JPS6336723A - Block for fish bank and vegetation - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a fish reef/vegetation block that is installed at the bottom of oceans, rivers, and lakes and is used to promote the reproduction of fish and the growth of underwater plants. It is.

(Conventional technology) In order to solve the problem of depletion of fisheries resources and to create and maintain a good natural environment, the purpose is to artificially provide spawning grounds for fish and refuge areas for fry and young fish to protect themselves from external predators. Fish reef blocks with various shapes and structures have been proposed.

(Problems to be solved by the invention) However, conventional fish reef blocks only create a space for fish to nest, migrate, or retreat, and plant seeds and spores settle on the fish reef blocks, causing plants to flourish. There's nothing to do.

In fish reef blocks where aquatic plants and algae do not colonize, there are few suitable objects for fish to lay their eggs, so there is a high risk that the eggs that have been laid will be washed away, and fry and young fish will have to hide from predators. Because there are few and easy to be preyed on by foreign enemies,
The rate at which fish grow to adulthood is slow to improve.

Furthermore, even when fish spawn and hatch, aquatic plants do not colonize fish reef blocks well, and when the supply of oxygen from plants is low, a slight imbalance in the ecosystem may result in an oxygen-deficient condition. .

poses a major threat to fish survival.

Furthermore, in rivers and other areas where aquatic plants and algae do not thrive, it is difficult for various aquatic insects and microorganisms, such as firefly larvae, to grow, and it is completely impossible to restore the clear and elegant natural environment where fireflies fly wild. be.

Therefore, an object of the present invention is to provide a fish reef/vegetation block that can reliably establish and grow plants and actively create an environment suitable for spawning, hatching, and growth of fish.

(Means for Solving the Problems) As explained below using the reference numerals in the attached drawings, the fish reef/vegetation block of the present invention has a cavity for fish migration or nesting and a shelf for growing plants. It is something that you have.

(Embodiment) In the preferred embodiment of the present invention shown in FIGS.
It is surrounded by a rear wall 3, a pair of left and right side walls 4 diagonally intersecting the rear wall 3, and a front wall 5 parallel to the rear wall 3, forming a trapezoidal shape in plan view, and the cavity 2 is formed vertically. Penetrating.

The upper part of the front wall 5 of the cavity 2 is provided with a rectangular opening 6 spanning the entire width, and the side wall 4 is provided with a circular opening 7 close to the rear wall 3. These openings 6.7 serve as entrances and exits for fish, and also serve as entrances for plants 8 to enter the cavity 2.

A bottom wall 10 having a triangular shape in a plan view projects laterally from the lower end portions of the pair of left and right side walls 4, and the bottom wall 10 serves as a shelf surface for growing plants. On the upper surface of the bottom wall 10, three groove-shaped recesses 11 are arranged upwardly in parallel along the side wall 4.

The blow 2 main body 1 is installed at the river bed 12 at the installation location so that the bottom wall 10 is inclined with respect to the horizontal line, and the bottom wall 1
0, the left and right ends of the side wall 4 and the rear wall 3 form a substantially triangular recess 13. In this concave portion 13, dirt and sandff
14 is deposited, and the soil and the like thickly penetrate into the four parts 11, providing a suitable medium for plant seeds, spores, etc. to settle and take root deeply.

The upper surfaces 4a of the left and right side walls 4 and the bottom surfaces 6a of the openings 6 of the front wall 5 are also provided with upward recesses 11 in which earth and sand and gravel 14 are likely to be deposited. The bottom surface 6a also constitutes a shelf section for growing plants. As shown in FIGS. 3 and 4, the upper surfaces 4a of the left and right side walls 4 in the portions provided with the recesses 11 do not overlap with the upper blocks when the blocks are stacked one after another.

When stacking blocks as shown in FIGS. 1, 2 and 3, the upper surface protrusion 15 of the back wall 3 of the lower block
is fitted into the lower surface receiving groove 16 of the rear wall of the upper block. In order to firmly connect the upper and lower blocks together, reinforcing bars 19 are inserted through the vertical holes formed by the semicircular grooves 17 on the left and right end faces of the back wall 3 and the vertical hole 18 in the center of the back wall 3. The space around the reinforcing bars 19 is filled with cement mortar according to a conventional method.

As shown in FIG. 35, the dimension between the outer surfaces of the left and right pair of bottom walls 10, 10, which are triangular in plan view, decreases slightly toward the front side, and the dimension between the upper surface protrusion 15 and the lower surface receiver Groove 1
Since a play space is ensured between the blocks 6, the block body 1 can be installed not only in a straight line, but also with an appropriate curve.

15 to 21 show end blocks that are inserted every other step into the left and right ends of a block-stacked fish reef. It is formed into a triangular shape in plan view, and this cavity 2 also penetrates vertically.

In the blocks shown in FIGS. 22 to 31, the cavity 2 for fish nesting or migration is formed into a rectangular shape in plan view by a back wall 3, left and right side walls 4 perpendicular to the back wall, and a front wall 5,
The bottom wall 10 projects from the lower end of the side wall 4 in a rectangular shape in plan view, and provides a wider shelf surface for growing plants.

In the embodiment shown in FIGS. 32 and 33, a vegetative pine tree 20 is fixed to an upward recess 11 formed on a shelf for growing plants. This vegetation mat 20 contains or has fixed plant nutrients, plant seeds, spores, and seedlings,
It is firmly fixed to the recess 11 with an adhesive 21 to prevent it from being washed away. Note that the fixing method is not based on adhesive, but may be done by driving a lock pin or the like, and depending on the flow conditions at the installation location, it may be fixed by fitting into a car.

By using this Vegetable Pine) 20, it is possible to proactively allow the intended plants to settle and flourish on the block without relying on the chance of natural attachment of a single seed or spore, and it is possible to efficiently create a state of coexistence between fish and useful plants. .

In the embodiment shown in FIG. 33, the opening 6 in the front wall 5 for the entrance/exit for fish or the entrance for plants is formed at the lower part of the front wall 5. Further, in the embodiment shown in FIG. 34, an opening 23 is provided in the back wall 3, which opens into a mud wall 22 such as a river. Therefore, fish and aquatic creatures that have a habit of seeking burrows in muddy soil, such as eels, can enter and exit the cavity 2 through the opening 23.

In the embodiment shown in FIG. 35, the recess 11 is not provided on the upper surface of the bottom wall lO constituting the shelf section for growing plants, and the entire surface is formed flat.

The present invention can be implemented in various forms, and the shape, orientation, and arrangement of the cavity for fish migration and nesting and the shelf for growing plants are not limited to those shown in the drawings above. When fixed to the block with an adhesive or the like, the shelf surface portion for growing plants may be tilted backwards toward the front side, and the four portions 11 for vegetation may be provided facing downward or sideways.

(Effects of the Invention) As described above, the blowhole of the present invention has a shelf for growing plants in addition to a cavity for fish migration or nesting, so it is simply a space for fish to spawn, nest, migrate or retreat. Not only are the blocks created, but plant seeds and spores settle in the appropriate places on the blocks, allowing the plants to flourish.

This thick vegetation becomes a good target for fish to lay their eggs, and it also provides a cover for fry and young fish to avoid predators, so spawned eggs may be washed away, and fry or young fish may be exposed to predators. Significantly reduces the risk of predation. Furthermore,
Since oxygen is constantly supplied from the plants that have settled on the blocks, oxygen deficiency conditions do not easily occur, and the growing environment for fish is improved and maintained. Therefore, the growth rate from eggs to adults is considerably improved, which is beneficial for the reproduction and proliferation of fishery resources.

Additionally, since aquatic plants and algae take root and flourish, it is easy for various aquatic insects and microorganisms, such as firefly larvae, to grow, and it is possible to restore a good natural environment where fireflies can fly wild.

[Brief explanation of drawings]

1 to 21 show a fish reef/vegetation block according to an embodiment of the present invention, FIG. 1 is a perspective view of the block in a laid state, and FIG. 2 is a cross section taken along line M-M in FIG. 3. FIG. 3 is a front view from diagonally above of the block installed, and FIG. 4 is a plan view of the blow 7 installed. Fig. 5 is a front view of the block, Fig. 6 is a plan view of the block, Fig. 7 is a bottom view of the block, Fig. 8 is a right side view of the block, and Fig. 9 is a rear view of the block. , Figure 1O is a sectional view taken along line A-A in Figure 5, and Figure 11 is a cross-sectional view taken along line B-B in Figure 5.
Line sectional view, Figure 12 is a line C-C sectional view of Figure 5, Figure 13.
The figure is an end view of the section taken along the line DD in FIG. 5. FIG. 14 is a front view of the end block, FIG. 15 is a plan view of the block, FIG. 16 is a bottom view of the block, and FIG.
The figure is a left side view of the block, FIG. 18 is a rear view of the block, FIG. 19 is a sectional view taken along the line E-F in FIG. 14, and FIG. Figure 21 is G in Figure 14.
- It is an end view of a G line cut part. 22 to 31 show a fish reef/vegetation block according to another embodiment of the present invention, FIG. 22 is a front view of the block, FIG. 23 is a plan view of the block, and FIG. 24 is a A bottom view of the blow 2, FIG. 25 is a right side view of the block, FIG. 26 is a rear view of the block, and FIG. 27 is a view of H in FIG. 22.
-H line sectional view, Fig. 28 is I-H line sectional view of Fig. 22,
Figure 29 is a sectional view taken along line J-J in Figure 22, and Figure 30 is a cross-sectional view of the
FIG. 2 is a cross-sectional view taken along the line N--, and FIG. 31 is a cross-sectional view taken along the line L--L in FIG. 22. 32 to 34 are longitudinal sectional views of reef and vegetation blocks according to different embodiments of the present invention, respectively. Third
FIG. 5 is a plan view of a reef/vegetation block according to yet another embodiment of the present invention. l...Fish reef/vegetation block body, 2...Cavity for fish migration or nesting, 3...Back wall, 4...Side wall,
5... Front wall, 6.7... Opening, 8... Plant,
9... Fish, 10... Bottom wall constituting a shelf section for growing plants, 11... Four parts for vegetation, 12... River bed, 13
... Recessed part for vegetation, 14... Earth and sand, 15... Upper surface protrusion, 16... Lower surface receiving groove, 17... Semicircular groove, 1
8... Vertical hole, 19... Reinforcing bar, 20... Vegetation mat, 21... Adhesive, 22... Earth wall part of river etc., 2
3... Opening Fig. 24 Fig. 26 Fig. 23 Fig. 25 Procedure amendment (method) 31st October 1986

Claims (5)

[Claims] (1) A fish reef/vegetation block having a cavity for fish migration or nesting and a shelf for growing plants. (2) The fish reef/vegetation block according to claim 1, wherein the space including the shelf section for growing plants communicates with the cavity section for fish migration and nesting. (3) When installed on a riverbed or the like, the shelf surface for growing plants is inclined with respect to the horizontal line, and the shelf surface for growing plants and the adjacent block wall form a recessed part, as claimed in claim 1. The fish reef/vegetation block mentioned above. (4) The fish reef/vegetation block according to claim 1, wherein an upward concave portion is formed in the shelf surface portion for growing plants. (5) A patent for fixing a vegetation mat containing or fixing plant nutrients and plant seeds, spores, and seedlings to a shelf for growing plants or an upwardly or horizontally facing recess formed on the shelf for growing plants. A fish reef/vegetation block according to claim 1.