JP3044065U - Artificial fish reef to which algae easily attaches - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To increase the attachment rate of natural algae floating in the sea and to arrange artificial algae surrounding the natural algae, which is suitable for habitation and spawning of seafood. To provide an artificial fish reef capable of forming an environment. SOLUTION: A blow-off weight block which is placed on the seabed and has an opening on its peripheral surface; a member fixed near the center of the blow-off weight block, to which natural algae in water easily attaches A means was adopted that includes an algae-attaching member having a concavo-convex portion and having a through hole formed therein; and an artificial algae arranged so as to surround a natural algae attached to the algae-attaching member. [Effect] By producing a synergistic effect of natural algae and artificial algae, an artificial fish reef with an ideal environment for seafood can be obtained.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention can improve artificial fish reefs, and more specifically, can increase the rate of attachment of natural algae floating in the sea. The present invention relates to an artificial fish reef that can form an environment suitable for spawning.

[0002]

[Prior art]

 In shallow water where ridges such as reefs, banks, seamounts, and plateaus are formed in the sea, ocean currents collide with the ridges, causing upwelling and eddy currents and active vertical mixing of seawater. By this vertical mixing, a large amount of inorganic nutrients in the sea rises to the surface layer, promotes the reproduction of phytoplankton on the surface layer, attracts zooplankton and small fish that feed on it, and further Since the shaped fish come and come to stay, such waters near the shallows are suitable fishing grounds.

However, since the shallow waters in the sea such as reefs and deposits as described above are formed over a long period of time due to the coincidence of crustal movements and submarine volcanoes, natural reefs, etc. There are not so many in coastal areas.

From the above, many artificial fish reefs artificially forming an environment similar to a natural reef have been proposed. Since this artificial fish reef is usually molded with a concrete block into a frame-shaped or box-shaped rectangular parallelepiped with few irregularities, even if natural drifting algae floating in the sea arrive near the man-made fish reef, the natural It is unlikely that the flowing algae will be caught and attached to the block surface of an artificial fish reef that is a rectangular parallelepiped with few irregularities. Even if natural algae in the sea adheres to the surface of the block, the surface of the concrete block is hard and flat, so the natural algae that adheres is often washed away by the ocean current, and the surface of the artificial fish reef block surface. Had a problem that natural algae in the sea were difficult to attach.

[0007] Therefore, there is a method of fixing an alga-plant-like artificial hair transplant body in place of the above-mentioned natural algae inside the artificial fish reef to establish forests. With this artificial hair transplant, it is possible to create bushes and spawning grounds inside the artificial reef. However, since the alga-plant-like flocked body is an artificial algae, it cannot be naturally used as a feed for zooplankton and small fish, and natural algae generate carbon dioxide gas based on nutrients such as nitrogen, phosphorus, and silicon in the sea. We cannot hope for the environmental purifying effects that would be obtained from ingestion and photosynthesis.

[0006]

[Problems to be solved by the device]

 The present invention has been made in view of the above problems of the conventional artificial fish reef, and an object thereof is to provide an artificial fish reef that can increase the attachment rate of natural algae floating in the sea. It is what

Another object of the present invention is to provide an artificial fish reef that can arrange an artificial algae around the attached natural algae to form an environment suitable for habitation and spawning of seafood. It is what

[0008]

[Means for Solving the Problems]

 The means adopted by the present inventors to solve the above technical problem will be described below with reference to the accompanying drawings.

That is, the present invention is a blow-out weight block which is placed on the seabed and has an opening on the peripheral surface; and a member fixed near the center of this blow-off weight block, It is configured to include an algae-attaching member having a concavo-convex portion to which natural algae easily attaches and having a through hole formed therein; and an artificial algae arranged so as to surround the natural algae attached to the algae-attaching member. It is characterized in that the above technical problems are solved by adopting the means of doing.

[0010]

[Embodiment of the invention]

 Hereinafter, the present invention will be described in more detail based on embodiments shown in the accompanying drawings. 1 is a perspective view of an artificial fish reef according to a first embodiment of the present invention, FIG. 2 is a side view of an artificial fish reef according to a first embodiment of the present invention, and FIG. 3 is a perspective view of an artificial fish reef according to a second embodiment of the present invention. FIG. 4 is a side view of the artificial fish reef according to the second embodiment, and FIG. 5 is a modified example in which a mesh artificial flock is fixed to the side opening of the artificial fish reef according to the first or second embodiment. It is a perspective view of the artificial fish reef in which members and artificial algae are omitted.

First, an artificial fish reef according to a first embodiment of the present invention will be described with reference to FIGS. 1 and 2. In the figure, what is indicated by reference numeral 1 is a blow-off weight block placed on the bottom of the shallow water in the coastal area. The blow-off weight block 1 is made of a concrete material to form a divergent quadrangular pyramid-shaped frame body, and each side of the quadrangular truncated cone-shaped frame body has a substantially rectangular opening 11. ... is provided and is in an open state. Further, four inverted U-shaped lifting gears 12, 12, ... Are fixed to the upper surface of the weight block 1, and the hooks of the hoisting crane are fixed to these lifting gears 12, 12 ,. An artificial fish reef can be sunk on the seabed by hooking it and moving it. Since the blow-off weight block 1 is formed in a flared shape, it has excellent stability and can be sufficiently used even in shallow water where the ocean current and waves are severe.

What is designated by reference numeral 2 is an algae adhering member for effectively adhering natural algae floating in the sea. In the first embodiment, the algae-adhering member 2 is made of a steel plate member 2a, and the plate member 2a is fixed to the center of the upper end of the blow-off weight block 1. The plate member 2a has a saw-toothed concavo-convex portion 21, on which natural algae in the sea is easily caught and attached. Each of the concave portions of the saw-toothed concavo-convex portion 21 is provided with a slit-shaped small through hole 22, 22 ... And a substantially rectangular large through hole is formed in the center of the plate member 2a. 23 are formed. When seawater flows into the internal space of the weight block 1 through the small through holes 22 and the large through holes 23, turbulent flow and eddy current are generated in the vicinity of the central portion of the weight block 1 and the seawater or the seabed is generated there. Since the nutrient salts of the plankton are collected in the vicinity of the center of the weight block 1 in search of the nutrient salts. Further, fibers or the like can be planted on the upper surface of the sawtooth-shaped concave convex portion 21 of the plate member 2a to further improve the catch of natural algae.

What is indicated by reference numeral 3 is an artificial algae arranged so as to surround the natural algae attached to the algae attachment member 2. The artificial alga 3 is composed of a rod-shaped base portion 31 and synthetic fiber hairs 32, 32, ... Radially planted in the base portion 31, and these synthetic fiber hairs 32, 32. ... is formed to resemble natural algae. The synthetic fiber bristles 32, 32, ... Are made of a corrosion resistant material, and as the corrosion resistant material, a polyolefin fiber such as polypropylene or polyethylene, a polyester fiber, a polyamide fiber (nylon) or the like can be used. In the first embodiment, four artificial algae 3 are suspended from the back side of the plate member 2a while symmetrically arranging the four artificial algae 3 ... It is fixed in the lowered state. As a result, an appropriate bush is formed near the center of the weight block 1, and each artificial algae 3 itself serves as a spawning ground for seafood.

Next, an artificial fish reef according to a second embodiment of the present invention will be described with reference to FIGS. 3 and 4. In the second embodiment, the form of the algae adhering member 2 for adhering natural algae in the sea is significantly different from that of the first embodiment. The algae adhering member 2 of the second embodiment comprises a lattice-shaped basket member 2b, and the basket member 2b is fixed to the center of the upper end of the blowout weight block 1. A plurality of stone-like solids 24, 24 ... (In this example, natural stones are used) are placed inside the basket member 2b, and these natural stones are the saw teeth of the first embodiment. The same function as the uneven portion 21 is fulfilled, that is, the function of effectively hooking and attaching natural algae in the sea to the surface of the natural stone.

Each of the gaps formed between the lattices 25 of the basket member 2b has the same function as the small through holes 22 · 22 ··· and the large through holes 23 of the first embodiment, that is, each gap between the lattices 25. Seawater flows into the inside of the cage member 2b through the gap, and turbulence or eddy current is generated near the natural stone inside the cage member 2b. As a result, in addition to the nutrient salts in the sea and the bottom of the sea remaining near the natural stone in the cage member 2b, natural algae in the sea adheres to the surface of the natural stone, so the inside of the cage member 2b is natural. It becomes a perfect feeding ground where both algae and nutrients exist, and a large amount of plankton is collected.

Further, four supporting portions 26, 26, ... Are projectingly provided on the upper portion of the lattice 25 of the basket member 2b, and these supporting portions 26 are blown off and connected to the four corners of the upper end of the weight block 1. There is. And, the same four artificial algae 3 ... as in the first embodiment are fixed to the supporting portions 26, 26 ... In a suspended state, respectively. The arrangement state is such that the cage member 2b is surrounded by ....

Finally, as shown in FIG. 5, the net-like artificial hair transplant bodies 4 and 4 are formed in the openings 11 on each side of the blowout weight block 1 of the artificial fish reef according to the first or second embodiment. It is also possible to make modifications such as fixing .... In FIG. 5, the algae-attaching member 2 and the artificial algae 3 ... of the first or second embodiment are omitted. The mesh artificial flocked body 4 is composed of a mesh body with synthetic fiber bristles planted on the surface thereof. As a result, even a very small egg that cannot be laid on the natural algae attached to the algae attachment member 2 or the artificial algae 3 can be laid on the reticulated artificial hair transplant body 4, and in the artificial fish reef of the present embodiment. The utility value as a spawning ground is further enhanced. In addition to that, even when an artificial fish reef is sunk in a shallow sea where the ocean current or waves are severe, the artificial flocking body 4 effectively weakens the flow from the outside of the weight block 1 and blows the weight block 1 from the outside. A good stagnation can be generated inside. Further, in FIG. 5, the reticulated artificial hair transplant 4 is fixed to the outside of the opening 11 on the side surface of the weight block 1, but the reticulated artificial hair transplant 4 may be fixed to the inside of the opening 11. It is also possible to fix the reticulated artificial hair transplant body 4 both outside and inside the opening 11 to further increase the spawning area and further enhance the flow reduction effect.

By the artificial fish reef of the present embodiment composed of the blowout weight block 1, the algae attaching member 2 and the artificial algae 3 ... The function of natural algae in the sea that is caught and attached to the irregularities of the algae attachment member 2 (immediately obtained by photosynthesis by ingesting carbon dioxide based on nutrients such as nitrogen, phosphorus and silicon in the sea) Simultaneously realizes the environmental purification action and the food of seafood, etc., and the function of artificial algae 3, 3 ... Surrounding this natural algae (that is, formation of bushes and spawning grounds). In addition, the functions of both of them function synergistically to provide an ideal environment for seafood.

The embodiment of the present invention is generally as described above, but the present invention is by no means limited to the above-mentioned embodiment, and various modifications are made within the scope of the “claim for utility model registration”. For example, although the algae-adhering member 2 of the present embodiment is formed into a plate shape or a cage shape, any shape may be used as long as natural algae in the sea is easily attached. It is also possible to form various shapes such as a sphere having a spine such as a sea urchin on the outer surface, and it goes without saying that such a modified mode also belongs to the technical scope of the present invention.

[0020]

[Effect of the invention]

 As described above with reference to the embodiments, in the present invention, since the uneven algae-adhering member is fixed near the center of the weight block that constitutes the artificial fish reef body, natural algae in the sea The algae-attaching member is easily caught by the irregular portions of the algae-attaching member, and the attachment rate of natural algae can be increased as compared with the conventional artificial fish reef. Therefore, the artificial fish reef to which many natural algae adhered becomes a perfect feeding ground for seafood, and the natural algae ingests carbon dioxide based on nutrient salts such as nitrogen, phosphorus, and silicon in the sea to perform photosynthesis. By doing so, an environmental purification action in the ocean can be obtained at the same time.

Further, in the present invention, since the artificial algae are arranged so as to surround the natural algae attached to the vicinity of the central portion of the artificial fish reef, the artificial algae causes the artificial algae to be generated near the central portion of the artificial fish reef. The artificial algae itself can serve as a spawning ground for seafood, as well as being able to form a suitable bush that can rest the survival instinct. Therefore, an artificial fish reef with an ideal environment for fish and shellfish can be obtained by producing the synergistic effect of the above natural algae and artificial algae.

[Brief description of the drawings]

FIG. 1 is a perspective view of an artificial fish reef according to a first embodiment of the present invention.

FIG. 2 is a side view illustrating the artificial fish reef according to the first embodiment.

FIG. 3 is a perspective view of an artificial fish reef according to a second embodiment of the present invention.

FIG. 4 is a side view illustrating an artificial fish reef according to a second embodiment.

FIG. 5 is a perspective view of an artificial fish reef in which a net-like artificial hair transplanter is fixed to an opening on a side surface of the artificial fish reef according to the first or second embodiment, and the algae-adhering member and the artificial algae inside are omitted. Is.

[Explanation of symbols]

 1 Blow-off weight block 11 Opening part 12 Lifting tool 2 Algae attachment member 2a Plate member 2b Basket member 21 Sawtooth-like irregularity part 22 Small through hole 23 Large through hole 24 Stone solid 25 Lattice 26 Support part 3 Artificial algae 31 Basic part 32 Synthetic fiber hair 4 Reticulated artificial hair transplant

Claims (6)

[Utility model registration claims] 1. A blow-off weight block which is placed on the seabed and has an opening on its peripheral surface; an uneven portion fixed near the center of this blow-off weight block and to which natural algae in water easily adheres. An artificial fish reef to which algae easily attaches, which is characterized in that it is configured to include an algae attachment member having a. 2. A blow-off weight block that is placed on the seabed and has an opening on its peripheral surface; a member fixed near the center of this blow-off weight block, to which natural algae in water adheres. An artificial fish reef to which algae easily attaches, which is characterized by having an algae attachment member having an easily formed uneven portion and having a through hole formed therein. 3. A blow-off weight block that is placed on the seabed and has an opening on its peripheral surface; a member fixed near the center of this blow-off weight block, to which natural algae in water adheres. And an artificial algae arranged so as to surround a natural alga attached to the alga-adhering member and an alga-attaching member having a through hole formed therein; Artificial fish reef that easily attaches algae. 4. A blow-off weight block that is placed on the seabed and has an opening on its peripheral surface; and a plate member fixed near the center of this blow-off weight block, to which natural algae in water adheres. An algae-adhering member having a saw-toothed concavo-convex portion that is easy to perform, and a small through-hole formed in the concave portion of the saw-toothed concavo-convex portion and a large through-hole in the substantially central portion of the plate member; An artificial fish reef to which an algae is easily attached, which is characterized by including an artificial algae arranged so as to surround a natural algae. 5. A blow-out weight block that is placed on the seabed and has an opening on the peripheral surface; and a lattice-shaped basket member fixed near the center of the blow-off weight block, which is a natural material An algae-adhering member in which irregularities to which algae are likely to adhere are formed of a stone-like solid placed inside a cage member, and through holes are formed in the gaps between the lattices of the cage member; An artificial fish reef to which an algae is easily attached, characterized by being configured to include an artificial algae arranged to surround the attached natural algae. 6. A blow-off weight block that is placed on the seabed and has an opening on its peripheral surface; a member fixed near the center of this blow-off weight block, to which natural algae in water adheres. An algae-adhering member having an easy uneven portion and having a through hole; an artificial algae arranged so as to surround a natural algae adhering to the algae-attaching member; an opening on the peripheral surface of the blow-off weight block An artificial fish reef to which algae easily adheres, which is characterized in that the artificial fish reef is fixed to a portion of the reticulated artificial flocked body.