JP4877828B2 - Algae breeding member - Google Patents

Description

  The present invention relates to an algal growth member for growing and growing algae forming an algae field.

  As a measure to create a good fishing ground by creating a new seaweed place in the place where the seaweed place has not existed before, more effectively recovering the seaweed place that has disappeared due to the so-called firewood burning phenomenon, etc. A detachable algae growth member has been considered in which the function of growing and multiplying and the function of holding on the sea floor are considered separately, and these can be detachably attached (see, for example, Patent Document 1).

  The algae growth member includes an algae growth member main body capable of growing and activating algae, and a pedestal member capable of holding the algae growth member main body on the seabed.

The method of using the algae growth member is as follows. First, the algae is initially cultured from the spores or intermediately cultured from the young buds in a growth zone suitable for growth using the algae growth member main body, and grown until the algae reaches a certain size. Next, the algae growth member main body to which the grown algae adheres is transferred and attached to a pedestal member installed on the seabed, which is the formation area of the algae basin. By arranging a plurality of algae-growing members used on the seabed in this way, a seaweed bed can be created.
Japanese Patent No. 3532865

  However, there are shellfish and sea urchin predators (hereinafter referred to as “vegetable shellfish etc.”) that cause food damage that causes firewood burning on the bottom of the sea. Even after the relocation, there was a problem that the vegetative shellfish and the like climbed on the upper surface side of the algae growth member body and ate the algae.

  For this problem, measures such as installing a fence around the algae breeding member that can prevent the invasion of herbivorous shellfish etc. are considered, but installation of the fence etc. requires large-scale equipment and installation work Therefore, time and cost burdens are large, and it is not necessarily an appropriate measure for algae growth members arranged on the seabed.

  The present invention has been made paying attention to such a problem, and its main purpose is to avoid algae damage such as herbivorous shellfish that inhabit the sea floor with a relatively simple configuration and to cultivate algae. The object is to provide an algae growth member capable of producing algae.

That is, the algae growth member of the present invention is an algae growth member comprising an algae growth member main body capable of growing and activating algae, and a pedestal member capable of holding the algae growth member main body on the seabed, all SANYO obtained by forming a gap between the outer peripheral edge near the algal growth member body and the base member, the gap is between the base member and the algal growth member body, interposed spacer member The algae growth member main body comprises a thin plate-like plate member having a plurality of protrusions on the surface, and the pedestal member has a back surface on the sea bottom. A thin plate-shaped pedestal plate portion that can be attached, and a main body connection portion that is disposed on the pedestal plate portion and can be connected to the algae growth member main body, wherein the gap is the algae growth Herbivory trying to penetrate the surface of the body The alga is set to a length of 1 to 3 cm, which is shorter than the length in the height direction of the algae and is difficult for the vegetative shellfish to ride on the upper surface side of the algae growth member main body. the outer peripheral edge of the growth member body, and wherein the Rukoto been moved limitations of the plant food shellfish.

In such a case, due to the gap formed between the vicinity of the outer periphery of the algae growth member main body and the pedestal member, the herbivorous shellfish that inhabit the sea floor cannot ride on the algae growth member main body, The damage caused by shellfish can be effectively avoided. Moreover, if a gap is formed between the vicinity of the outer peripheral edge of the algae growth member main body and the pedestal member, it is possible to avoid damage caused by vegetation shellfish, so that it does not require large installations such as fences, and is practical. It will be rich.

  In addition, the said clearance gap can be formed by interposing a spacer member between the said algal growth member main body and the said base member.

  Moreover, if the algae growth member main body is provided with a thin plate-like plate member having a plurality of protrusions on the surface, a place where algae grows and settles well can be provided. In addition, since it can be configured using a lightweight member, it is easy to use in a relocation work or the like.

  The pedestal member is capable of holding the algae growth member main body on the sea floor, and is disposed on the pedestal plate part, the back surface of which can be attached to the sea bottom, and the algae growth The main body connection part which can be connected with a member main body shall be comprised.

The “vegetable shellfish” specifically refers to shellfish such as Sazae, Koshida Gangara, Kubogai and the like.

As described above, according to the present invention, it is possible to provide an algae growth member capable of avoiding the damage of vegetation shellfish that inhabits the bottom of the sea with a relatively simple configuration.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 to 5, the algae growth member P of the present invention has an algae growth member main body 1 capable of growing and activating algae (not shown), and a pedestal capable of holding the algae growth member main body 1 on the seabed. A spacer member S that is interposed between the member 2 and the algae growth member main body 1 and the pedestal member 2 and that can form a gap g between the vicinity of the outer peripheral edge r of the algae growth member main body 1 and the pedestal member 2; It has.

  The algal growth member main body 1 includes a thin plate-like plate member 11 in which a first protrusion 111a, a second protrusion 111b, and a third protrusion 111c, which are a plurality of protrusions, are arranged on a surface 11A. .

  The plate member 11 is made of a resin having a substantially rectangular shape that is symmetrical in the vertical and horizontal directions in a plan view of about 20 cm × 6 cm and has a thickness of about 3 to 4 mm. Then, on the surface 11A of the plate member 11, a first protrusion 111a, a second protrusion 111b, and a third protrusion 111c, which are a plurality of protrusions having different heights in three stages according to the growth stage of algae, are provided. It arrange | positions in the mutually adjacent state, and is set as the structure which seaweeds, such as an unillustrated arame, swordfish, chrome, akamoku, hondawala, etc., are easy to settle around the projection parts 111a, 111b, 111c. It should be noted that seed threads (not shown) to which algae spores or zoospores such as larvae are attached can be hung around and attached to the plurality of protrusions 111a, 111b, and 111c.

  The first protrusion 111a is a raised portion that partially bulges the surface 11A of the plate member 11 so as to form a convex shape, and is formed integrally with the plate member 11. This 1st projection part 111a makes the height suitable for the growth stage before the root of algae grows. In addition, the 1st projection part 111a in this embodiment is about 0.5 mm in height from the surface 11A of the plate member 11, and the diameter is about 2 mm.

  Similar to the first protrusion 111a, the second protrusion 111b is a raised portion that partially bulges the surface 11A of the plate member 11 so as to form a convex shape, and is formed integrally with the plate member 11. This 2nd projection part 111b is formed higher than the 1st projection part 111a, and makes the height suitable for the growth stage from which the root of algae began to grow. In addition, the 2nd protrusion part 111b in this embodiment is about 3 mm in height from the surface 11A of the plate member 11, and the diameter is about 2 mm.

  The third protrusion 111c is a raised portion that partially bulges the surface 11A of the plate member 11 so as to form a convex shape, like the first protrusion 111a and the second protrusion 111b, and is integrated with the plate member 11. Is formed. The third protrusion 111c is formed higher than the second protrusion 111b, and has a height suitable for the growth stage in which the algal roots are extended. The third protrusion 111c in the present embodiment has a height from the surface 11A of the plate member 11 of about 1.5 cm and a diameter of about 1 cm.

  Further, an insertion hole 12 having a width of about 14 mm that penetrates in the thickness direction of the plate member 11 is provided at a substantially central position of the plate member 11. The insertion hole 12 is for connection with a main body connection portion 22 of the pedestal member 2 described later, and a specific connection method and the like will be described later.

  The plate member 11 includes a notch 13 that can be fixed by inserting a seed yarn (not shown). The notch 13 is formed by notching a part of the plate member 11 along the longitudinal direction from the opposite side ends of the plate member 11 toward the center.

  Further, an attachment path 14 formed of a plane on which the plurality of protrusions 111a, 111b, and 111c are not provided is provided near the center of the plate member 11. When the algae is intermediately grown using the algae-growing member body 1, the attachment path 14 is used by bringing a rope (not shown) into contact with the attachment path 14 and suspending it in the sea by various methods. Is done. In addition, the above-mentioned insertion hole 12 is utilized in order to attach the rope etc. which are not shown in figure, when the algae growth member main body 1 is suspended in the sea.

  The pedestal member 2 is disposed on an artificial reef formed of a rocky place on the seabed, concrete, or the like, and can hold the algal growth member main body 1 on the seabed B.

  As shown in FIGS. 1 to 5, the pedestal member 2 of the present embodiment includes a thin plate-like pedestal plate portion 21 and a main body connection that can be connected to the algae growth member main body 1 disposed on the surface 21 </ b> A of the pedestal plate portion 21. Spacer member that is disposed on the surface 22A of the pedestal plate part 21 and can form a gap g between the vicinity of the outer peripheral edge r of the plate member 11 of the algal growth member main body 1 and the pedestal plate part 21 of the pedestal member 2 S.

  The pedestal plate portion 21 is made of iron having a substantially rectangular shape with a plane area of about 23 cm × 10 cm that is wider than the plate member 11 of the algae growth member main body 1 and having a thickness of about 3 to 4 mm. is there.

  Here, the reason why the area of the pedestal plate portion 21 is larger than the area of the plate member 11 is that there is a gap between the vicinity of the outer peripheral edge r of the plate member 11 of the algae growth member body 1 and the pedestal plate portion 21 of the pedestal member 2. This is to ensure that g is formed and that the gap g is not affected by the undulations of the sea floor.

  The surface 21A of the pedestal plate portion 21 has a planar shape to which the main body connection portion 22 and the spacer member S can be attached by welding or the like, and the back surface 21B of the pedestal plate portion 21 is coated with an underwater adhesive or the like and is rocky on the seabed B. It has a flat surface suitable for attachment to artificial reefs made of concrete or concrete. Of course, there are various modes for attaching the pedestal plate portion 21 to the seabed B, and the method is not limited to those shown in the present embodiment.

  The main body connecting portion 22 includes a cylindrical bolt member 221 having a thread groove on the outer peripheral surface, and a fixture X that can be attached to the bolt member 221 so as to be able to be screwed back and forth. The bolt member 221 is attached perpendicularly to the position of the substantially central portion of the surface 21 </ b> A of the base plate portion 21. Moreover, the fixture X is a resin thing and can attach the algae growth member main body 1 so that attachment or detachment is possible. Here, when attaching the plate member 11 of the algae growth member body 1 to the pedestal member, the insertion hole 12 provided in the plate member 11 of the algae growth member body 1 was inserted into the bolt member 221 of the pedestal plate portion 21. Later, it is fixed by screwing with the fixture X.

  Thus, the pedestal member 2 includes a spacer member S that can form a gap g between the vicinity of the outer peripheral edge 111 of the plate member 11 of the algae growth member main body 1 and the pedestal plate portion 21 of the pedestal member 2. .

  The spacer member S is a hexagonal nut-shaped member having a width of about 15 mm to 20 mm made of iron or the like, and the algae breeding member main body 1 is stabilized in the vicinity of the bolt member 221 attached to the center portion of the pedestal plate portion 21. In consideration of the above, a plurality are arranged. The spacer member S is disposed closer to the center of the algae growth member body 1 than the vicinity of the outer peripheral edge r of the algae growth member body 1. Further, a predetermined gap g is formed between the outer peripheral edge r of the algal growth member main body 1 and the pedestal member 2 due to the height dimension of the spacer member S.

  As the spacer member S, any member may be used as long as the gap g can be formed in the vicinity of the outer peripheral edge r of the algal growth member main body 1. That is, various materials, shapes, and the like of the spacer member 23 can be employed.

  Here, the gap g is formed between the vicinity of the outer peripheral edge r of the algal breeding member main body 1 and the surface 21A of the pedestal plate portion 21 of the pedestal member 2, and the vegetative shellfish M and the like M are algae breeding members. A space that can make it difficult to move to the upper surface side of the main body 1.

  The gap g is set to a predetermined width (length in the height direction). For example, if the gap g is longer than the length in the height direction of the vegetative shellfish etc. M, the vegetation shellfish etc. M (especially shellfish may correspond) of the pedestal plate portion 21 of the pedestal member 2 The surface 21A is moved to scoop up the spacer member S, and the back surface 11B of the plate member 11 of the algae growth member body 1 is moved to reach the upper surface side of the plate member 11. On the other hand, if the gap g is too short compared to the size of the vegetative shellfish etc. M, the vegetative shellfish etc. M gets over the gap g from the pedestal plate portion 21 of the pedestal member 2, and the algae growth member main body 1 It will arrive at the upper surface side.

  That is, the gap g has a length shorter than the length in the height direction of the main vegetative shellfish and the like M in consideration of the sea area where the algae growth member P is installed. It is formed in a length in the height direction that makes it difficult to get on the upper surface side of 1.

  Specifically, the length of the gap g is set in the range of 1 cm to 8 cm in consideration of the size of shellfish such as Sazae, Koshida Kangara, Kubogai, etc., which are M, such as herbivorous shellfish. The

  In addition, when the algal roots (provisional roots) are elongated by the growth of algae, it is preferable that the length of the gap g is 3 cm or less in order to leave room for contact with the sea bottom.

  Therefore, the length of the gap g is more preferably set in the range of 1 cm to 3 cm.

  The place where the gap g is formed is the vicinity of the outer peripheral edge r of the algae growth part main body 1 (plate member 11). This is the place where the vegetation shellfish M or the like attempts to enter the surface 11A of the algae growth part main body 1. Is taken into account. Therefore, the outer peripheral edge r “near” is a predetermined area on the central side of the algal breeding member main body 1 from the outer peripheral edge r of the algal breeding main body 1. When the movement is restricted by the peripheral edge r, it refers to a predetermined area that can be touched by the vegetation shellfish and the like M.

  By the way, in this embodiment, although the spacer member S is demonstrated as a form attached to the base plate part 21 of the base member 2, the spacer member S is the vicinity of the outer periphery r of the algae growth member main body 1, and the base member 2. May be sufficient as long as it can form a gap g between them, and may be attached to the back surface 11B of the plate member 11 of the algae growth member main body 1 or may be independent that is not attached to any of them. That is, when the fixture X is used, the spacer member S is sandwiched between the plate member 11 and the base plate portion 21, so that the spacer member S can be fixed at a predetermined position.

  Next, a method for attaching the algal growth member main body 1 to the base member 2 will be described.

  First, the algae growth member main body 1 grows algae (not shown) on the algae growth member main body 1 to a certain size by various methods such as a hanging intermediate growth system (not shown). Thereafter, after the algae grows to a certain size, the algae breeding member main body 1 is moved and attached to the pedestal member 2 installed in advance at a required location on the seabed.

  And when attaching the plate member 11 of the algae growth member main body 1 to a pedestal member, after inserting the penetration hole 12 provided in the plate member 11 of the algae growth member main body 1 into the bolt member 221 of the pedestal plate part 21, Then, it is fixed by screwing with the fixture X. In the present embodiment, since the spacer member S is provided at a predetermined position of the pedestal plate portion 21, the length in the height direction of the spacer member S is approximately between the algal growth member main body 1 and the pedestal member 2. A gap g having the same length is formed.

  As described above, the algae growth member P according to the present embodiment has a relatively simple configuration that avoids the feeding damage of M, such as herbivorous shellfish that inhabit the sea floor, and is capable of growing algae. Can be provided.

<Modification>
6 and 7 show a modification of the algal growth member P. FIG. In addition, in the figure, suppose that the same code | symbol is attached | subjected about the member similar to the thing of the previous embodiment.

  As shown in FIG. 6, the algae growth member P is connected to the pedestal plate portion 22a of the pedestal member 2a having a substantially circular shape in plan view, and the algae growth member main body 1 and the algae SW to be settled on the algae growth member main body 1 are connected. It further comprises a side surface surrounding part 3 that surrounds the top surface in an open state.

  If it is provided with such a configuration, only M, such as herbivorous shellfish that live on the sea bottom, surround the algae growth member 1 and the algae SW entrapped on the algae growth member 1 with the side surface surrounding portion 3 open. In addition, the invasion of herbivorous fish (not shown) can be blocked. Moreover, in order to surround the algae growth member 1 and the algae SW sunk on the algal growth member 1 in a state in which the side surface surrounding portion 3 is open, the algae SW is covered with the algae SW as compared with the one that covers the top surface and prevents the invasion of the herbivorous fish. Necessary sunlight is not blocked, and the growth of the algae SW is not hindered.

  Here, “the state in which the upper surface is opened” is a state in which an opening 33 capable of sufficiently taking sunlight into the internal space formed by the side surface surrounding portion 3 is formed on the upper end side of the side surface surrounding portion 3. . The opening 33 may be wider than the mesh or hole formed in the side surface surrounding portion 3.

  By the way, since the side surface surrounding part 3 surrounds the algae growth member main body 1 and the algae SW sunk on the main body 1 with the upper surface opened, an opening 33 formed on the upper end side of the side surface surrounding part 3. It is feared that vegetative fish will invade and eat alga SW by putting themselves in the internal space of the side enclosure 3, but there is very little possibility of it being affected by the habits of vegetative fish.

  In other words, it has been found by investigation that the vegetative fish have left the algae growing in the depression in the sea area where the algae SW grows naturally, and the following reasons are considered.

  First, among the vegetative fish, those that cause damage from eating the algae SW in the algae bay are adult fish with a certain length (hereinafter referred to as “vegetated adult fish”), but the vegetative adult fish bites the algae SW. Since the cutting power is generally weak, in order to eat algae, it is necessary to move the body largely back and forth and to the left and right while holding the algae, and to tear off the algae SW. For this reason, it is considered difficult to eat the algae SW in a place where the movement area of the herbivorous fish is restricted.

  Next, it is difficult for the vegetative adult fish to always eat the algae SW while keeping its head down, so even if the upper end of the algae SW is eaten, the damage is extremely small. It is believed that there is.

  Therefore, if the width of the opening 33 of the side surface surrounding portion 3 and the width of the internal space of the side surface surrounding portion 3 can limit the movement area of the herbivorous adult fish, Even so, there is very little possibility that the algae SW can be eaten by the herbivorous adult fish.

  Considering that the body length of the vegetative fish represented by budai, aigo, etc. is about 40 cm to 45 cm, the width of the opening end of the opening 33 of the side enclosure 3 where the movement region of the vegetative fish is restricted. Is desirably 50 cm or less.

  Moreover, it is desirable that the left-right width of the internal space formed by the side surface surrounding portion 3 is 60 cm or less in consideration of the length of the herbivorous adult fish and the presence of algae that constantly swing in the internal space.

  The side surface surrounding portion 3 is formed by arranging a plurality of metallic frame members using round steel bars or the like in a mesh shape (lattice shape). The overall shape of the side surface surrounding portion 3 shown in FIG. It has a cylindrical shape with a space between the parts slightly outward. With such a shape, it is possible to avoid that the algae in the internal space come into contact with the side surface surrounding portion 3 and the side leaves and the like of the algae SW are damaged. In addition, since the side surface surrounding portion 3 is formed in a mesh shape, the inner space formed by the side surface surrounding portion 3 and the pedestal plate portion 22 is allowed to tide, and the algae growth member main body 1 and the illustration are attached to this. Can supply fresh seawater to algae that do not. Furthermore, when the metal frame member is formed, the service life in the sea is greatly increased compared to the case using a soft net, and the practicality is enhanced.

  More specifically, the side surface surrounding portion 3 includes a plurality of first frame members 31 that are arranged in a horizontal direction and formed in an annular shape in plan view, and are arranged in a height direction and slightly outward between an upper end portion and a lower end portion. A plurality of second frame members 32 formed by bending are provided. The dimensions of the plurality of meshes formed in the side surface surrounding portion 3 and having a substantially rectangular shape in front view are set to such a size that the herbivorous fish cannot pass through. Specifically, it is preferable that the interval between the first frame members 31 arranged in parallel (interval in the height direction) and the interval between the second frame members 32 (interval in the horizontal direction) are 5 cm or less. Note that the mesh size in this embodiment is about 5 cm × 5 cm. Of course, the size of the mesh may be appropriately adjusted according to the size of the herbivorous fish in the installation sea area. For example, if the mesh size is made smaller as it approaches the pedestal plate portion 22a, the invasion of herbivores such as sea urchins and snails can be inhibited. Further, the side surface surrounding portion 3 may be formed by forming a cylindrical bone frame using about three to four first frame members 31 and second frame members 32, respectively, and surrounding a net or the like on the side surface. .

  An opening 33 is formed at the upper end of the side surface surrounding portion 3. The size of the opening 33 is formed to a predetermined size that the adult herbivorous fish dislikes. Specifically, it is desirable that the width of the opening end of the opening 13 is 50 cm or less. This is because the body length of the vegetative fish represented by budai, aigo and the like is about 40 cm to 45 cm, and the movement area required for the vegetative fish to eat algae is taken into consideration. In addition, since the width of the opening end of the opening 33 is 35 cm or more, the algae growth member main body 1 can be installed inside the side surface surrounding portion 3 in a state where the algae growth member main body 1 is held with both hands. Is preferred. Therefore, the width of the opening end of the opening 33 is preferably 30 cm to 40 cm, more preferably about 35 cm.

  Moreover, the dimension of the height direction of the side surface surrounding part 3 has a suitable thing of 50 cm-70 cm, More preferably, it is a thing of about 60 cm. This takes into account the convenience of human work to bring the algae growth member body 1 into the hand and carry it through the opening 33.

  Although the basic configuration of what is shown in FIG. 7 is the same as that shown in FIG. 6, only the shapes of the base plate portion 22b and the side surface surrounding portion 3b of the base member 2b are different.

  That is, in FIG. 7, the pedestal plate portion 22b has a substantially rectangular shape in plan view, the side surface surrounding portion 3b forms the opening 13b in a substantially rectangular shape in plan view, and the overall shape is a substantially rectangular tube shape. It is formed. In addition, since the configuration, operational effects, and the like of the embodiment illustrated in FIG. 7 are the same as those described with reference to FIG.

  The present invention is not limited to the embodiment described in detail above.

  For example, the algae growth member main body is not limited to the one shown in the present embodiment as long as the algae growth member main body can be cultivated and activated. For example, the shape of the algal growth member main body may be a circular shape in plan view or a polygonal shape. Further, the length in the thickness direction of the algal growth member main body is not limited to that shown in the present embodiment, and can be of various thicknesses.

  In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

The perspective view which shows the algae growth member which is embodiment of this invention. The perspective view which shows the algae growth member which is embodiment of this invention. The AA sectional view of the algal growth member which is an embodiment of the present invention. The front view which shows the base member which is embodiment of this invention. The top view which shows the base member which is embodiment of this invention. The perspective view which shows the algae growth member which is a modification of this invention. The perspective view which shows the algae growth member which is a modification of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Algae growth member main body 2 ... Base member P ... Algae growth member g ... Crevice r ... Outer periphery

Claims (2)

An algae growth member comprising an algae growth member main body capable of growing and establishing algae, and a pedestal member capable of holding the algae growth member main body on the seabed,
All SANYO obtained by forming a gap between the outer periphery near said base member of said algae proliferation member body,
The gap is formed by interposing a spacer member between the algal growth member main body and the pedestal member,
The algae growth member main body comprises a thin plate-like plate member formed by arranging a plurality of protrusions on the surface,
The pedestal member comprises a thin plate-like pedestal plate portion that can be attached to the sea bottom, and a main body connection portion that is disposed on the pedestal plate portion and can be connected to the algae growth member main body. And
The gap may be shorter than the length in the height direction of the vegetative shellfish that attempts to enter the surface of the algae growth member main body, and the vegetation shellfish may ride on the upper surface side of the algae growth member main body. it is difficult length is set within a range of 1 to 3 cm, the outer peripheral edge of the algal growth member body, algae growth member, wherein Rukoto been moved limitations of the plant food shellfish.   The algal growth member according to claim 1, wherein an area of the pedestal plate portion is larger than an area of the plate member.

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