JPS638744B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an artificial reef for rearing abalone.

Conventional abalone farming is carried out slowly, using natural underwater reefs, throwing stones, artificial reefs, etc., while simultaneously promoting the growth of seaweed. At present, no consideration has been given to the collection of adult molluscs in the breeding environment, and consistent breeding from juvenile to adult molluscs is not carried out efficiently.

The present invention improves these deficiencies and makes it possible to efficiently grow molluscs from young to adult by taking advantage of their habits. Attachment members consisting of a pair of plates with small gaps suitable for the growth of shellfish and holes for passage of young shellfish are attached in a stepped manner so that some of them overlap, and the spacing between the attachment members is adjusted to accommodate the growth of adult shellfish. The main point is that it has been formed to be suitable for
Furthermore, the second invention is to attach a corrugated plate-like attachment member consisting of a pair of plates having a small gap suitable for the growth of young shellfish and having a hole through which young shellfish can pass, to a concrete frame installed on the seabed. The corrugated attachment members are attached in a stepwise manner so that the parts overlap, and the intervals between the corrugated attachment members are formed to be suitable for the growth of adult molluscs. The main point is that the provisions have been established.

An embodiment of the present invention will be described with reference to the drawings. A concrete underframe 2 has holding frames 1, 1, . The holding frame 1 is installed on the seabed as shown in FIG. They are installed in several stages.

The pair of corrugated plates 3 forming the corrugated attachment member 4 are provided with passage holes 5 for passage of young shellfish, and a hole 5 for passage of young shellfish is formed at the tip.
-15 mm, and are fixed facing each other with a small gap of about 25 to 35 mm at the base end, and the interval between the corrugated attachment members 4 is formed to be about 50 to 60 mm, which is suitable for the growth of adult molluscs.

On the top surface of the corrugated adhesive member 4 or the corrugated peaks on both the upper and lower surfaces, there are one or two protruding stripes 6 with a height of about 20 to 25 mm spaced approximately 400 mm apart in a direction perpendicular to the flow of seawater. The strips are provided to reinforce the strength of the attachment member 4, and at the same time, create stagnation in the flow of seawater flowing particularly on the upper surface or both upper and lower surfaces of the attachment member 4, thereby retaining floating algae and facilitating the feeding of abalone.

Since the embodiment of the present invention is constructed as described above, it is installed on the seabed so that the projections 6 of the attachment member 4 are substantially perpendicular to the flow of seawater to form an abalone reef. Corrugated plates 3, 3 of attachment member 4
The adult molluscs attach and move within the gaps between the attachment members 4 and the outer surfaces of the attachment members 4 through the passage holes 5, and the adult molluscs feed and grow while adhering and moving inwardly or outwardly between the attachment members 4 and the outer surfaces thereof. At the same time, the protruding stripes 6 provided on each attachment member 4, together with the corrugated shape of the attachment member and dust, form a stagnation in the flow of seawater, trapping floating algae and facilitating the predation of abalone.

In the above embodiment, the attachment members 4 are provided on both sides of the underframe 2, but it is of course possible to provide them on one side, and it is preferable to provide the protrusions 6 on both the upper and lower surfaces, but it is also possible to provide them only on the top surface. .

In the present invention, plate-shaped attachment members to which adult and young abalone shells can attach and move are provided in a step-like manner at intervals suitable for the growth of adult shellfish so as to partially polymerize, and each attachment member has a pair of plate-like attachment members having a hole through which the young shellfish can pass. Since the board has a small gap suitable for the growth of young molluscs inside, the overlapping part of the attachment member becomes a hiding place for adult molluscs, and the inside of the attachment member becomes a hiding place for young molluscs, which are predators such as octopuses and others. They adhere to each other in accordance with the growth process while reliably preventing damage caused by shellfish, allowing high-density rearing in a small area and making it easy to collect adult molluscs.

In addition, in the present invention, the attachment member is particularly formed into a corrugated plate shape, and protrusions are formed at the top of the corrugation so as to be orthogonal to the flow of seawater. The dust causes stagnation and causes floating algae to stay, making it easier for the abalone to feed and reinforcing the strength of the attachment member.
It has an excellent feature that enables efficient breeding and growth of abalone from juvenile to adult shellfish.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway plan view of the present invention, FIG. 2 is a longitudinal sectional front view of the same, FIG. 3 is a partially cutaway side view of the same, and FIG. 4 is a side view of the essential parts. 2... Concrete underframe, 3,3... Corrugated board,
4... Adhesive member, 5... Passing hole, 6... Projection strip.

Claims (1)

[Scope of Claims] 1. An attachment member consisting of a pair of plates having a small gap suitable for the growth of young shellfish and having holes through which young shellfish can pass is partially polymerized on a concrete underframe installed on the seabed. The abalone reef is attached in a stepped manner, and the spacing between the attachment members is formed to be suitable for the growth of adult shellfish. 2. A corrugated plate-like attachment member consisting of a pair of plates with a small gap suitable for the growth of young shellfish and a hole for passage of young shellfish is attached to a concrete frame installed on the seabed so that some of the parts overlap. The abalone reef is attached in a step-like manner, and the intervals between the corrugated attachment members are formed to be suitable for the growth of adult shellfish, and the corrugated attachment members are provided with protrusions at least at the top of the corrugated top surface. .