JP2006109710A - Method for immediately killing fish and apparatus for pretreating of immediate killing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suitably hold down a fish not to rage before immediate killing in immediately killing the fish. <P>SOLUTION: A method for immediately killing the fish comprises a pretreating step of injecting smoke into a water tank where the live fish swims and lowering the movement of the live fish and an immediate killing step of carrying out the immediate killing of the live fish with lowered movement by the pretreating step. The movement of the live fish is made slowly sluggish by injecting the smoke into the water tank in the pretreating step and the live fish is then changed into an asphyxial state. Since the movement of the fish is lowered by the pretreating step, the efficiency of the next immediate killing treatment can be raised without making the fish rage even when the fish is taken up from the water tank. The freshness can more be maintained by improving accuracy in piercing the medulla oblongata with a cutting knife and suppressing the consumption of physical strength of the fish. Furthermore, even the lowering of merchandise value by occurrence of damage to the fish body, internal hemorrhage, etc., can be suppressed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for alive fish and an apparatus for pretreatment for alive fish.

  Fish slaughter cuts the medulla of the fish with a blade and kills the fish, and further drains the blood, reducing the progression of biochemical changes and the harmful effects of residual blood, maintaining the freshness of the dead fish Widely used as a method. Generally, live tightening is performed manually by continuously taking out live fish swimming in an aquarium such as a ginger with a net or the like.

In the conventional squeeze method, the live fish is exposed to the processing table from the water, and the fish is exposed. For this reason, there is a problem that accuracy when piercing the medulla is lowered and work efficiency is also lowered. In addition, when the fish is rampant, there is a problem that the fish's physical strength is consumed and the freshness is likely to be lowered, and further, the fish body is damaged or internal bleeding occurs, thereby reducing the value of the fish as a product.
Then, in view of said problem, this invention makes it a subject to suppress appropriately that a fish rampages before laying down in the alive setting of a fish.

In order to solve the above problems, the present invention has the following configuration.
Invention of Claim 1 injects smoking into the aquarium where live fish swim, and pre-processes which reduce the movement of the said live fish, and live tightening with respect to the live fish which motion decreased by the pre-process This is a method for squeezing a fish having a squeezing process to be performed.
The invention according to claim 2 includes a water tank for swimming live fish, a smoke generating means for heating the wood to generate smoke, and a transfer means for sending the generated smoke into the water tank. It is a processing device.

In the invention according to claim 1, by injecting smoke into the water tank in the pretreatment step, the movement of the live fish gradually slows down and eventually becomes a tentative death state. This is presumed to be caused by the fact that the smoke component is gradually accumulated in the body and the amount of dissolved oxygen is relatively reduced due to the dissolution of the smoke in water. The movement of the fish is reduced by this pre-treatment process, so that even if the fish is picked up from the aquarium, the fish will not be exposed, the efficiency of the next squeezing process can be improved, and the accuracy of penetrating the medulla with the blade can be improved. The freshness can be further maintained by suppressing the exhaustion of the physical strength of the fish. In addition, it is possible to suppress a decline in commercial value due to the occurrence of fish damage or internal bleeding.
In the invention according to the second aspect, the fish movement can be easily reduced by swimming the fish in the aquarium, so that it is possible to easily perform the slaughtering process.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an outline of a freshening pretreatment apparatus X according to an embodiment of the invention. The pre-settlement pretreatment apparatus X is composed of a water tank 10 for swimming fish, a smoke generating unit 20 for heating wood to generate smoke, and a transfer device 30 for sending the generated smoke to the water tank. The water tank 10 is made of acrylic here, but any water tank 10 may be used as long as it can store water. The smoke generating unit 20 holds wood and heats it with a stove. In addition, the smoke generation part 20 is sufficient only in a holding part, when using smoked wood as a wood. The transfer device 30 includes an air pump 31, a pipe 32 connecting the discharge port of the air pump 31 and the water tank 10, and a disperser 33 for diffusing smoke at the outlet of the pipe 32. The air pump 31 and the smoke generating unit 20 are housed in the same housing, and a partition communicated by the filter 22 is provided between them.

A method for squeezing fish using the pre-settlement processing apparatus X having the above-described configuration will be described below.
First, a pretreatment process is performed. It is assumed that the aquarium 10 is already filled with seawater, the live fish A is swimming, and the air pump 31 is started. First, wood smoke such as oak, oak and beech is put into the smoke generating part 10 to generate heated smoke. When smoke is generated, the smoke reaches the water tank 10 through the filter 22 from the air pump 31 through the pipe 32, diffuses by the disperser 33, and dissolves in seawater in the water tank. After a while, the operation of live fish A slows down and eventually enters a state of death. This is the end of the pretreatment process.
When the pretreatment process is finished, a life-setting process is performed next. In the squeeze process, live fish that is in a mortal state is scooped out of the aquarium 10 with a net, and medulla is cut and slaughtered.
By laying down by such a process, the fish is not exposed at the laying-down stage, so that the laying-up process can be performed appropriately and quickly. In addition, if the fish that has actually been squeezed by this method and the fish that has been squeezed by the conventional method are viewed as changes over time using the elasticity of fish meat, the quality of blood, and the color of normal meat as indicators, There was a clear advantage for the fish. It can be presumed that the smoke component of wood is eluted in seawater and is taken into the fish body from the fish gills, so that the antibacterial and antioxidant properties contained in the smoke component are imparted.

It is a conceptual diagram of the life-saving pre-processing apparatus which concerns on embodiment of invention.

Explanation of symbols

X
10 Water tank 20 Smoke generator 30 Transfer device

Claims (2)

A pretreatment step of injecting smoke into a water tank in which live fish swim, and reducing movement of the live fish;
A fish squeezing method comprising: a squeezing process for squeezing live fish whose movement has been reduced by the pretreatment process. An aquarium for swimming live fish,
A smoke generating means for heating wood to generate smoke;
A life-saving pretreatment device having transfer means for sending the generated smoke to the water tank.

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