JPH01231828A - Culture fish preserve device of towing, floating and sinking type - Google Patents

Abstract

PURPOSE:To enable aged people to readily handle in a small-sized coastal fishing boat not loading a power device by attaching a pair of specific cylinders for floating and sinking to a fish preserve having stretched a net on each side along both sides of an upper edge frame of the fish preserve. CONSTITUTION:Each upper edge frame 2A of a fish preserve device 1 which has stretched a net 3 at least on side and is provided with a cover plate 4 having feed holes 6 is symmetrically equipped with a pair of cylinders 11 for floating and sinking while extending each air intake side. Both the ends of the cylinders 11 are closed, the air intake sides are connected to a flexible air intake hose 13 and the rear sides are connected to a water feed pipe 14 of end opening and equipped with a weight 15.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an aquaculture cage device in which a cage housing settled aquatic animals such as abalone, turban shell, and spiny lobster is sunk on the natural seabed and floated above the sea surface during feeding.

(Background of the Invention) When cultivating abalone and the like in nearby waters, a submerged cage culture method is a possible effective aquaculture method.

That is, this aquaculture method has the advantages of providing a natural growing environment, being less affected by stormy weather, not interfering with marine transportation, and eliminating the risk of theft.

However, on the other hand, it is necessary to raise the fish cage to the sea surface each time bait is cast.

Generally, a large fishing boat equipped with a large power plant is required to sink a fish cage device to the seabed or raise it, and a small coastal fishing boat cannot operate it.

Therefore, even now, it is not common to commercially farm abalone and the like in the sea.

(Purpose) The present invention is a new towed floating aquaculture cage device that can be easily operated by small coastal fishing boats without a power unit and by elderly people without forcing coastal fishermen to do heavy work such as diving. It provides:

(Structure) The device of the present invention has a frame formed in a box shape as a whole, a net is stretched on at least each side surface, a lid plate having a feeding port is provided on the top surface, and the lid plate is provided inside the frame body. A plurality of shelf boards for landing in parallel with each other are removably provided to constitute a fish cage, and are located below the lid board and extend along both sides of the upper edge frame in the longitudinal direction of the frame body. A pair of closed flotation cylinders are installed with their distal ends extending from the rear end side, an open water conduit with a weight is connected to the lower part of the rear end side, and the distal end side extension is connected to the sea surface. It is connected to a visible intake hose that reaches the top.

(Example) The device shown in the figure is an example of an abalone culture cage.

(1) is a cage device, in which a box-shaped seawater corrosion-resistant frame (2) (2m x 1m x 0.5m) has nets (3) stretched on the sides and bottom, and a net (3) on the top. A lid plate (4) made of glass fiber reinforced plastic plate is removably attached with bolts (5). (6) is a bait opening to which a tube m (7) is fixed.

(8) is a plurality of shelf boards that serve as landing boards for abalone;
They are removably fixed in a symmetrical manner parallel to the lid plate and with a transparent space (9) formed in the center. <
10) is a leg part for bottoming.

Each upper edge frame (2A) in the longitudinal direction of the box-like rod has a pair of floating cylinders (11) located below the lid plate (4).
are installed symmetrically with their respective intake ports extended (IIA). Both ends of the cylindrical body (11) are closed (12), and a flexible intake hose (13) is connected to the intake port side, and an open end water pipe (IIB) is connected to the rear end side (IIB).
14) is connected. (15) is a weight.

The cylinder (11) may be a deformable tube such as a soft synthetic resin coated tube or a rigid body such as a hard PVC pipe.

Therefore, the attachment means (16) are selected depending on the cylinder,
In the case of a rigid body, for example, an annular attachment means made of metal or synthetic resin is used, and in the case of a flexible body, attachment ears (17) are integrally formed on the outside of the tube as shown in FIGS. 4 and 5. death,
Appropriate attachment means are selected, such as fixing the upper and lower parts to the frame by means of bands (18).

(19) is an extension of the upper edge frame and is provided with an anchor rope attachment hole (20).

(21) is a shackle, and (22) is an anchor lobe.

(Operation) Abalone seedlings (larval shellfish) that have grown to a predetermined size are stored in the cage and transported by sea to a site suitable for aquaculture.

When submerging this cage device, the end of the intake hose (13) (13A) should be closed and a bare anchorage attached to the sea surface, and then the end of the intake hose should be opened and released to the atmosphere. Seawater flows through the cylinder (11) through (14).
), or the cylindrical body is compressed by water pressure, and the device sinks from the rear side (IIB) due to its own weight.
) Land in the position shown in Figure 3 ■.

Since the angle of inclination when landing on the bottom depends on conditions such as tidal currents, it is desirable to form the rear end extension (19) of the upper edge frame as shown in FIG. 4 to prevent capsizing.

The fish cage is moored to an anchor (27) on the seabed in a direction parallel to the tidal current as shown in Figure 3 (■).

Fresh seawater flows into the cage through a mesh on the side, supplying oxygen to the abalone adsorbed on the shelf.

The spaces between the parallel shelves (8) and the transparent space (9) serve as guide passages for tidal currents, providing a suitable growing environment for abalone with good water flow.

When casting bait into the fish tank, use a guide buoy (2
Pull up the intake hose (13) through the lobe (26) connected to 5), and connect its tip (13A) to the cylinder (24) mounted on the small fishing boat (23) to supply compressed air. .

Air is introduced from the intake port side (IIA) of the cylinder (11), and the same volume of seawater is discharged into the external seawater from the water conduit (14) on the rear end side, or the cylinder is expanded.

As a result, the fish cage device always begins to float from the intake port side as shown in FIG.

As the water pressure decreases as the cylinder floats up, the air inside the cylinder expands, but excess air due to the expansion is discharged into the seawater through the water pipe (14). Note that at this point, air supply from the cylinder has already been stopped.

During surfacing, the water pipe hangs downward due to the weight 15), so no more air than necessary is released, and the internal pressure inside the cylinder always matches the surrounding water pressure, so the fish cage does not oscillate. It floats stably without any problems.

When the device rises above the sea surface, pull out the sub-assembly (7), throw bait such as seaweed into the fish tank from the feeding port (6), then push the sub-assembly into the fish cage again, and close the pipe opening of the intake hose 13). By releasing it into the atmosphere, it enters the sedimentation process described above.

At the time of harvest, the floating cage device is towed to the port.
Simply remove the lid plate and each shelf plate to collect.

(Effects) The device of the present invention does not require the use of large-scale power equipment for all operations from submergence to feeding and harvesting, and requires less labor than any conventional aquaculture method, and does not require any special equipment. This will provide a new aquaculture method that can be adopted by small-scale coastal fishermen.

Furthermore, since it can be installed on the seabed at a depth of 10 m or more, it can be installed in a suitable place for the cultivation of the cultured organisms without being restricted in its installation location, resulting in a high harvest efficiency.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the device of the present invention, FIG. 2 is a sectional view taken along line A-A,
FIG. 3 is an explanatory diagram of the use of the device, FIG. 4 is a partial side view of the embodiment of the device, and FIG. 5 is a sectional view of the main part thereof.

Claims (1)

[Claims] A frame is formed into a box shape as a whole, and a net is stretched on at least each side of the frame, and a cover plate having a feeding port is provided on the top surface, and a plurality of landing plates are arranged in the frame in parallel with the cover plate. A pair of flotation cylinders with removable shelf boards to form a fish cage, and which are located below the lid plate and have both ends closed along both sides of the upper edge frame in the longitudinal direction of the frame body. is attached with its leading end extended from its rear end,
An open water conduit with a weight is connected to the lower part of the rear end side,
A towed float-sinking aquaculture cage device, characterized in that a flexible suction hose with a length that reaches above the sea surface is connected to the tip side extension.