JP2772229B2 - Artificial reef - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to artificial reefs installed in seas, lakes and the like.

[0002]

2. Description of the Related Art Conventionally, this type of artificial reef has been disclosed in, for example, Japanese Patent No.
It is known that each ridgeline is formed of a hollow substantially cubic body formed of a columnar body in concrete.

[0003]

Generally, in artificial reefs,
First, phytoplankton attaches, zooplankton gathers using the phytoplankton as a diet, fry gathers using the zooplankton as a diet, and small fish gather using the fry as a diet. It causes a food chain phenomenon where shaped fish gather.

[0004] However, in the approximately cubic artificial reef in which each ridgeline is a columnar body, the interval between the columnar parts is wide, large fish enter the inside, and large fish feed on fry and small fish. However, there is a problem that the spawning rate and the proliferation rate of fish cannot be improved significantly.

The present invention has been made in view of the above-mentioned problems, and is an artificial reef that can ensure the symbiosis of plankton and fish of plants and animals, and can improve the spawning rate and the growth rate of fish due to the food chain phenomenon. The purpose is to provide.

[0006]

The artificial reef of the present invention comprises a frame and a string which is arranged in parallel with the frame and has a number of loop-like fibers protruding from a core material. The body is densely arranged at the center and sparsely arranged at the outside.

[0007]

In the artificial reef of the present invention, the phytoplankton is first attached to the string by installing the frame in the sea or in the lake, and zooplankton that feeds on the phytoplankton gathers. Fry that feed on this zooplankton gather, and small fish that feed on this fry gather and gather on this small fish as feed.

[0008] Since fish do not like to enter the portion where the fish comes in contact with the fish, fry can grow in the center of the string where the interval is small, and large fish gather and proliferate toward the outer periphery. The rate of spawning and the spawning rate can surely increase.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of an embodiment of the artificial reef of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of an artificial reef, in which a string 2 vertically stretched in a substantially square frame 1 is arranged in parallel in the vertical and horizontal directions. Then, as shown in FIG. 2, the cord-like body 2 is arranged densely at the center and sparsely at the outer periphery. For example,
At the center, the distance a between the adjacent string-like bodies 2 is set to 2.
The distance b is 5 cm on the outside, and the interval b is 5 cm on the outside, and the interval c is 10 cm on the outside.

As shown in FIG. 3, a number of loop-like fibers 4 project from a synthetic fiber-like core material 3, and the elongated cylindrical bodies 5 Are connected to each other, and the pipe shaft 6 inserted through the elongated cylindrical body 5 is fixed to the frame body 1 and a number of cord-like bodies 2 are stretched in parallel in the vertical direction.
Then, the frame body 1 in which a large number of cord-like bodies 2 are stretched in the vertical and horizontal directions is fixed underwater by a pile 8 or the like as shown in FIG.

Next, the operation of the above embodiment will be described.

As shown in FIG. 4, a frame 1 in which the cords 2 are densely arranged at the center and the outside is sparsely arranged is installed at an appropriate place such as a range where underwater sunlight can reach. As shown, phytoplankton 10 adheres to string 2. The zooplankton 11 adheres to the string 2 to which the phytoplankton 10 adheres, and the fry 13 gathers on the string 2 to which the zooplankton 11 adheres. Small fish 14 gather in body 2. further,
Large fish gather on the string 2 to which the small fish 14 is approaching. And fish hate the foreign body from touching the fish body, and since the string-shaped body 2 is arranged densely at the center and sparsely on the outer periphery, large fish cannot enter the center and zooplankton is planted. The food chain phenomenon in which plankton is fed, fry feeds on zooplankton, small fish feed on fry, and large fish feed on small fish is maintained, and the spawning rate and reproduction rate of fish are improved. I do.

[0014] By installing this reef in warm wastewater such as a nuclear power plant or a garbage incineration plant, the reef effect can be enhanced.

[0015]

According to the present invention, the phytoplankton, zooplankton, fry, small fish symbiosis and the plankton adhesion rate are arranged in the frame with the center part densely arranged and the outer part sparse. And the spawning and breeding rates of fish can be improved, and the string is placed on the frame, so it can be easily installed at any point in the water and easily directly on the mud at the bottom of the sea or the bottom of the lake Can be installed in conventional artificial reefs without the need for large amounts of concrete components,
It can be easily moved according to wave conditions or the like, and the installation depth can be easily changed. Installation costs can also be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the artificial reef of the present invention.

FIG. 2 is an explanatory plan view showing an arrangement of the cord-like body.

FIG. 3 is a side view of the cord-like body.

FIG. 4 is an explanatory diagram of an installation state of the embodiment.

FIG. 5 is an explanatory diagram of the food chain phenomenon.

[Explanation of symbols]

 1 Frame 2 String

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-4-53433 (JP, A) JP-A-57-165675 (JP, A) JP-A-56-164729 (JP, A) 45356 (JP, Y1) (58) Fields investigated (Int. Cl. ⁶ , DB name) A01K 61/00 311 A01G 33/00

Claims (1)

(57) [Claims] 1. A frame comprising: a frame; and a string which is arranged in parallel with the frame and has a large number of loop-like fibers projected from a core material. Artificial reefs characterized by sparsely arranged parts.