber layer. The thickness of the elastic rubber layer is 5-10 cm. The elastic rubber layer has sufficient buffering effect and can effectively prevent the problem of the juvenile tuna being bruised, stunned or killed.

[0043] Specific Embodiment 2, as Figure 2 shown, a sea fishing tuna offshore temporary culture device includes a breeding barrel 1, a light-shielding upper cover 3 and an anti-collision device 2.

[0044] An upwardly extending annular mesh cylinder 1.1 is provided at the edge of the upper port of the breeding barrel 1. The height of the annular mesh cylinder 1.1 is not less than 20 cm. In this embodiment, the height of the annular mesh cylinder 1.1 is 20-50 cm. The breeding barrel 1 is a cylindrical barrel or a breeding barrel 1 with a square or other polygonal cross-section.

[0045] The light-shielding upper cover 3 is arranged above the upper port of the breeding barrel 1. The light-shielding upper cover 3 is fixed above the breeding barrel 1. The annular mesh cylinder 1.1 is located inside the light-shielding upper cover 3. The light-shielding upper cover 3 shields the upper port of the breeding barrel 1 to form a dim environment inside the breeding barrel 1. In this way, the night survival environment of tuna can be simulated inside the breeding barrel 1, reducing its metabolic level to slow down the swimming speed of the juvenile tuna temporarily cultured in the breeding barrel 1. In addition, the light-shielding upper cover 3 can also play a role in preventing tuna from jumping out.

[0046] In one example, a conical cover extending obliquely downward toward the outside of the culture barrel 1 is provided at the edge of the light-shielding upper cover 3, and the annular net cylinder 1.1 is located inside the conical cover.

[0047] In another example, a cylindrical light-shielding cover edge extending downward is provided at the edge of the light-shielding upper cover 3, and the annular net cylinder 1.1 is located inside the cylindrical light-shielding cover edge.

[0048] The anti-collision device 2 includes a water pump, a controller, a camera device, an annular cavity 2.1 and a plurality of strip-shaped water spray nozzles 2.2 provided on the inner side wall of the culture barrel 1. The camera device is connected to the controller through a signal line. The water pump is connected to the controller through a signal line. The camera device includes one or more cameras, and the cameras are located above the culture barrel 1. The camera device monitors the tuna in the culture barrel 1 in real time and transmits it to the controller. In this embodiment, the camera is a night vision camera and / or an infrared camera.

[0049] The annular cavity 2.1 is provided inside the side wall of the culture barrel 1 and surrounds the culture barrel 1. In this embodiment, the annular cavity 2.1 extends upward from the bottom of the culture barrel 1 to the upper part of the culture barrel 1. The water level in the culture barrel 1 is higher than the highest position of the annular cavity 2.1.

[0050] The strip-shaped water spray nozzles 2.2 are communicated with the annular cavity 2.1. The strip-shaped water spray nozzles 2.2 are uniformly distributed in sequence along the bottom edge of the culture barrel 1. The strip-shaped water spray nozzles 2.2 are distributed in an up-and-down extension. The strip-shaped water spray nozzles 2.2 extend upward from the bottom of the culture barrel 1. In this embodiment, the upper end of the strip-shaped water spray nozzles 2.2 extends to the upper part of the culture barrel 1.

[0051] In one example, the strip-shaped water spray nozzles 2.2 are linear, that is, the strip-shaped water spray nozzles 2.2 extend in the vertical direction.

[0052] In another example, the strip-shaped water spray nozzles 2.2 are oblique linear, that is, the strip-shaped water spray nozzles 2.2 are inclined from bottom to top.

[0053] In the third example, the strip-shaped water spray nozzles 2.2 are spiral linear.

[0054] When the distance between the position of the tuna in the culture barrel 1 photographed by the camera device and the inner wall of the culture barrel 1 is less than the set value L (the set value L is 10-20 cm in this embodiment), the controller controls the water pump to work. The water pump injects the water from the outside into the annular cavity 2.1 and sprays it into the culture barrel 1 through the strip-shaped water spray nozzles 2.2, and drives the tuna away from the inner wall of the culture barrel 1 through the water flow to prevent it from touching the wall of the culture barrel 1.

[0055] A kind of sea fishing tuna offshore temporary culture device of this embodiment is arranged on a ship.

[0056] The specific operation of a kind of offshore temporary breeding device for sea - fishing tuna in this embodiment is as follows. The juvenile tuna are temporarily bred in the breeding barrel 1. The camera device monitors the tuna in the breeding barrel 1 in real - time and transmits the information to the controller.

[0057] In this embodiment, by simulating the night survival environment of tuna in the breeding barrel 1, the metabolic level of juvenile tuna is reduced, thereby effectively slowing down the swimming speed of the juvenile tuna temporarily bred in the breeding barrel 1.

[0058] During the swimming process of the juvenile tuna (juvenile tuna generally swim in a circular motion in the breeding barrel 1), when the camera device captures that the distance between the position of the tuna in the breeding barrel 1 and the inner wall of the breeding barrel 1 is less than the set value L (for example, the set value L is 15 cm), the controller controls the water pump to work. The water pump injects external water into the annular cavity 2.1 and sprays it into the breeding barrel 1 through each strip - shaped water - spraying port 2.2. (Since the water level in the breeding barrel 1 is higher than the highest position of the annular cavity 2.1 and the annular cavity 2.1 is filled with water, when the water pump injects external water into the annular cavity 2.1, it can quickly spray out into the breeding barrel 1 through each strip - shaped water - spraying port 2.2. More importantly, because the night survival environment of tuna is simulated in the breeding barrel 1, the metabolic level of juvenile tuna is reduced, effectively slowing down the swimming speed of the juvenile tuna temporarily bred in the breeding barrel 1. Therefore, it can avoid the too - fast swimming speed of juvenile tuna and prevent the anti - impact device 2 from failing to respond in time), and a water flow from the barrel wall to the center direction is formed in the breeding barrel 1 in time. The water flow drives the juvenile tuna away from the inner wall of the breeding barrel 1 to prevent the juvenile tuna from touching the wall of the breeding barrel 1. Thus, during the process of transporting the juvenile tuna from the sea back to the breeding base, the problem of the fish body of the juvenile tuna being scratched and bruised by the inner wall of the temporary breeding device can be effectively reduced, thereby improving the survival rate of the juvenile tuna during the offshore transportation process.

[0059] During the operation of the water pump, the water overflowing from the breeding barrel 1 overflows through the annular mesh cylinder 1.1, which does not affect the activities of the juvenile tuna and can also prevent the juvenile tuna from escaping.

[0060] Specifically, as Figure 2 shown, a kind of offshore temporary breeding device for sea - fishing tuna further includes a drainage pipeline. An annular water - return groove 4 with an upward - opening is arranged on the upper part of the outer wall of the breeding barrel 1. The water overflowing from the upper port of the breeding barrel 1 flows into the annular water - return groove 4, and one end of the drainage pipeline is communicated with the bottom of the annular water - return groove 4. In this way, during the operation of the water pump, the water overflowing from the breeding barrel 1 through the annular mesh cylinder 1.1 will flow into the annular water - return groove 4 and then be discharged through the drainage pipeline.

[0061] In one embodiment, a sea fishing tuna offshore temporary culture device further includes a water return pool. The other end of the drainage pipe is connected to the water return pool. The water inlet of the water pump is communicated with the water return pool through a water inlet pipe. Thus, during the operation of the water pump, the water pump pumps the seawater in the water return pool into the annular cavity 2.1. At the same time, the water overflowing from the culture barrel 1 will flow into the annular water return groove 4 after overflowing through the annular mesh cylinder 1.1, and then be discharged back to the water return pool through the drainage pipe, forming a cycle.

[0062] In another embodiment, the water inlet of the water pump is connected with a water inlet pipe, and the water inlet pipe is directly communicated with the seawater in the sea. The other end of the drainage pipe directly discharges the seawater back into the sea. Thus, during the operation of the water pump, the water pump pumps the seawater in the sea into the annular cavity 2.1 through the water inlet pipe. At the same time, the water overflowing from the culture barrel 1 will flow into the annular water return groove 4 after overflowing through the annular mesh cylinder 1.1, and then be discharged back into the sea through the drainage pipe.

[0063] Furthermore, a feeding port is formed on the light-shielding upper cover 3. A cover plate that can be opened is provided on the feeding port. Thus, the caught juvenile tuna can be put into the culture barrel 1 through the feeding port for temporary culture, and the bait can also be put through the feeding port, while minimizing the impact on the simulated night survival environment of the tuna in the culture barrel 1.

[0064] Furthermore, a water temperature sensor is also provided in the culture barrel 1, and the water temperature in the culture barrel 1 is monitored in real time through the temperature sensor.

[0065] Furthermore, as Figure 2 shown, a circular flexible layer 1.2 is provided on the inner side wall of the culture barrel 1. Bar-shaped through openings 2.4 corresponding to the bar-shaped water spray openings 2.2 one by one are provided on the circular flexible layer 1.2, and the shape of the bar-shaped through openings 2.4 is the same as that of the bar-shaped water spray openings 2.2. The function of the circular flexible layer 1.2 is that once the juvenile tuna hits (touches) the culture barrel 1, it can play a buffering role and effectively prevent the problem of the juvenile tuna being bruised, stunned or killed.

[0066] In one example, the circular flexible layer 1.2 is composed of a sponge layer. The thickness of the sponge layer is 5-10 cm. The sponge has sufficient buffering effect and can effectively prevent the problem of the juvenile tuna being bruised, stunned or killed.

[0067] In another example, the circular flexible layer 1.2 is composed of an elastic rubber layer. The thickness of the elastic rubber layer is 5-10 cm. The elastic rubber layer has sufficient buffering effect and can effectively prevent the problem of the juvenile tuna being bruised, stunned or killed.

[0068] Specific Embodiment 3. The rest of the structure of this embodiment refers to Specific Embodiment 1 or Specific Embodiment 2, and the difference is that In this embodiment, asFigure 3 As shown, a plurality of partition plates 2.3 are provided in the annular cavity 2.1. The partition plates 2.3 are vertically distributed on the side. Each partition plate 2.3 divides the annular cavity 2.1 into several single cavities 2.1.1 that are sequentially distributed around the aquaculture barrel 1. Each single cavity 2.1.1 is respectively communicated with the water pump outlet through a water injection pipeline, and an electromagnetic valve is provided on each water injection pipeline. In this embodiment, a plurality of strip-shaped water spray nozzles 2.2 are provided on the side wall of the aquaculture barrel 1 corresponding to each single cavity 2.1.1.

[0069] The specific working process of a kind of offshore temporary culture device for sea fishing tuna in this embodiment is as follows. The juvenile tuna is temporarily cultured in the aquaculture barrel 1, and the controller is transmitted with the image of the tuna in the aquaculture barrel 1 in real time through the imaging device. During the swimming process of the juvenile tuna (the juvenile tuna generally swims annularly in the aquaculture barrel 1), when the distance between the position of the tuna in the aquaculture barrel 1 captured by the imaging device and the inner wall of the aquaculture barrel 1 is less than the set value L (for example, the set value L is 15 cm), the controller controls the water pump to work, and at the same time controls the electromagnetic valve on the water injection pipeline communicating with the corresponding single cavity 2.1.1 to open. The water pump injects external water into the corresponding single cavity 2.1.1, and then sprays it into the aquaculture barrel 1 through each strip-shaped water spray nozzle 2.2 communicating with the single cavity 2.1.1 (since the water level in the aquaculture barrel 1 is higher than the highest position of the annular cavity 2.1 and the annular cavity 2.1 is filled with water, when the water pump injects external water into the annular cavity 2.1, it can quickly spray into the aquaculture barrel 1 through each strip-shaped water spray nozzle 2.2. At the same time, since the water pump injects external water into the corresponding single cavity 2.1.1, the response speed of the water flow formation can be further improved). A water flow from the barrel wall to the center direction is formed in the aquaculture barrel 1 in time, and the juvenile tuna is driven away from the inner wall of the aquaculture barrel 1 by the water flow in time, further preventing the juvenile tuna from touching the wall of the aquaculture barrel 1, effectively reducing the problem that the fish body of the juvenile tuna is scratched and bruised by the inner wall of the temporary culture device, and thus improving the survival rate of the juvenile tuna during the offshore transportation process.

[0070] The above is only a preferred embodiment of the present invention, and does not impose any limitation on the present invention. Any simple modification, change, and equivalent transformation made to the above embodiment according to the technical essence of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. An offshore temporary breeding device for sea fishing tuna, characterized in that Comprising: A breeding barrel, with an upward-extending annular net cylinder provided at the edge of its upper port; An anti-collision device, comprising: A controller and a camera device, the camera device monitors the tuna in the breeding barrel in real time and transmits it to the controller; An annular cavity, arranged inside the side wall of the breeding barrel and surrounding the breeding barrel, the water level in the breeding barrel is higher than the highest position of the annular cavity; A number of strip-shaped water spray nozzles arranged on the inner side wall of the breeding barrel, the strip-shaped water spray nozzles are communicated with the annular cavity, each strip-shaped water spray nozzle is evenly distributed in sequence along the bottom edge of the breeding barrel, and the strip-shaped water spray nozzles extend upward from the bottom of the breeding barrel; A water pump, the outlet of the water pump is communicated with the annular cavity.

2. The offshore temporary culture device for tuna in sea fishing according to claim 1, characterized in that When the distance between the position of the tuna in the breeding barrel captured by the camera device and the inner wall of the breeding barrel is less than the set value L, the controller controls the water pump to work, the water pump injects the external water into the annular cavity, and sprays it into the breeding barrel through each strip-shaped water spray nozzle, and drives the tuna away from the inner wall of the breeding barrel through the water flow to prevent it from touching the wall of the breeding barrel.

3. The offshore temporary breeding device for tuna fishing according to claim 1, characterized in that, A circular flexible layer is provided on the inner side wall of the breeding barrel, strip-shaped through openings corresponding to the strip-shaped water spray nozzles one by one are provided on the circular flexible layer, and the shape of the strip-shaped through openings is the same as that of the strip-shaped water spray nozzles.

4. A tuna sea - fishing and offshore temporary - raising device according to claim 1 or 2 or 3, characterized in that, It further includes a light-shielding upper cover, which is arranged above the upper port of the breeding barrel to block the upper port of the breeding barrel to form a dim environment inside the breeding barrel.

5. The offshore temporary culture device for tuna in sea fishing according to claim 4, characterized in that, A feeding port is provided on the light-shielding upper cover, and a cover plate that can be opened is provided on the feeding port.

6. The offshore temporary culture device for tuna in sea fishing according to claim 1 or 2 or 3, characterized in that, It further includes a drainage pipe, an upward-opening annular water return groove is provided on the upper part of the outer wall of the breeding barrel, the water overflowing from the upper port of the breeding barrel flows into the annular water return groove, and one end of the drainage pipe is communicated with the bottom of the annular water return groove.

7. The offshore temporary culture device for tuna in sea fishing according to claim 6, characterized in that, It further includes a water return pool, the other end of the drainage pipe is connected to the water return pool, and the water inlet of the water pump is communicated with the water return pool through a water inlet pipe.

8. A sea bass sea - keeping device according to claim 1 or 2 or 3 or 4, characterized in that, A number of partition plates are provided in the annular cavity, dividing the annular cavity into a number of single cavities distributed in sequence around the breeding barrel, each single cavity is respectively communicated with the outlet of the water pump through a water injection pipe, and electromagnetic valves are provided on each water injection pipe.

9. A sea - fishing tuna offshore temporary - raising device according to claim 1 or 2 or 3 or 4, characterized in that, The annular cavity extends upward from the bottom of the breeding barrel to the upper part of the breeding barrel.

10. A tuna sea - fishing and offshore temporary - raising device according to claim 1 or 2 or 3 or 4, characterized in that, The strip-shaped water spray nozzles are linear or oblique-linear or spiral-linear.

Images