JP4423511B1 - Organic fishing reef - Google Patents

Abstract

【Task】
Using unutilized resources such as bamboo and woody organic matter, we will create fishing reefs using fiber-reinforced plastic ships that have been used or abandoned, and will aim to restore satoyama and revitalize satoumi.
[Solution]
A two-boat fiber reinforced plastic ship is used as a first ship having a buoyancy imparting means and a second ship that is used as a container, and is connected by traction means at a predetermined interval, and an outer frame is formed on the upper part of the second ship. , By inserting solid plant organic matter into the inner space of the outer frame to form organic reefs, the organic matter is decomposed by microorganisms and aquatic organisms, the aquatic organisms become the food for fish, and the small space of organic matter becomes the feeding ground for fry and juvenile fish It becomes a place of residence, a food chain is formed, fishery resources are restored, and vitality is restored to Satoumi.
Even in satoyama, abundant nature and income are restored through the effective use of waste bamboo and thinned wood.
[Selection] Figure 1

Description

  In the present invention, an upper ship to which a buoyancy imparting device is attached and a lower ship having a specific gravity greater than 1 are connected with a predetermined interval, an outer frame is formed within the predetermined interval, and an individual frame is formed in the inner space of the outer frame. It relates to an organic matter reef in which plant organic matter is inserted.

Conventional fishing reefs using organic matter include fishing reefs used in combination with concrete or the like (see, for example, Patent Document 1).
There is a ginger having a function of raising and lowering a specific fish species (see, for example, Patent Document 2).
For example, there is a patent document (a quadrangular pyramid reef using raw wood).
For example, there is a patent document (rubbing mixed thinning lumber fishing reef).
For example, there is a patent document (underwater vegetation method and underwater vegetation facility).
For example, there is a patent document (artificial reef using an FRP abandoned ship and a used fishnet).
For example, in Yamaguchi Prefecture, several types of thinned lumber reefs are being tested.

JP 2008-048687 A JP 2007-135429 A

In the conventional technology, even if there is a fishing reef using thinned wood or a floating body using an abandoned fiber-reinforced plastic ship, it is destroyed by the food chain relationship from organic matter to fish via aquatic organisms and the food chain There is no consideration for a method for easily regenerating organic reefs without generating waste.

Therefore, using fiber-reinforced plastic ships that are difficult to dispose of, the use of organic materials such as bamboo, planted forest thinning, roadside trees and planted trees, scraps and waste wood generated during the sawmilling process, etc. It is an issue to provide cheaper to the coastal sea area.

In order to solve the above-mentioned problems, the present invention is an organic fishing reef in which a ship using at least a part of a fiber reinforced plastic is used, and the ship is a first ship in the vertical direction and a first ship in the lower part. There are two ships, and the first ship is used as a buoyancy imparting means in a reverse posture with the ship bottom up, and a bag-like member having an air supply / exhaust port and an exhaust exclusive port is attached inside the hull, A hollow member that has an exhaust port and at least a part of the lower part is attached, or a sheet-like member that has an air supply / exhaust port and an exclusive exhaust port is attached in close contact with the lower surface of the hull except for the lower surface of the hull. The second ship is used in a forward position with the bottom of the ship as a container for organic matter, and the sum of the hull and the object filled in the hull has a bulk specific gravity greater than 1. First ship Within the range smaller than the maximum buoyancy, the hull is filled with heavy objects, and the first ship and the second ship are connected by traction means with a predetermined interval between the ships. The outer frame side surface is formed by the outer frame forming member within a predetermined interval, and a solid plant organic matter having a predetermined volume is inserted into the inner space of the outer frame, and the outer frame upper surface is the outer frame forming member. Provide a closed organic reef.

The predetermined interval provided between the first ship and the second ship varies depending on the water depth and tidal current, but is approximately one-half to three times the hull length of the first ship or the second ship, It is an interval between ships including a hull connected in the vertical direction by towing means.

The outer frame forming member is a net-like elastic member, rope member, pipe, or hose shape that has a gap through which fry and small fish can pass, preventing dispersal of a predetermined volume of plant organic matter inserted into the inner space of the outer frame. The hollow member, a rod-shaped member filled with foamed resin, and a ship are at least one of them.

The gap through which the fry and small fish can pass is the interval between the openings that constitute a part of the side surface of the outer frame, and the small fish such as fry and juveniles can freely pass through and the solid plant in the initial stage of insertion This is the size of a net-like or bowl-like space where the organic material is not dispersed, and is approximately 3 cm to 20 cm apart.

The exclusive exhaust port is an opening that can be exhausted only when the internal pressure of the bag-like member or sheet-like member to be installed becomes higher than the water pressure and water can be prevented from entering by the check valve.

The solid plant organic matter having the predetermined volume is an organic matter having a volume that is not easily separated from a gap through which the fry or small fish can pass alone or in a bundle, except for powders and granular substances. Mainly bamboo and woody organic matter.

The buoyancy imparting means formed in the first ship is a mixture of a steady buoyancy part filled with or covered with foamed resin between the ship bottom and the bottom plate and the uneven part, and a variable buoyancy member capable of supplying and exhausting pressurized air. Buoyancy member.

  The side surface of the outer frame is connected to a traction means connected to a steady buoyancy part independent of the first ship or a variable buoyancy part independent of the first ship, or connecting the first ship and the second ship.

The outer frame side surface needs to be formed with the outer frame side surface standing upright above the second ship, and the upper part of the outer frame side surface is a steady buoyancy part independent of the first ship or a variable buoyancy independent of the first ship. Provided is an organic reef that is connected to a member to be upright or connected to a traction means that connects between a first ship and a second ship.

The steady buoyancy part independent of the first ship is a buoyancy part having a constant buoyancy filled with foamed resin inside, and the variable buoyancy part independent of the first ship can supply and exhaust pressurized air. The floating buoyancy member is a hollow member, and is an independent buoyancy member separate from the first ship.

  In the second ship, a separate variable buoyancy part that is independent of the first ship is attached to the periphery of the second ship as means for facilitating ascent by injecting pressurized air during reef regeneration. Provide organic reefs.

  Said 1st ship has a mooring means with the seabed or the apparatus installed in the seabed, and a mooring means is an organic reef which can be repeatedly detached and connected, and moored alone or in groups.

  Organic matter in which the second ship is connected to a plurality of first ships, or the first ship is connected to a plurality of second ships, or a plurality of first ships and a plurality of second ships are connected. There is a fishing reef.

Since the first ship on the water surface or directly below the water surface is greatly affected by waves and swings up and down and left and right, it is advantageous to connect both the first and second ships with two to about 120 ships. Form organic reefs that are continuous in the direction.

The first ship is stabilized by mooring means with the seabed or a device installed on the seabed, but it is necessary to limit the movement of the second ship, and by connecting adjacent second ships with outer frame connecting means Limit and stabilize movement.

The organic reefs form a group of organic reefs continuous in the parallel direction, suspended from the water surface or installed on the seabed or lake bottom, used as a part of a stationary net, or united with a stationary net, Alternatively, it is used as a part of a fish collection facility, or is combined with a fish collection facility to provide an organic reef group with a high fish collection effect.

By using the present invention, providing bamboo and woody organic matter in the form of individuals to the undernourished ocean, the organic matter is gradually decomposed by microorganisms and aquatic organisms, and the aquatic organisms become food for fish and are sustained. The food chain is completed, providing a place for fry and juveniles, and at the same time making effective use of waste bamboo and thinned wood.

It is a conceptual diagram of the organic matter reef which consists of a 1st ship and a 2nd ship. It is a side view of the organic matter reef as seen from the front of the first ship and the second ship (the inside of the circle is a cross-sectional view seen through the inside of the outer frame). It is a perspective view of the 1st ship which attached the bag-shaped member to the box-type work ship. It is a perspective view of the 1st ship which attached the sheet-like member in close contact with the box-type work ship. It is sectional drawing of the 1st ship which attached the hollow member to the pleasure boat, and filled up between the ship bottom and the baseplate, and between the hull and the hollow member with the foamed resin. It is a perspective view of the organic matter reef which attached the floating buoyancy part independent from the 1st ship to the peripheral part of the 2nd ship. It is an image figure which connects several organic reefs and installs as an organic reef group. It is an example of the top view which connects several fishing reefs and installs as a large fishing reef group for the purpose of fishing. It is an example of a capture system that combines a stationary net and an organic reef group.

The above-mentioned problem is to provide an inexpensive organic reef. Therefore, in the present invention, a second-hand or abandoned fiber-reinforced plastic ship is used, unused resources are utilized, and an inexpensive organic reef is aimed at.
In addition to the estimated 140,000 abandoned boats, fiber-reinforced plastic ships, which have exceeded 10,000 ships every year, have been discontinued, but they have been dismantled with excellent product characteristics that are lightweight, high-strength and durable. At times, disasters have caused problems such as cheap and effective recycling technology, and reuse without consuming new energy.
Other than fiber reinforced plastic ships, for example, when wooden ships are used, the ships themselves are prey for microorganisms and aquatic organisms, which are not suitable because they are quickly decomposed and the reef function is not established.
Although many fish live on iron wrecked ships, iron ships are too large to be used as organic reefs of the present invention. At the same time, iron is easy to regenerate and regenerates as a valuable resource. It should be.

The embodiment will be described based on the embodiment shown in FIG.
The buoyancy imparting means (20) of the first ship (10) is a small pleasure boat (length 6m, width 1.9m, depth 1.6m) made of fiber reinforced plastic, engine, steering device, and other accessories. And the foamed resin (26) is filled between the ship bottom (12) and the bottom plate (13) and into the hollow part of the ship's hull to obtain a steady buoyancy part (21). The bag-shaped member (with the concavo-convex portion filled with foamed resin as shown in FIG. 5 and attached with the air supply / exhaust port (17) connected to the exhaust exclusive port (16) and the air supply / exhaust hose (18) with one side reaching the water surface ( 14) was made of a waterproof sheet to form a variable buoyancy member (23), which was attached at two locations on the front and rear of the hull.

The first ship (10) and the second ship (30) were connected by traction means (60) with a predetermined distance of 16 m (FIG. 2-82).
The traction means (60) is gathered at one place in a part between the first ship and the second ship, and the upper and lower parts are separated and connected to the peripheral part (11) of the first ship and the peripheral part (31) of the second ship. .
The peripheral part (11) of the first ship is the same part as the lower surface of the first ship, and the peripheral part (31) of the second ship is the same part as the upper surface of the second ship.

The second ship (30) uses a hull obtained by removing a deck and attached parts from a fiber-reinforced plastic fishing boat (length: 13 m, width: 2.5 m, depth: 1 m). The outer frame rope (46) was extended within a predetermined upper range, and the tip was connected to the outer frame rope (46) that circulates around the outer frame upper surface (43).

An outer frame net (44), which is an outer frame forming member (40), is stretched between the peripheral edge (31) of the second ship and the outer frame rope (46) on the upper surface of the outer frame, so that fry and small fish can pass through. The outer frame side surface (42) provided with a gap (FIG. 2-83) was completed.

The gap that allows fry and small fish to pass through on the side of the outer frame of this example has a rhombus with a short side of 6 cm and a long side of 12 cm, and the fry and young fish protect themselves from large fish and decompose organic matter. It is a passage for eating microorganisms and insects that play an important role in organic reefs.

Sand (FIG. 2-55) was put in the bottom (32) of the second ship so that the bulk specific gravity of the second ship (30) was heavier than 1.

  Solid plant organic matter (FIGS. 2-50) having a predetermined volume to be inserted inside the outer frame is described in Example 7.

  The upper surface of the outer frame into which the organic matter was inserted was closed with an outer frame net (44) which is an outer frame forming member (40), and the organic reef shown in FIG. 1 was completed.

  FIG. 2 is a side view of the first ship (10) and the second ship (30) as seen from the bow side, and mainly describes differences from the embodiment of FIG.

  FIG. 2 shows a case in which the upper part of the outer frame is connected to a hollow member (25) made of a vinyl chloride pipe and the side surface (42) of the outer frame is made upright by utilizing the buoyancy of the hollow member, By expanding it, the upper space inside the outer frame was expanded, and it became easy to put solid organic matter (50), and at the same time, a large amount of organic matter could be stored.

  The outer frame net (44) of the outer frame forming member (40) was formed from the bottom (32) of the second ship within a predetermined interval (82).

  The embodiment shown in FIG. 3 uses a laver picking work ship (outer dimension = width 1.4 m × length 3 m × depth 0.4 m) having the simplest rectangular shape among fiber reinforced plastic ships. A bag-like member (14) that substantially matches the inner dimension (1.3m x 2.7m x 0.38m) is made of a waterproof tent sheet, and the outer peripheral edge of the first ship (10) 11).

The bag-like member (14) was provided with an air supply / exhaust port (17) connected to an air supply / exhaust hose (18) with one side reaching the water surface, and an exhaust exclusive port (16).

Using rope as traction means (60), wrap around the outer periphery (11) of the first ship and bind, and further wrap around the bottom and bottom surface (because it is used in a reverse orientation, the top surface of the hull becomes the bottom surface) The traction means (60) was formed by crossing and tying with a rope to be connected and connecting a traction rope.

The embodiment shown in FIG. 4 uses the above-mentioned laver picking work ship (outside dimension = width 1.4 m × length 3 m × depth 0.4 m) as the first ship (10), and the air supply / exhaust port (17). And a concave sheet-like member (15) (width 1300 mm × 2700 mm × depth 380 mm) having a dedicated exhaust port (16) are attached in close contact with the peripheral edge (11) of the first ship, The traction means (60) was attached to 11).

The embodiment shown in FIG. 5 removes components such as a propulsion device and a steering device from a fiber reinforced plastic pleasure boat (length 4.2 m, width 1.5 m, depth 0.6 m), and the bottom of the first ship. The space between (12) and the bottom plate (13) of the first ship and the hull cavity was filled with foamed resin (26) to form a steady buoyancy part (21) of the first ship (10).

  A hollow member (27) having an internal volume of 1300 liters on the front side of the first ship and a hollow member (27) having an internal volume of 2000 liters on the rear side were fixed to the hull to form a variable buoyancy member (23).

The space between the hollow member (27) and the hull is filled with foamed resin (26). However, there is a capacity difference between the front and rear hollow members (27), and taking into account the capacity difference, the steady buoyancy part (21). A large amount of foam resin (26) was filled in the front part so that the sum of the buoyancy part (23) and the buoyancy part (23) had substantially the same buoyancy.
The towing means (60) was connected from four places on both sides before and after the hull, and the embodiment of FIG. 5 was completed.

  In the embodiment shown in FIG. 6, six hollow members (27) having an internal volume of 200 liters are attached above the peripheral edge (31) of the second ship and connected by a supply / exhaust hose (18) reaching the water surface (63). The floating buoyancy part (24) independent of the first ship appears.

Solid plant organic matter to be inserted into the inner space of the outer frame (41) must be replenished because it decays and disappears in one to several years by microorganisms and aquatic organisms, but is attached to the second ship (30). An organic fishing reef that can be easily floated by injecting pressurized air from the surface of the water into the floating buoyancy section (24) independent of the six first ships was completed.

  Example 7 is a solid plant organic material (FIG. 2-50) having a predetermined volume to be inserted into the inner space of the outer frame (FIG. 6-41), and the organic material is decomposed by microorganisms and aquatic organisms, and the aquatic organisms. Is a basic substance that forms a food chain as a food for fish, but the shape is not fixed over unused bamboo or wood, so the drawings are omitted.

Waste bamboo from cutting bamboo forest (Figure 2-52) is torn off branches, cut the main part into 3m to 5m, split into 2 to 4 parts, destroy the hollow structure, and collect 10 to 30 I united with a rough rope.
Tsutsumune bamboo just after felling, which has destroyed the hollow structure, has a bulk specific gravity of 1.3 and sinks in water. However, as the moisture in the fiber evaporates over time, it is used immediately after cutting.
The branches were tied only at the branches.

Thinned wood from artificial forests (Figure 2-53) and waste trees selected from roadside trees have a specific gravity of 1.3 to 1.5 immediately after cutting with moisture, so if they are used immediately, no processing is required and they are transported. It is divided into a main trunk part and a branch part that are easy to use, and the main trunk part is used only by cutting it around 1 to 3 m.

These waste materials, which are unused resources, are precious organic substances created by absorbing carbon dioxide by plants, and are currently incinerated using fossil fuels with moisture, and the present invention is possible. As long as the prototype was used.

Solid plant organic materials used in the present invention are limited to large grasses such as bamboos, wood containing leaves and bark, and bushes, and powdered and granular seeds, grasses, fallen leaves, food wastes, etc. Is not used.

The embodiment shown in FIG. 7 is a connected organic fishing reef (70) composed of a combination of a plurality of first ships and a plurality of second ships, and is connected to a plurality of ships and moored as a group. 61), and represents the basic form of the purpose directly related to catch.

The first ship of the connected organic matter reef (70) is fixed to the seabed (64) by the mooring means (61), but the second ship is in a state of being able to rotate in the lateral direction and is not stable, so the adjacent second ship Ships are connected by outer frame connecting means (62).
Alternatively, mooring means (61) may be used to moor the seabed (64).

Reference numerals (35), (36), (37), and (38) in FIG. 7, which are different from the four second ships shown in FIG. 7, pull the outer frame forming member (40) or the outer frame in the vertical direction. Four examples with different schemes are shown.

The second ship and the outer frame-1 (35) have an outer frame net (44) formed from the upper surface (33) of the second ship, and a steady buoyancy independent of the first ship on the upper side of the outer frame (42). An example was shown in which the part (22) and the variable buoyancy part (24) independent of the first ship were connected, and the supply / exhaust hose (18) was connected to the variable buoyancy part.

The second ship and the outer frame-2 (36) have an outer frame net (44) formed from the bottom (32) of the second ship, and a steady buoyancy independent of the first ship on the upper side of the outer frame (42). An example was shown in which the variable buoyancy part (24) independent of the part (22) and the first ship was connected, and the supply / exhaust hose (18) was connected.

The second ship and the outer frame-3 (37) are formed with a fence-like net (45) from the bottom (32) of the second ship, and a steady buoyancy part independent of the first ship on the upper side of the outer frame (42). An example of connecting (22) is shown.

The second ship and the outer frame-4 (38) are formed with a fence-like net (45) from the upper surface (33) of the second ship, and connect the upper part of the outer frame side surface (42) to the traction means (60). The method of pulling up the outer frame vertically is shown.

The organic reefs need to be kept safe by submerging deeply in stormy weather such as a typhoon, and the mooring means (61) can be repeatedly detached and connected.

  FIG. 8 is a plan view of a group of reefs in which a group of reefs combined with organic organic reefs (70) extends radially outward from the central part and guides the fish that have moved along the tide (65) to the central part. In the figure, it is an example of an installation method for connecting organic reefs to tie fishing.

FIG. 9 is a plan view of the organic fishing reef (70) connected to the stationary net (71), in which the fishway guided to the stationary net is replaced with the organic fishing reef.
Large fish to be caught is an example of an installation method in which an aquatic organism or a small fish as a bait is swarmed on an organic fishing reef and guided to a stationary net along the connected organic fishing reef.

As described above, the present invention proposes a method for reusing Satoyama and Satoumi using waste, minimizing the input of new energy.
Forests grow the sea, this important issue has been recognized again, and fishermen who are planting trees have started to appear, but planted forests grow into splendid coniferous forests by planting three times as many young trees and repeating thinning. Abandoned due to the depopulation and aging of the mountain village, the overgrown plantation has squeezed its last power according to the instincts of the organism and scattered pollen several times.
Thinning and growing into rich forests also contributes to reducing medical expenses for hay fever countermeasures.

Waste trees selected from roadside trees and planted trees are incinerated by wasting fossil fuels while containing moisture, and their effective use is desired.

There are also areas where forests are being destroyed by the advance of bamboo.
The old bamboo forest damage was to extend to the adjacent land by extending the rhizome, but the current bamboo forest damage is a few trees that suddenly appeared on the border areas such as roads grew in a month or two Covering the sky, stretching the underground stems vertically and horizontally, squeezing the roots of the trees, instantly destroying the forests and turning them into bamboo forests, transforming into a ruined bamboo forest that even wild animals cannot enter.
The laurel forest is deeply rooted in the ground, stores rainwater as a green dam, and forms a rich forest that nurtures diverse organisms. Forming a biological layer, the withered bamboo gaps deeply into the ground, causing large-scale landslides.
Cutting oligotrophic bamboo that has entered the forest is a simpler and more effective method than planting and growing the forest, and the restoration of a rich forest is eagerly desired.
These phenomena are prominent in the southern region of Honshu, including Kyushu and Shikoku, and are still happening near Satoyama, but are expanding and progressing to the depths of the mountains several years away. In the near future, forests throughout Japan are fully predicted to be unrenewable, and immediate measures are imminent.

On the other hand, in the sea, Japan's coastal waters, where many seaweeds such as kombu, wakame, kajime, and hondawala were once prosperous, were supported by the rich forests behind them.
Forests are lost, earth and sand flows in through development, shallow waters and tidal flats filled with purification functions are lost due to vertical revetment, the supply of organic matter is divided by the dam lake, and the limestone layer is expanded by coral spiders on the sea floor, and the burning of the toast is widespread However, seaweed disappeared and the school of fish disappeared, and Satoumi was devastated.
The decrease in seaweed and coral reefs naturally depletes fish that lay eggs only on seaweed and fish grown by seaweed, and it is necessary to restore a broken food chain.

The limited sea area near large cities is supplied with a large amount of nutrients such as nitrogen and phosphorus dissolved in water, causing microorganisms to explode and causing adverse effects such as red tide, but on the other hand, many coastal sea areas However, there is a shortage of organic and mineral supplies.
Rivers that carry precious organic resources grown in forests to the ocean, many dams lay down, water is stagnated, organic matter is dammed up, and airlessly decomposed at the bottom of hypoxic lakes, and satoumi is exposed to poor nutrition. ing.
Satoumi lives only when it is connected to abundant forests. Instead of rivers cut off by dam lakes, the present invention completes the food chain by providing solid organic matter to the ocean.

However, even if the permanent recovery of fishery resources in Satoumi is a major economic effect, it is not effective for high-priced fishing reefs because there is no economic effect on costs.
The present invention focuses on supplying a large amount of solid organic matter, which is the origin of a sustainable food chain, and enables inexpensive fishing reefs by using used or abandoned fiber reinforced plastic ships, Permanent fishery resources are secured by large-scale reef groups connected with organic fishing reefs, or combined with existing stationary net fishing, revitalization of satoumi and livelihood even without entering the open ocean will lead to the activation of fishing villages .
In Satoyama, the utilization of unused resources such as waste bamboo and woody organic materials will bring back new employment and vitality, and can be expected to have a great economic effect connecting fishing villages and mountain villages.

DESCRIPTION OF SYMBOLS 1 Organic matter reef 10 First ship 11 Peripheral part of 1st ship 12 Bottom of 1st ship 13 Bottom plate of 1st ship 14 Bag-like member 15 Sheet-like member 16 Exhaust port 17 Supply / exhaust port 18 Supply / exhaust hose 20 Buoyancy imparting means 21 Steady buoyancy part 22 Steady buoyancy part 23 independent of the first ship Floating buoyancy member 24 Fluctuation buoyancy part 25 independent of the first ship 25 Hollow member 26 Foamed resin 27 Hollow member 30 Second ship 31 Peripheral part 32 of the second ship Two ship bottoms 33 Second ship upper surface 35 Second ship and outer frame-1
36 Second Ship and Outer Frame-2
37 Second Ship and Outer Frame-3
38 Second Ship and Outer Frame-4
40 outer frame forming member 41 outer frame 42 outer frame side surface 43 outer frame upper surface 44 outer frame net 45 fence-shaped net 46 outer frame rope 47 perspective view inside the outer frame (in circle)
50 Solid plant organic matter 52 Waste bamboo organic matter 53 Woody organic matter 55 Sand 60 Traction means 61 Mooring means 62 Outer frame connection means 63 Water surface 64 Sea bottom 65 Tidal current 70 Connected organic reefs 71 Stationary net 82 Predetermined interval 83 Fry and small fish Allowable air gap

Claims (5)

An organic fishing reef where a ship using at least a part of fiber reinforced plastic is used,
The ship has a first ship at the top in the vertical direction and a second ship at the bottom,
The first ship is used as a buoyancy imparting means in a reverse posture with the ship bottom up, and a bag-like member having an air supply / exhaust port and an exhaust exclusive port is attached inside the hull, or has at least an air supply / exhaust port. As a buoyancy imparting means, a hollow member whose lower part is released is attached, or a sheet-like member having an air supply / exhaust port and an exclusive exhaust port is attached in close contact with the lower surface of the hull except the lower surface of the hull. Formed,
The second ship is used in a forward position with the ship bottom down as a container for organic matter, and the sum of the hull and the object filled in the hull has a bulk specific gravity greater than 1 and less than the maximum buoyancy of the first ship. Inside, the hull is filled with heavy objects,
The first ship and the second ship are connected by traction means with a predetermined interval between the ships,
The outer frame side surface is formed with the outer frame forming member within a predetermined interval in the vertical direction of the second ship,
Solid plant organic matter having a predetermined volume is inserted into the inner space of the outer frame,
An organic fishing reef with the upper surface of the outer frame closed with an outer frame forming member. The second ship is
The organic matter reef according to claim 1, wherein a separate variable buoyancy part independent of the first ship is attached to the peripheral part. The first ship has mooring means with the seabed or a device installed on the seabed,
The organic reef according to claim 1, wherein the mooring means can repeat disconnection and connection. The second ship is connected to a plurality of first ships;
Or the 1st ship was connected with the some 2nd ship, or the some 1st ship and the some 2nd ship were connected. The organic matter reef of Claim 1. The organic matter reef according to any one of claims 1 to 4 ,
Hung from the surface of the water, or installed on the bottom of the sea or lake,
Used as part of a stationary network or combined with a stationary network,
Or an organic reef aggregate that is used as a part of a fish collection facility or is combined with a fish collection facility.

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