JPH0626501B2 - Structure for constructing fishing grounds - Google Patents

Description

[Field of Industrial Application] The present invention relates to a structure for constructing a fishing ground in which, in addition to the conventional purpose of fish reef, a combination of materials and nutrients that are preferred for seaweed and fish reef is combined.

[Prior Art] Conventional fish reef blocks are all made of concrete and are generally intended to replace rocks in shallow water to collect fish.

[Problems to be Solved by the Invention] The conventional techniques described above have the following problems.

A) Concrete is poor in adhesion and growth of seaweed spores due to alkali leaching, color, and rough soil in the initial stage of installation, and also has a low flow attenuation capacity, causing fish habitation and seagrass spores to adhere. It's hard.

B) Therefore, it is not always suitable for spawning, fry, and fry.

C) Conventional fish reefs are found in oligotrophic areas such as the coast of the Sea of Japan.
It hardly contributes to the prevention of rock burn phenomenon. The present application has been made in view of such problems of the conventional technology, and an object of the present application is to provide the following.

1) A new structure (fish reef) that combines conditions such as concrete, wood, iron oxide, and other stones and steels containing elements and compounds that are preferred for seaweeds and fish, and conditions that enhance the gathering effect of seaweeds and fish and shellfish.

2) The base part is made of concrete and is fixed and stable with a certain weight.

3) Place an aquaculture cage (made of wire mesh or bamboo, synthetic fibers such as plastic and vinyl) with a filling stone material on top.

4) The base (concrete) that is suitable for the geology of the seabed (sand, rock, mudstone) should be characterized, and further consideration should be given to the distribution of seawater inside the filling stone.

5) The entire structure of the present application contains a combination of materials favored by seaweeds and fish and contains nutrition. It can be said to be an epoch-making structure that is also a countermeasure against rock burn due to the combination and type of it being robust against wave forces.

[Means for Solving the Problems] In order to achieve the above object, the present invention is as follows. A proper number of circular holes 2C opened in the vertical direction are formed in the substrate portion 2A of the concrete base 2 in which the leg portions 2B hang downward at the four corners of the lower surface of the planar rectangular substrate portion 2A. The fence part 3 planted on the outer peripheral part of the upper surface of 2A is
The pillars 3A are made up of steel pipes that are erected at the four corners of the upper surface of the base plate 2A, and an appropriate number of wooden posts 3B that are erected at predetermined intervals between the corners 3A. The inside filling stone material 4 is filled, the inside filling stone 5A is filled inside the upper surface of the filling stone material 4, and the U-shaped trough made of porous concrete is provided inside the filling stone material. Are arranged in an inverted U shape, and an appropriate number of circular holes are opened at the bottom and side surfaces of this U-shaped trough. Furthermore, the above wooden poles are made of larch logs with a skin. It is a structure.

[Operation] The effect will be described.

Embodiments of the Invention Embodiments will be described with reference to the drawings. Reference numeral 1 is a structure for constructing a fishing ground of the present invention. Reference numeral 2 is a concrete base, and leg portions 2B are hung downward at four corners of the lower surface of the planar rectangular substrate portion 2A. These legs are designed to stabilize and immobilize the seabed geology such as sand, rock, and mud rocks on the sea floor. 2C is the substrate portion 2A
In addition, with a proper number of circular holes opened in the vertical direction, the circular holes aim to stabilize the waves and distribute fresh seawater inside. Reference numeral 3 denotes a fence portion which is planted on the outer peripheral portion of the upper surface of the substrate portion 2A, and a corner post 3A made of a steel pipe that is erected at the four corners of the upper surface of the substrate portion 2A, and an appropriate one that is erected at predetermined intervals between these corner posts 3A. It is composed of several wooden poles 3B and a steel bar or round steel rod 3C for fixing the corner pillars 3A and the wooden poles 3B by winding and fixing them. The use of the corner post 3A made of the above steel pipe and the band-shaped steel bar or the round steel bar 3C is to protect the inner filling stone material 4 which will be described later, the protection of the structure due to the wave force of the ocean current and the iron to fish and shellfish. It is preferred to concrete and has a high collection effect. For the corner post 3A made of the above steel pipe, peeled wood may be used depending on the special characteristics of the fish family. As for the wooden pole 3B, a log of thinned wood of larch with skin is used. The reason is that the spores of seaweed tend to adhere and the roots of seaweed tend to attach. Peeled wood may be used due to the special characteristics of the fish family. Reference numeral 4 denotes a filling stone material filled in the fence portion 3, which is a rock that contains iron oxide and cannot be used for concrete or roads. This stone is also a nutrient for seaweed and fish and shellfish. Reference numeral 5 denotes an aquaculture cage made of iron wire or the like, which is filled with a filling stone 5A. Reference numeral 6 denotes a U-shaped trough made of porous concrete, which has an inverted U shape inside the fence portion 3 and the top surface portion of the substrate portion 2A concerned and the inside of the filled filling stone material 4.
It is arranged in a letter shape. 6A is an appropriate number of circular holes formed on the bottom and side surfaces of the U-shaped trough. As a result, fresh ocean currents will be introduced inside, which will contribute to the spawning and hatching of fish and shellfish and the deposition of fry. The aquaculture cage 5 may be made of iron wire, bamboo, or plastic. 5B is an inspection opening. Although there are various dimensions, the following were preferable. The length of one side in the plane of the concrete base is about 2,350 mm, the height is about 600 mm, the height of the fence is about 1,700 mm, the aquaculture basket is 400 mm x 400 mm x 600 mm, and the bottom of the U-shaped trough is 600 mm x 240 mm. , The side is 600mm ×
290 mm [Advantages of the Invention] Since the present invention is configured as described above, it has the effects described below.

A) Since the thinned wood of larch and middle stones used for wooden poles are all unused resources, the local economic effect is high and the cost of the structure is low. The filling stone itself is a nutrient source along with iron oxide and other elements, and is a nutrient rich in plankton. Wooden poles combined with steel pillars (iron oxide) that serve as fences around the trees also serve as a nutrition source because they are liked by fish families, and they also make seagrass grow and create an environment where fish families can easily lay eggs.

B) Due to the fact that the entire structure has a shape and structure that is preferred by fish and that the members are arranged with appropriate consideration,
Deposition of young children and collecting effect of many fish and shellfish are the best.

C) In the case where the aquaculture cage is provided, the deposition effect of fry is enhanced and the growth of fry and fry is promoted.

D) Since a porous concrete U-shaped trough is appropriately arranged in the filling stone, it is possible to create a gathering effect of fry, fry and the like and an environment in which fry is easily deposited in the gap.

E) Conventional aquaculture businesses tend to become eutrophication, and problems such as the change in the taste of fish due to artificial bait are significant. Another is the lack of organic matter due to the lack of green in the coastal area, coastal erosion, terminal treatment of domestic water, etc. due to the mixing of inorganic chemicals into seawater, and the coast suitable for the marine environment is gradually narrowing. It is said to be nutritional. Therefore, this point is greatly improved.

F) Good adhesion of spores such as seaweed and kelp around the structure of the present application.

G) The internal gap is effective for spawning and hatching small fish.

H) It is effective in improving the poor Song Sea area (iso-yake), fostering plankton, and multiplying sea urchin and abalone.

I) Large collection of fish and shellfish in shallow water.

J) Excellent in wave-dissipating property.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view showing the relationship between a concrete base and a fence of the present invention, FIG. 2 is a sectional view taken along the line AA, FIG. 3 is a plan view, and FIG. FIG. 5 is a perspective view of an aquaculture cage, and FIG. 6 is a perspective view of a U-shaped trough. 1 ... Structure for constructing a fishing ground, 2 ... Concrete base, 3 ... Fence part, 4 ... Medium stone material, 5 ... Aquaculture cage, 6 ... U-shaped trough.

Claims (1)

[Claims] The legs 2B are directed downward at the four corners of the lower surface of the planar rectangular substrate 2A.
A proper number of circular holes 2C opened in the vertical direction are formed in the substrate portion 2A of the concrete base 2 on which the fence 3 is suspended, and the fence portion 3 is planted on the outer peripheral portion of the upper surface of the substrate portion 2A.
Is composed of a corner post 3A made of a steel pipe that is erected at the four corners of the upper surface of the substrate 2A, and an appropriate number of wooden posts 3B that are erected at a predetermined interval between the corner posts 3A. Is filled with the inner filling stone material 4 and the inside of the inner filling stone material 5A is filled in the upper surface of the inner filling stone material 4 and the inside of the inner filling stone material is made of porous concrete (perforated). The troughs are arranged in an inverted U shape, and a suitable number of circular holes are opened at the bottom and side surfaces of the U troughs. Furthermore, the wooden poles are made of larch logs with leather. A structure for constructing a fishing ground.