JPH0360465B2 - - Google Patents

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 advantages such as a natural growing environment, no influence from stormy weather, no obstruction to marine transportation, and no 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.

In general, a large fishing boat equipped with a large power plant is required to sink a fish cage device to the seabed and 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 novel towed floating type aquaculture system that does not require coastal fishermen to do excessive work such as diving, and can be easily operated by small coastal fishing boats without a power unit and even by elderly people. The present invention provides a fish cage device.

(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 extended 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 flexible intake hose that reaches the top.

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

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

A plurality of shelf boards 8 serve as landing boards for the abalone, and 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.

At each upper end frame 2A in the longitudinal direction of the box-like rod, a pair of cylinders 1 for floating and sinking are located below the cover plate 4.
1 are each extended 11A from the intake port side and are installed symmetrically. Both ends of the cylinder 11 are closed 12 respectively.
A flexible intake hose 13 is installed on the intake port side.
is connected to the rear end side 11B, and an open end water conduit pipe 14 is connected to the rear end side 11B. 15 is a weight.

The cylindrical body 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 is selected depending on the cylindrical body, and 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, a fourth
As shown in Figure 5, the mounting ear 17 is attached to the outside of the tube.
An appropriate attachment means is selected, such as integrally forming the upper and lower parts with a band 18 to fix the upper and lower parts to the frame.

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 rope.

(Function) Seed abalone (larval shellfish) that have grown to a predetermined size are stored in the cage and transported by sea to a suitable area for aquaculture.

When submerging this fish cage device, use the intake hose 1.
3 is floated on the sea surface with the end 13A closed and an anchor rope attached, and then the end of the intake hose is opened and released to the atmosphere. Seawater is introduced into the cylinder 11 through the water conduit 14, or the cylinder is Compressed by water pressure, the device sinks from the rear side 11B due to its own weight (FIG. 3) and lands on the bottom in the attitude shown in FIG.

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 FIG.

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

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

When casting bait into the fish tank, pull up the rope 26 connected to the guide buoy 25 at the site, pull up the intake hose 13, and connect the tip 13A to the cylinder 24 mounted on the small fishing boat 23 to supply compressed air. I care.

Air is introduced from the intake port side 11A of the cylindrical body 11, and the same volume of seawater is discharged from the water conduit 14 on the rear end side into the external seawater, or the cylindrical body is expanded.

As a result, the cage device always begins to float from the intake port side as shown in FIG. 3, and the seawater inside the cylinder is replaced with air, or the cylinder expands and floats above the sea surface.

As the water pressure decreases as it floats up, the air inside the cylinder expands, but excess air due to the expansion flows through the water conduit 14.
released into seawater. 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 it does not release more air than necessary, and the internal pressure inside the cylinder always matches the surrounding water pressure, so the fish pen oscillates. It floats stably without any turbulence.

When the device rises above the sea surface, pull out the tube net 7, throw bait such as seaweed into the fish cage from the feeding port 6, then push the tube net into the fish cage again, and release the pipe port of the intake hose 13 to the atmosphere. As a result, the sedimentation process described above begins.

When harvesting, all that is required is towing the floating cage device to the port, removing the lid plate and each shelf plate, and collecting the fish.

(Effects) The device of the present invention does not require the use of large power equipment for all operations from submerging, 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 meters or more, it can be installed in areas suitable for the cultivation of cultured organisms without being restricted in its installation location, resulting in high harvest efficiency.

[Brief explanation of drawings]

Figure 1 is a perspective view of the device of the present invention, Figure 2 is A-A.
3 is a diagram for explaining the use of the device, FIG. 4 is a partial side view of the embodiment device, and FIG. 5 is a sectional view of the main part thereof. 4 is a lid plate, 6 is a feeding port, 8 is a shelf board, 9 is a transparent space, 11 is a cylinder for floating and sinking, 13 is an intake hose, 14
is an open water pipe.

Claims (1)

[Claims] 1 A frame body formed in a box shape as a whole is provided with a net on at least each side, a lid plate having a feeding port is provided on the top surface, and a plurality of nets are provided inside the frame body parallel to the lid plate. A pair of floating and sinking cylinders are provided with removable floor shelves to constitute a fish tank, and are located below the lid plate and are located along both sides of the upper edge frame in the longitudinal direction of the frame body, with both ends closed. The body is attached with its distal end extending from its rear end, an open water conduit with a cone is connected to the lower part of the rear end, and the distal extension has a length that reaches above the sea level. A towed floating-type aquaculture cage device, characterized in that it is configured by connecting a flexible intake hose.