Tuna fishing equipment, tuna fishing method, tuna distribution method and tuna distribution system

Abstract

To provide a tuna fishing method capable of catching high quality tuna without causing "burnt" fish. [Solution] The present invention is a tuna fishing method for catching tuna T using a tuna fishing device 1 that includes a first float 11, a second float 12 that is substantially cylindrical and has a groove 121 provided around the entire circumferential direction in its axial center and a through hole 122 provided axially in its radial center, and a fishing line 13 with a fishhook 14 at one end, the fishing line 13 being wound around the groove 121 of the second float 12 and then passing through the through hole 122 of the second float 12 to be attached to the first float 11. In the tuna fishing method, the first float 11 and the second float 12 are floated on the water surface with a predetermined distance between them, and when the tuna T is caught on the fishhook 14, the second float 12 sinks in the water, and the tuna T is allowed to swim while the second float 12 is submerged, and when the second float 12 rises to the water surface, the tuna T is pulled up onto the ship S.

Description

[Technical Field]

[0001] The present invention relates to a tuna fishing device, a tuna fishing method using the tuna fishing device, and a tuna distribution method and tuna distribution system for distributing tuna caught using the tuna fishing method. [Background technology]

[0002] In tuna fishing, when a tuna caught on a hook is brought on board, the tuna moves violently to try to escape the hook. When the tuna moves violently, its body temperature and lactic acid level rise, causing the tuna to become "burned" after being caught. When "burned" occurs, the tuna loses its natural red color, turns white, becomes dry in texture, and has a strong sour taste, reducing its commercial value.

[0003] To solve this problem, a device has been developed for a pole-and-line fishing machine that uses an electric drive motor to catch tuna. An electromagnetic clutch is installed between the drive motor and the rotating drum that reels in the fishing line, causing the rotating drum to rotate forward in the winding direction until the load reaches the transmission torque, and then causing the rotating drum to rotate backward in the unwinding direction when the load exceeds the transmission torque (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2017-221112 Summary of the Invention [Problem to be solved by the invention]

[0005] However, when fishing without using an electric drive motor, the fisherman tries to reel in the tuna before the fishing line is cut, and the tuna fights back, moving violently around, resulting in "burning," which remains a problem.

[0006] The present invention has been made to solve the above problems, and aims to provide a tuna fishing device that can catch high-quality tuna without causing burnt tuna even when the tuna is caught by hand, and a tuna fishing method that uses said tuna fishing device. Another aim of the present invention is to provide a tuna distribution method and tuna distribution system that can distribute high-quality tuna caught using said tuna fishing method while maintaining its high quality. [Means for solving the problem]

[0007] Item 1. First float and, a second float having a substantially cylindrical shape; a fishing line having a fishing hook at one end; The second float has a recessed groove provided in an axial center portion over the entire circumferential direction, and a through hole provided in a radial center portion along the axial direction, A tuna fishing device characterized in that the fishing line is wound around the groove portion of the second float, then passes through the through hole of the second float and is attached to the first float.

[0008] Item 2. A tuna fishing method for catching tuna using the tuna fishing device according to Item 1, The first float and the second float are floated on the water surface with a predetermined distance between them, When a tuna is caught on the fishhook and pulls the fishing line, the fishing line wound around the groove of the second float stretches, and the second float comes into contact with the first float and sinks into the water. While the second float is submerged in water, the tuna is allowed to swim, This is a tuna fishing method characterized by pulling the tuna onto the boat when the tuna's pull weakens and the second float rises to the water surface.

[0009] Item 3. A tuna fishing method according to Item 2, characterized in that the tuna undergoes nerve-killing treatment in water before being hauled onto the vessel.

[0010] Item 4. A tuna distribution method for distributing tuna caught using the tuna fishing method according to item 2 or 3, The processing process involves cutting up the caught tuna and processing it into fillets. A grade determination process for determining the grade of the fence processed in the processing process; a photographing step of taking a photograph of the fences sorted in the grade determining step; a freezing step of vacuum-packing and flash-freezing the fences photographed in the photographing step; and a distribution process of distributing the tuna fillets frozen in the freezing process in a state where the photographs taken in the photography process can be viewed.

[0011] Item 5. Before the processing step, a gutting process in which the gills and internal organs of the caught tuna are removed; Item 4. The method for distributing tuna according to Item 3, further comprising a cooling step of freezing the tuna from which the gills and internal organs have been removed.

[0012] Item 6. A tuna distribution system that distributes tuna caught using the tuna fishing method described in Item 2 or 3, An imaging device that takes photos of tuna fillets that have been cut up from caught tuna and processed into fillets; a freezing device that flash freezes the photographed and vacuum-packed fences; a printing device that creates a sticker containing information about the photograph taken by the imaging device; a processing device; The processing device includes: a photo acquisition unit that acquires image data of a photo taken by the imaging device; a grade determination unit that processes the image data of the photograph acquired by the photograph acquisition unit to determine the grade of the fence; a print information creation unit that creates print information that allows confirmation of image data of the photograph taken by the imaging device, the printing device prints the print information created by the print information creation unit on a sticker sheet to create a sticker; A tuna distribution system characterized in that the tuna frozen in the freezing device is distributed with a sticker created by the printing device attached to it. [Effects of the Invention]

[0013] The tuna fishing device and tuna fishing method of the present invention make it possible to catch high-quality tuna without causing burnt spots, even when fishing by hand. Furthermore, the tuna distribution method and tuna distribution system of the present invention make it possible to distribute tuna caught in a high-quality state while maintaining that high quality. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a front view of a tuna fishing device according to an embodiment of the present invention. [Figure 2] FIG. 2 is a longitudinal sectional view of the tuna fishing device of FIG. 1. [Figure 3] FIG. 2 is a schematic diagram showing an example of a fishing method using the tuna fishing device of FIG. 1. [Figure 4] FIG. 2 is a schematic diagram showing an example of a fishing method using the tuna fishing device of FIG. 1. [Figure 5] FIG. 2 is an image diagram showing the movement of tuna in a fishing method using the tuna fishing device of FIG. 1. [Figure 6] FIG. 1 is a front view showing an example of a tuna fence caught by the tuna fishing device of the present invention. [Figure 7] 1 is a block diagram showing the configuration of a tuna distribution system according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

[0016] [Tuna fishing device] First, a tuna fishing device 1 for catching tuna T according to this embodiment will be described with reference to Figures 1 and 2. Figure 1 is a front view of the tuna fishing device 1 according to this embodiment. Figure 2 is a vertical cross-sectional view of the tuna fishing device 1 according to this embodiment.

[0017] 1 and 2, the tuna fishing device 1 of this embodiment includes a first float 11, a second float 12, and a fishing line 13 having a fishhook 14 at one end. The fishing line 13 and the fishhook 14 are the same as those typically used when catching tuna T.

[0018] The first float 11 is similar to floats generally used in longline fishing for tuna T. It is preferable that an LED (Light Emitting Diode) 15 is attached to the first float 11 so that the position of the first float 11 can be confirmed at night.

[0019] The second float 12 is made of a material generally used for floats in longline fishing for tuna T and has a generally cylindrical shape. The second float 12 has a recessed groove 121 provided around the entire circumferential direction in the axial center, and a through hole 122 provided along the axial direction in the radial center.

[0020] The fishing line 13 has a fishhook 14 attached to one end and a snap swivel 16 attached to the other end. The fishing line 13 extending from the fishhook 14 is wound around the groove 121 of the second float 12, passes through the through-hole 122 of the second float 12, and is attached to the first float 11 by the snap swivel 16 at a certain distance from the first float 11.

[0021] [Tuna fishing method] Next, a tuna fishing method for catching tuna T using the tuna fishing device 1 will be described with reference to Figs. 3 to 5. Figs. 3 and 4 are schematic diagrams showing an example of a fishing method using the tuna fishing device 1 of this embodiment. Fig. 3 shows the state immediately after the tuna T has been caught on the fishhook 14, and Fig. 4 shows the state after a certain time has passed since the tuna T was caught on the fishhook 14. Fig. 5 is an image diagram showing the movement of the tuna T in the fishing method using the tuna fishing device 1 of this embodiment.

[0022] When catching a tuna T, first, the first float 11 and the second float 12 are floated on the water surface with a predetermined distance between them, as shown in Figure 1. At this time, the fishing line 13 is wound a certain length around the groove 121 of the second float 12, and is set so that one end of the fishing line having the fishhook 14 is located at the water depth where tuna T generally swims when the first float 11 and the second float 12 float to the water surface, and the other end without the fishhook 14 passes through the through-hole 122 of the second float 12 and is attached to the first float 11 at a predetermined distance from it. In the following, a single tuna fishing device 1 will be used for explanation, but multiple tuna fishing devices 1 may be floated on the water surface in the above-mentioned state, spaced apart from each other by a predetermined distance.

[0023] In this state, the tuna T waits for the tuna T to get caught on the fishhook 14. As shown in FIG. 3, when the tuna T gets caught on the fishhook 14, the tuna T quickly pulls on the fishing line 13 wound around the second float 12. This stretches the fishing line 13 wound around the groove 121 of the second float 12, and the second float 12 comes into contact with the first float 11, causing at least the second float 12 to sink into the water. While the second float 12 is submerged in the water, the tuna T is vigorously escaping, so the tuna T is allowed to swim freely. At this time, as shown in FIG. 5, if the length of the fishing line 13 is l, the tuna T can swim freely within a cone with height h and radius r, for example, r:h:l = 3:4:5, from the second float 12, which is the starting point from which the fishing line 13 extends into the water.

[0024] The tuna T, swimming freely while still caught on the fishing hook 14, gradually becomes tired of swimming due to the buoyancy of the first float 11 and the second float 12. When the tuna T gets tired of swimming and the pulling force of the fishing line 13 of the tuna T weakens, the second float 12 repeatedly floats to the water surface and sinks underwater, and the force of the second float 12 sinking underwater gradually weakens, and the tuna T completely rises to the water surface. As shown in Figure 4, when the tuna T gets tired and the second float 12 completely rises to the water surface, the tuna T is pulled up onto the boat S. At this time, it is preferable to perform nerve-killing underwater before pulling the tuna T up onto the boat S. Specifically, with only the head of the tuna T above the water surface and the body of the tuna T still underwater, a hook is driven into the jawbone of the tuna T, and a wire is passed from the center of the tuna T's head along the spinal cord to destroy the nerves in the spinal cord, thereby performing nerve-killing underwater.

[0025] [Tuna distribution method] Next, a tuna distribution method for distributing tuna T caught using the tuna fishing method will be described with reference to Fig. 6. Fig. 6 is a front view showing an example of a fence TP for tuna T caught by the tuna fishing device 1 of this embodiment.

[0026] Tuna T caught using the above tuna fishing method and landed on vessel S is bled and then subjected to an evisceration process in which the gills and internal organs are removed. Then, a fish pen installed on vessel S is filled with iced seawater, and the eviscerated tuna T is placed in the pen. The caught tuna T is landed in this state on the same day it is caught.

[0027] The landed tuna T is immediately sterilized and washed with ozone water. The ozone water used for sterilization and washing preferably has a concentration of 1 ppm to 1.5 ppm. After that, a cooling process is carried out in which the tuna T, from which the gills and internal organs have been removed, is cooled on ice in a cooling chamber. At this time, it is preferable that the room temperature of the cooling chamber is 0°C, and the tuna T is cooled for approximately 30 hours until its core temperature reaches -1.5°C. By keeping the room temperature of the cooling chamber at 0°C, the temperature of the cooling water used to cool the tuna T does not rise, and the core temperature of the tuna T can be reliably reduced to -1.5°C in approximately 30 hours.

[0028] On the following day after the tuna T is landed, the tuna T that has been caught and cooled in a cooling room is subjected to a processing process in which it is processed into fillets TP in order to distribute the tuna T. The method of processing into fillets TP is the same as conventional known methods. Then, a grade determination process is performed in which the grade of the fillets TP processed in the processing process is determined. The grade is determined based on the quality of the flesh as a product, such as the part of the tuna T, the color of the tuna T's flesh, the proportion of "streaks," and whether or not it is "burned."

[0029] Next, a photography process is carried out in which photographs of the tuna TP sorted in the grading process are taken. Then, as shown in Figure 6, the tuna TP photographed in the photography process are vacuum-packed and flash-frozen in a freezing process. Flash-freezing is preferably alcohol brine freezing, in which the tuna TP is immersed in a pool of alcohol cooled to -30°C or below and instantly frozen by the heat conduction of the cooling water. Flash-freezing in this way prevents the tuna TP from dripping after thawing, which would cause the flavor and nutrients to leak out and result in a loss of quality.

[0030] Then, a distribution process is carried out in which the frozen bars TP are distributed in a state where the photograph taken in the photography process can be confirmed. Specifically, the photograph taken in the photography process is converted into a QR code (registered trademark), and a sticker 17 with the QR code (registered trademark) is created. The sticker 17 is then affixed to a vacuum pack VP for distribution.

[0031] Those who purchase the tuna T-shirt rack TP can check the condition of the tuna T after thawing (color of the flesh, presence of "streaks", presence of "burnt" etc.) by scanning the QR code (registered trademark), and purchase the tuna T after checking the condition of the tuna T after thawing.

[0032] [Tuna distribution system] Next, an example of a tuna distribution system 2 capable of implementing the tuna distribution method will be described with reference to Fig. 7. Fig. 7 is a block diagram showing the configuration of the tuna distribution system 2 according to this embodiment. The tuna distribution system 2 according to this embodiment distributes tuna T caught using the tuna fishing method described above. Note that the tuna distribution method described above may also be implemented without using the tuna distribution system 2 described below.

[0033] The tuna distribution system 2 includes an imaging device 21, a freezing device 22, a printing device 23, and a processing device 30. The imaging device 21, the printing device 23, and the processing device 30 are connected via a computer network such as the Internet or a WAN (Wide Area Network).

[0034] The imaging device 21 is a device that takes a photograph of a tuna T pallet TP that is formed by cutting up a caught tuna T and processing it into a pallet shape. The imaging device 21 is, for example, a digital camera.

[0035] The freezer 22 is a device that instantly freezes the photographed and vacuum-packed pallets TP. The freezer 22 is, for example, a water tank that stores alcohol cooled to -30°C or below.

[0036] The processing device 30 includes a photo acquisition unit 31, a grade determination unit 32, a print information creation unit 33, a storage unit 34, and a control unit 35.

[0037] The photo acquisition unit 31 acquires a photo taken by the imaging device 21. Image data of the acquired photo is transmitted to the grade determination unit 32 and the print information creation unit 33.

[0038] The grade determination unit 32 performs image processing on the image data of the photograph acquired by the photograph acquisition unit 31 to determine the grade of the tuna TP. Specifically, the grade determination unit 32 analyzes the part of the tuna T, the color of the flesh of the tuna T, the proportion of "streaks," and the presence or absence of "burnt" through image analysis, and determines the grade based on grade standards determined based on each analyzed condition. The determined grade information is transmitted to the print information creation unit 33.

[0039] The print information creation unit 33 creates print information that allows confirmation of image data of the photograph taken by the imaging device 21. Specifically, the print information creation unit 33 converts the image data of the photograph acquired by the photograph acquisition unit 31 into a QR code (registered trademark), and creates the QR code (registered trademark) as print information. At this time, the print information may include grade information of the tuna T determined by the grade determination unit 32.

[0040] The storage unit 34 stores various information, image data, etc. Specifically, the storage unit 34 stores image data of the photograph acquired by the photograph acquisition unit 31, grade information determined by the grade determination unit 32, print information created by the print information creation unit 33, etc. The storage unit 34 is composed of a ROM (Read Only Memory) and a RAM (Random Access Memory).

[0041] The control unit 35 is configured by a processor such as a CPU (Central Processing Unit). The control unit 35 controls the operations of the photo acquisition unit 31, the grade determination unit 32, the print information creation unit 33, and the storage unit 34 by executing a program.

[0042] The printing device 23 is a device that creates the sticker 17 that includes information about the photo taken by the imaging device 21. The printing device 23 prints the print information created by the print information creation unit 33 onto sticker paper to create the sticker 17. Specifically, the printing device 23 prints the QR code (registered trademark) created by the print information creation unit 33. The printing device 23 is, for example, a printer or a multifunction device.

[0043] Next, a method for distributing tuna T using the tuna distribution system 2 of this embodiment will be described.

[0044] First, as in the above-described tuna distribution method, tuna T is landed after undergoing an on-board evisceration process, sterilized, washed, and cooled, and then processed into fillets TP in a processing process. This processed fillet TP is photographed by an imaging device 21. Image data of the photograph is acquired by a photo acquisition unit 31 and transmitted to a grade discrimination unit 32 and a print information creation unit 33.

[0045] The grade determination unit 32 performs image processing on the image data of the photograph acquired by the photograph acquisition unit 31 and determines the grade of the tuna T. The determined grade is transmitted to the print information creation unit 33 and the user. The user classifies the tuna T fillets TP according to the determined grade. Then, the user freezes the tuna T fillets TP in the freezing device 22 in a graded state.

[0046] The print information creation unit 33 creates print information (for example, a QR code (registered trademark)) that allows confirmation of image data of the photograph acquired by the photograph acquisition unit 31. At this time, the grade information determined by the grade determination unit 32 may be included in the print information.

[0047] The print information created by the print information creation unit 33 is transmitted to the printing device 23, which then prints it on sticker paper. This creates stickers 17. The user attaches the stickers 17 created by the printing device 23 to the fences TP that have been classified into grades and frozen in the freezing device 22, and distributes them. [Example]

[0048] Next, the tuna fishing method according to the embodiment will be specifically described using an example. In this example, the quality of the flesh of the tuna T obtained by using the tuna fishing method according to the embodiment will be compared with that obtained by catching the tuna T using conventional pole-and-line fishing.

[0049] In the example, a tuna T was caught using the tuna fishing device 1 according to the above embodiment and the tuna fishing method according to the above embodiment. That is, the tuna T was allowed to swim freely for 5 to 10 minutes after it was caught on the fishhook 14, and then the tuna T was slowly pulled up onto the boat S after the positions of the first float 11 and the second float 12 became stable as shown in FIG. In the conventional example, a pole-and-line fishing rod for tuna T was used, and as soon as the tuna T was caught on the hook, the tuna T was immediately pulled up to ship S. In the examples and comparative examples, 10 tuna T were caught.

[0050] The quality of the flesh of tuna T is determined not only by the inherent characteristics of the tuna T, such as the "part," "flesh color," and "proportion of muscle," which are not affected by the fishing method of the tuna T, but also by the body temperature (blood temperature) of the tuna T immediately after catching the tuna T, which is affected by the fishing method of the tuna T. In other words, if the body temperature of the tuna T is high (e.g., 35°C to 40°C) when the tuna T is caught, the flesh of the tuna T will "burn" and the quality of the flesh will deteriorate. Therefore, the quality of the flesh of the tuna T is evaluated by measuring the temperature of the tuna T's blood during the bleeding and gutting process on board the boat. Specifically, when the large blood vessel located two veins below the gills is cut, the heart acts as a pump and the blood naturally drains. The temperature of this blood is measured. The body temperatures of 10 tuna T caught in the examples and comparative examples were measured, and the results were as follows. The measurement results are shown in Table 1.

[0051] [Table 1]

[0052] As can be seen from Table 1, in the Example, the body temperatures of all 10 tuna T were in the range of 25°C to 27°C. On the other hand, in the Comparative Example, the body temperatures of the 10 tuna T were generally above 30°C, with half in the range of 35°C to 38°C, except for one that was 28°C. In other words, it can be seen that the tuna T caught in the Comparative Example was hotter than the tuna T caught in the Example. When the tuna T caught in the Example and Comparative Example were actually butchered, it was found that the tuna T caught in the Comparative Example had a high body temperature when caught, resulting in "burnt" flesh and poor meat quality. On the other hand, the tuna T caught in the Example had not risen above its body temperature when swimming normally, and there was no "burnt" flesh in the tuna T. From this, it can be seen that by using the tuna fishing method of the present invention, tuna T can be caught without compromising the quality of the tuna T.

[0053] As described above, the tuna fishing device 1 of the present invention is provided with a first float 11 and a second float 12, and a fishing line 13 is wound around the second float 12. In the tuna fishing method of the present invention, which uses the tuna fishing device 1 of the present invention, the state of the tuna T is determined from the movement of the second float 12, and the tuna T is then caught. In other words, while the second float 12 is submerged in the water, the tuna T is allowed to swim freely, and the tuna T is caught when the second float 12 rises to the surface.

[0054] In conventional methods of catching tuna T, when the tuna T is caught on a fishing hook 14, the fisherman reels in the fishing line 13 with force to pull up the tuna T. At this time, the tuna T swims around vigorously. As a result, the body temperature of the tuna T rises, lactic acid bacteria accumulate in the flesh of the tuna T, and the flesh of the pulled-up tuna T becomes "burnt."

[0055] In the present invention, the tuna T is reeled in by observing the movement of the second float 12 and waiting until the second float 12 rises to the water surface. That is, when the tuna T is caught on the fishhook 14, the fishing line 13 wound around the second float 12 stretches, and the tuna T, while restricted by the fishing line 13, is able to swim relatively freely within the conical area shown in FIG. 5. At this time, the conical area shown in FIG. 5 is large enough for the tuna T to swim, so the tuna T feels like it is swimming in normal water, and its body temperature does not rise. Then, in the present invention, the tuna fishing device 1 has large buoyancy due to the inclusion of the first float 11 and the second float 12, and the tuna T, which swims freely even after being caught on the fishhook 14, becomes tired due to the buoyancy of the first float 11 and the second float 12. Then, when the second float 12 completely rises to the water surface, the tuna T's resistance to being reeled in is weakened, and it does not feel any discomfort being reeled in. This prevents stress from being placed on the tuna T and the body temperature of the tuna T from rising, preventing the flesh of the tuna T from becoming "burned" and reducing the quality of the tuna T.

[0056] Furthermore, in the tuna fishing method of the present invention, the tuna T is pulled up onto the boat S after nerve-killing underwater. When nerve-killing is performed on the tuna T on the boat S, the tuna T will thrash about and hit its body against the hull of the boat, causing blood to seep into the flesh, resulting in "blood splashes." However, when nerve-killing is performed underwater as in the present invention, the body of the tuna T is underwater when nerve-killing is performed, and there is nothing for the tuna T to hit even if it thrashes about, so blood splashes can be prevented, and in this respect, the quality of the tuna T can also be prevented from being reduced.

[0057] Furthermore, in the tuna distribution method and tuna distribution system 2 of the present invention, the tuna T is processed into fillets TP, the fillets TP are sorted by grade, and then photographs of the fillets TP are taken before flash-freezing. The vacuum-packed tuna T is then distributed in a state where the photograph of the fillets TP can be viewed. This allows customers to check the photograph and, before purchasing, confirm the color of the flesh of the tuna T after thawing, the presence of "streaks," the presence or absence of "burnt," etc., while the tuna T is still in its flash-frozen, vacuum-packed VP state.

[0058] In the conventional method of distributing tuna, the caught tuna (T) is frozen on the ship, and the frozen tuna is then processed into tuna strips (TP) using a cutter such as a band saw before being distributed. With frozen tuna strips (TP), it is not possible to tell whether the tuna is "burnt" or what the "streaks" are like. As a result, problems have arisen when tuna (T) is purchased and thawed, and is found to be "burnt" and unmarketable, or has an off-color flesh, or has too much "streaks" which reduces its commercial value.

[0059] In the tuna distribution method and tuna distribution system 2 of the present invention, the quality of the thawed tuna T can be confirmed by checking the photograph, and the tuna T can be distributed at a price that takes into account its commercial value after thawing.

[0060] Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications are possible without departing from the spirit of the present invention.

[0061] For example, in the above embodiment, the photograph is made into a QR code (registered trademark) so that the photograph can be viewed, but this is not necessarily the only possible configuration. For example, the photograph may be stored as a digital image on an arbitrary server, and the sticker 17 may display a URL (Uniform Resource Locator) indicating the storage location of the photograph, or a QR code (registered trademark) that can link to the URL.

[0062] Furthermore, in the above embodiment, the tuna T is moved manually between the imaging device 21 and the freezing device 22, but this configuration is not necessarily limited to this. For example, a vacuum packaging machine that automatically performs vacuum packing VP may be disposed between the imaging device 21 and the freezing device 22, and the tuna T may be automatically moved by a conveyor or the like from the imaging device 21 through the vacuum packaging machine to the freezing device 22. In this case, it is preferable to vary the destination of the tuna T depending on the grade determined by the grade determination unit 32. Furthermore, an automatic label application machine that automatically applies stickers 17 may be disposed downstream of the freezing device 22, and stickers 17 printed by the printing device 23 may be automatically applied to the tuna T frozen in the freezing device 22. [Industrial Applicability]

[0063] The tuna fishing device, tuna fishing method, tuna distribution method, and tuna distribution system of the present invention provide high-quality tuna for consumption in ordinary households, etc., and can be used by those involved in the process of catching tuna and distributing it to ordinary households, etc., and therefore have industrial applicability. [Explanation of symbols]

[0064] 1 Tuna fishing device 2 Tuna distribution system 11 First float 12 Second float 121 Groove section 122 Through hole 13 Fishing Line 14 Fishhook 17 Seals 21 Imaging device 22 Refrigeration equipment 23 Printing device 30 Processing equipment 31 Photo Acquisition Department 32 Grade Classification Department 33 Printing Information Creation Department S ship T Tuna TP Tuna Fence VP Vacuum Pack

Claims

1. The first float and a second float having a substantially cylindrical shape; a fishing line having a fishing hook at one end; The second float has a recessed groove provided in an axial center portion over the entire circumferential direction, and a through hole provided in a radial center portion along the axial direction, A tuna fishing device characterized in that the fishing line is wound around the groove portion of the second float, passes through the through hole of the second float, and is then attached to the first float.

2. A tuna fishing method for catching tuna using the tuna fishing device according to claim 1, comprising: The first float and the second float are floated on the water surface with a predetermined distance between them, When a tuna is caught on the fishhook and pulls the fishing line, the fishing line wound around the groove of the second float stretches, and the second float comes into contact with the first float and sinks into the water. While the second float is submerged in water, the tuna is allowed to swim; This tuna fishing method is characterized in that when the pulling force of the tuna weakens and the second float rises to the water surface, the tuna is pulled onto the boat.

3. 3. The tuna fishing method according to claim 2, wherein the tuna is subjected to nerve-killing in water before being pulled onto the vessel.

4. A tuna distribution method for distributing tuna caught using the tuna fishing method according to claim 2 or 3, comprising: The processing process involves cutting up the caught tuna and processing it into fillets. A grade determination process for determining the grade of the fence processed in the processing process; a photographing step of taking a photograph of the fences sorted in the grade determining step; a freezing step of vacuum-packing and flash-freezing the fences photographed in the photographing step; and a distribution process of distributing the tuna fillets frozen in the freezing process in a state where the photographs taken in the photography process can be viewed.

5. Before the processing step, a gutting process in which the gills and internal organs of the caught tuna are removed; The tuna distribution method according to claim 4, further comprising a cooling step of freezing the tuna from which the gills and internal organs have been removed.

6. A tuna distribution system that distributes tuna caught using the tuna fishing method according to claim 2 or 3, An imaging device that takes photos of tuna fillets that have been cut up from caught tuna and processed into fillets; a freezing device that flash freezes the photographed and vacuum-packed fences; a printing device that creates a sticker containing information about the photograph taken by the imaging device; a processing device; The processing device includes: a photo acquisition unit that acquires image data of a photo taken by the imaging device; a grade determination unit that processes the image data of the photograph acquired by the photograph acquisition unit to determine the grade of the fence; a print information creation unit that creates print information that allows confirmation of image data of the photograph taken by the imaging device, the printing device prints the print information created by the print information creation unit on a sticker sheet to create a sticker; A tuna distribution system characterized in that the tuna frozen in the freezing device is distributed with a sticker created by the printing device attached to it.

Images