JPH0356199Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a cultivation device for creating a seaweed bed, and more specifically, a cultivation device for creating a seaweed bed that improves the adhesion of spores such as algae floating in seawater or fresh water. The present invention relates to a culture device for use in culture.

This cultivation device for creating a seaweed bed is used for creating a seaweed bed, or is used for creating an underwater forest by growing a forest in the sea.

[Conventional technology]

Many of Japan's coasts are not ideal environments for fishing, as the sea denudation phenomenon prevents algae spores from forming, and there is insufficient growth of algae for species such as porgy and snails.

In other words, if algae (phytoplankton) occurs in sea areas, zooplankton will be cultured and produced, but if algae do not occur, the amount of dissolved oxygen in seawater will be low, and there will be a lack of food for fish and shellfish. .

In view of the above points, there is currently an urgent need to create seaweed beds in Japan's coastal waters based on the Coastal Fisheries Development Act.

In conventional seaweed bed creation, adding natural stones,
Inserting concrete blocks of various shapes,
Alternatively, new rock surfaces are exposed by destroying rocks that have caused the rock formation phenomenon.
In these cases, the amount of adhesion of algae spores, etc. is not necessarily large, and it cannot be said that a sufficient seaweed bed is created.

Usually, kelp etc. are inoculated into ropes. In this method, a rope is twisted back by force, then inoculated, and then tightened again, but this can damage the spores and crush the buds, and the process is laborious. Furthermore, it cannot be said that algae spores easily and sufficiently attach to this rope.

[The problem that the idea aims to solve]

The purpose of the present invention is to overcome the above-mentioned problems, and to improve the adhesion of spores such as floating algae in the natural world, and to provide a cultivation device for creating seaweed beds that is suitable for creating seaweed beds and is suitable for underwater forests. shall be.

[Means to solve the problem]

The cultivation device for creating a seaweed bed of the present invention has a cylindrical core formed by rolling felt, a net-like outer cylinder that covers the outer circumferential surface of the core, and an inner circumferential surface of the core. A culture body consisting of a net-shaped inner cylinder portion that covers the culture body, upper and lower lid bodies each disposed above and below the culture body and having a through hole bored in each center, and a corresponding one of the upper and lower lid bodies. inserted into the through hole and arranged between the upper and lower lid bodies;
A fixed rod-shaped body.

The felt may be a known one (for example, needle felt, woven felt, compressed felt).
can be used. The fibers used for this felt may be organic or inorganic, but organic fibers are preferred. This is because spores adhere better. Also, among organic fibers, synthetic fibers such as nylon, polyester,
Polyacrylonitrile, wholly aromatic polyamide, etc. are preferred. This is because synthetic fibers have excellent mechanical strength, seawater resistance, weather resistance, and the like. This felt is also rolled into a cylindrical shape. With this cylindrical shape, wave resistance is low, the rod-shaped body can be easily inserted into the inner cylinder, and a dim space can be provided. In addition, as a reference example, as shown in FIG. 1, a cylindrical shape consisting of a rolled core 2 and a net-like reinforcing part 3 covering the outer peripheral surface of the core can be cited.

The size of the mesh constituting the reinforcing portion may be as long as it can be inoculated, but preferably 2 to 20
mm, more preferably 10 to 15 mm. Further, the threads constituting this net are usually 0.3 to 0.9 mm, but any thread that has some degree of rigidity and can hold the inner core may be used. The main culture body has lids above and below the core.
It is possible to connect to a holding body such as a string through this lid body.

The above-mentioned culture body can have inside thereof a lumpy ceramic far-infrared emitter having an excellent function of absorbing and emitting far-infrared rays. As this material, for example, one obtained by mixing vegetable cellulose and steel slag, molding and firing the mixture ("Biostone" trade name, manufactured by Ozakura Marine Research Institute) can be used. Also, this far-infrared emitter can be made into various shapes and sizes depending on the purpose, the size of the inner cylinder, etc., but it is usually in the shape of a mazetsuk, with a size of about 32 x 32 x 25 (t) mm. things are used.

The above-mentioned culture device can be held in water by a holder. As shown in FIG. 5, this holding body may consist of a weight 7, a float 8, and strings 9a and 9b that hold the culture between the weight 7 and the float 8. can. Alternatively, as shown in FIG. 6, this may be a weight 7a fixed to the culture device. The former allows the culture to float in the middle of the water, while the latter places it on the bottom of the water. In these cases, rather than tying the outer periphery of the culture with a rope and fixing this rope to a weight, etc., it is more convenient to provide lids above and below the culture and fix the weight, etc. with through bolts and nuts. It is. This is because in this method, the rope or the like does not rub the outer periphery of the cultured body and crush the buds.

〔Example〕

Hereinafter, the present invention will be specifically explained with reference to Examples.

The cultivation apparatus for creating a seaweed bed used in this example is shown in FIGS. 2 and 4. The culture body 1 of this culture device includes a cylindrical core part 2a formed by rolling a needle felt, a net-like reinforcement part (outer cylinder part) 3a that covers the outer peripheral surface of the core part 2a, and an inner part thereof. It is a cylindrical body (length 5 m, outer diameter 20 cm, inner diameter 10 cm) consisting of a reinforcing member (inner cylinder part) 3b that covers the circumferential surface. Both the inner tube 3b and the outer tube 3a have a mesh size of 10 to 15 mm, and the outer diameter of the thread is 0.5 to 0.7 mm.
It is plain woven and is made of a blend of various rigid fibers such as nylon-6.6 and polyester. Then, as shown in FIG.
A nut was then tightened at the lower cap (not shown) to construct culture body 1.

This culture is grown in the upper cap 4 as shown in Figure 5.
a, float 8 and string 9b, and lower cap 4.
A weight 7 was connected and held by a string 9a and thrown into a predetermined sea. In addition, each cap 4a, 4b has the following:
A string locking tool 6 for connecting (locking) the string is formed.

Water-based bacteria colonize this culture device from the 5th to 7th day, and in the summer, from around the 10th day, sea lettuce, green algae, and sponges such as staghorn seaweed colonize, and in the winter, kelp and floating algae from the sea area colonize for about 30 days. It begins to grow. Incidentally, spores of high value-added algae can also be inoculated in advance.

The main culture device has a cylindrical culture body made of a needle felt. Therefore, this culture device can exist stably in the sea with low wave resistance, and since the organic fibers of this felt are intertwined as shown in Figure 3, the adhesion area is extremely large, and it is also suitable for phytoplankton and animals. Because sexual plankton contains these organic materials, spores tend to attach to them. still,
Figure 3 is a micrograph (magnification: 50) of felt (needle felt). The white part shows the fibers, and the black part shows the space. In this needle felt, the web fibers are not bundled and separated. This is what we are doing. Furthermore, since this felt is made of synthetic polymer, it will not corrode in seawater.

Furthermore, since the main culture device has a predetermined mesh-like reinforcing portion, it has appropriate rigidity, the felt portion is firmly held, and inoculation is easy. In addition, in this culture device, the holder such as a string is connected to the upper and lower caps via a string locking device, and the string etc. does not rub the outer periphery of the culture body, so buds such as spores exposed from the mesh,
It does not damage or delete growing kelp etc. Further, since the rod-shaped body is fixed by tightening a nut at the lower cap, the culture device can be easily assembled or disassembled.

[Effect of idea]

The cultivation device for creating a seaweed bed of the present invention has a cylindrical core formed by rolling felt, a net-like outer cylinder part and an inner cylinder part, and is arranged between upper and lower lid bodies and the middle thereof. It has a rod-shaped body. Therefore, since the main culture device has a significantly large adhesion area, when it is immersed in water such as seawater, it can significantly improve the adhesion of spores of algae, etc. floating in the natural world. It has little resistance and can be easily assembled, and furthermore, a holder such as a string can be easily attached without rubbing the outer peripheral surface of the culture body. Therefore, by using the main culture device, it is possible to easily create a seaweed bed, and by setting up a large number of this device, it is also possible to facilitate the creation of an underwater forest. In addition, in the main culture device, there are no seasonal restrictions and the equipment cost is extremely low just by assembling it.

[Brief explanation of the drawing]

Figure 1 is a plan view of a cylindrical reference culture;
The figure is a plan view of the culture body used in the example before attaching the cap, Figure 3 is a micrograph showing the shape of the felt fibers used in the example, and Figure 4 is the culture body used in the example with the cap. A partial sectional view of the culture body, FIG. 5 is an explanatory diagram showing a state in which the culture device for creating a seaweed bed according to the example is placed in the middle of the sea,
FIG. 6 is an explanatory diagram of a cultivation device for creating a seaweed bed placed on the seabed. 1...Culture body, 2...Core part, 3...Reinforcement part, 4
... Cap, 5 ... Through bolt, 6 ... String holder, 7 ... Weight, 8 ... Float, 9 ... String.

Claims (1)

[Claims for Utility Model Registration] (1) A cylindrical core formed by rolling felt, a net-like outer cylinder that covers the outer circumference of the core, and an inner circumference of the core. A mesh-like inner cylinder part that covers the
a culture body, upper and lower lids each disposed above and below the culture body and having a through hole drilled in the center of each; A cultivation device for creating a seaweed bed, comprising: a rod-shaped body disposed and fixed between the lid bodies of the invention. (2) The culture device for creating a seaweed bed according to claim 1, wherein the fibers constituting the felt are organic synthetic fibers.