JPH05304854A - Structure for forming fishing ground - Google Patents

Abstract

PURPOSE:To provide the structure used for forming a fishing ground and having effects permitting to lower its cost and use the packed stone material for the nutrition of planktons, because thinned larch lumbers used as tree supports and the packed stone material are unutilized resources. CONSTITUTION:The structure for the forming the fishing ground is characterized by disposing circular holes 2C in the base plate 2A of a concrete base 2 in the vertical direction, producing shelves 3 implanted on the upper surface outer periphery of the base plate 2A from a corner pillars 3A comprising steel pipes vertically disposed on the upper surface four corners of the base plate 2A and from tree pillars 3A comprising bark-having larch logs vertically disposed between the corner pillars 3A, packing the packing stone material 4 in the shelves 3, and disposing reverse U-shaped troughs packed with the medium stone material 5A on the upper surface of the packed stone material 4.

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 are combined.

[Prior Art] Conventional fish reef blocks are all made of concrete and generally aim to replace rocks in shallow water and 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 spores of seaweed due to alkali leaching, color and rough soil in the initial stage of installation, and also has a low ability to attenuate flow and spores of fish and seagrass 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 technique, and an object of the present application is to provide the following things.

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 is made of concrete and is stable and fixed with a constant weight.

3) Place the aquaculture cage (made of wire mesh or bamboo, synthetic fibers such as plastic and vinyl) containing the filling stone 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 that it is 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 base plate portion 2A of the concrete base 2 in which the leg portions 2B are hung downward at the four corners of the lower surface of the flat plate base plate portion 2A. The fence part 3 planted on the outer periphery 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 pillars 3B 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 in the bottom and side surfaces of this U-shaped trough. Furthermore, the above wooden poles are made of larch logs with skins. It is a structure of.

[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 were designed to stabilize and immobilize the seabed geology such as sandy, rocky, and mudstone fields. 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 pillar 3A made of a steel pipe which is erected at the four corners of the upper surface of the substrate portion 2A, and an appropriate one which is erected at a predetermined interval between these corner pillars 3A. It is composed of several wooden poles 3B, and a steel bar or round steel bar 3C for fixing the corner poles 3A and the wooden poles 3B by winding and fixing them. The corner post 3A made of the above steel pipe and the band-shaped steel bar or the round steel bar 3C are used for the protection of the inner filling stone material 4 which will be described later, the protection of the structure by the wave force of the ocean current, and the iron for fish and shellfish. It is preferred to concrete and has a high collection effect. As for the corner post 3A made of the steel pipe, a peeled wood may be used depending on the special characteristics of the fish family. As for the above-mentioned wooden pole 3B, a log of thinned larch wood with a 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 depending on the special characteristics of the fish. 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 is a farming cage made of iron wire or the like, and is filled with a filling stone 5A inside. Reference numeral 6 denotes a U-shaped trough made of porous concrete, which has an inverted U shape in the upper surface of the substrate portion 2A in the fence portion 3 and inside the filled filling stone material 4.
It is arranged in a letter shape. 6A is an appropriate number of circular holes provided 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. In addition to the iron wire, the aquaculture cage 5 may be made of 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 600 mm ×
290 mm [Effect of the Invention] The present invention, which is configured as described above, has the following effects.

A) Since the thinned wood of larch and the filling stones used for wood pillars 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 pillars combined with steel pillar (iron oxide) corner pillars that form the surrounding fences are also favored by the fish family and serve as a nutrition source, as well as flourishing seaweeds, creating an environment where fish families can easily lay eggs.

B) The entire structure has a shape and structure that fishes prefer, and 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, such as the lack of greenery in coastal areas, coastal erosion, terminal treatment of domestic water, etc. due to the mixing of inorganic chemicals with seawater, and the coast suitable for fisheries environments is gradually narrowing. It is said to be nutritious. 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 for improving the poor Song Sea area (shore moss), 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 drawings]

FIG. 1 is a front view showing the relationship between the concrete base and the fence of the present invention, FIG. 2 is a sectional view taken along the line AA, FIG. 3 is a plan view, and FIG. A front view, FIG. 5 is a perspective view of a farm 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 leg portion 2B is directed downward at the four corners of the lower surface of the planar rectangular substrate portion 2A.
A proper number of circular holes 2C opened vertically are formed in the base plate portion 2A of the concrete base 2 on which the fence is suspended, and the fence portion 3 is planted on the outer peripheral portion of the upper surface of the base plate portion 2A.
Is composed of corner posts 3A made of steel pipes standing upright at the four corners of the upper surface of the base plate 2A, and an appropriate number of wooden posts 3B standing upright at predetermined intervals between the corner posts 3A. Is filled with the filling stone material 4 and the inside of the filling stone material 4 is filled with the filling stone 5A inside and the inside of the filling stone material is made of porous concrete (U). The U-shaped trough is arranged in an inverted U shape, and an appropriate number of circular holes are formed in the bottom and side surfaces of the U-shaped trough, and the wooden pole is made of larch logs with leather. A structure for constructing a fishing ground.