JP2003061506A - Artificial proliferation tool of coral reef and method for proliferating coral reef - Google Patents

Abstract

PROBLEM TO BE SOLVED: To develop a technique for intentionally culturing-hermatype without breaking the environment of coral reef. SOLUTION: The purpose can be attained by installing an artificial proliferation tool obtained by fixing an implantation-promoting material composed of one or more implantation plate parts, a spacer part and one connecting and inserting part or fixing an implantation-promoting material obtained by boring a groove or a hole into a round bar or a square bar in the sea.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a coral reef artificial breeding tool and a coral reef artificial breeding method.

[0002]

Reef-building corals can increase colonies both sexually and asexually. In sexual reproduction, eggs and sperm are formed in the gonad within the gastric cavity, and these fertilize and develop into planula larvae. Planula swims using cilia,
It finds a base of attachment and establishes itself there, transforms and begins to live as a polyp, and gradually grows by increasing the number of polyps.

On the other hand, in asexual reproduction, a method is generally used in which fragments produced by destroying colonies are regenerated and fixed again on rocks to grow. Conventionally, reef-building corals have been propagated by utilizing this asexual reproduction habit. That is, a method of breaking a live coral colony into small pieces and directly fixing the broken pieces to an artificial base such as rock or concrete on the seabed with an underwater bond is used, and there are an adhesive method, a mat method, a block method, and the like. There is also a method in which pieces of coral are bound as ropes to a rope or a cylindrical tool as seedlings, cultivated by drooping from a raft below the sea surface, and then transplanted after the corals have grown sufficiently (Japanese Patent Laid-Open Publication No. 7-58242).
-39270 publication). However, the method of breaking off small pieces of a living coral colony damages the coral colony, which is a cause of environmental destruction. If a large-scale transplant is attempted, a healthy coral community will be destroyed, making it difficult to secure a large amount of seeds.

On the other hand, coral larvae land on a tetrapot or a breakwater in the sea, but to land on the tetrapot, there is a "nud" or sand mud that covers the grooves and scratches on the surface of the tetrapot. It is necessary to have good conditions such as that the implantation inhibitors happened to be washed by strong waves or were just installed and not dirty. Moreover, since the period during which coral larvae can be implanted is a short period of about one week per year, it is highly contingent.

Japanese Unexamined Patent Publication No. 11-308939 discloses that
"Mass transplantation method of coral reef seedlings obtained by artificial seedling and coral reef landscaping method" is disclosed. Although the coral is transplanted by fitting it, no specific technique for artificial seedling is disclosed.

[0006]

An object of the present invention is to develop a method for systematically developing reef-building corals without destroying the environment of the coral reefs.

[0007]

DISCLOSURE OF THE INVENTION As a result of diligent efforts to solve the above problems, the inventors of the present invention promoted landing consisting of one or more landing plate parts, a spacer part and one connecting / inserting part. It has been found that the problem can be solved by installing the artificial breeding tool having the base material fixed thereto or the artificial breeding tool having the implantation promoting base material having the groove or hole formed in the round bar or the square bar fixed thereto in the sea.

That is, the present invention (1) is an artificial breeding tool for coral reefs, characterized in that it fixes an implantation promoting base material comprising one or more implantation plate portions, a spacer portion and one connecting / inserting portion. . (2) Spacer thickness is 4 mm to 10 mm
(1) A coral reef artificial breeding device according to (1), (3) Coral reef artificial feature characterized by fixing a landing promoting base material having a groove or a hole on a round bar or a square bar. Breeding device, (4) The artificial breeding device for coral reef according to (3), wherein the groove or hole has a diameter or width of 4 mm to 10 mm and a depth of 4 mm to 20 mm, (5) (1), (2). , (3) or
(4) A coral reef artificial breeding method characterized by installing the coral reef artificial breeding tool described above from one week before coral spawning until the spawning day.

[0009] Coral larvae usually land in holes or crevices in coral reefs, and those that survive and grow appear on the surface. However, 99 people who die without finding an appropriate landing site. % Or more. The coral larvae that cannot be implanted are collected by the implantation-promoting base material. The essence of the present invention is to utilize strong corals that have survived after being raised on the implantation-promoting base material in the post-implantation breeding sea area for about 6 months to 1 year.

The present inventor has conducted extensive research on what form is preferred as the above-mentioned landing promoting base material, and as a result,
(Diameter 5 cm, thickness 1 cm), spacer part (diameter 3 c
It has been found that a shape having a size of m, thickness of 1 cm) and a connecting / inserting portion (length of 4 cm) is preferable. It is also possible to save the adhered organism prevention cap by using a plurality of the landing plate portions and the spacer portions in a superposed manner.
(Figure 1). The connecting / inserting portion functions as a connecting member during the growing stage, and as an inserting and bonding member to a bedrock or the like during the transplanting stage.

[0011] Coral larvae easily land on the lower surface of such a plate, and by setting the distance between the plates to 4 mm or more and 10 mm or less, it is possible to prevent sea urchins from entering and to be less likely to be damaged by eating. In this case, the depth of the coral larvae is 30 mm because the coral larvae are implanted within 15 mm from the outside of the plate.
There is no need for more.

In addition to this, it was also found that as a simple method, a round bar or a square bar can be provided with a groove or a hole to be used as the implantation promoting base material (FIG. 2). Ie 2 cm in diameter and 1 in height
Grooves or holes having a diameter or width of 4 mm to 10 mm and a depth of 4 mm to 20 mm are bored at intervals of 5 to 10 mm on the side surface or the upper surface of a round bar or a square bar of about 0 cm to serve as an implantation promoting base material. The size of the groove or hole is a size that can protect sea urchins from feeding damage.

On the upper surface or the side surface of the floor plate,
It has also been found that coral larvae implant by implanting similar grooves or holes . As the material of the landing plate portion, Amakusa pottery stone, Ryukyu limestone, coral rock, etc. or processed materials thereof, or unglazed clay or stone powder compression molded product, may be used so as to facilitate the landing.

Further, as another implantation promoting base material, FIG.
There is also a shape shown in (a), and it is also possible to provide a fixing member with a pod-like recess (Fig. 3 (b)) and insert the implantation promoting base material of Fig. 3 (a) into it. In any case, it is preferable to cover the lower part of the implantation promoting base material with a case or a cover to prevent organisms from adhering when fixing to the holes.

Since the place for installing the implantation promoting base material can be selected, there is an advantage that it can be implanted from a specific coral species or a community in a specific sea area, and from the place suitable for the implantation. The management can be facilitated by moving to a calm place suitable for growing. Generally, about one month after spawning, transport to the breeding area underwater,
After one year, when they become juvenile corals (seedlings), it is preferable to transport them to the transplant area.

The artificial reproductive equipment for coral reefs is preferably installed one week before spawning until the spawning day.
This is because the surface becomes slimy one week or more before the spawning, so-called "nuts" are attached to prevent the implantation of larvae. Also, after the spawning, the surface of the base material is adapted to seawater 1-2.
Because it takes days, larvae lose their time to easily implant.

The round bar or square bar artificial breeding tool has a diameter of about 2 cm and a depth of about 3 cm to 5 cm drilled on a rock or breakwater of a coral reef with an air driven drill at a density of about 10 pieces per square meter. A method of inserting and adhering can be adopted. The coral reef bedrock has a complicated three-dimensional shape, but the direction of the holes is not limited (Fig. 4).

[0018] In the case of an implantation promoting base material in which a plurality of plate-like materials are superposed at intervals and the plates are connected by columns, this is also fixed to a pedestal, block or coral reef rock so that they also do not move due to waves etc. To do. It should be noted that by fixing it to the pedestal, it is possible to easily move to the landing area, the growing area, and the transplanting area (Fig. 2 (b)). Also, by making a hole in the center of the fixing plate of the frame, the sand and mud accumulated on the bottom plate can be dropped down.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Examples will be shown below for specifically explaining the present invention, but it goes without saying that the present invention is not limited thereto. (Example) In the vicinity of Sesoko Island, the main island of Okinawa, a landing acceleration base material (100 mm x 100 mm, thickness 13 m) with two boards stacked
Table 1 shows the results of observing how many larvae of the coral are implanted, which were set at the time of spawning in June 1997 and collected 3 months later in September (Fig. 5, Fig. 5, Fig. 5, Fig. 5). 6).

[0020]

[Table 1]

Looking at Table 1, even if there are variations, the average value is 69.48 and the standard deviation is 39.40.
Therefore, it was found that the artificial breeding tool is effective. All the coral larvae were implanted on the back side of the board.

[0022]

According to the present invention, corals can be cultivated in a planned manner and without disturbing the environment.

[Brief description of drawings]

FIG. 1 (a) is a diagram (single unit) showing a landing promoting base material comprising a landing plate portion, a spacer portion, and a connecting / inserting portion. (B) is a figure (plural) which shows the landing acceleration | stimulation base material which consists of a landing board part, a spacer part, and a connection / insertion part.

FIG. 2 (a) is a view showing an implantation promoting base material in which holes are formed in a round bar and a square bar. FIG. 6B is a view showing a state where the implantation promoting base material having holes formed in the round bar and the square bar is fixed to the frame.

FIG. 3A is a diagram showing another embodiment of the implantation promoting base material.
(B) is a figure which shows the Example of a fixing member.

FIG. 4 is a photograph showing a round bar having an implantation-promoting base material fixed to coral rock.

[Fig. 5] A photograph showing the experiment being conducted around Sesokojima, the main island of Okinawa.

FIG. 6 is a view showing an implantation promoting base material when an experiment was performed around Sesokojima, the main island of Okinawa.

Continued front page    (72) Inventor Satoshi Nojima             2231 Tomioka, Reikita-cho, Amakusa-gun, Kumamoto Prefecture Kyushu University             Amakusa Rinken Laboratory attached to the Faculty F term (reference) 2B003 AA01 BB04 BB05 DD06 DD07                       EE00

Claims (5)

[Claims] 1. An artificial breeding tool for coral reefs, characterized in that a landing promoting base material comprising one or more landing plate parts, a spacer part and one connecting / inserting part is fixed. 2. The spacer portion has a thickness of 4 mm to 10 mm.
The artificial breeding tool for coral reef according to claim 1, wherein 3. An artificial breeding tool for coral reefs, characterized in that a round bar or a square bar is fixed with an implantation promoting base material having grooves or holes. 4. The groove or hole has a diameter or width of 4 mm to 10 m.
m, depth 4mm-20mm, The artificial-reproduction tool of the coral reef of Claim 3 characterized by the above-mentioned. 5. An artificial breeding method for coral reefs, wherein the artificial breeding tool for coral reefs according to claim 1, 2, 3 or 4 is installed from one week before coral spawning until the spawning day.