JP3363414B2 - Artificial seaweed equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for promoting the laying of fish that lay in seawater and lay eggs in coastal seagrass beds such as groupers and herring, and promote seaweed and algae. The present invention relates to an artificial seaweed device that adheres and grows and purifies water. [0002] The catch of groupers and herring in the waters near Japan has been extremely reduced, and one of the causes is that the egg-laying environment of groupers and herring is decreasing. It is known that groupers and herring lay eggs on branches or branches of natural seaweeds, but it is particularly difficult to lay groupers and herring around solid materials such as stone blocks where natural seaweeds have poor growth and prosperity conditions. In addition, there is a case where the growth of seaweeds becomes inadequate due to a change in the surrounding environment of the seaweed bed, and in extreme cases, the reproduction is stopped and the seaweed is burned. On the other hand, there are cases where recovery is attempted by increasing the base by throwing stones, feeding mother algae, and trimming the algae, but the effect is not always good. [0003] The present applicant has proposed an artificial seaweed apparatus for laying eggs in which the shape of a leaf is devised in Japanese Patent Application Laid-Open No. Hei 11-46621 for the spawning reefs of coastal fish using artificial seaweed. No. 75610 proposes an artificial seaweed apparatus for laying eggs that promotes the laying of fish. Further, Japanese Patent Application No. 11-236547 proposes a spawning reef made of artificial seagrass suitable for spawning coastal fish, particularly groupers and herring. [0004] Regarding the assistance and creation of seaweed beds, the present applicant proposed in Japanese Patent Application No. 10-321603 an artificial seaweed in which spores floating in the sea are easily attached and natural seaweeds and seaweed beds can be easily created. Japanese Patent Application No. 10-360672 proposes a method and an apparatus for creating a seaweed bed using artificial seaweed, which grows natural seaweed and seaweed in the sea to create a seaweed bed for sea urchins. [0005] In addition, spawning and breeding of the above fish,
No special measures or effects are known for the purification of the surrounding water, which is a condition for the growth of seaweed beds. According to the present invention, spawning and breeding of coastal fish such as groupers and herring, and attachment and breeding of spores of natural seaweed and seaweed are provided.
And an artificial seaweed device incorporating the results of the applicant's subsequent research on water purification. [0007] The present invention has been made in view of the above, and an object of the present invention is to provide an artificial seagrass device using artificial seagrass that promotes the spawning of fish spawning in coastal seaweed beds such as groupers and herring. Another object is to provide an artificial seaweed device using artificial seaweed for growing natural seaweeds and seaweeds, and to provide an artificial seaweed device using artificial seaweed for water purification. According to the present invention, there is provided an artificial seagrass device which is installed in seawater to promote the spawning of fish spawning on a coastal seagrass bed to attach and grow seagrass and algae. G)
The artificial seaweed (2) is composed of a rod-shaped holding member (3) installed at the bottom and an artificial seaweed (2) held at its lower end.
Is a columnar trunk (5), an elongated first plate-like body (8) having a specific gravity close to seawater attached to the columnar trunk (5) at an interval, and the first plate-like body (8). A second plate-like body (9) attached to the base (8c) and having an elongated flat plate shape, wherein the columnar trunk (5) is formed of a non-toxic, seawater-resistant and large buoyancy. The lower end of the pillar-shaped body (5) is fixed by a tying tool (7) with a holding member (3) sandwiched by a folded part (6) folded in half, and the first plate-shaped body (8) is tightened. The unevenness inside the loose portion (8a) is configured to engage with the unevenness of the string portion (8b) penetrating and tighten. [0009] The columnar trunk of artificial seaweed described above has a height of 0.
It is a 6 to 9 cm prism having a length of 5 to 1 m and a specific gravity of 0.18 gr / cubic cm, which is made of a light and buoyant polyolefin foamed resin. The first branch body has a branch length of 16 cm and a width of 4 cm.
It is formed of a polyamide resin having a specific gravity of 1.1 gr / cubic cm in mm. The second branch has a specific gravity of 0.1.
For example, polypropylene, which is as small as .about.0.4 gr / cubic cm, is formed in a flat string shape, and is usually formed in a linear shape. And
The first branch body 8 is fastened together with the columnar trunk body 5 by the base portion 8c of the first branch body 8 in a folded or wound state. Then, the fish lay eggs on the branches formed by the first and second branches and the columnar trunk. An embodiment of an artificial seaweed apparatus according to the present invention will be described below with reference to the drawings. The embodiment shown in FIG. 1 shows an artificial seaweed device 1 made of artificial seaweed that promotes the spawning of fish such as groupers and herring that lay eggs on a coastal seaweed bed. It is composed of a rod-shaped holding member 3 and an artificial seaweed 2 whose lower end is held by the holding member 3. The artificial seaweed 2 comprises a columnar trunk 5 having a height of, for example, 0.5 to 1 m, and a first elongated branch 8 attached to the columnar trunk 5 at an appropriate interval in an appropriate direction. , The first
And a second elongated body 9 in the form of an elongated flat plate, which is attached by being fastened together by a branch portion 8c of the branched body 8 of the first embodiment. The columnar body 5 is nontoxic, has seawater resistance, and has a large buoyancy, that is, a specific gravity as small as 0.1 to 0.4.
It is preferably formed by antifouling treatment with a polyolefin foamed resin of 0.18 gr / cubic cm. In the present embodiment, it is formed of a 6 to 9 cm prism, but may be a cylinder or the like. The lower end of the columnar body 5 is fixed with a binding member 7 usually called a one-touch clamp, for example, with the holding member 3 sandwiched between two bent portions 6. Referring to FIG. 2 of the top view and FIG. 3 of the local view, the first branch body 8 has, for example, a length of about 16 cm, a width of about 4 mm, and a thickness of about 2 mm. Specific gravity is 1.1
It is formed by antifouling treatment with a polyamide resin of gr / cubic cm. The first branch body 8 is configured such that the unevenness inside the relaxing portion 8a meshes with the unevenness of the penetrating string portion 8b and tightens. As the first branch 8, what is generally called a binding band for electric wires may be used. The second branch 9 has a specific gravity of 0.1 to 0.4.
It is formed in a flat string shape, for example, polypropylene, which is as small as gr / cubic cm, and is usually formed in a straight line shape. Then, the branch portion 8 of the first branch body 8 is folded or wound in two.
It is fastened together with the columnar trunk body 5 by c. Holding member 3
Is formed of a linear steel wire or rope attached to a holding device installed on the seabed G by means not specified. The operation of the artificial seaweed apparatus 1 for promoting the spawning of fish such as groupers and herring by the artificial seaweed will be described. 1 to 3, an artificial seaweed 2 fixed to a holding member 3 installed on a seabed G by a tying tool 7 is shown.
Is suspended in water by the pinching force and buoyancy of the bent portion 6 of the columnar trunk 5. The first branch body 8 branches horizontally at a right angle to the columnar trunk body 8 at a specific gravity close to that of seawater. The second branch 9 is fastened to the columnar trunk 5 at the base 8c of the first branch 8 together. Second branch 9
Is attached in the same direction in a V-shape by folding it in two, and is arbitrarily attached such as in a straight line around the columnar trunk 5 to form a branch or branch Br for spawning. Then, the grouper and the herring lay eggs Eg in the vicinity of the branch or the branch Br formed by the columnar trunk 5 and the branch 8 in accordance with the habit. The egg Eg can be hatched by the artificial seaweed 2 having higher strength and durability than natural seaweed without dropping eggs. ００２４ ００３９ ００３１ ００３１ ００３３ ００３３ ００３３ ００３３ ００３３ ００３５ ００３３ ００３７ ００３５ ００３９ ００３９ ００３７ ００３７. According to the artificial seaweed device using the artificial seaweed of the present invention, The seagrass drops in the water due to the pinching force and buoyancy of the bent portion of the columnar trunk. The first branch has a specific gravity close to that of seawater, and is horizontally and substantially perpendicular to the columnar trunk, and the second branch is formed on the columnar trunk at the base of the first branch. It is tightened together. The second branch is arbitrarily attached, for example, folded in two in the same direction in a V-shape, or in a straight line around the columnar trunk to form a branch for spawning. Then, near the branch or branch formed by the columnar trunk and the branch, the coastal fish such as groupers and herring lay eggs according to the habit. Eggs can be hatched without dropping eggs by artificial seaweed that is stronger and more durable than natural seaweed. In addition, the entire apparatus is simple, easy to manufacture, easy to install on the seabed, and low in cost.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an artificial seaweed apparatus for spawning fish embodying the present invention. FIG. 2 is a view taken in the direction of the arrow X in FIG. 1; FIG. 3 is a top view showing a first branch used in FIGS. 1 and 2; [Description of Signs] G: Seabed 1: Artificial seaweed device 2: Artificial seaweed 3, 13, Holding member 5: Columnar trunk 6: Bending portion 7: Binding tool 8 First branch 8a Relaxing part 9 Second branch

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-11-286918 (JP, A) JP-A-11-75610 (JP, A) JP-A-9-140284 (JP, A) 60569 (JP, U) Registered utility model 3014999 (JP, U) Jikken Sho 36-31870 (JP, Y1) (58) Fields investigated (Int. Cl. ⁷ , DB name) A01K 61/00

Claims (1)

(57) [Claims] [Claim 1] An artificial seagrass device installed in seawater to promote the spawning of fish spawning in a coastal seaweed bed and attach and grow seaweed and algae, installed on the seabed (G) Rod-shaped holding member (3) and an artificial seaweed (2) held at its lower end, and the artificial seaweed (2) is spaced apart from the columnar trunk (5) and the columnar trunk (5). An elongated first plate-like body (8) having a specific gravity close to that of seawater and a first plate-like body (8) attached separately
And a second elongated plate-shaped body (9) attached at the root portion (8c) of the base, and the pillar-shaped body (5) is formed of a non-toxic, seawater-resistant and highly buoyant body. The lower end of the pillar-shaped body (5) is fixed by a tying tool (7) with the holding member (3) interposed therebetween by a bent portion (6) folded in two,
An artificial seaweed apparatus characterized in that the unevenness inside the loosened portion (8a) of the first plate-shaped body (8) engages with the unevenness of the penetrating string portion (8b) and tightens.