JP2007006768A - Artificial fishing bank and connected body of artificial fishing bank - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an artificial fishing bank which is effectively used by fishes as a hiding place, a rest place, a spawning ground and a feeding station and with which an existing fishing bank is expanded and a new fishing bank is constituted and a connected body of artificial fishing banks. <P>SOLUTION: The artificial fishing bank comprises a fishing bank main body 1a having a passing route for fishes and flange parts 1b which are arranged at the side end part of the fishing bank main body and stably keeps the fishing bank main body. The fishing bank main body 1a is equipped with through holes H. The artificial fishing bank has an arch-like route of a fishing bank main body and is equipped with a plurality of through holes in sizes for coming in and out of fishes. The artificial fishing bank is extremely stable in a connected state when the flange parts 1b are extended by fixed length from the front end of the fishing bank main body and are deleted by fixed length from the rear end. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to an artificial fish reef and an artificial fish reef connected body that are submerged in the seabed, lake bottom, riverbed, and the like, and fish preferably enter.
More specifically, the present invention relates to an artificial fish reef and an artificial fish reef linked body in which fish can be effectively used as a hiding place, a resting place, a spawning ground, a feeding ground, and the like.

  Conventionally, a rocky place protruding from the sea floor is called a natural reef and is a place suitable for gathering and raising fish.

In order to perform the same function as such a place, there is a method of submerging the structure made of concrete blocks etc. on the sea floor etc. to make a fish place, but in this case, since the structure is artificial, so-called `` It is called “artificial fish reef”.
The existence of artificial fish reefs generally improves the habitat for fish and is useful for expanding and creating new fishing grounds in addition to existing fishing grounds.

  Specific features of fish reefs include the ability to prevent the influence of water currents and easily become a hiding place, resting place, laying ground or feeding place, that is, having functions necessary for fish to live.

Incidentally, the hiding place is a place for prey fish to hide from a relatively large fish that feeds the fish, and the resting place is a place for the fish to rest away from the tide flow.
In addition, the reason why fish reefs play a role of spawning ground and feeding ground is that seaweeds necessary for spawning are easy to grow on fish reefs and that plankton is easy to ingest.

By the way, as an artificial fish reef actually developed, for example, a rectangular parallelepiped frame shape is widely known (see Patent Document 1 and Patent Document 2).
The artificial reef is submerged in the sea floor and used as a place for promoting the growth of fish. For example, the size of the artificial reef is several meters in length and several tons in weight (paragraph 0011 of Patent Document 1, Figure 2).

Japanese Patent No. 2695735 JP-A-8-140519

However, the conventional artificial fish reef described above has a complicated structure because it is generally shaped like a frame.
In particular, in the case of a product made of concrete, a mold to be used becomes complicated in manufacturing.
In addition, manufacturing costs are high due to the use of pipes and wires.
Furthermore, since the structure is complicated, when it sinks, it is easy to receive water resistance and positioning becomes difficult, and pipes and wires are easily deformed and it is difficult to maintain the original design shape.
It has many corners as a whole, is easily affected by tidal currents, and does not necessarily function effectively as a fish hideout, resting place, egg-laying ground and feeding ground.

The present invention has been made based on such a conventional background.
That is, the present invention provides an artificial fish reef and an artificial fish reef linking body in which fish can be effectively used as a hiding place, a resting place, a spawning ground and a feeding ground, and can expand an existing fishing ground or create a new fishing ground. The purpose is to provide.

  Thus, as a result of earnest research on the background of such problems, the present inventor can solve the above problems by making the artificial reef a simple shape using curved surfaces and planes. The present invention has been completed based on the finding and this finding.

  That is, the present invention includes (1) a fish reef body having a passage through which fishes pass, and a ridge for stably holding the fish reef body at the side end of the fish reef body, and fish enters and leaves the fish reef body. It exists in an artificial reef where a through hole of a possible size is formed.

  Further, the present invention resides in (2) the artificial reef according to (1), wherein the passage of the fish reef body is formed in an arch shape.

  The present invention also resides in (3) the artificial fish reef described in (1), wherein a plurality of the through holes are formed.

  Further, the present invention resides in (4) the artificial fish reef described in (1), wherein the through hole has a plurality of different shapes.

  The present invention also resides in (5) the artificial fish reef described in (1) above, wherein the arch-shaped passage has a smaller diameter in the longitudinal direction.

  Moreover, this invention exists in the artificial fish reef as described in said (1) by which the notch is formed in the said buttocks (6).

  In addition, the present invention resides in (7) the artificial fish reef described in (1) above, wherein the ridge is extended by a certain length from the front end of the fish reef body, and the ridge is lost by a certain length from the rear end.

  The present invention also resides in (8) the artificial fish reef described in (1) above, wherein a large number of shell fragments are projected from the wall of the fish reef body.

Moreover, this invention exists in the artificial reef coupling body which connected the artificial fish reef of any one of (9) and said (1) thru | or (4) mutually, and formed the channel | path continuously.

  In addition, as long as the objective of this invention is met, the structure which combined said (1) to (9) suitably is also employable.

The artificial reef of the present invention has a fish reef body having a passage through which fish pass, and a ridge for stably holding the fish reef body at the side end of the fish reef body, and fish can enter and exit the fish reef body. Since the through-hole of the size is formed, the inside of the passage becomes a place for fish (hiding place, resting place, spawning ground and feeding ground), and fish can freely enter and exit through the through-hole.
In addition, by providing the buttock, the entire artificial reef is installed on the seabed in a stable state.

In addition, since a plurality of artificial reefs can be connected to each other to form a long continuous passage, the reef can be easily expanded.
In addition, the shape and size of the through holes formed in the fish reef body can be easily changed by changing the design of a part of the mold for manufacturing, so that the one corresponding to the fishing ground can be provided.
As a result, it is possible to easily expand existing fishing grounds and create new fishing grounds.

The best mode for carrying out the present invention will be described below with reference to the drawings.
First, the utilization form of the artificial reef of the present invention is shown in FIG.
The artificial fish reef 1 of the present invention can be used alone or, as shown in FIG.
In the latter case, in order to ensure the connection between the artificial reefs 1, for example, the connection may be performed using the connector 2. In this example, a bolt hole is opened in advance in the artificial reef and the connection plate and the bolt are used. A linked example is shown.

  Moreover, when many artificial reefs 1 are connected and it is set as an artificial reef connection body, the one continuous long channel | path T can be formed.

  Concrete is generally used as the material for the artificial reef 1, and it can be constructed as a single body (or as an adjacent state) or in a connected state in order to be heavy and stable even at the seabed. .

[Artificial fish reef 1]
FIG. 2 is a perspective view showing a first embodiment of the artificial reef 1.
The artificial fish reef 1 includes a fish reef body 1a having a passage T through which fish passes, and a ridge 1b is formed at a side end of the fish reef body.
The fish reef body 1a is formed with a circular through hole H having a size allowing fish to enter and exit.
The fish reef body 1a is formed in an arch shape, and the internal passage T is similarly an arched space.
This passage T is a place where fish grow.

Since the through hole H is formed in the fish reef body 1a, the fish can freely enter and exit through the through hole H.
The eaves part 1b is formed so as to expand outward from the side end part of the arch-shaped fish reef body 1a.
The artificial fish reef 1 can land on the bottom of the sea in a stable state by having the ridge 1b.

[Artificial fish reef 2]
FIG. 3 is a perspective view showing a second embodiment of the artificial reef 1.
This artificial fish reef 1 is one in which a large number of circular through holes H are regularly formed in the entire arch-shaped fish reef body 1a.
Naturally, the through holes H can be formed at random.

[Artificial fish reef 3]
FIG. 4 is a perspective view showing a third embodiment of the artificial reef 1.
The artificial fish reef 1 is formed with three circular through holes H having different sizes on the entire arch-shaped fish reef body 1a.
Naturally, the arrangement of the circular through holes H can be changed, for example, the minimum through hole H is formed at the center.

[Artificial fish reef 4]
FIG. 5 is a perspective view showing a fourth embodiment of the artificial reef 1.
This artificial fish reef 1 is one in which three rectangular through holes H are formed in an arch-shaped fish reef body 1a.
Naturally, the number of the rectangular through holes H can be freely set.

[Artificial fish reef 5]
FIG. 6 is a perspective view showing a fifth embodiment of the artificial reef 1.
In this artificial fish reef 1, the diameter of the passage T of the arch-shaped fish reef body 1a is gradually reduced in the longitudinal direction.
By setting the diameter of the passage T in this way, water flows easily in the passage T even when it is submerged in the deep sea where there is no movement of seawater.

[Artificial fish reef 6]
FIG. 7 is a perspective view showing a sixth embodiment of the artificial reef 1.
This artificial fish reef 1 has a notch K formed in the ridge 1b of the artificial fish reef 1 in FIG.
This notch K is for escaping the unevenness of the bottom surface when the artificial fish reef 1 is submerged on the sea floor, and the movement of the artificial fish reef 1 is prevented by fitting a protrusion on the sea bottom into this part. There are advantages.

[Artificial fish reef 7]
FIG. 8 is a perspective view showing a seventh embodiment of the artificial reef 1.
The artificial fish reef 1 has an extended portion 1b1 in which a ridge portion 1b is extended from the front end of the fish reef body 1a by a certain length.
Moreover, the ridge part 1b is missing by a fixed length from the rear end of the fish reef body 1a to form a defect part 1b2.

Accordingly, when a plurality of such artificial fish reefs 1 are connected, as shown in FIG. 9, the second artificial artificial reef is located behind the deficient portion 1b2 of the heel portion 1b of the first artificial reef 1X. The extension portion 1b1 of the ridge portion 1b of the fish reef 1Y is fitted.
In this case, a part of the lower surface of the fish reef body 1a of the first artificial reef 1X is placed on the extension 1b1 of the second artificial reef 1Y.
Therefore, when it is laid on the seabed, it stabilizes when one artificial fish reef 1X is connected to act so as to hold down the other artificial fish reef 1Y.

  Hereinafter, the present invention will be described according to examples, but the present invention is not limited to the examples.

(Example)
Five artificial artificial reefs 1 made of concrete having the shape shown in FIG.
The reef body 1a has an inner diameter of 3 m, an outer diameter of 3.2 m, a thickness of 0.2 m, a length of 2 m, and a width of the eaves part 1b of 1 m.
The diameter of the through hole H was 0.5 m.
The weight of the artificial fish reef 1 was about 6 t.
Then, the two were connected to form an artificial fish reef linked body (experimental fish reef A), and the rest were submerged as a single experimental fish reef (B, C, D) at a position 20 meters below the seabed.

After the construction described above and after one year, the state of each experimental fish reef was observed.
As a result, it was confirmed that seaweeds and the like were densely breeding in the experimental reef A and the experimental reefs (B, C, D) and that many fish were gathered in the passage.
It was also observed that small fish entered and exited freely from the through hole.

According to the artificial fish reef of the present invention, the inside of the passage is a place for fish (hiding place, resting place, spawning ground and feeding place), and fish can freely enter and exit through the through holes.
In addition, by providing the buttock, the entire artificial reef can be installed on the seabed in a stable state.
In addition, since multiple artificial fish reefs can be connected to each other to form a long continuous passage, it is possible to easily expand the fish reef. Therefore, it is possible to easily expand existing fishing grounds and create new fishing grounds. .

Although the present invention has been described above, the present invention is not limited to the above-described embodiments, and it goes without saying that other various modifications are possible without departing from the essence thereof.
For example, as a fish reef, it can be used not only on the seabed but also on a lake or riverbed.

In addition to the connector shown in FIG. 1, various connectors such as a U-shaped connector 2 shown in FIG. 10 can be used.
In the case of FIG. 10, a fitting groove L for fitting the connector 2 is formed in the flange 1b.

In addition, concrete is mainly used as a material for the artificial reef, but various materials can be used as long as they are submerged in water.
Moreover, when using concrete, as shown to FIG. 11 (AA cross section of FIG. 2) depending on a use, it is good to mix fragments, such as a shell, in it.
If it does in this way, many fragments 4, such as a shell, will protrude from the inner wall surface of the fish reef main body 1a, and the spores of the seaweed 5 will adhere and it will be easy to reproduce, and it will become excellent as a feeding ground for prey fish.

FIG. 1 is an explanatory view showing a utilization form of the artificial fish reef of the present invention. FIG. 2 is an explanatory view showing a first embodiment of the artificial fish reef of the present invention. FIG. 3 is an explanatory view showing a second embodiment of the artificial fish reef of the present invention. FIG. 4 is an explanatory view showing a third embodiment of the artificial fish reef of the present invention. FIG. 5 is an explanatory view showing a fourth embodiment of the artificial fish reef of the present invention. FIG. 6 is an explanatory view showing a fifth embodiment of the artificial fish reef of the present invention. FIG. 7 is an explanatory view showing a sixth embodiment of the artificial fish reef of the present invention. FIG. 8 is an explanatory view showing a seventh embodiment of the artificial fish reef of the present invention. FIG. 9 is an explanatory diagram showing a case where the artificial fish reef of FIG. 8 is connected. FIG. 10 is an explanatory diagram illustrating another example when fish reefs are coupled using a coupling tool. FIG. 11 is an explanatory view showing a concrete artificial reef mixed with shell fragments.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Artificial fish reef 1a Fish reef body 1b Ridge part 1b1 Extension part 1b2 Defect part 2 Connection tool 3 Fish 4 Shell fragments 5 Seaweed H Through hole K Notch L Fitting groove T Passage

Claims (9)

  A fish reef body having a passage through which fishes pass, and a hook for stably holding the fish reef body are formed at the side end of the fish reef body, and a through hole of a size that allows fish to enter and exit is formed in the fish reef body. An artificial fish reef characterized by   The artificial fish reef according to claim 1, wherein the passage of the fish reef body is formed in an arch shape.   The artificial reef according to claim 1, wherein a plurality of the through holes are formed.   The artificial fish reef according to claim 1, wherein the through hole is formed with a plurality of different shapes.   The artificial fish reef according to claim 1, wherein a diameter of the passage formed in the arch shape is reduced in a longitudinal direction.   The artificial fish reef according to claim 1, wherein a notch is formed in the buttock.   2. The artificial fish reef according to claim 1, wherein the ridge is extended by a certain length from the front end of the fish reef body, and the ridge is lost by a certain length from the rear end.   The artificial fish reef according to claim 1, wherein a number of shell fragments are protruded from a wall surface of the fish reef body.   An artificial fish reef linking body comprising a plurality of artificial fish reefs according to any one of claims 1 to 4 connected to each other to continuously form a passage.

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