JP2004275027A - Method for creating seaweed bed and anchorage body used therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for creating a seaweed bed effectively utilizing ring-shaped holding tools for seaweed seeds and seedlings in creating the seaweed bed using the seaweed seeds and seedlings for transplanting and anchorage bodies fixing the holding tools for the seaweed seeds and seedlings to a structure for creation in various shapes. <P>SOLUTION: Circular cylindrical anchorage bodies 2 are suitably fixed to four corners at the top of a structure 1 for creation by a suitable binding means such as adhesion and the holding tools 3 for the seaweed seeds and seedlings in which the seaweed seeds and seedlings for transplanting are supported on the ring-shaped holding tools are fitted onto the anchorage bodies 2. The seaweed seeds and seedlings established therein function as a feed source for zoospores required for creating the seaweed bed. Since the holding tools 3 for the seaweed seeds and seedlings are fixed through the block-shaped anchorage bodies 2, the tools can be applied if the tools have a somewhat flat part. The range of the structure for creation to be the object is enlarged. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a technology for creating a seaweed bed (also referred to as a marine forest) centering on seaweeds that bring about the breeding of fish and shellfish and greatly contribute to improvement of the marine environment. The present invention relates to a technique for fixing a seaweed seedling for transplantation introduced from the outside to a construction structure.
[0002]
[Prior art]
At present, the promotion of coastal fisheries is an important issue in Japan, and the growth and cultivation of seafood and seaweeds are being pursued. However, in coastal areas, seagrass beds have disappeared due to various causes, and the seafood that uses seagrass beds as a place of life has declined dramatically. ing.
[0003]
Seaweeds generally settle on relatively shallow seabed rock surfaces and propagate there. However, the seaweeds are not environmentally friendly in the shore-burned sea area because the mother algae as a source of zoospores do not exist nearby, and the rock surface that forms the epiphyte is often covered with lime algae. Is very difficult to establish. Also, it is inherently difficult to grow seaweed in sandy muddy areas. Therefore, it is important to introduce seaweed from the outside in such a seaweed bed regeneration in the sea of scorched sea and in the construction of a seaweed bed in the sandy mud sea area.
[0004]
Conventionally, as a method of creating a seaweed bed, a structure such as a concrete block or the like (e.g., a “settlement substrate” or a “settlement base”) that has been variously devised so that it can function as an epiphytic bed for seaweed. In the specification, a "building structure") is installed, and the structure is generally formed after the seaweed has naturally settled on the surface of the structure. However, since these conventional methods rely on natural epiphytes through zoospores, the epiphytic state of seaweeds, which is particularly important in the early stage of development, is not only greatly influenced by uncertain natural factors, but also in seaweed beds. There was a fundamental problem in terms of development efficiency and certainty, such as the time required.
[0005]
Therefore, using seed seedlings performed in seaweed cultivation and the like, a thin twisted yarn on which seaweed larvae for formation are preliminarily wound is wound around a building structure such as a concrete block, and is settled in the sea. Attempts have been made to achieve a prosperous state through zoospores released from mature seaweeds that have settled on the surface of a building structure from the sea. However, this conventional method is not only difficult to fix the seed and seedlings to the construction structure, but also has an unstable condition after installation, and is applied to the construction structure installed in the sea. It was almost impossible. Also, even after installation, if there is any problem in the fixed state of the seedlings to the construction structure, thin seedlings that are unstable in shape in the form of thin threads, the deterioration of the fixed state from the problem point, There was a drawback that it easily dropped off. In particular, seaweed seedlings must be handled at the stage of very small juveniles because the seedlings themselves have little strength, and often they do not grow and grow smoothly after construction, and the success rate of creation is low. there were. For this reason, there are many problems in the above-mentioned method of directly applying seed and seedlings as a means for transplanting seaweed seeds and seedlings, and the fact is that practical use has not been advanced.
[0006]
A method has been proposed in which a substrate with a seaweed seedling in which a seaweed seedling for transplantation is preliminarily grown (supported) on the surface of a substrate made of an appropriate material, instead of the unstable seedling thread, is attached to the construction structure. (For example, see Patent Documents 1 to 3).
[0007]
In addition, from a different viewpoint, the present applicant comprehensively examines the production of seaweed seedlings for transplantation, the subsequent steps from mounting to the construction structure, and subsidence, the shape of the construction structure, etc. As a result, a ring (seaweed seedling support tool) with seaweed seeds prepared by supporting seaweed seeds on an annular member made of a suitable elastic material such as a synthetic resin was prepared, and this was attached to a pillar-shaped construction structure. A technique for creating a three-dimensional seaweed bed has already been proposed (see Patent Document 4).
[0008]
[Patent Document 1]
Full text of Japanese Utility Model Application Laid-open No. 63-155366 (specification page 2, Fig. 1)
[Patent Document 2]
JP-A-61-260818 (page 12, right column, line 12-page 2, left column, line 14)
[Patent Document 3]
Japanese Patent Publication No. 2-20221 (page 3, column 5, line 12-40, FIG. 3)
[Patent Document 4]
JP 2000-116256 A (page 4, column 6, line 10-40, FIG. 3)
[0009]
[Problems to be solved by the invention]
In the former method, the production of a substrate with seaweed seeds is carried out by first growing seaweed seeds on the surface of the substrate (supporting tool) in an aquarium on land, and then moving the substrate on which the young bodies have settled to the sea and culturing them. It is common to breed by hanging underwater from a marine facility such as a raft. However, in the settlement work in a water tank where the accommodation space is limited, since the plate-like holding tool is bulky, it is difficult to arrange a large number of substrates side by side in a limited space water tank, leaving an appropriate gap. This method is not very efficient. In addition, in the underwater breeding work performed by hanging the substrate on which the young body has settled in a rosary, a large difference occurs in the light environment between the upper substrate and the lower substrate where the shadow is formed, As a method for producing seaweed seeds for transplantation, there was a problem that yield was poor. In addition, it is necessary to provide a connecting means such as a bolt at a predetermined position on a building structure to which such a plate-shaped carrier is to be applied, and it is basically not applicable to an existing building structure. There were also problems.
[0010]
On the other hand, the ring with seaweed seeds used in the latter method has improved problems in the establishment and growth of seeds and seeds existing on the former substrate with seaweed seeds, and its utilization is greatly expected. However, since the ring-shaped carrier used here is formed by molding a synthetic resin into a thin plate, the ring-shaped carrier does not exhibit flexibility enough to be freely deformed in accordance with the outer shape of the mounting portion. For this reason, the construction structure basically requires an attachment portion having a cross section substantially the same as the inner shape of the ring-shaped support, and the application target is limited to a specific construction structure. Was left.
[0011]
The present invention has been made in view of these problems of the prior art, and focuses on a ring-shaped seaweed seed / seed carrier having excellent productivity and ease of handling as a transplanted seaweed seed / seed introduced into a target sea area at the time of construction. It is an object of the present invention to provide a method for constructing a seaweed bed by applying the method to structures having various shapes other than the columnar structure, and to provide a fixing body used therein.
[0012]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, a method for creating a seaweed bed according to the present invention includes a seaweed seed / seed carrier in which a seaweed seed / seed carrier is supported on a substantially annular carrier, and a seaweed seed / seed carrier supported through a fixing body that can be fitted to an outer peripheral surface. And the seaweeds proliferate around the seaweed seeds and seedlings transplanted to this construction.
[0013]
According to this method, the seaweed seeds carried on the substantially annular carrier are transplanted through a fixing body capable of externally fitting the seaweed seed carrier. It is possible to easily and reliably attach the structure to the building structure. In addition, there is an advantage that the mounting state thereafter is stabilized. As a result, the seaweed seeds can be effectively used as mother alga which is a core in the early stage of construction, where the mature seaweed seeds play a role as a source of zoospores, and the surface of the construction structure, Realizes overgrowth of seaweed in the surrounding area.
[0014]
In addition, as the fixing body used in the above method, a seaweed seed / seed carrier in which a seaweed seed / seed is carried on a substantially annular carrier can be fitted to the outer peripheral surface, and is stored in advance on a joint surface with the construction structure. It is preferable that the adhesive is connected to the building structure by flowing out of the adhesive, or that the bonding agent is connected to the building structure by binding a band-shaped member provided partially. The work of attaching these anchors to the construction structure can be, for example, fixed in advance to a required position of the construction structure on land near the construction site in advance, or can be fixed on a barge just before the sinking, Depending on the fixing means, mounting under the sea is also possible.
[0015]
In addition, the freshness of the seaweed seedlings decreases as the time of exposure to the air increases. When the seaweed seeds whose freshness is reduced in this way are applied, not only the growth of the seaweed seeds after construction is not performed smoothly, but also the survival rate has an adverse effect. Therefore, it is desirable that the work of fitting the seaweed seed carrier to the fixed body be performed at least on a barge immediately before submersion, or to be installed in the sea after the construction structure is first submerged in a predetermined place. In addition, such a seaweed seed carrier has an advantage that the seaweed seeds can be easily added or replaced when the growth state of the seaweed seeds is not good after construction.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
According to the present invention, the seaweed seed carrier can be attached to a required place with respect to various construction structures by using the fixing body to which the ring-shaped seaweed seed carrier can be fitted. Is simplified, and at the same time, the applicable range is expanded. As a result, the transplanted seaweed seeds carried on the carrier are firmly settled on the surface portion of the construction structure, and serve as a starting point of seaweed bed construction as a source of zoospores. Here, the shape of the fixing member may basically be adapted to the inner shape of the carrier, and for example, a short columnar body or a cylindrical body is suitable. Note that the shape of the fixing member and the fixing means for fixing the structure for creation are appropriately selected according to the shape and the mounting position of the structure for creation. Moreover, as a structure for construction, what is called a parallel reef formed in the shape of a lattice frame and other structures having various shapes can be applied, and the shape and material thereof are not particularly limited.
[0017]
Furthermore, it is desirable to apply algae paint on the surface of the fixed body, which is expected to have an effect of increasing the adhesion of zoospores supplied from the seaweed seed and seedling carrier and making the subsequent growth more reliable. It is preferable to similarly apply the algae nourishing paint to the surface of the construction structure. As the algae paint in this case, a paint mainly composed of a general chemical fertilizer may be used, but a photosynthetic bacterium according to the present applicant's proposal, a porous particle and a paint for improving the water environment comprising nutrient components of the photosynthetic bacterium. (See Japanese Patent No. 3175964) is particularly preferable. When this paint is applied, it is not only effective for the growth of transplanted seaweed seeds and seeds, but also maintains a high epiphyte rate of seaweeds through spores and provides nutrients necessary for the growth of seaweed for a long time. It can be supplied stably. Further, since various marine organisms are easily attached, a seaweed bed having various ecosystems is formed.
[0018]
In addition, as a carrier for supporting the seaweed seedlings, a flexible material such as a synthetic resin is used to form a substantially annular shape having one open portion, and the fixing member is expanded by widening the open ends. What can be attached from the lateral direction is preferable. Furthermore, a similar material is formed in a substantially band shape, and when it is attached to the fixing body, it is attached in a curved manner along the peripheral surface thereof, or is formed as a closed annular body. A device that is inserted and fixed from the upper end can also be used.
[0019]
By the way, as a method of growing seaweed seeds on the above-mentioned carrier, for example, a method generally used in seaweed cultivation or the like can be applied. That is, first, an adhesion base material such as seed seedlings suitable for adhesion of seaweed zoospores such as Cremona (trade name) is immersed in a water tank in which seaweed zoospores float, and seaweed zoospores are made to adhere to this and germinated. After that, when the seaweed larva becomes about several millimeters, the attached base material is directly attached to the string-shaped body such as a rope or hose by spiral winding, and immediately this is attached to a ring-shaped carrier. Attach so that Then, they are moved to the sea and hung from a raft on the sea to grow them. By this intermediate cultivation, the temporary roots of the seaweed larvae sufficiently adhere to the string-like body and the carrier, and the seaweed seed and carrier are integrated into a seaweed seed carrier. In this intermediate cultivation, the cultivation is performed until the cultivation reaches an appropriate size that can withstand transplantation. The size of the seaweed varies depending on the type of seaweed, construction time, environment of the creation area, and the like. For example, in the case of seaweed, it is generally desirable that the length of the leaf portion is about 50 cm to 1 m. The fixing of the cord-like body to the carrier is performed, for example, by forming a plurality of hook-shaped portions at predetermined intervals on the surface of the carrier which is outside when attached to the fixing body, and fitting the inside thereof, or separately using a fastener. Can be used to unite the carrier and the string-shaped body. As a kind of seaweed used in the present invention, a kind of seaweed, such as Alame, Scallop, and Kurume, is preferable because it has a high feed value and can form a large-scale seaweed bed called a marine forest. Above all, the vines are suitable for handling as in the present invention. Of course, the present invention is not limited to seaweed, and other types of seaweeds can be widely applied depending on the purpose of seaweed bed creation, such as when the focus is on the role of seafood as a spawning place.
[0020]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view of a method for creating a seaweed bed according to the present invention, which comprises a structure for creation 1, a fixed body 2, and a seaweed seedling support 3. The illustrated construction structure 1 is a cubic lattice frame-like concrete structure called a so-called row-type fish reef, and a seaweed seedling support 3 is attached to each of the four corners of the upper surface via a fixing body 2. . In the embodiment, a waste stone S is provided around the construction structure 1.
[0021]
FIG. 2 is a perspective view of the fixing body 2 used in the above embodiment. The fixing body 2 is provided with a carrying handle 22 on the upper surface of a low-concrete columnar body 21 made of concrete, and is fixed to the formation structure 1 by an appropriate connecting means such as brushing with an adhesive. In this case, the fixing position of the fixing body 2 is not limited to the four corners of the upper surface as described above, and the middle portion of each side on the upper surface side may be, of course, another portion such as a vertical portion in some cases. In addition, although drilling work is required, it is also possible to use a post-installed anchor having a wedge on both ends instead of the adhesive (for example, see Japanese Patent Application Laid-Open No. 9-217720) or the like.
[0022]
Next, the seaweed seedling support 3 used in the present invention will be described in detail. 3 and 4 are a front view and a plan view of the seaweed seed / seed carrier 3, respectively. In the seaweed seedling support device 3, the support device 31 is made of a synthetic resin having appropriate elasticity such as polypropylene, and is formed as a band-like ring partially open. Then, a short rope (string-like body) 33 on which the seaweed seeds and seeds 32 are formed is attached to the outer peripheral surface of substantially L-shaped receiving portions 31a provided at five places on the outer peripheral surface of the carrier 31. The artificial root of the seaweed seed and seedling 32 is extended and integrated with the carrier 31 by the above-described intermediate growing. The seaweed seedling 32 used here is a cultured seedling that applies a method used in seaweed cultivation or the like. That is, a seedling thread suitable for attaching zoospores such as Cremona (product name) is immersed in an aquarium in which zoospores of seaweed float, and zoospores of seaweed are attached to this and germinated. The seed and seedlings 33a grown to an appropriate size are spirally wound around a rope 33 as they are, attached to a carrier 31 and placed in the sea, and grown as a seaweed seed and seedling 32 to an appropriate size. .
[0023]
Then, after the construction structure 1 to which the seaweed seed carrier 3 having the above configuration is attached is installed on the seabed in the target area, when the seaweed seeds 32 carried by the carrier 31 mature, countless zoospores surround the seaweed seeds 32. And adhere to the surface of the nearby construction structure 2 or the waste stone S. The seaweed that grows here grows and releases zoospores as well. By repeating this, the growing range of the seaweed gradually expands, and a seaweed bed is formed. In this case, since the seaweed seed-bearing device 3 is fixed via the fixing body 2, it is not limited to a columnar structure as in the related art, but may be any structure having various shapes as long as it has a small flat portion. Can be applied to
[0024]
Next, FIGS. 5 and 6 show another embodiment of the fixing member according to the present invention. The fixing body 4 shown in the figure is made of a concrete cylindrical body 41 similarly to the above-mentioned embodiment, and has an adhesive 42 sealed in a concave portion provided at the center of the bottom surface thereof with a sealing material 43. In the embodiment, the handle 44 is provided inside the concave portion 45 formed on the upper surface so as not to hinder stacking. In the fixing operation of the fixing member 4, an appropriate lump 51 is placed at a predetermined position of the formation structure 5 having a flat portion, and the center of the bottom is aligned with the lump 51 and lowered from above. As a result, the sealing material 43 is broken and the adhesive 42 flows out, filling the space between the block 51 and the inner surface of the concave portion, and also wrapping around the bottom surface of the block 51, and furthermore, the bottom surface of the cylindrical body 41 and the building structure 5. Will penetrate between the surfaces and bind the three. Here, the shape of the lump 51 may be a shape having an acute angle portion on the upper portion so that the sealing material 43 is easily broken. The mounting operation of the seaweed seed / seed carrier on the fixing body 4 is the same as in the above-described embodiment.
[0025]
7 and 8 show still another embodiment of the fixing member according to the present invention, and are respectively a front view and a plan view. The illustrated fixing body 6 has a configuration in which a cylinder 62 is integrated at the center of one surface of a rectangular plate 61, and binding bands 63 are attached to four corners of the rectangular plate 61. Further, on the outer peripheral surface of the cylinder 62, a narrow fixing ring 64 capable of fixing a seaweed seedling support 7 described later by using projections 64a provided at two places is provided at a substantially intermediate height position. , And the surface thereof is coated with the above-described algae paint (not shown).
[0026]
FIG. 9 is a front view of a carrier used in an embodiment of another seaweed seed / seedling carrier applied to the fixing body 6. This carrying tool 71 is the same as the carrying tool 31 of the above-described embodiment with respect to a substantially L-shaped receiving portion 72, a substantially U-shaped bulging portion 73, a pair of handles 74 provided near the end, and the like. , End portions are different in shape. That is, at a position closer to the end than the pair of handles 74, a locking hole 75 is formed which can be engaged with the projection 64a of the fixing ring 64 fitted to the fixing body 6. Then, as shown in FIG. 10, by inserting a short rope (string-like body) 77 on which the seaweed seeds 76 have set, into substantially L-shaped receiving portions 72 provided at the five locations, The seaweed seed / seed carrier 7 in which the seaweed seed / seedling 76 and the carrier 71 are integrated is obtained.
[0027]
FIGS. 11 and 12 are a front view and a plan view, respectively, showing a method of using the fixing member 6. The construction structure 8 is a concrete structure in which three pillars are integrated so as to intersect with each other, and the two pillars 8a and 8b arranged in an X-shape are used for the construction. It is installed on the seabed such that the columnar body 8c arranged to straddle is located below. The fixing body 6 is fixed to the formation structure 8 by using a binding band 63 in a state where a rectangular plate 61 is applied to upper side surfaces of the two columnar bodies 8a and 8b. The seaweed seed carrier 7 is externally fitted to the fixing ring 64 of the fixing body 6, and is securely fixed by engaging the two hook holes 75 of the carrier 71 with the two projections 64a. . The mounting time of the seaweed seedling support 7 is not particularly limited, but when this fixing body is used, it is fixed as it is to an existing construction structure whose surface is contaminated with attached matter. Therefore, there is an advantage that the applicable object is widened as compared with the above-mentioned embodiment employing the bonding means.
[0028]
In each of the above embodiments, the shape of the seaweed seed / seed carrier is circular. However, other shapes may be used. Of course, various modifications within the technical idea of the present invention, such as a change in the shape of the present invention, are possible.
[0029]
【The invention's effect】
As described above, in the seaweed bed creation according to the present invention, by using a fixed body to which a ring-shaped seaweed seedling holding tool can be fitted, various types of construction structures are used as a source of zoospores. Seaweed seeds for transplantation, which are the starting point of seaweed bed development, can be easily attached to required places, and at the same time, the applicable range of the target construction structure is expanded, and its practical effect is Extremely large.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing an example of a seaweed bed creation method according to the present invention.
FIG. 2 is a perspective view of the fixing member shown in FIG.
FIG. 3 is a front view of the seaweed seed / seed carrier shown in FIG. 1;
FIG. 4 is a plan view of the seaweed seed / seed carrier shown in FIG. 3;
FIG. 5 is an explanatory view showing another fixing member fixing method according to the present invention.
FIG. 6 is an explanatory diagram showing a fixed state of the fixing body of FIG. 5;
FIG. 7 is a front view showing another embodiment of the fixing member according to the present invention.
FIG. 8 is a plan view of the fixing body shown in FIG. 7;
FIG. 9 is a front view showing another embodiment of the carrier used in the present invention.
10 is a plan view of a seaweed seed / seed carrier using the carrier of FIG. 9;
FIG. 11 is a front view showing an application state of the fixing body shown in FIG. 7;
FIG. 12 is a plan view of the application state shown in FIG. 11;
[Explanation of symbols]
1,5,8 ... construction structure, 2,4,6 ... fixed body, 3,7 ... seaweed seed carrier, 31,71 ... carrier, 32,76 ... seaweed seed, 42 ... adhesive, 63 ... Unity band

Claims (3)

A seaweed seed / seed carrier in which the seaweed seed / seedling was carried on a substantially annular carrier was attached to an appropriate place of the construction structure via a fixing body capable of being fitted to the outer peripheral surface, and was transplanted to the construction structure. A method for creating a seaweed bed, wherein seaweeds proliferate around seaweed seeds and seedlings. A seaweed seed-bearing tool in which seaweed seeds are carried on a substantially annular support tool can be fitted to the outer peripheral surface, and is bonded to the construction structure by flowing out of an adhesive previously stored on the bonding surface. Fixing body. A seaweed seed / seedling carrier in which a seaweed seed / seedling is carried on a substantially annular carrier can be fitted to the outer peripheral surface, and is joined to the construction structure by binding a band-shaped member provided in a part thereof. Fixing body.

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