JP5174560B2 - Coral artificial growth device and coral artificial growth method - Google Patents

Description

  The present invention relates to a coral artificial breeding device that can be installed in a gravel deposit bottom region or a gravel bottom region of a coral reef and a coral artificial breeding method using the coral artificial breeding device.

Artificial breeding of reef-building corals has been carried out in the past, but in the case of sexual reproduction, an artificial base on which larvae that have developed after spawning and fertilization have been implanted is fixed in an appropriate breeding area. Therefore, in the case of asexual reproduction, a small piece of a live coral colony is made, and the coral piece is also fixed to an appropriate breeding target sea area.
By the way, although the reef pond is recommended as a breeding target sea area from the consideration of the environment, Patent Document 1 teaches that a hole is drilled in the rock and fixed by inserting an artificial base rod there. Yes.

  Thus, most of the reefs have gravel sediment bottom areas where the coral corals that lived have been deposited directly after death or sand gravel bottom areas accumulated after crushing, and the fixing method for the bedrock as described above is applied as it is. I can't do it. On the other hand, once it can be fixed stably, seaweeds are attached to the branch corals and their fragments, and therefore, there is an advantage that they are not easily moved by waves and are less affected by gravel movement.

JP 2003-61506 A

In order to solve the above-described problems, the present invention is a coral having a fixing function that can easily fix an artificial base or a coral fragment even in a gravel accumulation bottom region or a gravel bottom region, and can stably maintain a fixed state. An object is to provide an artificial proliferation device.
Another object of the present invention is to provide a coral artificial growth method using the above-described artificial growth device.

  As a result of diligent research, the present inventor has devised the shape of the insertion portion so that it can be easily inserted into the gravel accumulation bottom area and the gravel bottom area, and once inserted, it is stably fixed and rolled in the waves. We have succeeded in developing a coral prosthesis that has almost no risk of being damaged or buried.

The invention of claim 1 is a coral prosthesis comprising a coral breeding part and an insertion part, wherein the insertion part is a rod-shaped inner-to-plate main body and at least a pair of opposite or mutual life provided on the outer periphery of the main body. The coral prosthesis is provided with a wing-like return protrusion, and the outer surface of the return protrusion is a smooth curved surface bulging downward .
According to a second aspect of the present invention, in the coral prosthesis described in the first aspect, the lower contour line of the outer surface of the return projection appearing in a side view has a radius of ½ of the interval between the upper and lower adjacent return projections. The coral prosthesis is characterized by being approximated by an arc trajectory .
According to a third aspect of the present invention, in the coral prosthesis comprising a coral growing part and an insertion part, the insertion part is a rod-shaped inner-to-plate main body, and at least a pair of or each other provided on the outer periphery of the main body. A coral prosthetic device comprising a wing-like turning projection, wherein the inside surface of the turning projection has a mountain shape with a ridge line at the center .
The invention of claim 4 is the coral prosthesis according to claim 3 ,
The coral prosthesis is characterized in that the outer surface of the return projection is a smooth curved surface bulging downward .

  The invention of claim 5 uses the coral prosthesis according to any one of claims 1 to 4, and after the coral larvae are implanted in the coral breeding part or attached to the coral pieces, It is a coral artificial breeding method characterized by inserting an insertion part into the area and the gravel bottom area.

  By using the coral prosthetic device of the present invention, it can be easily inserted into the gravel bottom area and the gravel bottom area, and once it is inserted, it is stably fixed, and may be damaged or buried by rolling in the waves. There is almost no.

Hereinafter, a coral prosthesis 1 according to a first embodiment of the present invention will be described with reference to the drawings.
The assumed installation location of the coral artificial breeding device 1 is a gravel accumulation bottom region or a gravel bottom region, where a dead branch coral (a dead body: about 10 to 20 mm in diameter and 200 to 300 mm in length (long)) Deposition layer L is formed by random deposition as it is, or random deposition after crushing. The thickness of the deposited layer L is about 30 to 50 cm. There is an irregular gap between the deposited layers L, and the width of the gap exposed on the surface is about 5 to 10 cm.

First, the configuration of the coral artificial growth device 1 will be described.
As shown in FIG. 1, the coral artificial prosthesis 1 includes a coral growing part 3 and an insertion part 11.
The material of the coral cultivation part 3 and the insertion part 11 is preferably an unglazed natural set material that does not affect the installation environment. This is because it can be mass-produced at low cost, and in particular, the insertion portion 11 can be molded integrally while maintaining an appropriate strength while having a complicated shape. For example, a candidate is a material made of clay and molded by a pressure casting method using a gypsum mold and then oxidized and fired at a high temperature of about 1250 ° C.

The coral growing part 3 has a disk shape, and a circular recess 5 is formed at the center. In addition, grooves 7, 7,... That extend radially in the radial direction and reach the outer periphery are formed on the upper surface and the lower surface, and grooves 9, 9,. ing. This coral cultivation part 3 fixes the living coral piece S and the larvae, is inserted in said recessed part 5, and is hardened with a suitable adhesive agent (illustration omitted).
The diameter of the disk of the coral growing part 3 is set to about 20 to 30 mm, the thickness is set to about 15 to 25 mm, the inner diameter of the recess 5 is set to about 10 to 20 mm, and the depth is set to about 10 to 20 mm.

The main body 13 of the insertion portion 11 has a plate shape having a long longitudinal dimension with respect to the width dimension, and its corners are rounded. Further, the plate surface of the main body 13 is inclined downward toward both ends in the width direction with the longitudinal center line (parting line) as the ridge line 15 of the mountain. The front end portion 17 of the main body 13 has a pointed triangular shape in which both side edges are inclined so that the width dimension of the plate surface gradually decreases toward the front end.
The thickness of the main body 13 is set to about 20 to 50 mm, and the length is set to about 50 to 500 mm.
A hexagonal attachment portion 19 is provided at the base end of the main body 13, and as shown by an arrow in FIG. 2, the central portion of the circular surface of the coral growing portion 3 is attached to the attachment portion 19 with an appropriate adhesive ( (Not shown in the figure).

Reference numerals 21, 21,... Denote wing-like return projections. The pair of return projections 21 and 21 are provided so as to face each other through the plate surface of the main body 13 and are so-called opposite. In the insertion portion 11, a pair of return projections 21, 21 are provided so as to protrude at a constant interval.
Each return projection 21 has a width portion of the plate surface of the main body 13 as a base end portion, and extends obliquely upward therefrom, and each edge is rounded.

  As shown in FIG. 1, the outer surface 23 of each return protrusion 21 is a smooth curved surface that bulges downward. As shown in the side view of FIG. 3, not only in the longitudinal direction but also in the width direction is curved, and the outer contour line 27 of the edge part from the outer contour line 25 of the central part (also a line on the parting line) Is receding inward.

The distance (D) between the upper and lower return protrusions 21 defined in the cross-sectional view of FIG. 4 is set to 10 to 20 mm or more, which is equal to or greater than the diameter of the branch coral and its crushed coral fragments.
Further, the outer contour line 25 of the center portion of the outer surface 23 of the return projection 21 is set to approximate an arc locus (dotted line) having a radius of 1 / 2D.

The inner surface 29 of each return protrusion 21 has a ridge line 31 (also a line on the parting line) at the center, and both sides of the ridge line 31 are substantially flat.
The ridge line 15 of the plate surface of the main body 13 and the ridge line 31 of the inner side surface 29 are on the same plane.
Therefore, the angle (θ) of the V-shaped opening 33 in the side view is the largest on both sides, and is smaller toward the inside. The angle (θ) of the opening 33 is set so as to be within a range of 30 to 90 °, preferably 30 to 45 ° throughout.
Moreover, as shown in FIG. 5, the upper side outline 35 of each return protrusion 21 is a curved line bulging upward.

Next, the installation method of the coral artificial proliferation tool 1 is demonstrated.
A diver dives and inserts the coral artificial prosthesis 1 into the gap by hand while avoiding resistance as shown in FIG. In that case, it inserts so that the outer peripheral surface of the coral cultivation part 3 may be buried in the deposition layer L. In FIG. 6, for the convenience of visual recognition, drawing of coral pieces fixed to the coral growing part 3 and algae entangled with the coral fragments are omitted.

As described above, since the outer surface 23 of the return protrusion 21 is curved, it can be smoothly inserted into the deposited layer L. Further, since the distance (D) between the return protrusions 21 is set as described above, when inserted, the return protrusions 21 are caught by branch corals or coral fragments and are difficult to come off.
In addition, after installation, algae (not shown) attached to the sedimentary layer L enters from the V-shaped opening 33 on the inner surface 29 side of the return projection 21 and travels through the mountain-like portion of the return projection 21. Because it gets entangled, it is even more difficult to escape.

Hereinafter, the coral artificial prosthesis 41 according to the second embodiment of the present invention will be described with reference to FIG.
The coral prosthesis 41 has substantially the same configuration as that of the coral prosthesis 1 according to the first embodiment, except that the return projections 21 of the insertion portion 43 are alternate.
Thus, even if it becomes the return protrusion 21, it can be used similarly to the coral prosthesis 1 and can enjoy the same effect.

The embodiment of the present invention has been described in detail above. However, the specific configuration is not limited to this embodiment, and the present invention can be changed even if there is a design change without departing from the gist of the present invention. included.
For example, the present invention has technical features in the shape of the insertion portion, and the others can be arbitrarily designed. For example, the coral cultivating section can be used in a conventional shape or an appropriate shape / material. In the case of sexual reproduction, the material of the coral breeding unit should be compatible with larvae.
Furthermore, it is sufficient that there are at least one pair of return protrusions, that is, two or more, and the total number may be an odd number because of the length of the insertion portion 11.

The coral prosthesis 1 according to the first embodiment was used.
The coral prosthesis 1 includes a coral growing part 3 (disk: diameter 30 mm, thickness 20 mm, recess: inner diameter 15 mm, depth 15 mm), insertion part 11 (main body: length 110 mm, plate surface width 20 mm, plate thickness). 8 mm) and the size of the return protrusion 21 (distance (D): 20 mm).
In September 2006, around Kuroshima, Taketomi-cho, Yaeyama-gun, Okinawa, the coral prosthetic device 1 was placed in the sand bottom area (= sand section), gravel bottom area (= sand gravel section), and gravel sediment bottom area (= dead branch skeleton). 30) each was inserted into the three bottom sediment areas (water depth 3m) of the ward), and the results of observing the outflow situation immediately after Typhoon No. 13 passed Yaeyama Islands (September 15, 2006, wave height of about 12m) As shown in FIG.
Although most of the sand bottom area spilled out, 60% was normal in the gravel bottom area, no spilled out in the gravel bottom area, and more than 90% was in the same state as when it was inserted.
This result demonstrates the effectiveness of the artificial prosthesis of the present invention.

  By using the coral prosthesis of the present invention, reef-building corals can be stably cultivated in the gravel sediment bottom region and the gravel bottom region regardless of sexual reproduction or asexual reproduction. Moreover, since the insertion is easy, volunteers can also work.

It is a perspective view of the coral artificial prosthesis which concerns on 1st Embodiment. It is a disassembled perspective view of the coral artificial proliferation tool of FIG. It is the side view seen from the main body board thickness surface direction of the insertion part of the coral artificial proliferation tool of FIG. It is sectional drawing seen when it cut | disconnects with the parting line on the main-body board surface of the insertion tool of FIG. It is the side view seen from the main-body board surface direction of the insertion part of the coral artificial proliferation tool of FIG. It is explanatory drawing of the installation method of the coral artificial proliferation tool of FIG. It is a side view corresponding to FIG. 3 of the coral prosthesis according to the second embodiment. It is a graph which shows the observation result in an Example.

Explanation of symbols

1 ... Coral artificial prosthesis (first embodiment)
DESCRIPTION OF SYMBOLS 3 ... Coral cultivation part 5 ... Concave part 7, 9 ... Groove 11 ... Insertion part 13 ... Main body 15 ... Mountain ridgeline 17 ... Tip part 19 ... Mounting part 21 ... Returning protrusion 23 ... Outer surface 25 ... Outer outline 27 of center part ... Outer contour line of edge portion 29 ... Inner side surface 31 ... Ridge line 33 ... V-shaped opening 35 ... Upper contour line 41 ... Coral prosthesis (second embodiment) 43 ... Insertion portion D ... Return protrusion Distance θ ... V-shaped opening angle L ... Deposition layer

Claims (5)

In the coral prosthesis comprising a coral breeding part and an insertion part,
The insertion portion includes a rod-like innermost plate-like main body, and at least a pair of wing-like return protrusions provided on the outer periphery of the main body.
The coral prosthesis is characterized in that the outer surface of the return projection is a smooth curved surface bulging downward . In the coral artificial prosthesis according to claim 1,
A coral prosthesis characterized in that the lower contour line of the outer surface of the return projection appearing in a side view approximates an arc locus having a radius of 1/2 of the interval between the upper and lower return projections. Proliferator. In the coral prosthesis comprising a coral breeding part and an insertion part,
The insertion portion includes a rod-like innermost plate-like main body, and at least a pair of wing-like return protrusions provided on the outer periphery of the main body.
The coral prosthesis is characterized in that the inner surface of the return protrusion has a mountain shape with a ridge line at the center . In the coral prosthetic device according to claim 3 ,
A coral prosthetic device characterized in that the outer surface of the return projection is a smooth curved surface bulging downward .   Using the coral prosthetic device according to any one of claims 1 to 4, after inserting coral larvae into the coral breeding section or attaching live coral pieces, they are inserted into the gravel deposit bottom area or the gravel bottom area. Coral artificial growth method characterized by inserting a part.

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