KR20190054880A - Prevention net of swimming larvae dispersion of jellyfish and control method of jellyfish blooms using the same - Google Patents

Abstract

The present invention relates to a prevention net of swimming jellyfish larvae dispersion to prevent mass production of a jellyfish and a method for controlling mass production of a swimming jellyfish by using the same, wherein the prevention net comprises a net configured to cover a lower portion of a floating structure and a net floating means. Accordingly, ephyra larvae is locked in a narrow space in the net and withers in high density before the jellyfish grows to a swimming larvae and disperses to surrounding oceans, and thus dispersion of adults can be fundamentally prevented.

Description

TECHNICAL FIELD [0001] The present invention relates to a jellyfish larval diffusion barrier membrane for prevention of mass production of jellyfish, and a method for controlling mass production of a jellyfish,

The present invention relates to a jellyfish prevention membrane for prevention of mass production of jellyfish, and more particularly, And a method for controlling mass production.

Jellyfish, especially the full moon, Aurelia coerulea , are often mass-produced, causing damage to fish, blockage of the intake of the power plant, and so on. In addition, in the food chain structure dominated by fish as an upper predator, the marine ecosystem changes in the direction that the jellyfish take the place of fish, and the vicious cycle of jellyfish mass production itself plays a vital role. It also threatens. Therefore, there is a need for a national response to the mass production of water jellyfish in full moon.

The full moon water jellyfish is a species that does not flow out of the offshore oceans but sends its larval season in Korea. After approximately June, the adult body (Medusa), which is an adult male body, produces planula larvae by sexual reproduction, and this larvae, like the artificial structure 20 in the water below the sea surface 10, And adheres to the bottom 22 of the hard substrate to live as the polyp 30.

Pollen larvae (30) grow exponentially in population through unsanitary reproduction until the spring of next year. Typically, from April to winter, scyphistoma-type polyps are replicated on an individual basis, and during spring (March), 7 to 20 horses are sacrificed by strobilation, Of the larvae of the strobilia (strobilae) to produce a mass.

Strobilus larvae began to swim as ephyrae larvae (40) as shown in Fig. 1 (b), at the end of March (at the temperature of 10 ° C in the laboratory and around 5 to 7 ° C in the field) It spreads around and grows into medusae-like young adults, which are commonly observed from around April and May. From this time, fishermen, sea-bathers, and power stations and other facilities that use seawater as cooling water are damaged.

Because of these reproductive characteristics, if one does not take into account natural mortality, one full moon water jellyfish polyp can produce up to 5,000 jellyfish adults the following year, according to experimental theory. In terms of biomass, 0.4 μg (one polyp weight) of the polyp becomes 1,000 kg (5,000 adult weight) of jellyfish and increases about 250 million times.

(Korean Patent No. 10-1338510, a jellyfish polyp removal apparatus using low-pressure water), an apparatus for removing an adult body through a grid for cutting (Korean Patent No. 10-1320757, Jellyfish Removal device and jellyfish removal vessel) are known.

However, Korean Patent No. 10-1438510 discloses that it is difficult to completely remove the polyps larvae which are not easily visible depending on the attachment position, and the latter Korean Patent No. 10-1320757 discloses that the jellyfish So that it is caught by the grid while passing through seawater. Therefore, there is a problem that the jellyfish passing away can not be removed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems in the prior art, in particular, in order to prevent large-scale occurrence of jellyfish, Stravilla has taken measures to prevent larval spread before releasing a large amount of epilepsy larvae, To prevent the occurrence of adult jellyfish, and to propose a technique to prevent the massive occurrence of jellyfish, and to prevent the occurrence of massive jellyfish larval spreading prevention membrane and the use of the male type jellyfish And a method for controlling mass production.

In order to accomplish the above object, the swimming type jellyfish dispersion preventive membrane according to the present invention comprises a net provided to cover a lower part of a floating structure immersed in a certain depth below sea level; And a float means connected to the net so that the upper portion of the net covering the lower portion of the floating structure is exposed above the sea level, and the net has a mesh size that can not pass through the swimming type jellyfish larvae .

And one or more burrs may be threaded on the edge of the net.

The net is in the form of a netting with an opening at the top and the inlet is provided with at least one elastic or non-stretchable frame member, and the netting means may be connected to the frame member.

The float means may comprise two or more buoys or two or more slings which may be secured to the floating structure.

The height of the net may be 1.5 to 2.5 times the depth of the floating structure below the sea level, and the net size may be 0.5 to 1.5 mm.

In the mass-production control method of the swimming type jellyfish of the present invention, the above-mentioned swimming-type jellyfish spreading prevention membrane is installed in the floating structure between March and May, and it is removed in April-May to prevent the spread of epilepsy, It is characterized by the lack of food in the state before the Medusa phase.

The present invention has mesh and shelter means for covering the lower part of the floating structure, so that before the jellyfish grows as a male-type larva and spreads to the marine environment, the epilepsy is confined in a narrow space in the net, So that the diffusion of the adult body can be fundamentally prevented.

FIG. 1 is a perspective view of a floating structure below a sea surface, which is attached to the bottom of the floating structure as a polyp, and is seen from the bottom of the sea below the sea surface showing a state where it is spread as epilar larvae to the surrounding ocean.
2 is a perspective view of a network structure of a swimming type jellyfish larval diffusion barrier membrane according to an embodiment of the present invention.
3 is a perspective view of a swimming type jellyfish larval diffusion prevention membrane according to an embodiment of the present invention having the network structure of FIG.
Fig. 4 is a perspective view showing a state (a) of installing the swimming type jellyfish larvae diffusion preventive membrane in Fig. 3 on a floating structure and a state (b) in which epilepsy larvae are confined in a narrow space in the net.
FIG. 5 is a side view showing a state as viewed from direction A in FIG.
FIG. 6 is a perspective view of a swimming type jellyfish larval diffusion prevention membrane according to another embodiment of the present invention having the network structure of FIG. 2. FIG.
FIG. 7 is a perspective view showing a state (a) immediately after the floating type jellyfish larval diffusion prevention membrane of FIG. 6 is installed in a floating structure and a state (b) in which epilepsy larvae are confined in a narrow space in the net.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

The swimming type jellyfish diverging prevention membrane according to the present invention is characterized in that the jellyfish larval diffusion preventive membrane according to the present invention is a diaphragm type diaphragm diffusion preventive membrane according to the present invention as shown in Figures 1 (a) and 2 100).

In the embodiment of FIG. 2, although the net 100 is shown in the form of a netting provided with a predetermined frame member 200 at the upper entrance thereof, it is also possible that one or more pieces of netting are put on the edges of the net, (Not shown).

In the latter embodiment, a quadrilateral planar net is provided with flags independently on each edge surface, and two flags on opposite sides are used to be fixed to the flotation structure 20, Can be used to wrap the lower portion of the structure 20 in a frit pattern.

In the former embodiment, the frame members 200 may be provided on one or more of four sides, as shown in FIG. 2, but may be provided only in a region where the web spacing means described later is fastened. In addition, the material and shape of the frame member 200 may be stretchable or non-stretchable strings, pipes, and other conventional strings without any particular limitation. However, when the frame member 200 is formed of a stretchable material, it is advantageous to tighten the upper opening of the net 100 after covering the lower portion of the floating structure 20. [

4 and 7, the upper portion of the net 100, for example, the frame member 200, which surrounds the lower portion of the floating structure 20, is exposed on the sea surface 10 in each of the above- (300, 400) connected to the base station (100). In the case where the lower part of the floating structure 20 is wrapped in a frieze shape with a quadrilateral flat net (not shown), the two floats used to be fixed to the floating structure 20 may be included in the floatation means .

The embodiment of FIG. 3 is for installing the floating structure 20 as shown in FIG. 4 (a), and the floating means may include two or more buoys 300 connected to the frame member 200 Lt; / RTI > 4 (b) shows the polyp larvae 30 attached to the bottom 22 of the floating structure 20 one to two months after the swimming type jellyfish diffusion prevention film of Fig. 3 is installed, as shown in Fig. 4 (a) (40) and become trapped in a confined space in the network (100), and it will die in a high density state.

Figs. 5 (a) and 5 (b) illustrate views viewed in the direction A in Figs. 4 (a) and 4 (b), respectively.

3, the floating structure 200 is surrounded by the floating structure 200 as shown in FIG. 4 (a), and at least two buoys 300 are installed on the sea surface 10 Therefore, even if a bird such as a typhoon is severe, there is an advantage that the male type jellyfish larva diffusion preventive film does not deviate from the floating structure 20.

6, the network 100 is installed as shown in FIG. 7 (a). The float means is connected to the frame member 200 and is fixed to the floating structure 20 And more than one sling (400; 410, 420). It is possible to directly fasten the two ropes 410 and 420 to the floating structure 20 by fastening the other rope 420 with the fastening member 430 provided on one rope 410 as shown in FIG. As shown in Fig.

7 (b), the polyp larvae 30 attached to the bottom 22 of the floating structure 20 1 to 2 months after the swimming type jellyfish diffusion barrier membrane of FIG. 6 is installed, as shown in FIG. 7 (40) and become trapped in a confined space in the network (100), and it will die in a high density state.

6, the floating structure 200 is wrapped around the floating structure 200 and directly fixed to the floating structure 20 by two or more sling 400 (410, 420) as shown in FIG. 7 (a) There is an advantage that the frame member 200 can be used for various floating structures 20 such as pulling the frame member 200 further above the sea surface 10.

The heights H1 and H2 of the net 100 are set at 1.5 to 2.5 times the depth of the locked depth D in consideration of the depth D at which the floating structure 20 is locked below the sea level 10. In this embodiment, It is preferable that it is double. This is because if the heights H1 and H2 of the net 100 are less than 1.5 times the depth D below which the floating structure 20 is locked below the sea level 10, It is possible to separate the polyp larvae 30 from the mesh 100 due to the friction with the net 100, but if it exceeds 2.5 times, it is difficult to confine the epiara larvae 40 at a high density, .

In the embodiment of FIG. 6, as described above, the edge member 200 of the net 100 is positioned above the sea surface 10 and is used for the floating structure 20 having various locked depths It is preferable that the height H2 of the net 100 is larger than the height H1 of the net 100 in the embodiment of Fig.

The net 100 is required to have a mesh size that can not pass through the swimming type jellyfish larvae. It is necessary to prevent the epila larvae 40 from diffusing into the net 100 so that the mesh size is 0.5 to 1.5 mm considering that the size (diameter) of epilepsy is 2 to 3 mm desirable.

The method for controlling the mass production of the swimming type jellyfish according to the present invention is implemented by installing the swimming type swimming membrane of the swimming type jellyfish according to each of the above embodiments between the months 2 and 3 and removing it in April and May .

Since the polyp larvae 30 need to be installed at the time of falling off the epileptic larvae 40, the end of March (in the laboratory, the water temperature is 10 ° C, the temperature is 5 to 7 ° C Post-war) can be one criterion.

In addition, since the Epila larvae 40 have been impregnated in the net 100 at a high density due to lack of food, the epilator larvae 40 have been removed from Medusa When a child grows into a young adult, he or she can be criticized for lack of food.

According to the method for controlling the mass production of the male type jellyfish according to the present invention, the male type jellyfish larval diffusion preventing film according to each of the above embodiments is simply installed in the floating structure 20 and removed after 1 to 2 months, It grows into larvae and is confined in a narrow space in the net before it spreads to the surrounding ocean, allowing it to be killed at high density to easily prevent adult spread of jellyfish.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments.

10: sea surface 20: floating structure
22: bottom surface 30: polyp
40: Epilah Larvae 100: The Network
200: rim member 300: buoy
400: Rope

Claims (6)

A mesh provided to cover the lower part of the floating structure which is submerged at a certain depth below sea level; And
And a float means connected to the net so that the upper portion of the web surrounding the lower portion of the floating structure is exposed above the sea surface,
Wherein the net has a mesh size that can not pass through the juvenile jellyfish larvae.
The method according to claim 1,
Characterized in that at least one stripe is laid on the edge of the net, and a jellyfish is prevented from being mass-produced.
3. The method according to claim 1 or 2,
The net is in the form of a netting with an opening at the top,
Said inlet being provided with one or more elastic or non-elastic frame members,
Wherein the floating means is connected to the rim member.
The method of claim 3,
Wherein the floatation means comprises at least two buoys or at least two ropes that can be fastened to the floating structure, wherein the jellyfish larval diffusion barrier layer is for prevention of mass production of jellyfish.
5. The method of claim 4,
The height of the net has a magnitude of 1.5 to 2.5 times the depth of the floating structure below the sea level,
Wherein the mesh has a size of 0.5 to 1.5 mm. The jellyfish larval diffusion preventive membrane for prevention of mass production of jellyfish.
The yule-type jellyfish larvae diffusion preventive membrane of claim 5 was installed in the floating structure between February and March, and was removed in April-May to prevent the spread of epilepsy larvae. A method for controlling mass production of a swimming type jellyfish.

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