JP3957279B2 - Underwater plant breeding collection - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fish material for raising marine plants .
[0002]
[Prior art]
In the sandy mud bottom of the coastal area around the inner bay of Japan, where the depth of water is about 0 to 10m, marine flowering plants such as sea bream and sugamo, and seaweeds such as kombu and seaweed thrive. These submarine plant colonies are generally called algae ponds and serve as spawning grounds for various seafood and as well as larvae as well as adults. It has a function.
[0003]
One type of fishing, which is one of the methods for obtaining the aquatic products bred in this way, is to scatter fish collection materials and to catch the places where fish have gathered. The fish-collecting material used for fishing is usually called “rice bait (Komase)”. Raw materials such as frozen trout, frozen krill, sardine mince, or starchy materials such as sweet potato, mashed potato, and okara, red soil, and potato flour The main ingredients are mixed according to the taste of various fishes.
[0004]
[Problems to be solved by the invention]
However, the growth environment of marine plants has deteriorated due to the recent increase in landfill construction, water quality associated with daily and industrial wastewater, bottom sediment pollution, and sand runoff due to changes in sand drift, and the area and density are decreasing nationwide. It has become one of the causes of sea erosion due to a decrease in catch and runoff of sand.
[0005]
Therefore, many methods have been proposed for artificially creating seaweed beds as a means of improving fisheries and restoring nature, for example, by transplanting cultured eel stocks directly to the seabed by divers. There was a problem in terms of cost.
[0006]
On the other hand, conventionally used bait consisting of small organisms such as krill is basically bait composed mainly of organic matter, and when a large amount of bait is administered concentrated in some seas such as fishing grounds, There is a risk of marine pollution. In particular, it has been pointed out that the oil contained in organic matter settles on the sea floor near the bay, causing the destruction of the marine environment. In addition, it is difficult to preserve firewood baits such as krill, so the remaining firewood bait is often thrown into the fishing grounds, which is a factor in spurring environmental destruction.
[0007]
The present invention has been made in consideration of the above-mentioned matters, and by performing fishing using a fish collection material, it is possible to easily reproduce marine plants such as sea cucumbers at low cost, The object is to provide a marine plant breeding collection material that improves the environment and promotes the increase of aquatic products.
[0008]
[Means for Solving the Problems]
That is, the marine plant breeding and collecting material according to the present invention is characterized in that it contains a breeding body of marine plants such as sea cucumbers that settle on the seabed and germinate and grow , and a bait .
[0009]
According to the above configuration, underwater plant propagation bodies (hereinafter simply referred to as propagation bodies), that is, natural propagation bodies such as seeds, rhizomes and spores, artificial propagation bodies produced from embryonic cells, etc. It is thrown together with bait by humans and settles down to the bottom of the sea.
[0010]
Eventually, it will germinate and grow in the area to form an algae basin and grow further aquatic products.
[0011]
According to the above method, the seeder of the breeding body is an angler, and it is possible to create a seaweed bed without requiring special construction or labor costs. In addition, anglers can enjoy fishing safely without feeling negative about the environmental degradation caused by the use of thatched bait.
[0012]
In addition, marine plants, especially marine flowering plants, have the effect of absorbing nutrients from seawater and seabed mud, so even if excess fish collection material is used, it is decomposed and absorbed, and eutrophication, etc. It will prevent the deterioration of the marine environment.
[0013]
It is also possible to use an underwater plant growth material in which the propagation material is coated with a soil improvement material (Claim 2). In this way, the weight of the soil improvement material is added to the soil, and the material is subsided more quickly. Less likely to be preyed on by aquatic products. In addition, since the breeding body sinks in the immediate vicinity of the throwing place, it can be sown in the desired growth place. Furthermore, since the coating portion serves as a growth base and fertilizer for undersea plants, it is suitable for improving germination rate and growth potential.
[0014]
In addition, the limit shields number is larger than that of a single propagation body, and the stability against waves is higher than that of sand mud constituting the seabed. This makes it easier for the propagules to be buried in the seabed and to create an environment in which marine plants can easily grow.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an example of a method of using the underwater plant growing fish material according to the present invention.
[0016]
The underwater plant growing and collecting material 1 is composed of a propagation body 3 of the underwater plant 2 and a fired bait 4 that are mixed almost uniformly. As used herein, the undersea plant 2 refers to marine flowering plants that grow by seeds, such as eelgrass plants such as eelgrass and core dolphins, zionidaceae plants such as veneer larvae and Ryukyu eelgrass, and staghornids such as sea leeks and ryucus duck. It also refers to all plants that grow in the sea, such as seaweeds such as kombu and wakame.
[0017]
In addition, the bait 4 includes a shrimp system such as shrimp and krill, a shrimp system such as white shrimp and bush shrimp, a fish system such as scallop mince and pupa, a fish meat system such as sardine mince and millet, and a base of fired food such as okara and bread crumbs. It is made up of things that are mixed in as appropriate according to the target fish species. In addition, this invention is not limited to said example, It can apply to all the bait 4 used for fisheries, such as fishing and aquaculture.
[0018]
At the time of use, first, the underwater plant growing fish material 1 in which the breeding body 3 and the bait 4 are kneaded is picked up with a coconut or the like and thrown at a target point of the sea S. After entering the sea, the underwater plant growing fish material 1 is separated and dispersed due to the difference in specific gravity of each component.
[0019]
At this time, since the breeding body 1 has a higher specific gravity than seawater, it naturally settles down to the seabed A and settles down. Then, it will germinate and grow in the area, and form a seagrass bed that will serve as a place for fishing and reproduction of the new aquatic product 5.
[0020]
The formed algae ground decomposes and absorbs nutrient salts from the seawater and the seabed A, and prevents marine environment deterioration such as eutrophication in the sea due to excessive sowing of the bait 4.
[0021]
As the above-mentioned undersea plant 2, the above-mentioned various seeds can be used. For example, when using seeds originally native to the place of use, such as eelgrass in the Chugoku region and Ryukyu eel in the Okinawa area, It is preferable without disturbing the ecosystem.
[0022]
As described above, the bait 4 can be applied to any food, but it is preferable to use a component that is decomposed under natural conditions.
[0023]
FIG. 2 shows the underwater plant growing material 6. This underwater plant growing material 6 is obtained by covering one or more propagation bodies 3 with a covering material 7 and solidifying it.
[0024]
The covering material 7 is mainly sand mud 8 like the seabed A, and a mixture of fertilizer 9 with biodegradable resin coating is used, but it is not limited to this composition and is necessary. Depending on, soil improvement materials such as organic bark and peat moss may be added. Further, as the fertilizer 9, it is possible to select other slow-acting or immediate-acting fertilizers such as a super slow-acting fertilizer. Here, the so-called soil improvement material refers to a material that improves the natural physical and chemical properties and microbial properties of the soil for the purpose of enhancing the fertility and productivity of the soil. To do.
[0025]
Then, the surroundings of one or a plurality of propagation bodies 3 are covered with the covering material 7 and solidified by an appropriate method such as compression formation or biodegradable resin coating, and the undersea plant growing material 6 is constructed.
[0026]
According to the above-mentioned underwater plant growing material 6, since the specific gravity and the weight are increased as compared with the propagating body 3 alone, the sedimentation speed is increased and it is less likely to be preyed on by the fish. Moreover, since it sinks directly below the throwing spot, it is possible to sow the desired breeding spot.
[0027]
Moreover, since it becomes easy to be buried in the seabed A, it is stable, and the covering part of the propagation body 3 becomes a growth base and fertilizer, so that the germination rate of the propagation body 3 can be improved.
[0028]
The size of the undersea plant growing material 6 can be appropriately set, but when the maximum diameter in plan view is preferably set to 0.2 cm to 20 cm, more preferably 0.5 cm to 5 cm, the surface of handling and bottoming situation It is effective.
[0029]
The shape can be appropriately selected from a spherical shape, a chestnut shape, a polygonal shape, a plate shape, a disc shape, and the like, but a shape having a large bottom shear stress or bottom friction rate, for example, a substantially rectangular parallelepiped, and the limit of the undersea plant growing material 6 It is desirable that the number of shields is 0.12 or more, more preferably 0.3 or more.
[0030]
Here, although the Shields number is generally used as an index representing the stability against waves and the like on the seabed A, the moving limit Shields number in the case of the fine sand 10 (representing that the sand does not move) is about 0.11. It is said that.
[0031]
One of the conditions for burying an object in sand is that the buried object has a greater resistance to movement than sand. That is, the surrounding sand moves to some extent, but the object is buried in the sand under the condition that the object does not move.
[0032]
Therefore, as shown in FIG. 3, by setting the limit shields number of the undersea plant growing material 6 to be larger than that of the fine sand 10, it is buried in the sea area where the sand moves moderately (a situation where the shields number is larger than 0.11). The condition can be easily adjusted, and the breeding body 3 can be buried in the seabed A to create a stable germination situation.
[0033]
【The invention's effect】
As described above, according to the present invention, in the fish collection material used for fishing and fishery, at least a marine plant propagation material can be mixed to form a seaweed bed at a low cost, thereby improving the marine environment. Can contribute.
[0034]
In addition, by covering the surroundings of marine plant propagation bodies with a coating material, the specific gravity, weight, and limit shields number increase, thereby improving the sedimentation speed and facilitating burial on the seabed. Because it becomes a growth base and fertilizer, it becomes possible to germinate marine plants stably.
[Brief description of the drawings]
FIG. 1 is an overall view showing a first embodiment of the present invention.
FIG. 2A is a perspective view showing a second embodiment of the present invention.
(B) is sectional drawing which shows the 2nd Embodiment of this invention.
FIG. 3 is a diagram showing a process of burying in the sea floor according to the second invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Underwater plant breeding collection material, 2 ... Underwater plant, 3 ... Propagation body, 4 ... Thatched bait, 5 ... Aquatic product, 6 ... Undersea plant growth material, 7 ... Cover material, 8 ... Sand mud, 9 ... Fertilizer, 10 ... Fine sand, S ... sea, A ... sea floor

Claims (2)

And marine plant propagation material and germinating grow bottom landing on the seabed, underwater plant growth Fish material characterized by containing ground bait. Underwater plant growth Fish material according underwater plant propagation material to claim 1, wherein the such coated with soil improving material Turkey.

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