JP2001275514A - Artificial spawning reef for broad-mantle squid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an artificial spawning reef for broad-mantle squid effective for solving the defects of conventional artificial spawning reef and increasing the amount of spawn of the squid. SOLUTION: A number of thin and long spawning bases 20 such as rods usable as a substitute for the stalk of sea grass are erected on a base 10 to be settled on the sea bottom, etc. An imitation spawn 30 of broad-mantle squid is attached to one or plural parts of the spawning bases 20 erected on the base.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial laying squid of a squid.

[0002]

2. Description of the Related Art Auliika, a kind of useful seafood used as a live fish, is known to produce a white egg mass near the root of seaweed such as overgrown squid. The egg mass is firmly attached to the seaweed and the like so as not to be washed away by the sea current and the like. One egg mass in nature is about the size and diameter of two or three human adult fists arranged side by side, and the color is milky white, soft, and resembles a taraco. Hundreds of fertilized eggs are contained in this egg mass, and when the time comes, a large number of juvenile squid will break out of the egg mass and jump out into the sea, immediately starting a floating life. In recent years, spawning reefs for Aori squid have been artificially manufactured and installed underwater. Conventionally, as shown in FIG. 2, an artificial spawning reef is used in which a rod-shaped spawning base 2 such as a reinforcing bar having a length of about 1 m is protruded from a reinforced concrete base 1 at an appropriate interval. I was

[0003]

However, the above-mentioned conventional artificial spawning reef is, of course, not without a considerable effect, but it has yet to be spawned in a sufficient amount as a place for spawning Aori squid. Did not. Therefore, an object of the present invention is to solve the above-mentioned drawbacks of the conventional artificial spawning reef, and to provide an artificial spawning reef of Aori squid that can perform more spawning of Aori squid.

[0004]

In order to achieve the above-mentioned object, the artificial spawning reef of the squid of the present invention is provided on a base landed on the seabed or the like, and has a long and thin rod-like shape as a substitute for seaweed stems. The first feature is that a large number of egg-laying bases are erected, and a pseudo egg mass of a blue squid is attached to one or more of the multiple laid egg-bearing bases. In addition, the artificial spawning reef of Aori squid of the present invention, in addition to the first feature,
The second feature is that the spawn substrate erected on the base is a rod. The third feature of the artificial spawning reef of Aori squid of the present invention is that, in addition to the first feature, the spawning base erected on the base is a simulated seaweed having a stem. The fourth feature of the artificial spawning reef of Aori squid of the present invention is that, in addition to any of the above first to third features, the simulated egg mass is attached to the spawning base by means of a string or the like.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail by describing embodiments of the present invention with reference to the drawings.
FIG. 1 is a schematic perspective view of an artificial spawning reef of a squid according to the present invention.

In FIG. 1, an artificial spawning reef has a base 10 that lands on the sea floor or the like, a large number of spawn bases 20 erected on the base 10, and is attached to the spawn base 20. And a simulated egg mass 30.

The base 10 can be made of reinforced concrete, but may be made of metal, and the material is not particularly limited. An appropriate material is selected in consideration of environment, durability, manufacturing cost and transportation cost. The spawn base 20 can be constituted by erecting a large number of rods such as reinforcing bars on the base 10. For example, the rod-shaped body can have a length of 100 cm and a standing interval of 10 cm. However, the length of the rod is 50 cm.
There is a certain degree of freedom, for example, about 150 cm, and the standing interval is about 8 cm to 25 cm. Regarding the horizontal cross-sectional shape, thickness, length, and standing interval of the rod-shaped body, the size that the squid prefers for spawning will be obtained in advance by experiments in consideration of the state of the seabed to be installed and the water depth etc. . Further, the spawn substrate 20
Can be simulated seaweed having stems to resemble seaweeds such as squid, which is preferred by the squid. The spawn substrate 20 is
The base 10 can be made detachable by screwing or the like. As a result, the final attachment of the spawned substrate 20 to the base 10 can be performed at a place close to the site, the bulk of the artificial spawning reef during transportation and storage can be reduced, and the storage cost and transportation cost can be reduced. it can.

The shape, color, size, etc. of the simulated egg mass 30 should preferably be similar to the real egg mass of the squid, but the degree may be such that the squid is recognized as a squid egg mass. Specifically, the shapes, colors, sizes, and the like need only be similar. The material of the simulated egg mass 30 is less pollutant and any material that can give a feeling similar to the real thing is sufficient. The dummy egg mass 30 is attached in consideration of the height from the base 10 and the orientation of the egg mass so that the egg mass of the blue-green squid is laid and close to a state where it is actually attached to the stem. Regarding the mounting height and direction of the egg mass 30, a preferable height and direction are obtained in advance by experiments.

The simulated egg mass 30 is attached to the egg substrate 20 by, for example, penetrating a part of the simulated egg mass 30 with a metal wire, a plastic wire, or a string made of other material. It can be attached by tying it to the spawning base 20. However, the coupling means is not limited to the string. It is also possible to attach the simulated egg mass 30 to the egg-generating substrate 20 by using an adhesive as a bonding means.

[0010] The squid has a habit of sequentially coming to the spawning ground in a group, but if there is an egg mass of the first squid group in the seaweed area, that is, if there is already an egg mass at the root of the seaweed when the squid comes in It has recently been found that subsequent flocks of Ariika have a tendency to lay eggs there. The present inventor has completed the important invention, which is a very fundamental invention but has not been noticed until now, by knowing the habit of spawning of this squid.

[0011]

According to the present invention, there is provided the above construction.
According to the artificial spawning reef of the squid described in the above, a large number of elongated spawned base such as a rod-shaped substitute for the stalk of seaweed is erected on a base that lands on the sea floor or the like, and the large number is erected. Since the squid egg mass of the squid is attached to one or more places of the spawning substrate, the group of the squid that has come to the artificial spawning reef finds the simulated egg mass attached to the spawning substrate there. While recognizing that there is an egg mass, it also recognizes that the location is a place where eggs can be laid with confidence, and successively lays egg masses on the spawn substrate. Therefore, according to the artificial spawning reef of the squid according to the first aspect, a large number of eggs can be efficiently produced on the squid. According to the artificial spawning reef of the squid according to the second aspect, in addition to the effect of the configuration according to the first aspect, the spawned base erected on the base is a rod-shaped body, It plays a role as a seaweed stalk, which is a spawning place, and can provide a place suitable for actual spawning. According to the artificial spawning reef of the squid according to the third aspect, in addition to the effect of the configuration according to the first aspect, the spawning substrate erected on the base is a pseudo seaweed having a stem. In addition, the environment as a seaweed group, which is a place for laying a blue squid, and the environment as a stem of the seaweed can be further prepared, and the laying of blue squid can be further promoted. According to the artificial laying squid of the squid according to the fourth aspect, in addition to the effect of the configuration according to any one of the first to third aspects, the pseudo egg mass is attached to the laying egg base by means of a string or the like. As a result, the simulated egg mass can be freely attached to an appropriate place later. Therefore, it is possible to repair the artificial spawning reef many times by removing the spoiled egg mass that has been damaged and spoiled, and newly attaching the artificial egg mass to the spawning base.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of an artificial spawning reef of a squid according to the present invention.

FIG. 2 is a schematic perspective view showing an example of a conventional artificial spawning reef of Aori squid.

[Explanation of symbols]

 Reference Signs List 10 base 20 spawned substrate 30 artificial egg mass

Claims (4)

[Claims] 1. A large number of elongated spawning bases having a rod shape or the like as a substitute for seaweed stalks are erected on a base landed on the seabed or the like, and one of the plurality of erected spawning bases is provided. An artificial laying squid of Aori squid, characterized by having simulated eggs of Aori squid at multiple locations. 2. The artificial spawning reef of Aori squid according to claim 1, wherein the spawning base erected on the base is a rod. 3. The artificial spawning reef of claim 1, wherein the spawning substrate erected on the base is a simulated seaweed having a stem. 4. The artificial laying squid of claim 1, wherein the artificial egg mass is attached to the egg-laying substrate by means of a string or the like.