JP4489706B2 - Seaweed breeding reef - Google Patents

Description

  The present invention relates to an algae-bed breeding reef for cultivating algae suitable for the growth of organisms that are arranged on the seabed or lake bottom and that inhabit underwater, and create algae beds.

  Conventionally, as an algae pond breeding reef that propagates algae for use as a fish reef, there are natural rock pits, tetrapots and concrete blocks, or those in which these concrete products are stacked or natural stones are arranged between them. Has been used. Recently, mainly in the sea area, a so-called burning phenomenon in which algae are killed due to various causes such as changes in water temperature, water quality or food damage has become a major problem. Also, soft algae are gradually replaced by hard algae, and useful algae are locked out, or the formation of lime algae causes the surface of the reef to be covered with very hard calcareous material, which makes it difficult for new algae to grow. There is also a problem. Because of these problems, the regeneration and new creation of seaweed beds that have disappeared due to the burning of firewood has become an urgent issue.

  The ideal way to create a seaweed bed is to regenerate marine forests if a large number of natural boulders, such as the roots of algae grown to the extent that they are not damaged by vegetative organisms, can be introduced into the firewood burning area. However, considering the time and effort required to find a megalith settled by such algae and the time and expense required to transport the megalith, this method is ideal and impossible in practice. .

Therefore, for example, as shown in Patent Document 1, an algae fixing body and seafood collection body for measuring algae colonization and seafood collection is installed on a caisson footing, and a chestnut stone is placed in the algae fixing body and seafood collection body. Attempts have been made to restore or regenerate seaweed beds and fish reefs by packing gabions filled with algae fixing materials such as oyster shells and oyster shells.
JP 2004-68379 A

  However, in the case of such a configuration, the algae-fixing and seafood assemblage is filled with gabions inside, so that a large heavy machine or a trolley is required for installation on the footing. In other words, the algae anchorage and seafood collection must be stably placed on the footing until the algae settle and at least a sufficiently large algae field is formed. It is necessary to make the algae colony and seafood collection itself of sufficient weight, or to increase the weight of the gabions packed inside. In this way, by using a heavy object, it is difficult to carry it by a relatively small boat such as a fishing boat and manually perform the installation work. Therefore, it may not be worth the cost, work efficiency, and the size of the seaweed beds to be created.

  Also, when the algae begin to settle in the algae colonies and seafood assemblages, that is, when the algae are in the state of shoots that are not sufficiently grown, If you gather in a collection, the algae that have started to settle may not grow. As a result, it took a long time for the algae ground to be formed by the algae colony and seafood assemblage, or the algae that started growing disappeared, which could not become a seaweed place. .

  Therefore, in view of such problems, the present invention does not require a large-scale device for installation, and further prevents the contact of algal-eating fish and can reliably grow algae. Is to provide.

That is, the algae breeding reef of the present invention is for forming an algae plot placed on the bottom of the water, a growing member capable of growing and energizing algae, and a holder that is lightweight enough to be carried artificially And a preventing means for preventing fish that eat algae from approaching the algae settled on the growing member, and the holder has a storage space that can store articles that cannot be moved. a housing portion which member is attachable to form, the blocking means and a mounting means for mounting surrounding the development member mounted in the housing part, housing part, the water formed in the reservoir non cage with a metal wire A side member comprising a frame, a horizontal bar fixed at a position that bisects the frame, and a net attached between the horizontal bar and a portion of the frame located below the horizontal bar , and as large as the frame side members It is formed by connecting the upper and lower surfaces member over the entire surface pitched net frame, blocking frame portion above the cross bar so as to allow the cover is blocking means sites attached to cultivate member and nurturing member The holding means is transported to an installation area in an unassembled state and assembled on a ship .

  If it is such, since a holder is lightweight and it is the structure which attaches a growth member to the holder, it can carry a holder easily and raises the work efficiency required for conveyance and installation. It becomes possible. In addition, since the fish is prevented from approaching the growing member attached to the holding portion of the holder by the blocking means, it is possible to prevent erosion by the fish that hinders the growth of algae.

  In order to reduce the weight of the holder and facilitate installation on the bottom of the sea or lake bottom, the storage part is a container that cannot store water, and the attachment means separates the growth member and the blocking means. What consists of a member is preferable. The container is not particularly limited in its shape, material, structure, etc. as long as it can store articles that cannot be moved and cannot store water. For example, the container has a box shape, and has a through hole in at least one wall forming the box shape, a container made of a plate material provided with a number of through holes such as punching metal, a flexible For example, a deformable steel bar is formed in a net shape. In particular, the container is preferably a ridge formed of a metal wire. Since such a container is lightweight, it is preferable that the article is made of a weight member that is light enough to be handled by a single person in the bag and gathers a predetermined amount so that the bag cannot move. . Examples of the weight member include stones, concrete pieces, and shells.

  As described above, when a container is used as a bag, specifically, the bag preferably includes a frame and a net stretched on the frame. In this case, in order to facilitate the attachment of the blocking means and simplify the configuration, a rod member is formed integrally with the frame so as to allow the blocking means to cover the portion where the growth member is attached. Some are preferred. In this case, examples of the blocking means include those made of a net.

  The present invention is configured as described above, can easily transport the holder, and can increase the work efficiency required for transportation and installation. In addition, because the blocking means prevents fish from approaching the growing member attached to the storage part of the holder, it can prevent erosion by fish that hinder the growth of algae, and can form an algae field at an early stage. it can.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

  The seaweed breeding reef 100 of this embodiment is arranged on the sea floor to form a seaweed bed. The algae breeding reef 100 has a growth member 1 capable of growing and energizing the algae SW, a holder 2 to which the growth member 1 is attached, and a fish that eats the algae SW approaching the algae SW that has been activated on the growth member 1. And a fish net 3 which is a blocking means for blocking the above.

  The growing member 1 is made of concrete and has, for example, a rectangular plate shape, and has an uneven portion 11 formed on the surface thereof, and a mounting hole 12 penetrating through the flat back surface is formed at substantially the center of the surface. It is. Specifically, the surface of the growing member 1 is formed with a rock-like uneven portion 11 that imitates a natural stone, and a protruding portion 13 for winding a thread with a spore attached thereto. A space for arranging the fixing member 4 is provided between them.

Prior to attaching the growing member 1 to the holder 2, the algae SW, for example, alame, is alive. As a method of survival of Eisenia to foster member 1 is, for example, JP 2001 - can be applied as described in 299133 JP. That is, in the method, first, a plurality of growing members 1 are attached to a rope, the ropes are fixed to a ridge floating in the sea, and the growing member 1 is suspended in the sea within a depth of about 3 m. At that time, each of the growing members 1 attached to the rope is suspended so that the surface having the concavo-convex portions 11 is substantially vertical. Although it is preferable to set the sea area where the coral is installed in the vicinity of the sea area where Alame grows naturally, it is not necessarily limited to this.

  When the spore of alame flowing on the tidal current adheres to the uneven portion 11 formed on the growing member 1, the alame grows by receiving sufficient sunlight and fresh seawater caused by the tidal current, and roots on the uneven portion 11 and takes root. . In this embodiment, in order to more reliably and quickly attach the larvae spores to the growing member 1, a thread (Cremona yarn) 7 on which the spores are previously attached is wound around the growing member 1.

  At this time, since the back surface of the growth member 1 on which the uneven portion 11 is not formed is substantially flat, the two growth members 1 are formed on the surface on which the uneven portion 11 is provided in a state where the respective back surfaces are combined. By tying the ropes of the book and restraining the ropes with, for example, a commercially available synthetic resin binding band passed through the mounting hole 12, the number of the growing members 1 twice that of the above-described method is suspended from the cage. You can also Herbivores such as sea urchins easily eat larvae's young leaves, so in order to grow the larvae to the point where it can not be eaten at one time, it is cultivated by such a hanging type, and then on the seabed The relocation will make it difficult for alame to suffer damage.

  The holder 2 includes a storage space SP that can store a weight member 5 that is an article that cannot be moved, and a container 21 that is a storage unit to which the growing member 1 can be attached, and is formed integrally with the container 21. And a mounting means 22 for the fish net 3 made of a bar member. In order to reduce the weight efficiently, the holder 2 in this embodiment is made of a round steel bar or a metal wire.

  The weight member 5 is not limited in material and shape as long as the weight member 5 is light enough to be handled by a single hand and can be moved by a predetermined amount so that the holder 2 cannot be moved. Such as stones, concrete pieces, and shells. The container 21 is produced by frames 21a and 21d made of steel rods having a substantially square shape, and nets 21b and 21g stretched on the frames 21a and 21d. The attachment means 22 is realized by using the portions of the frames 21a and 21d constituting the container 21. For convenience of illustration, the weight member 5 is omitted in FIG. Actually, the weight member 5 is placed almost completely in the container 21.

  As shown in FIGS. 2, 3, and 4, the container 21 has a side surface of the container 21 formed by four side members 21c having a net 21b formed by braiding metal wires in the lower half of the frame 21a. One upper mounting member for the upper and lower surface members 21e having a net covering the entire surface of the frame 21d having the same size as the frame 21a of the member 21c is disposed along the upper edge of the net 21b of the side member 21c forming the side surface. The upper and lower surface members 21e for lower mounting are disposed and formed along the lower edge of the side surface member 21c forming the side surface. The side member 21c is a net 21b attached between a substantially square frame 21a, a horizontal bar 21f fixed at a position that bisects the frame 21a, and a portion of the frame 21a positioned below the horizontal bar 21f. It consists of. Further, the upper and lower surface member 21e includes a frame 21d equivalent to the side member 21c and a net 21g attached in connection with the four sides of the frame 21d.

  The storage space SP surrounded by the net 21b is formed in the lower half portion of the frame 21a of the side member 21c by combining the four side members 21c and the two upper and lower surface members 21e. The side members 21c, and the side members 21c and the upper and lower surface members 21e are coupled to each other by, for example, U-shaped bolts (not shown). The size of the meshes 21b and 21g stretched on the frames 21a and 21d may be determined in accordance with the size of the weight member 5 to be placed inside the bag which is a container formed by the meshes 21b and 21g. The size of a gabion can be mentioned. The frames 21a and 21d are, for example, round steel bars having a diameter of 16 mm or the like, and the metal wires forming the nets 21b and 21g are, for example, those having a diameter of 8 mm obtained by galvanizing iron wires. The metal wire may be made of stainless steel, as long as it has high resistance to salt and has strength to prevent the weight member 5 from flowing out.

  The container 21, that is, the dredger, may be configured such that the side surface member 21 c and the upper and lower surface members 21 e are transported to the installation site of the seaweed breeding reef 100 or the sea of the installation site in a single state, and assembled at that location. Therefore, the side surface member 21c and the upper and lower surface members 21e are relatively large by combining a plurality of seaweed breeding reefs 100, even if the transporting means is small by making the size capable of being mounted on a small fishing boat. It becomes possible to form a seaweed bed. In the assembled container 21 (籠), the upper and lower surface members 21e located above the net 21b of the side member 21c are the attachment parts of the growing member 1. Then, by assembling the container 21 (carp), the portion of the frame 21a that is located above the container 21 (carp) and the net 21b of the side member 21c is not stretched is the growth member 1 and the fish net 3 that is a blocking means. Functions as attachment means 22 for separating the two.

  The growing member 1 is attached to the metal wire forming the net 21g of the upper and lower surface member 21e for upper attachment attached to the horizontal bar 221f of the side member 21c with respect to such a container 21 (籠). Specifically, as shown in an enlarged view in FIG. 5, the fixing member 4 is placed between the concavo-convex portions 11 on the upper surface of the growing member 1, and the fixing member 4 and the metal wire forming the net 21 g are attached to the attachment holes 12. The growing member 1 is fixed to the net 21g of the upper and lower surface members 21e by being joined by the attachment wire 6 passed through the upper and lower surface members 21e. The growing member 1 is fixed to the metal wire constituting the net 21g. However, when the both ends of the growing member 1 are in contact with a metal wire other than the attached metal wire, the mounting posture does not change, that is, the upper and lower surfaces. In a state of being attached to the member 21e, the posture in which the upper surface of the growing member 1 always faces upward remains. In this way, a plurality of the growing members 1 are attached to the upper and lower surface members 21e for upper attachment. The attachment wire 6 can be a wire, a binding band made of synthetic resin, or the like.

  The seaweed breeding reef 100 is, for example, transported to an installation sea area by a small fishing boat, prepared for installation on the ship, introduced into the sea, and installed at a predetermined position on the seabed. That is, for example, the side surface member 21c and the upper and lower surface members 21e forming the holder 2 are loaded on the fishing boat in a state where they are not connected, that is, not assembled. And after a fishing boat arrives at an installation sea area, each frame 21a is connected with a U-shaped bolt so that four side members 21c may become a rectangular tube shape, and then, on the lower end portion of frame 21a of side member 21c The upper and lower surface members 21e for attaching the lower part are similarly joined by U-bolts and assembled on the ship to produce the container 21 (２１). The produced container 21 (hull) is suspended in the sea through a roller like an anchor at the bow of a fishing boat by a rope.

  In this way, the remaining work is performed with the container 21 (hull) suspended from the bow. That is, first, the weight member 5 is placed in the container 21 (bag). The weight member 5 is inserted so that the seaweed breeding reef 100 has a sufficient weight so as not to be washed away by the tide, and since it is light enough to be handled by a single person, the container 21 (籠) can be easily used. The predetermined amount required can be satisfied.

  Thus, while preparing the container 21 (籠), the growing member 1 is attached to the upper and lower surface members 21e for upper attachment as described above. Then, after a predetermined number of the growing members 1 are attached to the upper and lower upper surface members 21e for upper attachment, they are carried to a predetermined position of the container 21 (hull) suspended from the bow and fixed using U-shaped bolts. In this way, the upper and lower members 21e for attaching the upper portion to which the growing member 1 is attached are attached to the horizontal bar 21f of the side member 21c, thereby closing the container 21 (籠).

  Since the attachment means 22 is formed by the frame 21a of the side member 21c above the container 21 (carp), the fishing net 3 is attached by the attachment means 22. That is, the upper half of the frame 21a of the side member 21c is located above the upper and lower surface members 21e to which the growing member 1 is attached. Therefore, when the fishing net 3 is attached by the attaching means 22 formed by these frames 21 a, the fishing net 3 surrounds each growing member 1 at a position separated from each growing member 1. Therefore, a space sufficient for algae to grow is formed above the growing member 1, and the algae-eating fish cannot approach the algae SW cultivated on the growing member 1 including the space. It will be.

  After attaching the fishing net 3 as described above, the seaweed breeding reef 100 is submerged in the seabed and installed at a predetermined installation location.

  In this way, the growing member 1 and the holder 2 are separated from each other, and the side member 21c formed mainly by the frames 21a and 21d and the nets 21b and 21g to such an extent that the holder 2 can be carried artificially. In addition, since it is formed by the upper and lower surface members 21e, it is not necessary to use heavy equipment or a trolley when transporting and installing, and therefore it can be easily installed without being restricted by the terrain near the installation location. Further, a weight member 5 made of a stone, a concrete piece, a shell, or the like is placed in the storage portion of the holder 2, that is, the container 21 (籠), and a gap is formed between the weight members 5. Therefore, it can be used as a habitat for shellfish such as abalone, and a farm for these shellfish can be formed.

  Moreover, since the growing member 1 attached to the holder 2 is surrounded and protected by the fishing net 3 attached by the attaching means 22 formed by the frame 21a, the algae-eating fish on the sea floor is attached to the growing member 1. It is possible to prevent contact with the settled algae SW and reliably prevent the growth of the algae SW from being delayed or disappeared.

  In addition, this invention is not limited to the said embodiment.

  As described above, the growing member is not limited to a concrete member, and may be a synthetic resin molded product, natural stone, shell, etc., as long as it is a material that can energize algae. It is not limited. However, in the case where a container that is a bag as in the above embodiment is used as a holder, a container having a size corresponding to the size of the mesh of the container is used. When attached by (1), the surface of the growing member on which the algae are settled always faces the surface of the sea so that the position cannot be changed by the mesh of the mesh. Furthermore, the growing member does not necessarily need a thread to which spores are attached prior to activating the algae, and the spore may be attached directly to the surface on which the algae are to be entrapped.

  The blocking means may be, for example, a thin plate having translucency and having a large number of through holes in addition to the fishing net. That is, the prevention means need not necessarily be in the form of a net, as long as it can prevent the algae-eating fish from coming into contact with the algae cultivated on the growth member and does not inhibit the growth of the algae.

  Further, the shape of the holder is not limited to the above-described embodiment, and various types are conceivable. However, the attachment part of the growing member is prepared on the upper surface of the container that accommodates the weight member, and the container What is necessary is just to comprise so that a prevention means can be attached spaced apart from the growth member attached to. In this case, the attachment means of the blocking means is preferably provided integrally with the container. However, the blocking means is composed of a bar member separate from the container, and the bar member is inserted into an attachment member provided on the container, for example, a pipe member. And may be configured to function by being fixed. Thus, when the attachment means is separate from the container, the attachment means and the blocking means may be integrated.

  In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

The perspective view of the embodiment of the present invention. The perspective view of the holder of the embodiment The front view of the side member of the embodiment. The top view of the upper-lower surface member of the embodiment. The perspective view which shows the attachment state of the growth member of the embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Growing member 2 ... Holder 3 ... Fishing net 22 ... Mounting means SP ... Storage space

Claims (3)

It is for placing on the bottom of the water to form a seaweed bed,
A growth member capable of cultivating and energizing algae;
A holder that is lightweight enough to be carried artificially,
And a blocking means for preventing fish that eat algae from approaching the algae cultivated on the growing member,
A storage portion in which the holder has a storage space in which an article that cannot be moved can be stored and the growth member can be attached, and an attachment that surrounds and attaches the growth member attached to the storage portion to the prevention means. Means and
The storage part is a cage that is formed of a metal wire and cannot store water,
A side member comprising a frame, a horizontal bar fixed at a position that bisects the frame, and a net attached between the horizontal bar and a portion of the frame positioned below the horizontal bar , and a side surface A frame above the horizontal bar to allow the blocking means to cover the part to which the growth member is attached, formed by connecting the upper and lower surface members that are netted across the entire surface of the frame of the same size as the member frame The part becomes an attaching means for separating the growing member and the blocking means ,
The seaweed breeding reef that is transported to the installation area and assembled on the ship without the holder assembled . 2. The seaweed breeding reef according to claim 1, wherein the article is made of a weight member that makes it impossible to move the cocoon by gathering a predetermined amount so that the article can be handled by a single hand in the cocoon. The seaweed breeding reef according to claim 1 or 2 , wherein the blocking means comprises a net .

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