JP7002962B2 - Fish sedation device - Google Patents

Description

The present invention relates to a fish sedation device, and more particularly to a fish sedation device that quiets landed fish so as not to run wild.

In general, when a fish goes wild during landing, lactic acid accumulates in the body of the fish and the taste deteriorates. Therefore, in order to calm the fish to be landed, it has been conventionally practiced to use an electric shock to calm the fish. ..

For example, a method has been proposed in which electricity is applied between electrodes installed in water to give an electric shock to fish existing between the electrodes to calm them down.

As an example, in seawater, seawater has a higher electrical conductivity than fish, so even if electricity is simply applied between the electrodes, no current will flow through the fish in the seawater. It has been proposed that by energizing the provided net part, an electric shock is applied to the fish swimming near the net part to calm it down, and the calmed fish is taken into the net part and taken out of the water ( See Patent Document 1).

In addition, multiple fish with spines are scooped together from the sea with a landing net, and after all the fish are taken out of the sea into the air, the two pole electrodes installed in the landing net are energized and all of them are energized. The fish is energized through the seawater adhering to the body surface of the fish, and the fish is electrocuted to the extent that the spine is not damaged to calm the fish. Has also been proposed (see Patent Document 2).

Japanese Unexamined Patent Publication No. 2012-165720 JP-A-2017-018028

However, since the sedation method shown in Patent Document 1 is a method of applying an electric shock to a fish in seawater that is not in direct contact with the net, it is necessary to set an excessive energizing power to the fish, which is excessive. In the fish that received the electric shock, there were inconveniences such as the spine being broken and internal bleeding occurring in the vicinity of the broken part.

Further, since the sedative landing method shown in Patent Document 2 energizes the water adhering to the fish in the air through a plurality of fish themselves that are in contact with each other in the tamotsu net, the stability of energization to the fish is improved. There was a risk of chipping.

The present invention has been made in view of these points, and is a fish sedation device capable of reliably sedating a plurality of fish without causing spinal breakage or internal bleeding when landing a plurality of fish together. Is intended to provide.

In order to achieve the above-mentioned object, the fish calming device according to the present invention has a fish sliding plate made of a conductive material inclined so that the fish can pass by its own weight, and an electrode frame located above the fish sliding plate. It has a plurality of flexible linear electrodes that are suspended in contact with the fish and are energized in contact with the fish, and the moisture adhering to the fish is removed between the linear electrodes that the fish is in contact with and the fish sliding plate. The electrode support plate that supports the flexible linear electrode and the fish sliding plate are both arranged so that the inclination angle can be adjusted, and the flexible linear electrode is flexed. The sex linear electrodes are movably arranged so that the distance from the fish sliding plate can be changed, and a sensor for measuring the three-dimensional shape of the fish is arranged on the upstream side of the fish sliding plate in the movement direction of the fish. To control both the inclination angle of the electrode support plate supporting the flexible linear electrode and the fish sliding plate based on the three-dimensional shape of the fish by the sensor, and to control the height of the flexible linear electrode. It is at the point where it was done.

By adopting such a configuration, the fish is calmed by the energized electric shock, so that the fish can be calmed without damaging the fish body. By adopting such a configuration, the fish can be reliably sedated according to the shape of the fish to be sedated. Moreover, the fracture rate of fish can be significantly improved by energizing each fish individually.

In still another fish sedation device according to the present invention, in the one according to claim 1 , a plurality of the plurality of flexible linear electrodes are provided in both a fish moving direction and a direction orthogonal to the moving direction. It is at the point where it was placed.

By adopting such a configuration, it is possible to more reliably energize the fish.

The other fish sedation device according to the present invention is the one according to claim 1 or 2 , wherein each of the flexible linear electrodes is vertically laid down on the electrode frame. It is in.

By adopting such a configuration, it is possible to reliably energize the fish without catching it on the electrodes.

The other fish sedation device according to the present invention is the one according to any one of claims 1 to 3 , wherein the sedation device is installed on a ship.

By adopting such a configuration, the landed fish can be immediately calmed down.

According to the fish sedation device according to the present invention, the landed fish can be continuously and surely sedated one by one, and the fracture rate of the fish can be dramatically reduced.

Schematic side view showing an embodiment of a fish sedation device according to the present invention. Top view of FIG. Explanatory drawing which shows an example of arrangement of the flexible linear electrode of FIG.

1 to 3 show an embodiment of the present invention, and the fish sedation device 1 is installed on the deck of a fishing vessel (not shown) as an example.

The fish sedation device 2 has a hopper 4 with an upper opening 6 for feeding fish. From the lower part of the hopper 4 to the downstream side in the movement direction of the fish, a flat plate-shaped fish slide plate 8 is arranged so as to be positioned lower toward the downstream side in the movement direction of the fish, and the fish slide plate 8 is arranged. , Formed from a conductive material such as stainless steel. The fish sliding plate 8 is arranged at an angle of about 17 degrees with respect to the horizontal direction as an example, and the fish thrown in from the hopper 4 is slid down by its own weight. Further, the tilt angle of the fish sliding plate 8 is adjusted by a known driving device (not shown). Further, side plates (not shown) for preventing the falling of fish are erected on both sides of the fish sliding plate 8.

On the downstream side of the fish sliding plate 8 in the direction of movement of the fish, a bottom plate 10 having an opening 12 (FIG. 2) for inserting the fish sedated by the fish sedating device 2 is arranged.

Above the fish sliding plate 8, a plurality of flexible linear electrodes 14, 14 ... Are arranged in a grid pattern in each of the vertical and horizontal directions, that is, in both the direction in which the fish moves and the direction orthogonal to the moving direction. The electrode support plate 16 which is a flat plate-shaped electrode frame that supports the fish slide plate 8 is inclined so as to be positioned substantially parallel to the fish sliding plate 8. The electrode support plate 16 is connected and supported to a known drive device (not shown) so that the distance from the fish sliding plate 8 and the inclination angle can be adjusted.

Each of the flexible linear electrodes 14 is formed to have a thickness such that flexibility can be obtained by using a conductive material such as stainless steel. Further, each of the flexible linear electrodes 14 is swingably supported by the electrode support plate 16, and therefore, the flexible linear electrodes 14 are vertically installed in a state where fish do not come into contact with each other. In this state, the tip of each flexible linear electrode 14 and the fish sliding plate 8 are set to have a distance from each other. Since each of the flexible linear electrodes 14 is swingably supported by the electrode support plate 16, the contact time with the fish sliding on the fish sliding plate 8 can be lengthened, and the fish can be contacted with the fish. Can be reliably sedated.

The flexible linear electrode 14 and the fish sliding plate 8 are energized at a desired time by a power source (not shown) and an electric control device, and the voltage at the time of energization, The current etc. can be set arbitrarily.

A sensor 18 for measuring the size (three-dimensional shape) of the fish thrown in from the upper opening 6 of the hopper 4 is disposed between the hopper 4 and the electrode support plate 16. It is connected to a control device such as an LSI (Large Scale Integrated Circuit) (not shown). The control device controls the height of each of the flexible linear electrodes, that is, the height of the electrode support plate 16 based on the three-dimensional shape of the fish by the sensor 18 by the control device. The tilt angle of the fish sliding plate 8 is also set to an angle that makes it easy for the fish to slide down depending on the size of the fish detected by the sensor, and also facilitates stable energization through the water adhering to the fish.

Further, it is preferable that the fish put into the hopper 4 are of the same type and have a similar three-dimensional shape in order to stably carry out energization.

Next, the operation of the above-described embodiment will be described.

When the fish sedation device 2 of the present embodiment is installed on the deck of a fishing boat, the fish species and sizes of the caught fish are sorted in advance, and fish of the same fish species and substantially the same size are hopper 4 It is thrown in from the upper opening 6 of. Then, the sensor 18 measures the size (three-dimensional shape) of the fish body, and the control device (not shown) calculates this measured value, and the height of the electrode support plate 16 according to the size of the fish body and the fish. The tilt angle of the sliding plate 8 and the electric numerical value for giving an electric shock to the fish are controlled. No, these adjustments may be made for each batch of multiple fish.

As described above, when a fish of the same species and a similar size is thrown in from the upper opening 6 of the hopper 4 with the electric control device turned on, each thrown fish slides down the fish slide plate 8. do. At this time, the flexible wire is in contact with or in contact with any one of the plurality of tips of the plurality of flexible linear electrodes 14 arranged in a grid pattern facing the fish sliding plate 8 at intervals on the fish sliding plate 8. The shape electrode 14 can be swung and bent. At this time, an electric current flows between the flexible linear electrode 14 and the fish sliding plate 8 which are in contact with each other through the water adhering to the surface of the fish, and gives an electric shock to the fish. As a result, each fish that receives an electric shock faints and is sedated. Moreover, since the calmed fish slide down on the fish slide plate 8 one by one, it is possible to prevent fractures caused by the fish being entangled with each other.

Each sedated fish is stored in a desired storage location through the opening 12 of the bottom plate 10.

As described above, according to the fish sedation device of the present embodiment, the caught fish can be sedated reliably, and the fracture of the fish can be avoided, so that a fish having a high commercial value can be obtained.

The present invention is not limited to such a configuration, and various modifications can be made as needed. The fish sedation device of the present invention can be installed not only on a fishing boat but also on land.

2 Fish sedation device 4 Hopper 6 Top opening of hopper 4 8 Fish sliding plate 10 Bottom plate 12 Opening of bottom plate 10 14 Flexible linear electrode 16 Electrode support plate (electrode frame)

Claims (4)

A fish slide plate made of a conductive material that is inclined so that the fish can pass by its own weight, and a plurality of flexible wires that are suspended from the electrode frame located above the fish slide plate and are energized in contact with the fish. An electrode that has a shaped electrode and is energized through the fish between the linear electrode with which the fish is in contact and the fish sliding plate to calm the fish and support the flexible linear electrode. Both the support plate and the fish slide plate are arranged so that the inclination angle can be adjusted, and the flexible linear electrode is movably arranged so that the distance from the fish slide plate can be changed. A sensor for measuring the three-dimensional shape of the fish is arranged on the upstream side of the fish sliding plate in the movement direction of the fish, and the electrode support plate supporting the flexible linear electrode based on the three-dimensional shape of the fish by the sensor and the said. A fish calming device characterized in that the inclination angle of the fish sliding plate is controlled together and the height of the flexible linear electrode is controlled. The fish sedation device according to claim 1, wherein a plurality of the plurality of flexible linear electrodes are arranged in both the moving direction of the fish and the direction orthogonal to the moving direction. The fish sedation device according to claim 1 or 2, wherein each of the flexible linear electrodes is vertically provided vertically downward on the electrode frame. The fish sedation device according to any one of claims 1 to 3, which is installed on a ship.

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