JPS6236129A - Method for transporting live fish - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a method for transporting live fish.

[Conventional technology]

It is well known that fish tanks have been used since ancient times to maintain the freshness of caught seafood.

There are a wide variety of shapes and sizes for this fish tank, including a wooden box, a cylinder made of bamboo or smoked fish, a net made, and a boat bottom shaped so that water can flow through a chamber in the bottom of the boat. It can be said that this is a representative example.

Of these, the methods that have been widely used as means of transporting the catch, especially between the fishing grounds and the storage cages, are boat bottom (or inboard) fish cages and towed fishing net fish cages, but the former has a limited capacity for fish. In the latter case, the water resistance during towing is unexpectedly large, which not only reduces the towing speed, but also causes a large number of fish to be killed or injured by contact with each other, making transport efficiency unsatisfactory.

[Problem to be solved by the invention]

In this way, conventional methods of transporting live fish are limited by the internal volume of the fish tank used, so the amount of fish handled is small, or the resistance to underwater towing is large, which not only reduces the towing speed but also causes significant damage to the fish during transport. There were problems that needed to be resolved, such as low efficiency.

[Means for solving problems]

In order to solve the above problems, the present invention places live fish in a streamlined, spindle-shaped or similar shaped cloth cage,
The method is to tow it underwater.

〔Example〕

The details of this invention will be described below with reference to the drawings.

First of all, a streamlined shape generally refers to the shape of an object that rarely creates vortices around it when it moves in a fluid, and a spindle-shaped shape is a cylindrical shape with both ends pointed, and there are also similar shapes. The shape is a shape that can be generally regarded as streamlined or spindle-shaped, even if there are parts that are not applicable locally, such as the fuselage of an airplane or ship, or the shape of a balloon (
(especially those that use hot air) and airship gas bags (air sacs)
There are no particular limitations as long as the shape has little resistance in the fluid, such as the shape of a whale or fish, or the shape of a hemispherical shape such as a parachute that brakes a moving body by the resistance in the fluid. are not preferred for this invention.

Next, the cloth fish tank A of the present invention is made of cotton fiber, which has excellent water resistance, salt water resistance, and tensile strength, and has been used for fishing nets since ancient times.
Natural fibers of plant and animal origin such as flax, Manila flax, taima, choma, and other flax fibers, silk, nylon,
Consists of a cloth bag 1 made of synthetic fibers such as vinylon, vinylitin, etc., or a fabric made of a blend of these fibers,
This cloth bag 1 has a rope part 2 made of the above-mentioned fibers (which also serves as an inlet and an inlet for the caught fish, an inlet for water, etc.) or a rope part 3 (the water pressure inside the cloth bag 1 during towing). The water pressure control valve 4 that adjusts the water pressure may be provided with a partition wall for keeping the fish in the cloth bag 1 away, a water outlet, etc., which also serves as a water outlet.
The shape is not particularly limited, such as a rectangular shape as exemplified by d.

In addition, a cover line 5 (a net may be used) may be used to reinforce the cloth bag 1, or during towing or stopping; floats, weights, rudders, and horizontal rudders to ensure the balance and stability of the cloth bag. etc. may be added as ancillary devices as appropriate.

In order to tow such a hot bag 1, a plurality of tow ropes 6 connected directly or indirectly to the cover rope 5 are connected around the rope section 2.
Take advantage of. This towline 6 is preferably made of the above-mentioned fibers, and may be bundled in the middle as shown in the figure, and may also be attached with ropes, wires, cables, etc. for remote control of the accessory equipment provided on the cloth bag 1. There is no problem.

Note that the drawing used in the explanation is a schematic illustration of one embodiment, and for example, the head of the cloth bag 1 is oriented in the towing direction, and the rope section 3 is used as a fish inlet/outlet and a water inlet. Further, it is preferable to make the tail part into a tapered shape by the rope part 2 and ancillary devices such as the water pressure control valve 4 to further reduce the resistance, since this further enhances the effects of the present invention.

〔effect〕

The resistance when towing the streamlined, spindle-shaped, or similar shaped cloth cage used in the method of this invention in water is much smaller than the resistance of a net bag-type fish cage of the same shape and size.
In addition, the water in the cloth bag 1 remains generally stable even though it is replaced to match the amount of water discharged when the water pressure control valve 4 operates, so there is no risk of damaging the fish housed in the bag. Very few. Therefore, the caught fish can withstand long-distance transportation in a state where they can swim without being subjected to unnatural pressure, which not only helps maintain freshness, but also improves internal organs by short-term farming of fat-protective fish. Coupled with the reduction of unnecessary fat in the skin and subcutaneous areas, and improvements in technology to prevent deterioration of meat quality, it will become possible to provide a stable supply of inexpensive fish suitable as raw materials for processed fish products. The following can be mentioned as specific effects of this invention. That is, (
1) When not in use, fabric cages can be folded and stacked on a ship for transportation.

(2) Fabric cages are lightweight and easy to work with.

(3) There is little water resistance during towing, the decrease in towing speed is small, and transportation is safe, quick, and inexpensive.

(4) Large capacity for holding fish.

(5) There is little damage to fish due to net slippage, etc., and the mortality rate is extremely low.

Therefore, it can be said that the significance of this invention is extremely large.

[Brief explanation of the drawing]

The drawings are schematic diagrams for illustrating the method of transporting live fish according to the present invention. 1... Cloth bag, 2, 3... Rope section, 4... Water pressure control valve, 5... Cover rope, 6... Pull line, A... Fabric fish tank, rectangular abcct... Rope Front view of part 2 Patent applicant: Daishin Suisan Co., Ltd. Agent: Kama 1) Bun 2

Claims (1)

[Claims] A method for transporting live fish, which is characterized by placing live fish in a streamlined, spindle-shaped, or similar-shaped cloth cage and towing the fish underwater.