JPS5947579B2 - Method and device for medicinal bathing in aquaculture “su” - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for directly performing a medicated bath in fish cages during fish cultivation.

Generally, in the cultivation of marine fish such as yellowtail and sea bream, fish cages surrounded by fiber nets or wire nets are widely used.

An important aspect of this fishing method is the growth rate, which is particularly affected by bacterial infection, which has been a problem.

As a countermeasure against this problem, various therapeutic and preventive agents have been developed by drug manufacturers, but the following problems arise in practical use, and the drugs have not been effective.

In other words, oral preparations added to the bait have poor drug administration efficiency because they are mainly fed to the healthy horn and are not administered to the important horn to be treated.On the other hand, medicinal bath agents that are absorbed from the carp (gills) are the most effective. It is said to be effective.

However, in the case of medicated bathing, it is difficult to sort and isolate the fish, especially when the fish get large like yellowtail, and even if sorting can be done, the work is time-consuming, and moving the fish is a cause of scratching symptoms on the fish body. On the other hand, there is a risk of weakening the fish, and as a result, the number of medicated baths will decrease as the fish grow, making it impossible to set the medicated bath conditions that can be obtained in the laboratory. The reality was that no medicinal effects could be obtained.

The present invention provides a medicinal bath method and apparatus for solving these problems.

That is, the present invention provides a medicinal bathing method in which a medicinal bath curtain 2 is hung in water so as to be installed inside the aquaculture net of a fish tank, completely surrounding a school of fish, and then spraying a medicinal solution, and a medicinal bathing method that has good air permeability and water permeability. It consists of a cylindrical medicinal bath curtain 2 and a chemical sprayer, and is characterized in that the lower end of the medicinal bath curtain is equipped with a sink attachment part, and one end thereof is equipped with a jig for fixing it to the outer peripheral frame of the fish cage. This is a medicinal bath device.

The medicinal bath curtain used in the present invention consists of a curtain divided into at least two pieces by easy-to-detach fittings.

The sea I is made of hydrophobic synthetic fibers and is woven with a density of at least 20 fibers per inch in both the warp and the weft.

Next, the medicinal bath method according to the present invention will be described in detail below in relation to the apparatus for carrying out the method, with reference to the drawings.

1 and 2 are perspective views of one embodiment of the present invention, with FIG. 1 showing the entire device and FIG. 2 showing an assembled view of only the medical bath curtain.

The apparatus for carrying out the method of the present invention is comprised of an aquaculture cage 1 formed by side walls and a bottom, a cylindrical chemical bath curtain 2 installed inside each side wall, and a chemical solution sprayer (not shown).

Furthermore, an oxygen (air) supply device will be installed as necessary.

This oxygen (air) supply device is supplied to appropriate parts of the aquaculture cage through a nozzle, but it may be omitted depending on the size of the cage and the usage conditions of the chemicals.

The sprayer for the chemical solution is selected depending on the drug, but a chemical solution of an appropriate concentration is prepared in advance and sprayed into a container or pump.

The medicinal bath curtain 2 is composed of a plurality of (four in this illustration) divided sheets 1-3, and each divided sheet 3 is fitted with joints 4 and dipsticks 5 that can be connected to each other, and the curtain is fixed. For example, an appropriate jig 6 such as an eyelet is provided for this purpose.

There are two methods for assembling the medicinal bath curtain 2 from the divided sheets 3 and installing it inside the fish tank.In one of them, each divided sheet 3 is introduced from the periphery of the fish tank, the upper part of the sheet is fixed, and then The other method requires more manpower than the previous method, but this method is a method in which the divided sheets are set by joining them with the joint 4 and the sediment is set. In this case, most of the work can be completed on the surface of the water, but with the previous method, it is necessary to go underwater and connect the parts.

As the material for Sea I, for example, knitted fabrics using synthetic fibers with high specific gravity, such as vinylidene chloride-based synthetic fibers, and properties such as hydrophobicity, weather resistance, and corrosion resistance, are suitable, and they are suitable for preventing oxygen deficiency. To avoid this, it is preferable not to use tissue that has been completely sealed with a waterproofing agent.

However, if the density is too rough, the drug will flow out, so this will be determined depending on the usage conditions of the drug, but as a result of various studies, it is preferable to have at least 20 meshes or more in terms of economical efficiency and medicinal efficacy.

Incidentally, the bottom part of the medicinal bath curtain 2 is not required in principle.

The fittings 4, 4' may be of a known type, such as a fastener, but any rust-free and simple connection or fitting may be used.

The sea salt 5 may be attached to the sheet in advance.

Further, the upper part can be easily fixed by simply attaching it to the fish cage frame 8 with the string 7, but it is convenient to further include a hoisting device.

According to the medicinal bathing method of the present invention, the medicated bathing can be performed without moving and isolating the fish bodies from the aquaculture cage, which not only significantly shortens the work time compared to the conventional method of catching and bathing the fish, but also weakens the fish. There is no risk of it happening.

Although there is a concern that the medicated bath curtain may flow out due to its water-permeable structure and lack of a bottom, it was found that under normal tidal current conditions, the medicated bath remained in the cage for about 30 minutes.

In addition, the chemical solution is dispersed by the migration of fish schools, and no stirring device is required.

Although one embodiment of the present invention has been described above, within the scope of the configuration of the present invention, for example, when a medical bath curtain is submerged in water,
Of course, it is also possible to install a device that narrows the curtain for the purpose of adjusting the bath ratio of the chemical solution.

[Brief explanation of drawings]

1 and 2 are perspective views of an apparatus for carrying out the present invention, and FIG. 3 is a partially cutaway plan view of a divided sheet constituting the medical bath curtain 2. FIG. 1...Aquaculture cage, 2...Medical bath curtain, 3...Divided sheet, 4,4'...
・Joint, 5...Sink, 6...Jig, 7
...String, 8...Frame wood, 9...
Float, 10... Anchor.

Claims (1)

[Scope of Claims] 1. A medical bath curtain 2 installed inside the aquaculture net of the fish cage.
completely surround the school of fish by suspending it in the water,
A chemical bath method 2 in an aquaculture cage in which a chemical solution is then sprayed.It consists of a cylindrical chemical bath curtain 2 having air permeability and water permeability and a chemical solution sprayer, and a sediment is attached to the lower end of the chemical bath curtain. A medicinal bath device for use in an aquaculture fish tank, characterized in that a jig for fixing to the fish cage outer peripheral frame is provided at the top and the top end. 3. The medical bath curtain is a woven sheet made of hydrophobic synthetic fibers and having a density of at least 20 fibers per inch in both the vertical and horizontal directions. medicinal bath device. 4. The medicinal bath device according to claim 2, wherein the medicated bath curtain is divided into at least two pieces by a removable fitting.