JP2014187878A - Waterless packing method for live fish - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging method capable of delivering fresh live fishes to consumers by drastically improving the life time of the fishes through removal of excessive stresses and burdens on the fishes.SOLUTION: An airtight bag 6 such as a vinyl bag is provided inside a container body 2. A cradle 3 for partitioning the intermediate part in the height direction of the container body 2 is placed and fixed in the bag 6. A dorsal fin h or a portion around the dorsal fin of a fish S whose vitality and internal body temperature are reduced is put through a through-hole 5 formed in the cradle 3, and the fish S is accommodated with the abdomen turned up. After that, oxygen is supplied inside the bag 6 and a mouth of the bag 6 is tied. As necessary, a vinyl-bag-filled-with-ice or the like is placed in the container body 2.

Description

  The present invention relates to an improvement in waterless packaging / transportation technology for live fish such as yam grouper, which is performed in Okinawa Prefecture, for example.

  Traditionally, Okinawa Prefecture and other countries have cultivated large groupers that are warm-sead, but the experience of breeding during the cultivation shows that this fish is a fish species that is resistant to the environment underwater, making it cheap and easy. As a method of shipping, research has been conducted on packing and transporting without water.

  In this method, a fish that is being bred in seawater at 25 to 30 ° C. is accommodated in cold seawater at 11.5 to 15 ° C., so that the fish body is rapidly cooled to reduce its vitality, and then calmed down. In order to prevent the fish body from falling down and sticking to the lid, close the abdomen of the fish body to the bottom of the container and put a screen or cushioning material on both sides. Then, the container is packed with gum tape, and the injection gun connected to the oxygen gas cylinder is pierced into the polystyrene foam to fill the container with oxygen. (For example, refer to Patent Document 1.)

2010 Okinawa Prefectural Fisheries Experiment Station Project Report (Test on Aquatic Live Fish Transport of Cultured Yath Grouper (Safety and Safe Culture Production System Development Project))

In the above technology, it is said that it can be transported in a waterless state with a survival rate of 95% or more within 8 hours, but the swimming fish is rapidly put into cold water to reduce vitality. The method has such an adverse effect that a sudden temperature change can threaten the stress and life of the fish body, and the method of keeping the fish belly in close contact with the bottom surface of the container so that it does not fall down is There is a problem that it is difficult to open by contact and there is a heart and other internal organs necessary for survival in the abdomen, so that these are pushed and compressed by their own weight, and a large burden is placed on the fish body.
In addition, since the method of supplying oxygen into the container is performed through an injection gun pierced with polystyrene foam, there is a limit to the amount of oxygen injected into the container, and the oxygen concentration could not be increased so much.

  Therefore, the present invention is a waterless packaging of live fish that can reduce the weight, labor, labor force, etc. during transportation, by greatly improving the survival time without putting excessive stress and burden on the fish, It is an object of the present invention to provide a packaging method capable of delivering fresh fish to consumers.

  In order to achieve the above-mentioned object, the present invention reduces the vitality of live fish and lowers the internal temperature of the fish body, and then accommodates the live fish in a water-free container with the abdomen facing upward. Oxygen was supplied to the surroundings.

In this way, when storing live fish in a container, if the live fish's abdomen is stored facing upward, the salmon can be greatly opened and oxygen can be taken in effectively, and the heart and internal organs are not compressed, The burden on the fish can be reduced. At this time, for example, even when supporting the back of a fish, there are nerves and blood vessels that are protected by thick bones on the back side, and these areas are strong, so that they are affected by survival even if they are under their own weight. Hateful.
In addition, as a means for reducing the vitality of live fish, for example, a method of damaging the spinal cord, a method of rapidly cooling the fish body, and a method of applying an electric shock to the fish body, as in the prior art, can be applied. . Moreover, as a method of lowering the internal temperature of the fish body, for example, a treatment such as soaking the fish in cold water of about 10 to 15 ° C. for at least 1 hour or more can be applied.

In the present invention, the fish body is paralyzed as a method of reducing the vitality of the live fish.
As a method of paralyzing the fish body in this way, for example, a method of immersing the fish in cold water, applying an electric shock, or paralyzing the spinal cord of the fish can be applied, but the fish spinal cord is damaged and vitality is applied. As a method for reducing the above, for example, methods such as Japanese Patent No. 3706879, Japanese Patent No. 3729844, and Japanese Patent No. 4244362 according to the proposal of the present applicant can be applied. From the outside, a thin tool with a sharp tip is inserted to pierce the spinal cord, or an elongated rod-like jig is inserted into the nerve arch from the tail of the fish to damage the spinal cord near the medulla.

Further, in the present invention, when the live fish is stored in a water-free container with the belly of the live fish facing upward, a cradle in which a through hole through which the live fish dorsal fin and a part of the back part of the live fish pass can be formed is used. I did it.
That is, when trying to fix the fish abdomen in an upward posture, it cannot be held in a state where the dorsal fin is in the way and does not fall down. For this reason, if the back portion of the live fish is supported by passing the dorsal fin of the live fish or a part of the surrounding body through the through hole, a stable posture can be maintained with the abdomen facing upward.
And if such a cradle is comprised as a partition plate which partitions off the intermediate part of the height direction of a container, the malfunction that a back fin interferes with a container can be prevented, for example.

In the present invention, when oxygen is supplied around the live fish in the container, the live fish is accommodated in an airtight bag disposed in the container, and oxygen is supplied into the bag.
In this way, if oxygen is supplied into the airtight bag, the oxygen density around the live fish can be increased and can be kept alive for a long time.

In the waterless packaging of live fish that can reduce the weight, labor, labor, etc. during transportation, accommodate the live fish in the container with the abdomen of the live fish with the vitality of the live fish lowered and the internal temperature of the fish body lowered upwards, By supplying oxygen around the live fish, the burden on the fish can be reduced, and at the same time, the respiration can be facilitated to survive for a long time, and the freshness can be maintained even during long-distance transportation.
At this time, if the fish body is paralyzed and its vitality is lowered, the stress applied to the fish can be suppressed, and a receiving hole provided with a through hole through which the dorsal fin of the live fish and a part of its periphery can be passed. If the fish body is supported by the table, a stable posture can be maintained. Furthermore, if oxygen is supplied using an airtight bag disposed in the container, the oxygen concentration increases and the survival time can be greatly extended.

It is explanatory drawing which shows an example of the container used for the packing method of this invention. It is explanatory drawing which shows an example of a fish. It is explanatory drawing which shows the packing method of this invention.

  The waterless packaging method for live fish according to the present invention is a waterless packaging for live fish that can reduce the weight, labor, labor force, etc. during transportation. By greatly improving, it is possible to provide a packaging method that can deliver fresh fish to consumers, etc., and live fish with reduced vitality and reduced internal temperature of the fish in the container It is characterized in that the abdomen is housed upward when it is housed, and the release of the shark is facilitated, and the burden on the fish due to pressure on the heart, internal organs, etc. due to its own weight is reduced.

  Such a fish is particularly suitable if it is applied to a fish species having high resistance even if it is exposed to the air outside the water, for example, a warm-sealing jade grouper, but the type of fish is limited. Not.

  As shown in FIG. 2, the fish S is generally provided with a dorsal fin h on the back side, and the lower end of b of the shark lid extends to near the lower mouth. In addition, nerves and blood vessels protected by thick bones pass through the dorsal side, and there are strong bodies around it, but there are hearts and internal organs on the abdomen side, and the surroundings are surrounded by soft bodies It is.

  When such a fish S is housed in a container made of polystyrene foam or the like, conventionally, the abdomen of the fish S is brought into close contact with the bottom of the container so that the fish body collapses and the lid lid b does not come in close contact with a partition or cushioning material on both sides. It is as described above that the technology of packing in a state where it does not fall down by putting in is put on, but when the abdomen of fish S is brought into close contact with the bottom of the container, the lid lid b is difficult to open, In addition, the strain on the fish increases because the heart and internal organs are pressed.

  Therefore, the present invention improves the conventional method so that the life span of fish can be greatly extended. Before explaining the waterless packaging method for live fish according to the present invention, The container 1 to be used will be described.

The container 1 is made of a lightweight material having a heat insulating effect such as made of polystyrene foam, for example, and as shown in FIG. 1, a container body 2 and a cradle assembled to an intermediate portion in the height direction inside the container body 2. 3 and a lid 4, and a through hole 5 through which the dorsal fin h of the fish S and a part of the surrounding back part can pass is formed in the cradle 3.
And this through-hole 5 is shaped so that the abdomen of the fish S faces upward by passing the dorsal fin h of the fish S and a part of the surrounding body, and the fish body does not fall down while maintaining its posture. It is in size.
Further, in this embodiment, two through holes 5 are provided along the longitudinal direction so that two fish can be accommodated at the same time, but the number thereof is arbitrary.

  The waterless packaging method for live fish according to the present invention is started by first reducing the vitality of the fish S and lowering the internal temperature of the fish body. And in the case of warm sea fish such as jade grouper, the fish's vitality may be decreased by immersing the fish in cold water to cool the fish rapidly, but in this example, the fish spinal cord is damaged. By doing so, the motor function is lowered. Moreover, as a method of cooling the internal temperature of the fish body, in this embodiment, the internal temperature of the fish body is about 15 ° C. or less by immersing the fish S in cold water of about 10-15 ° C. for at least 1 hour. I try to become.

  In addition, spinal cord injury is performed by inserting a thin tool with a sharp tip from the inside or outside of the lid b to pierce the spinal cord, or by inserting an elongated rod-like jig into the nerve arch from the tail of the fish, This is done by damaging the spinal cord in the vicinity of the medulla oblongata, but the fish S that has damaged the spinal cord in this way almost loses its ability to exercise, but continues to breathe. For example, in seawater, The body becomes calm with the abdomen facing upward, and only vaginal breathing is performed.

On the other hand, as shown in FIG. 3A, a resin bag 6 such as an airtight plastic bag is placed in the container body 2 with the opening portion facing upward, and the cradle 3 is inserted into the bag 6. Then, the cradle 3 is fixed to an intermediate portion in the height direction in the container body 2. At this time, it is preferable that the resin bag 6 below the cradle 3 has a margin so that the bag 6 and the back fin h do not interfere when the resin bag 6 is inflated.

Then, the fish S is placed on the cradle 3 with the abdomen of the fish S facing upward by passing the dorsal fin h of the fish S and a part of the surrounding body through the through hole 5 of the cradle 3. At this time, the dorsal fin h of the fish S and a part of the surrounding body are fitted into the through hole 5, and the fish S is held in a posture with the abdomen facing upward.
Of course, the above procedure is such that after the fish S is placed on the cradle 3, the cradle 3 is inserted into the bag 6 together with the fish S and fixed to the intermediate portion of the container body 2 in the height direction. It may be a procedure.

Next, as shown in FIG. 3 (b), the air inside the resin bag 6 is evacuated, and oxygen is filled in the evacuated bag 6, and as shown in FIG. 3 (c), the resin bag 6 Inflate.
Then, the mouth of the bag 6 is tied with a rubber band or the like to prevent oxygen from leaking outside, and then the lid 4 is put on. At this time, if necessary, a plastic bag filled with ice or the like may be placed in the container body 2 to cool the inside of the container.

According to such a procedure, the fish S breathes while being alive, and the internal temperature of the fish body is maintained at a low temperature and the amount of oxygen consumption is small.

  In the packaged state as described above, there is no seawater and it is light because it is anhydrous, and even when transported at room temperature, the thermal conductivity of air is 0.057 at W / m / s ° C. The thermal conductivity W / m / s ° C. is 1.40, which is less susceptible to the influence of the outside air temperature.

  It should be noted that the ability to leave live fish alive for a long period of time was confirmed by the fact that the grouper had survived 18 hours after unpacking and unpacking as a result of experimenting with the grouper. It was.

In addition, this invention is not limited to the above embodiments. What has substantially the same configuration as the matters described in the claims of the present invention and exhibits the same operational effects belongs to the technical scope of the present invention. For example, the fish species and the like are not limited to the grouper.

  Since live fish can be transported for a long time, there is little stress on the fish, and the weight of the package is light.

DESCRIPTION OF SYMBOLS 1 ... Container, 3 ... Receptacle, 5 ... Through-hole, 6 ... Resin bag, S ... Fish, h ... Dorsal fin.

Claims (4)

The step of reducing the vitality of the live fish and lowering the internal temperature of the fish body, the step of accommodating the live fish in a container without water with the abdomen facing upward, and the step of supplying oxygen around the live fish in the container A waterless packaging method for live fish. The waterless packaging method for live fish according to claim 1, wherein the step of reducing the vitality of the live fish is paralyzing the fish body. In the step of accommodating the live fish belly upward in a container without water, a cradle having a through hole through which a dorsal fin of the live fish and a part of the back of the live fish can be passed is used. The waterless packaging method for live fish according to claim 1 or 2. 2. The step of supplying oxygen around the live fish in the container comprises storing the live fish in an airtight bag disposed in the container and supplying oxygen into the bag. The waterless packaging method for live fish according to any one of claims 3 to 4.

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