JP2002345396A - Device for causing brain death for fish and method for using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for causing the brain death for a fish, capable of simplifying the detection of the position of the brain death point, and usable without energizing. SOLUTION: The head part F1 of the fish F is positioned so as not to be moved in an inserting opening 1a of a positioning means 1 by fitting the head part F1 in the inserting opening 1a, and simultaneously a hitting part 2a by a hammer means 2 is positioned so as to face to the brain death point. When the hitting part 2a of the hammer means 2 in the fitted state is moved by an air pressure so as to protrude, the hammer shock is provided to the brain death point P.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brain death device for fish that makes captured fish brain dead for artificial hatching and egg collection of fish such as salmon and trout. For more information,
The present invention relates to a brain death device for fish which is brought into a brain death state by giving an external shock to a brain death point in a fish head.

[0002]

2. Description of the Related Art Conventionally, as this kind of brain death device for fish,
For example, as disclosed in Japanese Patent Publication No. 5-20052,
The captured fish is placed on the conductive inner case, the head is inserted into the head case, the conductive needle is pierced into the fish brain, and the conductive needle and the inner case are energized to produce the fish. By applying a voltage to the brain and applying an electric shock, the brain is instantaneously killed and some functions are stopped, and while the organs other than the brain of this brain dead fish continue to operate normally, Some eggs are collected by discharging it from the head case. Also, when fish are caught and picked up from the water, they are surprised by the unfamiliar environment and rampage.Especially, salmon near the spawning season is large and the surface immediately after picking up from the water is wet and slippery, so it is fixedly deployed on the ground. The operator had to keep holding the head until it was placed on the inner case and the head was inserted into the head case.

[0003]

However, in such a conventional brain death apparatus for fish, in order to energize the fish and bring it into a brain-dead state, if the worker touches the wet fish at the start of energization, There is a problem that there is a risk of electric shock and it is very dangerous. Further, since it is necessary to carry out a preparation work for taking out the fishes taken out of the water and rampaging them up to the ground and holding them immovable, there is also a problem that these preparation works are troublesome, the workability is poor, and a large amount of fish cannot be brain-dead in a short time.

It is an object of the present invention to provide a fish brain death apparatus in which the position of the brain death point can be easily detected and the electricity is not supplied. The second aspect of the present invention has an object of making the fish of different sizes compatible with one apparatus in addition to the object of the first aspect of the present invention. The third aspect of the present invention aims at smoothly performing a preparation operation in addition to the object of the first or second aspect of the present invention. Claim 4
The invention described in addition to the object of the invention described in claim 3,
The purpose is to ensure that a hammer shock is given to the point of brain death even if fishes are somewhat violent. The invention described in claim 5 has the object of enabling, in addition to the object of the invention described in claim 3 or 4, to cope with the case where the head F1 of the fish F is slightly smaller or larger than the standard size without replacement parts. It is what it was.

[0005]

In order to achieve the above-mentioned object, according to the first aspect of the present invention, there is provided a positioning apparatus in which an insertion port 1a which is fitted to an elasticity surrounding surface F2 near a brain death point P is opened. Means 1 and a hammer means 2 by which a striking portion 2a projects toward the inside of the insertion opening 1a by pneumatic pressure. In a state where the head F1 of the fish F is fitted into the insertion opening 1a of the positioning means 1, The striking part 2a of the hammer means 2 is arranged so as to face the brain death point P. Here, the brain death point P is a position about 1 cm away from the center of the line connecting both eyes on the back side of the head F1 to the tail side. According to a second aspect of the present invention, in the configuration of the first aspect, the positioning means 1
A plurality of insertion openings 1a are provided corresponding to the heads F1 of the fishes F having different sizes, and a configuration in which the insertion openings 1a are freely exchangeable according to the size of the head F1 is added. According to a third aspect of the present invention, in the configuration of the first or second aspect, the insertion port 1a is inserted into water, and the insertion port 1a is inserted in water.
It is characterized in that a configuration is added in which the head F1 is fitted. According to a fourth aspect of the present invention, in the configuration of the third aspect, the insertion portion la into which the head F1 is fitted is lifted from underwater to above water, and then the striking portion 2a of the hammer means 2 is protruded and moved. Is added. A third aspect of the present invention is characterized in that, in addition to the configuration of the third or fourth aspect of the present invention, a configuration in which the insertion opening 1a is inserted obliquely with respect to the measuring line F3 of the fish F is added.

[0006]

According to the first aspect of the present invention, an insertion port of the positioning means is provided.
By inserting the head F1 of the fish F into the insertion hole 1a, the head F1 is immovably positioned with respect to the insertion port 1a, and at the same time, the striking portion 2a of the hammer means 2 faces the brain death point P. When the hitting portion 2a of the hammer means 2 is protruded by air pressure in this fitted state,
A hammer shock is given to the brain death point P to be killed. According to a second aspect of the present invention, with respect to the configuration of the first aspect, a plurality of types of insertion ports 1a of the positioning means 1 are prepared corresponding to the heads F1 of fishes F having different sizes, and the size of the head F1 The hammer means 2 has a common hitting portion 2a by replacing the insertion opening 1a with a size that matches the size of the head F1 of the fish F to be brain-dead. It becomes usable. The invention of claim 3 is the invention of claim 1 or 2
For the configuration described, insert the insertion port 1a into water,
Since the configuration in which the head F1 is inserted into the insertion port 1a in water is added, the preparation work for inserting the head F1 in the insertion port 1a in water can be performed without removing the fish F from the water to the water. There will be no surprises and rampage in the environment where Fish F is unfamiliar. According to a fourth aspect of the present invention, in addition to the configuration of the third aspect,
A structure is added in which the insertion opening 1a in which the head F1 is fitted is lifted from the water to the water, and then the striking portion 2a of the hammer means 2 is protruded and moved, so that the fish F can lift the head F1 from the water to the water. However, the surrounding surface F2 fits into the insertion opening 1a without any gap and does not shift. According to the fifth aspect of the present invention, a configuration in which the insertion port 1a is obliquely inserted into the measuring line F3 of the fish F is added to the configuration of the third or fourth aspect, so that the head F1 has a standard size. In the case of a slightly smaller or larger fish F,
By arranging the insertion slot 1a obliquely to the measuring line F3 of the fish F, the hammer means 2 is provided at the brain death point P of the fish F.
Is precisely aligned.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, as shown in FIG. 1 to FIG. 3, the brain death apparatus A for fish is constructed such that a brain death point P (about 1 cm from the center of a line connecting both eyes to the caudal side) on the back of the head F1 of fish F. (A distant position) The positioning means 1 is engaged with the near-elasticity peripheral surface F2, and the hammer means 2 for killing which protrudes toward the brain death point P of the head F1 positioned by the positioning means 1. This is a case where

As shown in FIGS. 1 (a) and 1 (b), the positioning means 1 has an elliptical surface F near the brain death point P.
The insertion opening 1a that fits with the opening 2 is opened, and the inner shape of the insertion opening 1a is formed in a substantially elliptical shape that fits without a gap along the peripheral surface F2 of the head F1. Specifically, at least a portion facing the ventral side and both side surfaces of the fish F is formed in an elliptical shape along the outer peripheral surface when the head F1 is vertically cut in a direction orthogonal to the direction of the measurement line F3 of the fish F.

In the case of the present embodiment, in the direction orthogonal to the measurement line F3 along the gill surrounding surface F2 passing through the brain death point P,
By bending the wire 1b having a circular cross section into a substantially U-shape, the wire 1b is brought into line contact with most of the gill surrounding surface F2 excluding the brain death point P and its peripheral portion, and both ends 1 of the wire 1b are formed.
By attaching c and 1c to the hammer means 2 to be described later in a detachable manner, both are integrated.

The hammer 2 has a striking portion 2a which reciprocates by pneumatic drive into the insertion opening 1a. In the case of this embodiment, the hammer means 2 is an air gun such as a nailing machine, and when the trigger 2b is pulled, the piston is driven by compressed air supplied from a pressure source (not shown) such as a compressor. 2c is configured to rapidly protrude by about 5 mm to 1 cm at a predetermined pressure. It is preferable that a columnar hitting portion 2a is fixed to the tip of the piston 2c, and an uneven portion 2d is formed on the outer surface of the hitting portion 2a to prevent slippage.

Further, fixing means 2e for detachably attaching both ends 1c of the wire 1b are provided around the piston 2b. In the illustrated example, the fixing means 2e is a screw. However, the fixing means 2e is not limited to this, and any other structure may be used as long as both ends 1c, 1c of the wire 1b can be detachably attached.

The insertion opening 1a of the positioning means 1
Are prepared in a plurality of types corresponding to the heads F1 of the fishes F having different sizes, and these are interchangeable with the air gun constituting the hammer means 2 by the fixing means 2e, respectively. Select the one that fits the size and attach it. In particular, when salmon near the spawning season is brain-dead due to artificial hatching, the size of the head F1 is large, even though the size of the parent fish differs between males and females, even if the males and females differ in overall length. Since they are the same size, at least a larger one corresponding to the standard head size of the male parent fish shown in FIG. 1 (a) and a smaller one corresponding to the standard head size of the female (not shown) ) Is sufficient.

Next, a method of using such a fish brain death apparatus will be described in accordance with procedures. First, the operator sets the positioning means 1
Only the insertion slot 1a is inserted into the water, and the fish F to be brain killed is driven toward the standby position, and the head F1 is inserted into the insertion slot 1a, or the positioning means 1 is inserted in the water.
Is moved toward the fish F to be brain-dead, and its head F1 is fitted into the insertion port 1a. And FIG.
As shown in (a) and (b), the inner peripheral edge of the insertion opening 1a is fitted to a position close to the peripheral surface F2 near the brain death point P and does not shift.

As a result, the head F1 is immovably positioned with respect to the insertion slot 1a, and at the same time, the striking portion 2a of the hammer 2 is positioned facing the brain death point P. As a result, the position of the brain death point P can be easily detected.

At this time, if the fish F to be brain killed is guided to near the surface of the water, the air gun of the hammer means 2 facing the brain death point P on the back side does not have to be inserted into the water. Does not need to be subjected to strict waterproof treatment.

Since the fish F to be brain-dead cannot be taken from the water to the surface of the water, these preparations can be carried out smoothly without being surprised by an unfamiliar environment, and in a very simple and short time.

Thereafter, in this fitted state, the hammer 2
The hammering shock is given to the brain death point P if the striking portion 2a is caused to protrude by air pressure to be killed. Therefore, it is possible to provide a brain death apparatus for fish that can be carried out compactly and easily while causing brain death without energization.

At this time, if the head F1 is lifted from the water to the surface of the water together with the insertion port 1a in the fitted state and the striking portion 2a of the hammer means 2 is protruded and moved, there is no resistance due to water, and The hammer shock is reliably applied to the point P, and the mistake is reduced.

It should be noted that the fish F is violent because the head F1 is lifted from the water to the surface of the water, but since the peripheral surface F2 of the fish F fits into the insertion slot 1a without a gap and does not shift, the fish F is somewhat violent. However, the hammer shock can be reliably applied to the brain death point P.

If the size of the head F1 differs depending on the type of the fish F to be brain-dead or the difference between males and females, it is necessary to replace the head F1 with an insertion opening 1a having a size suitable for the size of the head F1 in advance. The hitting portion 2a of the hammer means 2 can be commonly used. As a result, fish F of different sizes can be handled by one fish brain death device A.

Furthermore, since the head F1 of the fish F to be brain-dead is slightly smaller than the standard size, even if the head F1 is inserted into the insertion opening 1a of the positioning means 1 to a position where it does not shift, the brain death point P Hitting part 2 of hammer means 2
In the case where a cannot be accurately aligned, as shown in FIG.
On the other hand, if the tip portion 1b 'is fitted so as to be inclined to the tail side from the brain death point P, and if it is fitted so as to be slightly oblique, the brain death point P of the slightly smaller fish F
Also, the hitting portion 2a of the hammer 2 can be accurately positioned.

Conversely, when the head F1 of the fish F is slightly larger than the standard size, the wire 1b forming the insertion port 1a is positioned at a distance from the measurement line F3 of the fish F as shown in FIG.
If the tip portion 1b is inserted with an inclination so as to be closer to the mouth than the brain death point P, the hitting portion 2a of the hammer 2 can be accurately positioned even at the brain death point P of the fish F which is slightly larger. As a result, there is an advantage that even if the head F1 of the fish F is slightly smaller or larger than the standard size, it can be handled without replacement parts.

In the embodiment described above, the positioning means 1
Along the outer peripheral edge F2 of the head F1 passing through the brain death point P,
A case has been described where the wire 1b having a circular cross section is bent into a substantially U-shape so that most of the wire 1b is in line contact. However, the present invention is not limited to this. As described above, the belt-like material may be bent into a substantially elliptical shape. Further, a plurality of wires or strips may be arranged along the gill-surrounding surface F2 so that the interval is increased in the direction of the measuring line F3 of the fish F.

Also, the case where the hammer means 2 is an air gun driven by air pressure, such as a nailing machine, has been described. However, the present invention is not limited to this. There may be. Further, the hammer means 2 which protrudes by air pressure is used. However, the present invention is not limited to this. If electricity is not used, a hammer means which protrudes by hydraulic pressure other than air pressure or water pressure may be used.

[0025]

As described above, according to the first aspect of the present invention, by inserting the head F1 of the fish F into the insertion opening 1a of the positioning means 1, the insertion opening 1a is formed.
At the same time, the head F1 is immovably positioned, and at the same time, the hitting portion 2a of the hammer means 2 is positioned facing the brain death point P, and the hitting portion 2a of the hammer means 2 is protruded by air pressure in this fitted state. If it is moved, a hammer shock is applied to the brain death point P and the brain death point P is killed, so that it is possible to provide a fish brain death device that can easily detect the position of the brain death point and does not energize. Therefore, compared to the conventional type, which may cause an electric shock when the worker touches the wet fish at the start of energization, there is no danger of electric shock even if the operator touches the fish, and it is compact and easy. It is easy to use because it can be carried around, and can prevent accidents such as electric shock even if it is accidentally dropped into water because it is not energized.

According to a second aspect of the present invention, in addition to the effect of the first aspect, a hammer is provided by replacing the insertion opening 1a with a size adapted to the size of the head F1 of the fish F to be brain-dead. Since the hitting portion 2a of the means 2 can be commonly used, fish of different sizes can be handled by one device. Therefore, it is economical because there is no need to prepare a plurality of dedicated devices corresponding to fish F of different sizes.

According to a third aspect of the present invention, in addition to the effects of the first or second aspect, the preparatory work for fitting the head F1 into the insertion port 1a in water is performed without removing the fish F from the water to the water. Therefore, the fish F is not surprised by the environment in which the fish F is unfamiliar, and the preparation work can be smoothly performed. Therefore, compared to the conventional one that requires preparation work to take up violent fish taken out from the water and hold it immovably, the work to transport the violent fish to a position away from the water surface is omitted, and workability is significantly improved. As a result, a large number of fish can be brain-dead in a short period of time even if they are not skilled.

According to a fourth aspect of the present invention, in addition to the effect of the third aspect of the present invention, the fish F is violent because the head F1 is lifted from the water to the surface of the water.
Since there is no gap due to fitting with a, no hammer shock can be reliably applied to the brain death point even if fishes are somewhat violent. Therefore, even a beginner who is not familiar with the work can be surely put into a state of brain death without making a mistake.

According to a fifth aspect of the present invention, in addition to the effects of the third or fourth aspect, in the case of a fish F whose head F1 is slightly smaller or larger than the standard size, the insertion opening 1a is connected to the measuring line F3 of the fish F. , The striking portion 2a of the hammer 2 is accurately aligned with the brain death point P of the fish F, so that the fish F can be replaced even if the head F1 is slightly smaller or larger than the standard size. Can handle without parts.

[Brief description of the drawings]

FIG. 1 (a) is a partially cutaway side view of a fish brain death apparatus showing one embodiment of the present invention, and FIG. 1 (b) is a front view showing a fish longitudinally.

FIG. 2 is a partially cutaway side view showing an example of use when the head of a fish is smaller than a standard size.

FIG. 3 is a partially cutaway side view showing an example of use when the head of a fish is larger than a standard size.

[Explanation of symbols]

 F Fish F1 Head F2 Around the gill F3 Measurement line P Brain death point 1 Positioning means 1a Insertion port 2 Hammer means 2a Striking part

Claims (5)

[Claims] 1. A brain death apparatus for fish which is brought into a brain death state by externally applying a shock to a brain death point (P) at a head (F1) of a fish (F), wherein the brain death point (P) is located near the brain death point (P). Positioning means (1) provided with an insertion opening (1a) fitted with the gill peripheral surface (F2), and hammer means (2) with which a striking portion (2a) protrudes toward the inside of the insertion opening (1a) by air pressure. ), And with the head (F1) of the fish (F) inserted into the insertion opening (1a) of the positioning means (1), the brain death point (P) and the hitting part of the hammer means (2). A brain death device for fish, wherein (2a) is arranged to face each other. 2. An insertion slot (1) of said positioning means (1).
The brain death for fish according to claim 1 or 2, wherein a) is prepared in plural types corresponding to the heads (F1) of the fishes (F) having different sizes, and is interchangeable according to the size of the heads (F1). apparatus. 3. An insertion slot (1a) of the brain death device for fish according to claim 1 or 2, wherein the insertion slot (1a) is inserted into water.
A method for using a brain death device for fish, wherein a head (F1) is fitted into a). 4. An insertion slot (1) into which the head (F1) is fitted.
4. The method for using a brain death apparatus for fish according to claim 3, wherein a) is lifted from the water to above the water, and then the hitting portion (2a) of the hammer means (2) is protruded. 5. The insertion opening (1a) is fitted obliquely to a measuring line (F3) of a fish (F).
A method for using the fish brain death device according to the above.