Sedation device

Abstract

When farmed or aquaculture-raised fish, or wild fish, are caught by fishing, the safety of the workers can be ensured while the fish that have been brought in by fishing can be calmed without contact with electrodes. [Solution] The sedation device 1 is a sedation device for sedating fish F in water, and comprises a winding machine 10 that winds up a fishing line 12 to which a fishing hook 11 is attached and pulls in fish F caught on the fishing hook 11; two electrodes 20 and 21 spaced apart in a lifting area A for pulling up the fish pulled in by the winding machine 10 from the water; and an electric shocker 30 that is electrically connected to the two electrodes 20 and 21 and applies electrical energy to the two electrodes 20 and 21 to sedate the fish F in the lifting area A without contact with the two electrodes 20 and 21.

Description

Technical Field

[0001] The present invention relates to a calming device for calming fish in water.

Background Art

[0002] As devices for calming fish in water, Patent Documents 1 to 3 describe the following contents.

[0003] Patent Document 1 discloses a calming device for small fish (such as horse mackerel and mackerel) having a net part (a tamo net) (2) with an electrode function capable of energizing fish (F) in water (12), a counter electrode (3) capable of being energized with respect to the net part (2), and a power source (4) for energizing the net part (2) and the counter electrode (3).

[0004] Patent Document 2 includes a pair of counter electrodes (3a, 3b) disposed opposite to each other in seawater, and a pulse generation unit (4) for applying pulse electric energy to the counter electrodes (3a, 3b). A device for calming a fish (5) by applying pulse electric energy from the width direction of the fish (5) to the fish (5) located in the opposing region of the counter electrodes (3a, 3b) in a non-contact state with the counter electrodes (3a, 3b) is disclosed. A fish calming device in which pulse electric energy is applied in a state where only the head of the fish body of the fish (5) is located in the opposing region of the counter electrodes (3a, 3b) is disclosed.

[0005] Patent Document 3 discloses a fishing method in which an inverter control circuit (5) is connected to a power supply device (4) equipped on a fishing boat (1), a coated electric wire (52) from this control circuit (5) is run along a guiding wire, a fishing hook (3) is attached to the tip, and when a fish (6) is hooked on the fishing hook (3), an electric circuit is closed to put the fish (6) in a suspended animation state and lift it onto the boat.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

[0007] When farmed or raised fish, or wild fish, were harvested by fishing, workers would use an electric rod to draw the fish in and then electrocute them to sedate them. However, because workers approached the fish in the water after they had been drawn in, there was a risk that the fishing line or hook could break or come loose, causing the line or hook to fly towards the worker at high speed. In cases where the fish were not fully sedated, the worker could be injured by the fish's struggles, or in rough seas, the worker could fall into the water.

[0008] Furthermore, the method of directly contacting the fish with the electric rod mentioned above raised concerns about quality degradation due to the fish's body temperature and lactic acid levels.

[0009] The sedation device disclosed in Patent Document 1 targets small fish such as horse mackerel and mackerel, and is not used for fishing. Therefore, the above-mentioned problems do not exist in Patent Document 1.

[0010] Furthermore, the fish sedation device disclosed in Patent Document 2 applies electrical energy to fish passing through a waterway and does not involve catching fish by fishing. Therefore, the above-mentioned problems do not exist in Patent Document 2 either. Also, Patent Document 2 requires the provision of a waterway in order to guide the fish to the counter electrodes (3a, 3b).

[0011] Furthermore, the fishing method disclosed in Patent Document 3 involves applying electrical energy to the fishing hook, which raises concerns about a potential deterioration in the quality of fish that come into direct contact with the hook.

[0012] Therefore, the purpose of this disclosure is to provide a sedation device that can sedate fish that have been attracted by fishing without contact with electrodes, while ensuring the safety of workers when farmed or raised fish or wild fish are caught by fishing. [Means for solving the problem]

[0013] The sedation device of this disclosure is a sedation device for sedating fish in water, A winding machine that winds up a fishing line to which a fishing hook is attached and pulls in fish caught on the fishing hook, Two electrodes are provided at intervals in the lifting area for lifting the fish that have been pulled in by the winding machine out of the water, The system includes an electric shocker that is electrically connected to the two electrodes and applies electrical energy to the two electrodes to calm the fish in the lifting area without contact with the two electrodes.

[0014] Furthermore, the floating body with a sedation device of this disclosure is The sedation device described above, The system comprises a floating body on which the sedation device is installed and which has a place on which fish that have been sedated by the sedation device are placed. [Effects of the Invention]

[0015] According to this disclosure, when farmed or raised fish, or wild fish, are caught by fishing, it is possible to calm the fish that have been attracted by fishing without contact with electrodes, while ensuring the safety of the workers. As a result, unlike methods that involve directly contacting fish with an electric rod to tranquilize them, workers do not need to approach the fish in the water, thus ensuring worker safety even if the fishing line breaks or the hook comes loose. Furthermore, even if the tranquilization is incomplete and the fish struggles, workers do not need to approach the fish in the water during the tranquilization process, thus preventing injuries from such struggles. In addition, since it is not necessary to approach the fish in the water to tranquilize them, workers can be prevented from falling into the water even in rough seas.

Brief Description of the Drawings

[0016] [Figure 1] It is a diagram showing a boat with a calming device and a fish trap. [Figure 2] It is a diagram showing a raft with a calming device and a fish trap. [Figure 3] It is a diagram showing a boat with a calming device for fishing natural fish using a longline. [Figure 4] It is a schematic plan view showing the calming device mounted on the boat. [Figure 5A] It is a diagram showing the electrode 20. [Figure 5B] It is a diagram showing the electrode 21. [Figure 6] It is a schematic side view showing the calming device mounted on the boat. [Figure 7] It is a photograph of the frame of the calming device and the electrodes suspended from the frame. [Figure 8] It is a diagram showing the positions of the electrodes 20 and 21 in the lifting area A. [Figure 9] It is a photograph showing the settings and output values of the electric shocker according to the embodiment.

Modes for Carrying Out the Invention

[0017] Hereinafter, various embodiments will be described with reference to the accompanying drawings. In the drawings, the same reference numerals are assigned to common components. Also, note that components shown in one drawing may be omitted in another drawing for convenience of explanation. Furthermore, note that the attached drawings are not necessarily drawn to an exact scale.

[0018] As shown in FIG. 1, the calming device 1 of the present embodiment is mounted on a floating body (for example, the boat 100). That is, the boat 100 is a boat 100 with a calming device. The boat 100 approaches the fish trap 200, anchors, and performs operations such as transporting the fish F caught from the fish trap 200.

[0019] For example, farmed tuna weighing 50kg to 70kg are raised in cage 200. The fish species F raised in cage 200 are not limited to farmed tuna; they may also be livestock farmed tuna. Furthermore, the fish species F raised in cage 200 are not limited to tuna; they may also be amberjack, yellowtail, sea bream, striped jack, etc. The types of tuna (tuna species) raised in cage 200 include bluefin tuna, southern bluefin tuna, bigeye tuna, yellowfin tuna, and albacore tuna. In addition, the size of the tuna raised in cage 200 is not limited to 50kg to 70kg; it may be 30kg to 100kg, or less than 50kg, or more than 70kg.

[0020] In this embodiment, the boat 100 is moored close to the fish farm 200, but depending on the environment in which the fish farm 200 is installed, a floating structure such as a raft 300 may be installed close to the fish farm 200, as shown in Figure 2. For example, if the fish farm 200 is installed in an environment with strong waves, the boat 100 is moored near the fish farm 200 and the fish are pulled from the fish farm 200 to the boat 100, as shown in Figure 1. On the other hand, if the fish farm 200 is installed in an environment with calm waves, the raft 300 may be installed near the fish farm 200 and the fish are pulled from the fish farm 200 to the raft 300, as shown in Figure 2. In this case, the calming device 1 is installed on the raft 300.

[0021] Furthermore, while the vessel 100 in this embodiment is a vessel that anchors near the fish farm 200 and pulls up fish F from the fish farm 200, the vessel 100 in this embodiment may also be a vessel that pulls up wild fish F using longlines or the like, as shown in Figure 3.

[0022] As shown in Figure 4, the sedation device 1 is mounted on the ship 100. The sedation device 1 mainly consists of a winding machine 10 for winding up the fishing line 12, two electrodes 20 and 21 installed in or on the water surface, an electric shocker 30 for delivering an electric shock to the fish F, a frame 40 fixed to the ship 100, and a battery 50 which is the power source for the electric shocker 30.

[0023] The reel 10 is a device that winds up a fishing line 12 with a fishing hook 11 attached to its end. Fish bait (for example, saury or horse mackerel) is attached to the fishing hook 11, and the bait attached to the fishing hook 11 is put into the fish tank 200. The fish F in the fish tank 200 consumes the bait attached to the fishing hook 11, and the fish F gets caught on the fishing hook 11. The reel 10 winds up the fishing line 12 with the fish F caught on it, pulling the fish F out of the water to the lifting area A. The reel 10 further winds up the fishing line 12 with the fish F caught on it, placing the fish F from the lifting area A onto the deck 101 of the ship 100.

[0024] The timing and speed at which the winding machine 10 winds up the fishing line 12 are adjusted as needed by the workers on the ship 100. In addition, when pulling up the fish F from the lifting area A, the workers provide support as needed.

[0025] Once the fish F is brought aboard ship 100, workers perform procedures such as bleeding the fish F and removing its gills and internal organs.

[0026] Furthermore, the boat 100 is equipped with a bait dispenser (not shown), which dispenses bait into the fish pen 200. The bait attached to the fishing hook 11 is then dispensed by the workers to the location where the bait dispenser dispenses the bait and in the vicinity thereof. As a result, the bait attached to the fishing hook 11 is mixed in with the bait dispensed from the bait dispenser and is consumed by the fish F.

[0027] Lifting area A is the area with hatching in Figure 4. In this embodiment, lifting area A is the area demarcated by the frame 40, which will be described later and fixed to the ship 100, when viewed in plan. Lifting area A faces the opening 102 through which the fish F pass when placed from the water onto the deck 101 of the ship 100. A wall 103 of approximately 1.0 m is provided around the deck 101 of the ship 100, but in order to lift the fish F from the water and place it on the deck 101, it is necessary to overcome the wall 103. However, by providing the opening 102, it is not necessary to lift the fish F at the height of the wall 103, and the fish F can be placed on the deck 101 from the water through the opening 102.

[0028] Lifting area A is a rectangular area (it may be a square or a rectangle) with an area of ​​approximately 1.0m x 1.0m. The area of ​​lifting area A is not limited to approximately 1.0m x 1.0m, nor is the shape of lifting area A limited to a rectangle. For example, the area and shape of lifting area A may be changed depending on the type and size of the fish to be caught.

[0029] The electrode 20 is, for example, an anode and is electrically connected to the electric shocker 30 via a power cable 31. The electrode 20 is suspended from the frame 40 (extension portion 41 (see Figures 6 and 7)) and is mounted on the frame 40 (extension portion 41 (see Figures 6 and 7)) so as to be movable in the direction toward the ship 100 (direction A1 in Figure 4) and in the direction toward the ship 100 (direction A2 in Figure 4).

[0030] Electrode 21 is, for example, a cathode and is electrically connected to the electric shocker 30 via a power cable 32.

[0031] The electric shocker 30 is a device that applies electrical energy to electrodes 20 and 21 to deliver a non-contact electric shock to fish F in the water between electrodes 20 and 21 or to fish F approaching electrodes 20 and 21. Since electrodes 20 and 21 are non-contact with the fish F, it is possible to prevent damage to the fish F caused by direct contact with electrodes 20 and 21. In addition, by delivering an electric shock to the fish F, the electric shocker 30 can prevent the fish F from thrashing around, thereby suppressing the accumulation of lactic acid in the fish F caused by thrashing. A battery 50 is connected to the input of the electric shocker 30, and the electrodes 20 and 21 described above are connected to the output of the electric shocker 30.

[0032] Although not shown in the diagram, the electric shocker 30 includes a seawater detection sensor, a hand switch, an overcurrent stop sensor, a lamp, and a buzzer. The seawater detection sensor detects when electrodes 20 and 21 are submerged in water. The hand switch is for applying electrical energy to electrodes 20 and 21. When the fish F is pulled to the lifting area A by the winding machine 10, the worker operates the hand switch to apply electrical energy to the fish F in the lifting area A. If the seawater detection sensor does not detect that electrodes 20 and 21 are submerged in water, electrodes 20 and 21 will not be energized even if the hand switch is operated. The overcurrent stop sensor detects an overcurrent and stops the output of electrical energy. The lamp and buzzer indicate with light and sound whether or not electrical energy is being output.

[0033] Battery 50 is the power source for the electric shocker 30.

[0034] As shown in Figure 5A, the electrode 20 is an electrode rod including a rod-shaped body 20a and a sphere 20b attached to the tip of the body 20a. A float 60 is attached to the body 20a of the electrode 20 to make the electrode 20 float near the water surface. As a result, the electrode 20 floats near the water surface. Therefore, the sphere 20b attached to the tip of the body 20a is located below the water surface.

[0035] As shown in Figure 5B, the electrode 21 is a cylindrical metal (e.g., stainless steel) component, and the entire cylindrical component functions as an electrode when the power cable 32 is electrically connected to it. The power cable 32 is introduced into the cylindrical electrode 21 from the outside through a hole (not shown), and each of the branched power cables 32 (32a and 32b) inside is physically and electrically fixed to the inner surface of the cylindrical electrode 21 by bolts 33.

[0036] Frame 40 is fixed to the top of a wall 103 at a predetermined height in which the opening 102 of the ship 100 is formed. Frame 40 extends from the top of the wall 103 away from the ship 100 and extends downward at its tip. Transparent films 43 are suspended from two extending portions 41 of frame 40 to prevent fishhooks 11 that have come off the fish F or broken fishing lines 12 from hitting workers working near the opening 102. In addition, transparent films 44 and protective nets 45 are attached to the tip portion 42 that extends downward from the tip of the extending portion 41 to prevent fishhooks 11 that have come off the fish F or broken fishing lines 12 from hitting workers working near the opening 102.

[0037] As shown in Figures 6 and 7, the length of the extension portion 41 of the frame 40 in the direction approaching the ship 100 (A1) or in the direction away from the ship 100 (A2) is approximately 1.08 m, and the length between the two extension portions 41 is approximately 0.92 m. In this embodiment, the lifting area A is demarcated by the frame 40. That is, the frame 40 is arranged to surround the lifting area A. The length of the extension portion 41 is not limited to approximately 1.08 m, and the length of the tip portion 42 (between the two extension portions 41) is not limited to approximately 0.92 m. Also, the shape of the frame 40 when viewed in plan is not limited to a rectangle. For example, the length and shape of the extension portion 41 and tip portion 42 of the frame 40 may be changed according to the type and size of the fish to be caught.

[0038] Furthermore, a guide 70 is provided near the opening 102 of the boat 100 to support the fishing line 12 that is unwound from the winding machine 10. The guide 70 is installed so that the fishing line 12 hangs down on the water surface at a distance from the boat 100. The three directions on which the fishing line 12 is supported by the guide 70 are each made up of cylindrical members so that the surface in contact with the fishing line 12 is curved regardless of the direction in which the fish F caught on the fishing hook 11 moves in the water.

[0039] The deck 101 of ship 100 is approximately 0.4 m above the waterline. The extended portion 41 of frame 40 is approximately 1.44 mm above the waterline. The wall 103 of ship 100 is approximately 1.0 m high, but since an opening 102 is provided in this wall 103, workers can lift the fish F by approximately 0.4 m and place it on the deck 101 through the opening 102.

[0040] As shown in Figure 8, electrodes 20 and 21 are placed at diagonal positions within the rectangular lifting area A. By placing electrodes 20 and 21 at diagonal positions within the rectangular lifting area A, whether the fish F caught on the hook 11 is pulled towards the opening 102 of the boat 100 in the direction approaching the boat 100 (direction A1 in Figure 8) or along the side of the boat 100 (directions B1 and B2 in Figure 8), the fish F will pass between electrodes 20 and 21. Therefore, it is possible to apply electrical energy to the fish F regardless of the direction in which it is pulled. Furthermore, experiments have confirmed that even if the fish F does not pass between electrodes 20 and 21, but enters the lifting area A or comes to the vicinity of the lifting area A, it is possible to apply electrical energy to the fish F and calm it down. As current flows from one electrode through the fish F to the other electrode, the fish F receives an electric shock. Therefore, even if the fish F does not pass between electrodes 20 and 21, if the fish F enters or comes near the lifting area A, current flows through the fish F, causing it to be calmed.

[0041] The distance between electrode 20 and electrode 21 is set according to the amount of electrical energy applied to electrodes 20 and 21, and the type and size of the fish F to which the electrical energy is applied, for example, between 0.9m and 2.7m.

[0042] <Effects of this embodiment> According to the sedation device 1 or the vessel 100 with the sedation device of this embodiment, when farmed or aquaculture-raised fish or wild fish are caught by fishing, the fish that have been attracted by fishing can be sedated without contact with electrodes, while ensuring the safety of the workers.

[0043] Specifically, with the sedation device 1 or the ship equipped with the sedation device 100 of this embodiment, unlike the method of sedating fish by directly contacting them with an electric rod, the worker does not need to approach the fish F in the water. Therefore, even if the fishing line 12 breaks or the fishing hook 11 comes loose, the worker's safety can be ensured.

[0044] Furthermore, even if the sedation is incomplete and fish F thrashes about, workers do not need to approach the fish in the water during the sedation process, thus preventing injuries from such thrashing.

[0045] Furthermore, since it is not necessary to approach fish F in the water to calm them down, it is possible to prevent workers from falling into the water even in rough seas.

[0046] Furthermore, by suspending the electrodes 20 from a frame 40 extending outward from the ship 100, it becomes possible to position the electrodes 20 at a distance from the ship 100. This makes it possible to position electrodes 20 and 21 diagonally opposite each other in the lifting area A. As a result, regardless of the direction from which the fish F approaches, the two electrodes 20 and 21 can calm the fish F non-contact.

[0047] Since the frame 40 is equipped not only with film-like or mesh-like protective members (transparent film 43, transparent film 44, and protective net 45) but also with electrodes 20, there is no need to provide dedicated equipment to position the electrodes 20 at a distance from the ship 100. The electrodes 20 may be provided in dedicated equipment separate from the frame 40.

[0048] The electrode 20 is suspended from the frame 40 so as to be movable in the direction approaching the position where the fish F is to be pulled up (boat 100) and in the direction away from the position where the fish F is to be pulled up (boat 100). This makes it possible to adjust the position of the electrode 20 as needed, so that the electrode 20 can be positioned in a location that can calm the fish F without damaging it, taking into account the magnitude of the electrical energy applied between electrodes 20 and 21, the type of fish F, the size of the fish F, etc.

[0049] The lifting area A is a rectangle with an opening 102 on one side for lifting the sedated fish F, and the two electrodes 20 and 21 are positioned diagonally across the rectangular lifting area A. This makes it possible to apply electrical energy to the fish F regardless of the direction in which it is being pulled, as shown in Figure 8.

[0050] <Summary of Sedation Device 1> The sedation device 1 of this disclosure is a sedation device for sedating fish in water, A winding machine 10 that winds up the fishing line 12 to which a fishing hook is attached and pulls in the fish F caught on the fishing hook 11, Two electrodes 20 and 21 are provided spaced apart in the lifting area A, which lifts the fish F that have been pulled in by the winding machine 10 out of the water, The system includes an electric shocker 30 that is electrically connected to two electrodes 20 and 21 and applies electrical energy to the two electrodes 20 and 21 to calm the fish in the lifting area A without contact with the two electrodes 20 and 21.

[0051] Furthermore, the sedation device 1 of this disclosure is A frame 40 is provided above the lifting area A, surrounding the lifting area A. The system further comprises a film-like or mesh-like protective member (transparent film 43, transparent film 44, and protective net 45) that extends downward from the frame 40.

[0052] Furthermore, in the sedation device 1 of this disclosure, At least one of the two electrodes 20 and 21 is suspended from the frame 40 so as to be movable in the direction toward the position where the fish F is lifted and in the direction toward the direction toward the position toward the position where the fish F is lifted.

[0053] Furthermore, in the sedation device 1 of this disclosure, One of the two electrodes 20 and 21 (electrode 20) is an electrode suspended from the frame 40 and to which a float 60 is attached to position the electrode 20 near the sea surface, and the other of the two electrodes 20 and 21 (electrode 21) is a cylindrical electrode.

[0054] Furthermore, in the sedation device 1 of this disclosure, The lifting area A is a rectangle with an opening 102 on one side for lifting the sedated fish F, and the two electrodes 20 and 21 are positioned diagonally across the rectangular lifting area A.

[0055] Furthermore, the fish F targeted by the sedation device 1 of this disclosure are tuna, farmed tuna, farmed tuna weighing 30 kg to 100 kg, or farmed tuna weighing 50 kg to 70 kg.

[0056] <Summary of 100 ships equipped with sedation devices> The vessel 100 with a sedation device (which may be a floating body such as a raft instead of a vessel) of this disclosure is The vessel (floating body) comprises a ship (floating body) on which a sedation device 1 is installed and on which a deck 101 (place) is placed for fish F that have been sedated by the sedation device 1.

[0057] (Examples) The electric shocker 30 receives a 24V DC power supply voltage from the battery 50 and converts it to AC. The electric shocker 30 according to this embodiment has a mode selection button (labeled MODO SELECT in Figure 9) for setting to one of three modes, and an output adjustment dial (labeled 0 to 20 in Figure 9) for setting to one of 1 to 20 levels. The three modes are soft mode "S", normal mode "N", and hard mode "H". In soft mode "S", the wavelength of the output voltage pulse is long (low frequency), in hard mode "H", the wavelength of the output voltage pulse is short (high frequency), and in normal mode "N", the wavelength (frequency) is between the wavelength (frequency) of soft mode "S" and the wavelength (frequency) of hard mode "H".

[0058] For example, when Soft Mode "S" was set and the output adjustment dial was set to "1", the output voltage was approximately 20V and the output current was approximately 18A. When Normal Mode "N" was set and the output adjustment dial was set to "20", the output voltage was approximately 350V and the output current was approximately 240A. When Hard Mode "H" was set and the output adjustment dial was set to "20", the output voltage was approximately 330-340V and the output current was approximately 230A.

[0059] The electric shocker 30 was fitted with the two electrodes 20 and 21 described above, set to soft mode "S", and the output adjustment dial was set to 20 to calm the tuna in the tank. At this time, the output voltage of the electric shocker 30 was 312V (OUTPUT(V) 312 in Figure 9), and the output current was 134A (OUTPUT(A) 134 in Figure 9).

[0060] (Comparative Example 1) Unlike the electrode 20 floating near the water surface described above, in Comparative Example 1, a worker manipulates an electrode rod to directly contact the electrode at the tip of the rod with the tuna. In this method, the electric shocker 30 was set to normal mode "N" and the output adjustment dial was set to 12 to calm the tuna in the holding tank. At this time, the output voltage of the electric shocker 30 was 230V and the output current was 217A.

[0061] (Comparative Example 2) Furthermore, in the method described in Comparative Example 2, in which a worker manipulates an electrode rod to directly contact the electrode at the tip of the electrode rod with the tuna, the electric shocker 30 was set to normal mode "N" and the output adjustment dial was set to 14 to calm the tuna in the holding tank. At this time, the output voltage of the electric shocker 30 was 234V and the output current was 239A.

[0062] (Comparison results between the example and comparative examples 1 and 2) In the tuna sedation method described in the embodiment, the tuna was sedated with a power output of 312V × 134A = 41,808W, even though the electrodes were not in contact with the tuna. Furthermore, in the tuna sedation method according to Comparative Example 1, the electrodes came into contact with the tuna, and the tuna was sedated with an electrical energy of 230V × 217A = 49,910W. Furthermore, in the tuna sedation method according to Comparative Example 2, the electrodes came into contact with the tuna, and the tuna was sedated with an electrical energy of 224V × 239A = 55,926W. Comparing the results above, the power consumption in the example was the lowest, indicating that the non-contact method did not necessarily result in higher power consumption than the contact method.

[0063] (Other examples) In the embodiment described above, the worker operated a hand switch to calm the attracted fish F when it entered the lifting area A, but the fish F may be calmed automatically. For example, the electric shocker 30 may apply electrical energy between electrodes 20 and 21 based on the detection result of a sensor (regardless of the type of sensor) that detects when the fish F enters the lifting area A.

[0064] Furthermore, in the above-described embodiment, the winding machine 10 was activated when the fish F was calmed down and the fish F was placed on the deck 101, etc., but the timing of lifting the calmed fish F may also be automated. For example, the winding machine 10 may wind up the fishing line 12 at a predetermined timing after the application of electrical energy by the electric shocker 30, or the winding machine 10 may wind up the fishing line 12 when the fish F has calmed down, based on the determination of whether or not the fish F has calmed down from an image captured by a camera or the like.

[0065] The water in which fish F inhabits may be seawater, brackish water, or freshwater. The electrical energy applied by the electric shocker 30 can be appropriately adjusted according to the type of water in which fish F inhabits.

[0066] Furthermore, although one set of electrodes was used in the above-described embodiment, multiple sets of electrodes may be used. In this case, the area in which the fish F can be calmed is expanded, thereby improving the efficiency of calming the fish F. Also, when using multiple sets of electrodes, multiple sets of electrodes may be installed along the side of the ship, or electrodes may be set on both the starboard and port sides of the ship. [Explanation of symbols]

[0067] 1: Sedation device 10: Winder 11: Fishing hook 12: Fishing line 20: Electrode 21: Electrode 30: Electric Shocker 40: Frame 50: Battery 60: Float

Claims

1. A sedation device for calming fish in water, A winding machine that winds up a fishing line to which a fishing hook is attached and pulls in fish caught on the fishing hook, Two electrodes are provided at intervals in the lifting area for lifting the fish that have been pulled in by the winding machine out of the water, A sedation device comprising an electric shocker electrically connected to the two electrodes, which applies electrical energy to the two electrodes to sedate the fish in the lifting area without contact with the two electrodes.

2. Above the lifting area, a frame is provided so as to surround the lifting area, The calming device according to claim 1, further comprising a film-like or mesh-like protective member provided so as to extend downward from the frame.

3. The sedation device according to claim 2, characterized in that at least one of the two electrodes is suspended from the frame so as to be movable in a direction approaching the position where the fish is lifted and in a direction away from the position where the fish is lifted.

4. The sedation device according to claim 3, characterized in that one of the two electrodes is an electrode suspended from the frame and has a float attached to position the electrode near the sea surface, and the other of the two electrodes is a cylindrical electrode.

5. The sedation device according to claim 1, wherein the lifting area is a rectangle with an opening on one side for lifting the sedated fish, and the two electrodes are installed at diagonal positions of the rectangular lifting area.

6. The sedation device according to claim 1, characterized in that the fish are tuna, farmed tuna, farmed tuna weighing 30 kg to 100 kg, or farmed tuna weighing 50 kg to 70 kg.

7. A sedation device according to claim 1, A floating body with a sedation device, characterized by comprising: a floating body on which the sedation device is installed and which has a place on which fish sedated by the sedation device are placed.

Images