JPH0524277Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Field of industrial application] This invention is a kelp/sea urchin fish reef that is installed in the sea to create an artificial seaweed bed for the purpose of cultivating both kelp and the sea urchins that eat it. It is related to.

[Conventional technology] Traditionally, kelp reefs have been constructed by laying natural stones or concrete blocks directly on the seabed, net cages filled with natural stones, steel reefs, synthetic resin net pipes, etc. These included fish reefs built into box-shaped frames and placed on the ocean floor.

On the other hand, conventional sea urchin reefs are made of natural stones, broken stones, concrete blocks, fish reefs, steel reefs, etc., installed on the seabed, similar to kelp reefs, and are structurally similar to kelp reefs. They were named according to their purpose.

[Problems to be solved by the invention] The conventional techniques described above had the following problems.

As mentioned above, conventional kelp reefs and sea urchin reefs are
Since split natural stones, concrete blocks, and framed fish reefs are laid directly on the seabed, as the water depth increases, it is necessary to stack them in layers to a depth suitable for kelp propagation, which significantly increases costs. Ta.

In addition, in areas where the seabed is a sandy layer, chunks of broken stones, concrete blocks, box-shaped fish reefs, etc. are buried in the sand and become ineffective, so areas with a sandy layer are not suitable for fishing for kelp and sea urchins. It has hardly been used.

Kelp does not breed on surfaces such as rocks that have calcareous organisms attached to them, so in that case, cleaning such as scraping off the surface of the reef was required, but it cannot be easily pulled out of the sea with conventional structures. Therefore, it had to be cleaned underwater by divers and the like, which was extremely inefficient.

Moreover, in the conventional structure, kelp and sea urchins live in the same location, so if you are trying to cultivate kelp, the sea urchins that cause feeding damage are difficult, and in some cases, the sea urchins that cause feeding damage are difficult to cultivate. There was also a phenomenon in which sea urchins ate up young kelp, making it impossible for both kelp and sea urchins to reproduce.

The present application was made in view of the problems of the prior art, and its purpose is to provide a system that can do the following.

Rigid legs 1 with an appropriate length depending on the water depth
B: A structure with a permeable top plate 1A made of a concrete perforated plate or synthetic resin flat plate for breeding kelp, etc., and a shelf 1C for breeding sea urchins installed on the seabed 2. It is.

[Means for Solving the Problems] In order to achieve the above object, the present invention is as follows.

In other words, the device of the present application includes a top plate 1A that is composed of a porous flat plate with sufficient water permeability to reduce the force of waves and currents, and legs 1B that are suspended from the bottom surface of the top plate 1A. and a shelf 1C on the lower surface of the ceiling 1A that is stretched using legs 1B at a predetermined distance from the ceiling. In addition to forming an opening 1C1 to secure the sea urchin, the kelp and sea urchin reef has unevenness 1C2 formed on the surface so that young sea urchins can easily adhere to it.

In this case, the top plate 1A may be a porous concrete flat plate.

Also, a flat plate 1 for preventing subsidence is attached to the lower end of this leg 1B.
B1 can be installed.

Furthermore, a slope 1C3 for raising and lowering sea urchins that reaches the seabed 2 can be attached to the shelf 1C.

[Operation] The above members are assembled into the shape shown in Fig. 1, loaded onto a barge or the like, transported to the destination, and installed on the seabed using a crane ship or the like.

In the kelp and sea urchin reef according to the present invention,
The top plate 1A is located at the water depth most suitable for the propagation of kelp, and since the top plate 1A has sufficient water permeability, vortices are created by the tide, etc., and the kelp is always supplied with fresh seawater, which attracts sea urchins. Fresh seawater also reaches the top of shelf 1C.

In addition, since the top plate 1A and the shelf 1C are structured to moderately block direct sunlight, a convenient environment is created for fish to hide in order to protect themselves.

[Example of idea] Examples will be described with reference to the drawings.

1 is the kelp and sea urchin reef of the present invention.

2 is the seabed where this kelp and sea urchin reef 1 is installed.

1A is the top plate, which is composed of a porous flat plate with sufficient water permeability to reduce the force of waves and currents.

In this case, the ceiling should be made of a porous concrete flat plate.

1B is a rigid leg hanging from the lower surface of the top plate 1A, and its length is determined according to the water depth of the sea area surveyed in advance and the water depth suitable for the growth of kelp in that sea area.

In this case, a flat plate 1B1 for preventing subsidence can be attached to the lower end of this leg 1B.

Reference numeral 1C is a shelf, which is placed on the lower surface of the top plate 1A at a predetermined distance from the top plate using legs 1B.

The shelf 1C is hollowed out in the center to form an opening 1C1 to ensure sufficient water permeability, and also has an uneven surface 1C2 to facilitate attachment of young sea urchins.

In this case, a slope 1C3 for raising and lowering sea urchins that reaches the seabed 2 can be attached to the shelf 1C.

[Effects of the invention] Since the present invention is configured as described above, it produces the following effects.

1 Due to its structure, even when the water depth increases, the top plate 1A can be maintained at a water depth suitable for kelp growth by simply lengthening the legs 1B, so the increase in cost is extremely small compared to conventional construction methods.

This proposal allows kelp to grow quickly by determining the length of the legs so that the top plate is placed at the most suitable water depth for the propagation of kelp in the area where it is intended to be used.

2. In sea areas where the seabed is a sandy layer, even if the legs are slightly buried, the top plate and shelf where kelp and sea urchins live will remain underwater, so areas with sandy layers that have rarely been used in the past can be widely used. The economic impact of this is significant.

In particular, since the habitats of kelp and sea urchins are differentiated by adding steps to the top plate 1A and the shelf 1C, it is possible to harvest high-quality kelp that is not damaged by sea urchins.

3. Since it can be easily lifted out of the sea by a crane ship, even if it is contaminated with calcareous organisms that inhibit the growth of kelp, the surface can be easily cleaned and returned to the sea.

4. Sea urchins grow by eating hanging kelp and torn kelp, etc.
There is no such thing as eating up young, ungrown kelp and making it impossible for both sea urchins and kelp to reproduce.

In other words, fully grown, high-quality kelp can be harvested from the top shelf, and sea urchins that have grown by eating dangling or torn kelp can be harvested from the middle shelf.

5 When installing slope 1C3 for elevating sea urchins, the following effects can be expected.

Since the sea urchins can move up and down easily, they will also eat the kelp that has fallen around the reef, promoting the growth of the sea urchins.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the device in use. FIG. 2 is a plan view of the present invention. FIG. 3 is a partially cutaway front view of the present invention. 1...kelp/sea urchin reef, 2...sea floor, 1A...
...Top plate, 1B...Legs, 1B1...Flat plate to prevent subsidence, 1C...Shelf, 1C1...Opening, 1C2...
Unevenness, 1C3...Slope for elevating sea urchins.

Claims (1)

[Scope of claim for utility model registration] 1. Top plate 1A consisting of a porous flat plate with water permeability to reduce the force of waves and currents.
It consists of a leg 1B hanging down and attached to the lower surface of the ceiling 1A, and a shelf 1C extending from the lower surface of the ceiling 1A with a predetermined distance from the ceiling.
This shelf 1C is hollowed out in the center to form an opening 1C1 to ensure water permeability, and also has an uneven surface 1C2 to make it easy for young sea urchins to adhere to it. Fish reef. 2. The kelp and sea urchin fish reef according to claim 1 of the utility model registration claim, wherein the top plate 1A is a porous concrete flat plate. 3. The kelp/sea urchin fish reef according to claim 1 or 2 of the utility model registration claim, in which a flat plate 1B1 for preventing subsidence is attached to the lower end of the leg 1B. 4 Slope 1 for elevating sea urchins that reaches the seabed 2 on shelf 1C
A kelp/sea urchin fish reef according to any one of claims 1 to 3 of the utility model registration claims attached with C3.