JP2001275515A - Structure for preparation of sea weed bed - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure for the preparation of sea weed bed capable of easily forming a wide sea weed bed area for its light weight and giving decreased open space in the sea weed bed area. SOLUTION: Posts 3 are erected at four corners of a concrete base 2 having a square frame shape. A rope 4 is wound around the four posts to encircle the outer side of the posts. A seed thread 5 supporting the spore of sea weed is spirally wound around the rope 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for creating a seaweed bed which actively creates a seaweed bed centering on seaweed and thereby realizes an undersea environment capable of promoting the propagation of fish and shellfish.

[0002]

2. Description of the Related Art At present, the promotion of coastal fisheries is an important issue in Japan, and the propagation and cultivation of fish and shellfish and seaweed are being actively developed. Seagrass beds have disappeared due to various causes such as rising and environmental pollution, and the number of fish and shellfish that used to live there has been drastically reduced.

[0003] In order to regenerate seaweed beds in such seashores and to build seaweed beds in sand and muddy areas, it is necessary to artificially introduce seaweed. Conventionally, concrete blocks and natural stones have been used. Has been put into the seabed, and the concrete shape and subsidence of concrete blocks have been devised. Also, as shown in Japanese Patent Application Laid-Open No. 8-322423, a supporting piece is protruded from the surface of a plurality of pillars erected on a concrete base, and spores, larvae, mature bodies or creeping roots of seaweed seeds are mounted on the supporting piece. Such algae are attached to the seabed and settled on the sea floor, or as in Japanese Patent Application Laid-Open No. 2000-060353, a culture rope in which seaweed seedlings are grown spirally on the surface of a pillar standing on a concrete base. It has also been proposed to wrap it around the sea floor.

[0004]

However, simply throwing concrete blocks or natural stones into the seabed is not enough to grow the seaweed beds, and it requires a large amount of cost using large trucks and large cranes. The effect was extremely small. Further, Japanese Patent Application Laid-Open No. 8-322423
In the method of JP-A No. 2000-060353, the seaweed bed area is limited to the vicinity of the pillars in spite of the weight of the concrete base. Therefore, the cost-effectiveness ratio is not sufficient, and the space between the pillars is open to the outside. It is not always good as a habitat for fish and shellfish because of the large space left.

[0005] The present invention has been made in view of these problems, and an object of the present invention is to form a seaweed bed area easily and widely in spite of its weight, and to provide a large space open to the outside in the seaweed bed area. An object of the present invention is to provide a structure for creating a seaweed bed that does not remain.

[0006]

According to the present invention, there is provided a structure for seaweed bed creation, comprising: a base for submerging on the seabed; a plurality of columns erected on the base; and a plurality of columns. And a rope wound around the outside thereof and carrying the seaweed spores or their grown bodies on the surface thereof.

As a method of supporting the seaweed spores and their grown bodies on the rope surface, for example, there is a method of spirally winding a seed yarn carrying the seaweed spores and the grown bodies along the longitudinal direction of the rope. .

Although the shape of the base is not particularly limited, a rectangular frame is preferable in consideration of the convenience in production and transportation.
In this case, the columns are to be erected at least at the four corners of the base.

As a method of winding the rope, for example, a plurality of ropes are wound around a plurality of columns in parallel with each other and in multiple stages, or one rope is spirally wound around a plurality of columns. It is possible to adopt a configuration in which

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows a structure 1 for constructing a seaweed bed according to the present invention. The structure 1 has a square frame-like concrete base 2 for submerging on the seabed. At the four corners of the base 2, pillars 3 are erected, and three ropes 4 are wound around three pillars (upper, middle, lower) in parallel at equal intervals and horizontally so as to surround the outer sides of the pillars 3. Have been.

As the material of the column 3, a material obtained by peeling the skin of a natural tree such as a thinned wood, or a wood processed into a predetermined cross-sectional shape is particularly preferable in terms of manufacturing cost, environmental protection, and the like. Depending on the sunk area, bamboo and the like may be selected. Even if they rot, they rarely cause environmental pollution. It is of course possible to use synthetic resin pipes such as large vinyl pipes, concrete, iron pipes and the like. The length of the column 3 is appropriately determined according to the water depth of the sea area in which the structure 1 is laid and the type of seaweed. In any case, the length is determined so that the upper end of the column 3 has a depth that does not damage the bottom of a fishing boat or the like.

Each rope 4 can use a natural fiber rope such as a commercially available cotton rope or hemp rope, or a synthetic fiber rope such as polyester. The thickness of the rope 4 is not particularly limited. From the viewpoint of easiness and strength, a material having a diameter of about 20 to 80 mm is preferable. Also, the rope 4 does not need to be new, and it is possible to use used ropes such as winding nets, bottom nets, crab basket nets and the like used in general fishing as long as they have sufficient strength. Therefore, it is desirable to actively use these waste nets. When there is a possibility that each rope 4 may be displaced in the vertical direction with respect to the support 3, a horizontal groove for engaging the rope 4 is formed on the surface of the support 3,
The rope 4 may be fixed to the column 3 using an appropriate locking member such as a nail, a bolt, a screw, or a pin, or an adhesive.

On the surface of the rope 4, a seed thread 5 much thinner than the rope 4 is spirally wound as shown in an enlarged view in FIG. The number of the seed yarns 5 is one in FIG. 2, but a plurality of the seed yarns 5 may be spirally wound. Seaweed spores are evenly attached to the seed thread 5, and the seed thread 5 is wound around the rope 4 before or after the rope 4 is wound around the column 3. Seed thread 5
May be wound on the rope 4 immediately after the seaweed spores are attached, or the seed thread 5 to which the seaweed spores are adhered is cured in a seawater tank on land for a predetermined period to grow the seaweed spores to some extent. May be wound around. In the twisting process during the manufacture of the rope 4, one or more seed yarns 5 may be co-twisted so as to be exposed on the surface of the rope 4 and integrated with the rope 4. The seaweed spores may be attached to the seed thread 5 or to the rope 4 itself.

The surface of the rope 4 or the seed thread 5 may be previously coated with a suitable algae paint to promote the formation and growth of seaweed spores.

The above-described structure 1 for constructing a seaweed bed is constructed on land, transported by sea to a target sea area, and settled on the seabed using a shipboard crane or the like so that the base 2 is substantially horizontal. In the structure 1 submerged on the seabed, when the seaweed is growing, the young body 7 of the seaweed starts to grow around the seed thread 5 of the rope 4 as shown in FIGS. The seaweeds grow densely, and the columns between the pillars 3 become like dense forest walls of seaweed, and the space open to the outside is reduced, so that the inside of the structure 1 becomes a good place for fish and shellfish, and the propagation of seafood is promoted. .

Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications are possible. For example, as shown in FIG. In addition to winding, any number of ropes other than three may be wound in multiple stages, or one rope 4 may be spirally wound around the column 3 as shown in FIG. Further, a configuration in which the columns 3 are cross-linked may be added. The base 2 may be a simple cube or a rectangular parallelepiped, a polygon such as a cross, a hexagon, or an octagon, or a circle, in addition to the rectangular frame made of concrete as in the above embodiment. The base 2 may have a structure that also serves as an artificial fishing reef, and may be made of any material other than concrete, such as natural stone, that can be laid on the seabed. The number of the columns 3 is not limited to four, but may be an arbitrary number of three or more, and can be appropriately changed according to the convenience of the formation of a seaweed bed.

[0018]

According to the present invention, as described above, a rope carrying seaweed spores or their growth bodies on the surface is wrapped around the outside of a plurality of pillars erected on the base. Due to the seaweed, the struts become like dense forest walls, so that the space inside the structure for seaweed bed creation can be a good place for fish and shellfish to promote the breeding of fish and shellfish. Further, the present invention has a higher ratio of the growing seaweed bed area to the total weight of the structure than a conventional seaweed bed construction structure in which a culture rope is simply wound around a support, and accordingly, the lightweight and compact structure of the seaweed bed construction structure is correspondingly reduced. And cost reduction, and by reducing the weight and size, the total cost of transportation up to the seabed can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a structure for creating a seaweed bed according to an embodiment of the present invention.

FIG. 2 is an enlarged view of a rope.

FIG. 3 is a perspective view of a structure for creating a seaweed bed according to a modified example of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seaweed bed construction structure 2 Base 3 Prop 4 Rope 5 Seed thread 6 Seaweed spores etc. 7 Juvenile of seaweed

Claims (5)

[Claims] 1. A base for submerging on the seabed, a plurality of pillars erected on the base, and wound around the plurality of pillars so as to surround the outside thereof, and a seaweed. A structure for constructing a seaweed bed, comprising: a rope having spores or a grown body thereof supported on the surface. 2. The structure for seaweed bed creation according to claim 1, wherein a seed thread carrying seaweed spores or a grown body thereof is spirally wound along the longitudinal direction of the rope. . 3. The base according to claim 1, wherein the base is in the shape of a rectangular frame, and columns are provided at four corners of the base.
The structure for creating a seaweed bed according to the above. 4. The seaweed bed construction structure according to claim 1, wherein the plurality of ropes are wound around the plurality of columns in parallel with each other and in multiple stages. 5. The structure for seaweed bed creation according to claim 1, wherein one rope is spirally wound around a plurality of pillars.