JP2012005356A - Artificial fish bank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an artificial fish bank expressing a function as a fish bank for a long period of time, even when it is used in the sea influenced by tidal currents and waves.SOLUTION: Large numbers of bamboo branches 1 are used and net members 2 for preventing the bamboo branches 1 from flowing out are provided in the fish bank. The net members 2 are fitted up with the bamboo branches 1 and they stand on the water bottom B in a wall-like shape. Also, a frame body having a three-dimensional hollow structure is fitted up with the bamboo branches 1 and the periphery of the frame body is surrounded by the net members 2.

Description

  The present invention relates to an artificial reef.

  Conventionally, artificial reefs that are artificially submerged in water have been used for the purpose of providing a breeding place for fish and improving the living environment. As materials for artificial fish reefs, materials using wood such as cedar and cypress can be seen. However, wood becomes unusable in 1 to 3 years due to corrosion and corrosion damage such as beetle. Therefore, an artificial reef using bamboo instead of wood has been proposed (see Patent Document 1).

JP 2010-46054 A

  However, conventional artificial reefs are made of bamboo material with bamboo trunks divided in the vertical direction, and are submerged in a bundled bundle with ropes. In one to two years, there was a drawback that the rope that bundles the bamboo material was removed, the bundle collapsed, and the bamboo material was washed away. If bamboo material breaks apart, it will not be able to fulfill its function as a fish reef to maintain the habitat of fish, and the artificial reef must be repaired or replaced every few years after installation. There was a problem that not only labor was spent but also the cost increased.

  Therefore, an object of the present invention is to provide an artificial fish reef that continues to function as a fish reef for a long period of time even when used in a sea that is susceptible to tidal currents and waves.

  The artificial fish reef according to the present invention uses a large number of bamboo branches and includes a net member that prevents the bamboo branches from being washed away.

In addition, the bamboo branch is attached to the mesh member and is erected on the water bottom as a wall shape.
Further, the bamboo branch is attached to the mesh member and installed on the bottom of the water as a carpet.
Further, the bamboo branches are attached to a frame having a hollow three-dimensional structure, and the periphery of the frame is surrounded by the mesh member.
Further, the bamboo branch is attached to the mesh member, and the mesh member is covered around the frame of the hollow three-dimensional structure as an enclosed shape.

Also, a bamboo bundle is produced by bundling a predetermined number of bamboo branches, and a plurality of the bamboo bundles are sequentially assembled in a cross-girder shape to form a cross-girder structure, and the perimeter structure is surrounded by the mesh member It is.
Further, a predetermined number of the bamboo branches are surrounded by the mesh member to form an integral floating structure, and the floating structure is suspended at an intermediate depth in water.
Further, a predetermined number of the bamboo branches are surrounded by the mesh member to form an integral floating structure, and the floating structure is floated over the water surface from a position near the lower surface of the water surface.

  According to the artificial fish reef of the present invention, the bamboo branches can be securely held without being separated by the net member, so that the service life can be extended. In addition, by using bamboo branches, it is difficult to be damaged by beetle, etc., and does not rot in water, and can be used over a long period of 3 to 5 years. In addition, long and narrow bamboo branches can be gathered together to form a complex space, the structure can be made dense, a favorable habitat for fish and seaweeds can be provided, and the function as a fish reef can be exhibited effectively. . Furthermore, it is possible to utilize the remaining unnecessary bamboo branches and reduce the cost. In addition, it can contribute to the natural environment in terms of reusing plant resources that are discarded.

It is the perspective view which showed the 1st Embodiment of this invention. It is the perspective view which showed the 2nd Embodiment of this invention. It is the perspective view which showed the 3rd Embodiment of this invention. It is the perspective view which showed the 4th Embodiment of this invention. It is the perspective view which showed the 5th Embodiment of this invention. It is the side view which showed the 6th Embodiment of this invention. It is the side view which showed the 7th Embodiment of this invention.

Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments.
In general, an artificial reef is installed in water as a breeding place for fish, to maintain a safe living environment, or to make it easy for seaweeds to settle. Since fish use artificial reefs as shelters to protect themselves from external enemies, fish gather around artificial reefs. Artificial fish reefs are installed to make these fish easier to settle.
As shown in FIGS. 1 to 7, the artificial fish reef of the present invention includes a plurality of bamboo branches 1 and a net member 2 that prevents the bamboo branches 1 from being lost.
The bamboo branch 1 is obtained by cutting a thin branch separated from the main trunk (bamboo) of bamboo, and may or may not have leaves. Bamboo, which has been used less frequently in recent years, is increasing. Especially, even though the main executives are used as resources, the bamboo branch 1 is the most unusable and is discarded. Because there are many, it is a material that can be obtained inexpensively. Bamboo branch 1 has a hard epidermis and is not susceptible to damage by the beetle. Moreover, even if the bamboo branch 1 is submerged in seawater or brackish water for a long time, it does not rot easily. By gathering a large number of bamboo branches 1 ..., a complex space with many fine gaps is created, and the structure is dense. Artificial fish reefs with a dense structure are suitable for relatively small types of fish and fry, where they can hide from foreign enemies and are easily used as spawning sites. In addition, seaweeds are easy to settle, have a wave-dissipating effect, and have a function of preventing sand from flowing out. In addition, you may use the bamboo branch 1 with attaching to the main trunk | stem | part (ridge).
The net member 2 is made of a coarsely woven natural fiber, chemical fiber, wire or the like, and it is desirable to use a fishing net that does not deteriorate even when used in water.

FIG. 1 shows a first embodiment of the present invention.
The first artificial reef attaches the bamboo branch 1 to the net member 2 and stands on the bottom B as a (vertical) wall shape. The bamboo branches 1 are bundled together in a predetermined number to form a bamboo basket shape, and are bound (bound) in parallel as a plurality of bamboo bundles 10 to the belt-like net member 2. The net member 2 has fixing weights W, W attached to one side (lower end edge) 20 in the width direction, and floats F, F attached to the other side (upper end edge) 21. The net member 2 has one side (lower end edge) 20 fixed to the bottom B by weights W, W, and holds the bamboo branch 1 so that it does not fall apart due to a tide or wave. The bamboo bundle 10 is configured such that the structure gradually becomes more complicated and the outer diameter is diffused as it approaches the tip portion 11, and the tip portion 11 of each bamboo bundle 10 is arranged in parallel to one side 20 of the net member 2. Has been. Accordingly, the first artificial reef has a complicated and dense space in the vicinity of the water bottom B (one side 20 of the net member 2) where adjacent tip portions 11 and 11 overlap each other.

FIG. 2 shows a second embodiment of the present invention.
The second artificial fish reef has the bamboo branch 1 attached to the net member 2 and is installed on the bottom B as a carpet (substantially horizontal). Although the bamboo branches 1 are tied (bound) in a parallel manner as a plurality of bamboo bundles 10 to the belt-like net member 2, the points are the same as those in the first embodiment described above. The difference is that fixing weights W, W are attached to both sides 20, 21 in the width direction. The net member 2 holds both sides 20 and 21 with weights W and W, and holds the bamboo branch 1 so as not to fall apart due to a tidal current or a wave, as if lying on the bottom B.

FIG. 3 shows a third embodiment of the present invention.
In the third artificial fish reef, the bamboo branch 1 is attached to a frame 3 having a hollow three-dimensional structure, and the periphery of the frame 3 is surrounded by a net member 2.
In FIG. 3, the frame 3 is a metal frame having a cubic frame, but the material may be concrete, wood, or the like, and the structure may be more complicated. The bamboo branches 1 are accommodated inside the frame 3 or attached to the skeleton of the frame 3. Fixing weights W, W, and W are attached to the four corners of the net member 2 and are fixed to the water bottom B so as to cover the periphery of the frame body 3 to prevent the bamboo branch 1 from being washed away.

FIG. 4 shows a fourth embodiment of the present invention.
In the fourth artificial fish reef, the bamboo branch 1 is attached to the net member 2, and the net member 2 is covered around the frame body 3 having a hollow three-dimensional structure. Although it is common to the above-described third embodiment in that the frame body 3 is used, a net member 2 obtained by binding a predetermined number of bamboo branches 1... The difference is that the body 3 is covered. Fixing weights W, W, W are attached to the four corners of the net member 2 and are fixed to the water bottom B in a state of covering the periphery of the frame body 3 from above. The net member 2 holds the bamboo branch 1 so that it does not fall apart due to the tide or wave.

FIG. 5 shows a fifth embodiment of the present invention.
In the fifth artificial fish reef, a predetermined number of bamboo branches 1 are bound to produce a bamboo bundle 10, and a plurality of bamboo bundles 10 are sequentially assembled in a cross-girder shape to form a cross-girder structure 4. It is surrounded by the net member 2.
The well structure 4 is formed by assembling a plurality of bamboo bundles 10 in a substantially well shape in plan view. Specifically, a pair of bamboo bundles 10 and 10 are connected in series with the tip portions 11 and 11 facing each other, and two pairs of bamboo bundles 10 and 10 having a log shape are arranged in parallel, Two sets of log-like bamboo bundles 10 and 10 parallel to each other are placed so as to be orthogonal to each other. Furthermore, when the two sets of parallel log-like bamboo bundles 10 and 10 are stacked alternately so as to be orthogonal to each other, a substantially cross-shaped well structure 4 in a plan view is formed. The mesh member 2 having fixing weights W, W, and W attached to the four corners is fixed to the water bottom B so as to cover the periphery of the well structure 4 and the well structure 4 is held. The runoff of the bamboo branch 1 is prevented.

FIG. 6 shows a sixth embodiment of the present invention.
In the sixth artificial fish reef, a predetermined number of bamboo branches 1 are surrounded by a net member 2 to form an integral floating structure 5, and the floating structure 5 is suspended at an intermediate depth in water.
The floating structure 5 gathers a plurality of bamboo bundles 10 into a lump shape, and surrounds the periphery by the net member 2. The floating structure 5 hangs a rope connecting weights W, W, W for fixing so as to lower the ridge downward, and it is necessary to be able to confirm the position on the upper water surface A. Accordingly, the float F having buoyancy supporting the floating structure 5 is connected by a rope.

FIG. 7 shows a seventh embodiment of the present invention.
In the seventh artificial fish reef, a predetermined number of bamboo branches 1 are surrounded by a net member 2 to form an integral floating structure 5, and the floating structure 5 is floated over the water surface A from the position near the lower surface of the water surface A. ing.
The floating structure 5 gathers a plurality of bamboo bundles 10 into a lump shape, and surrounds the periphery by the net member 2. The floating structure 5 hangs a rope that connects a weight W for fixing so as to lower the ridge downward. A part of the floating structure 5 floats on the water surface A to form a floating island so that the position on the water surface A can be confirmed.

The use method (action) of the artificial fish reef of the present invention described above will be described.
As shown in FIGS. 1 to 7, an environment in which fish easily gather and settle is formed around the artificial reef. In particular, a large number of dense bamboo branches 1 have a complex and dense structure, and therefore, safety is ensured for a relatively small type of fish or fry, and it is effectively used as a spawning place. It is also effective as a place where seaweed grows, and plays an important role in protecting marine resources.
After the artificial fish reef is installed in the water of the sea or brackish water, the bamboo branch 1 is held by the net member 2 so that it does not fall apart due to tides or waves. That is, the role as a fish reef is demonstrated over a long period of 3 to 5 years, and during that time, it can be used without the need for repair or replacement.

  As described above, the present invention uses a large number of bamboo branches 1 and includes the mesh member 2 that prevents the bamboo branches 1 from being washed away, so that the bamboo branches 1 can be securely held without being separated by the mesh member 2. Therefore, the service life can be extended. Moreover, by using the bamboo branch 1, it is hard to be damaged by beetle and is not easily rotted in water, and can be used for a long period of 3 to 5 years. Moreover, the long and narrow bamboo branches 1 can be gathered together to form a complex space, the structure can be made dense, a favorable habitat for fish and seaweeds can be provided, and the function as a fish reef can be effectively exhibited. it can. Furthermore, the unnecessary waste bamboo branch 1 can be utilized and the cost can be reduced. In addition, it can contribute to the natural environment in terms of reusing plant resources that are discarded.

  Further, since the bamboo branch 1 is attached to the net member 2 and is erected on the bottom B as a wall shape, an eddy current effect and a shadow effect can be expected.

  In addition, since the bamboo branch 1 is attached to the net member 2 and installed on the bottom B as a carpet, the fishing net of the boat fishing method is not easily entangled. Moreover, many benthic fish can be collected.

  Moreover, since the bamboo branch 1 is attached to the frame body 3 having a hollow three-dimensional structure and the periphery of the frame body 3 is surrounded by the net member 2, a high fish collection effect can be exhibited and the fish can stay for a long time. In particular, the complex internal structure produces a shelter effect and is suitable for breeding fry. And it can install in the bottom B stably.

  In addition, since the bamboo branch 1 is attached to the net member 2 and the net member 2 is covered around the hollow three-dimensional frame 3 in a surrounding shape, a high fish collection effect can be exhibited and the fish can stay for a long time. it can. In particular, the complex internal structure produces a shelter effect and is suitable for breeding fry. And it can install in the bottom B stably.

  Further, a predetermined number of bamboo branches 1 are bundled to produce a bamboo bundle 10, and a plurality of bamboo bundles 10 are sequentially assembled in a cross-girder shape to form a cross-girder structure 4. Therefore, a high fish collection effect can be demonstrated and the fish can stay for a long time. In particular, the complex internal structure produces a shelter effect and is suitable for breeding fry. And it can install in the bottom B stably.

  In addition, a predetermined number of bamboo branches 1 are surrounded by the net member 2 to form an integral floating structure 5, and the floating structure 5 is suspended at an intermediate depth in water, so it has a habit of gathering in drifting objects. You can collect a lot of fish.

  Further, a predetermined number of bamboo branches 1 are surrounded by the net member 2 to form an integral floating structure 5, and the floating structure 5 is floated over the water surface A from the position near the lower surface of the water surface A. You can collect many fish with the habit of gathering things.

DESCRIPTION OF SYMBOLS 1 Bamboo branch 2 Net member 3 Frame 4 Well beam structure 5 Floating structure 10 Bamboo bundle A Water surface B Water bottom

Claims (8)

  An artificial fish reef using a large number of bamboo branches (1) and having a net member (2) for preventing the bamboo branches (1) from being washed away.   The artificial fish reef according to claim 1, wherein the bamboo branch (1) is attached to the net member (2) and is erected on the bottom (B) as a wall.   The artificial fish reef according to claim 1, wherein the bamboo branch (1) is attached to the net member (2) and installed on the water bottom (B) as a carpet.   The artificial fish reef according to claim 1, wherein the bamboo branch (1) is attached to a frame (3) having a hollow three-dimensional structure, and the periphery of the frame (3) is surrounded by the net member (2).   The artificial fish reef according to claim 1, wherein the bamboo branch (1) is attached to the mesh member (2), and the mesh member (2) is covered around the frame (3) having a hollow three-dimensional structure.   A predetermined number of the bamboo branches (1) are bound to produce a bamboo bundle (10), and a plurality of the bamboo bundles (10) are sequentially assembled in a cross-girder shape to form a cross-girder structure (4). The artificial fish reef according to claim 1, wherein the periphery of (4) is surrounded by the mesh member (2).   A predetermined number of the bamboo branches (1) are surrounded by the mesh member (2) to form an integral floating structure (5), and the floating structure (5) is suspended at an intermediate depth in water. The artificial fish reef according to claim 1.   A predetermined number of the bamboo branches (1) are surrounded by the mesh member (2) to form an integral floating structure (5), and the floating structure (5) is moved from the position below the water surface (A) to the water surface ( A) The artificial fish reef according to claim 1, wherein the artificial fish reef is suspended above.

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