JP7493205B2 - Oyster Growing Machine - Google Patents

Description

The present invention relates to an oyster hatcher.

One of the well-known methods for cultivating oysters is single-seed farming, in which a cage housing multiple oyster juveniles is suspended in the sea, or a support line to which the tops of the shells of oysters that have grown to a certain extent are fixed is suspended in the sea (the so-called ear-hanging method), in order to cultivate oysters individually.

In single-seed farming, where oysters are fixed to the support line, young oysters that have grown to a certain size are glued by being embedded in a specified amount of underwater cement placed on a rope body, and the young oysters that are embedded and fixed in the underwater cement are then suspended into the sea for farming. The oyster farming device and method described in Patent Document 1 are conventionally known.

According to Patent Document 1, the oysters can be fixed to the support string so that the growth direction of the oysters does not interfere with the adjacent oysters, which allows oysters with well-formed shells to grow larger. However, after the oysters are attached to the underwater cement on the rope body side, they are exposed in the sea, which creates an issue of vulnerability to damage by fish.

In addition, an oyster cultivator as described in Patent Document 2 is known in the prior art, which uses a conventional single seed method and is configured to control the shape of the oyster shells to be heart-shaped after they have grown by providing a V-shaped molding device at the top of the oysters' heads.

According to Patent Document 2, while it is possible to control the shape of one end of the oyster shell after it has grown, there is a problem in that it is difficult to adjust or make uniform the overall shape, shell thickness, and shell width of the oyster shell.

JP 2014-18099 A Patent No. 5755457

To provide an oyster cultivating device capable of efficiently preventing damage to young oysters from being eaten and cultivating large oysters with a neat and regular overall shape by controlling the shape of shells to a certain degree when cultivating the oysters from young oysters to a state suitable for shipping.

In order to solve the above problems, the present invention is characterized in that it has a fixing body formed from a bendable and deformable sheet body made of a synthetic resin, with a fixing surface formed on its inner surface for fixing oyster juveniles, the fixing body having a base end, one end of the sheet body, bent to close to form a pair of left and right upright portions, a fixing portion being provided on the base end side of the sheet body to maintain the bent shape of the closed sheet body, the other side of the sheet body being a wide open portion, the sheet body having a storage portion that covers the outer periphery on both the left and right sides of the juvenile oysters that have been fixed on the inner surface of the upright portion, and a structure that guides the growth direction and shape of the juvenile oysters that have been fixed on the fixing surface so that they grow toward the open portion .

Secondly, the fixing surface is characterized by being formed so that it becomes wider toward the open side when viewed in a plane.

Thirdly, the fixing body is characterized in that it is formed of a flexibly deformable synthetic resin sheet .

Fourthly, the sheet body is characterized in that it is made of a material with a smooth surface.

Fifthly, the sheet body is characterized in that it is formed in a dimpled or mesh shape, thereby forming unevenness on the surface.

Sixthly, the sheet body is characterized in that a pair of fixing holes are formed on the edge side of the sheet body as fixing parts for fixing the edges of the sheet body to each other.

Seventh, the fixing body is characterized in that the young shellfish are fixed to the fixing body using an adhesive.

Eighth, the device is characterized in that it is provided with a support body for supporting the fixing body subsea, the support body being a rope body for supporting and suspending a plurality of the fixing bodies subsea, and by attaching and fixing a plurality of the fixing bodies along the rope body, the fixing bodies are configured to be supported and suspended subsea.

Ninthly, the system is characterized in that it includes a support that supports the fixed bodies in the sea, the support being a cage that can house a plurality of the fixed bodies and that is configured to be supported by being suspended in the sea while the fixed bodies are housed therein.

The fixing body uses a three-dimensional storage section with one end open to store a single young oyster, which allows the young oyster to be covered by the storage section, especially in the early stages of growth, reducing damage caused by fish. In addition, the storage section can control the direction in which the young oysters grow and prevent them from interfering with neighboring oysters, allowing the young oysters to grow into large, well-formed oysters, and by adjusting the shape of the storage section, the shape of the oysters after they have grown can be controlled to some extent.

In addition, if the fixing surface is formed so that it becomes wider toward the open side when viewed from above, the oysters fixed in the storage section can grow large and beautiful toward the open side.

Furthermore, if the fixing body is formed from a flexibly deformable synthetic resin sheet , the fixing body can be reused, and therefore the cost of the fixing body can be reduced.

In addition, if the sheet body is made of a material with a smooth surface, any attached matter other than oysters can be easily removed.

The sheet body is also formed in a dimpled or mesh shape, so that the surface is uneven, making it easier for young oysters to settle on the settlement surface.

Furthermore, if the sheet body has a pair of fixing holes formed on the edge side of the sheet body as fixing portions for fixing the edges of the sheet body to each other, a storage portion can be formed in the fixing portion with a simple configuration.

In addition, if the fixing body is one in which the young oysters are fixed using an adhesive, the task of fixing the young oysters to the fixing body can be carried out smoothly.

In addition, the device is equipped with a support that supports the fixed bodies in the sea, and the fixed bodies have mounting holes formed on the support side for mounting, and the support has a rope body that supports and suspends multiple fixed bodies in the sea. By attaching and fixing multiple fixed bodies along the rope body, the fixed bodies can be supported and suspended in the sea (ear-hanging type), and multiple fixed bodies with juvenile oysters attached can be efficiently supported and suspended in the sea.

In addition, if a support is provided to support the fixed bodies in the sea, the support being a cage capable of housing a number of the fixed bodies and configured to be suspended and supported in the sea while the fixed bodies are housed therein, it is possible to prevent damage to the baby oysters placed on the fixed bodies during the early stages of their development.

FIG. 1 is a perspective view of the main parts of an oyster cultivator to which the present invention is applied. 1A is a development view of the fixing body, and FIG. 1B is a front view of the fixing body. FIG. FIG. 13 is a diagram showing an example of use of the support cage. FIG. 1 is a flow diagram showing a method for cultivating oysters. Photographs showing the growth process of rock oysters at each step in the example. 1 is a photograph showing rock oysters grown to a size suitable for shipping in an embodiment. (A) is a photograph showing rock oysters grown in the test area after being removed from their anchorages, and (B) is a photograph showing rock oysters grown in the control area after being removed from their oyster and scallop shells. (A) is a comparative graph of shell height between the test and control groups of rock oysters in the example, (B) is a comparative graph of shell weight, and (C) is a comparative graph of soft body weight.

Figure 1 is a perspective view of the main parts of an oyster cultivator to which the present invention is applied, Figure 2 (A) is an exploded view of the fixing body, and Figure 2 (B) is a front view of the fixing body. The oyster cultivator shown in the figure is equipped with a fixing body 1 having a three-dimensional storage section 3 for settling oysters, and supports 2, 16 for suspending and supporting multiple fixing bodies 1 in the sea.

The support comprises a resin support thread 2 formed in a string-like (rope-like, thread-like) shape to which multiple fixed bodies 1 are attached and fixed, and a support cage (cage body) 16 that is suspended and supported in the sea while housing multiple fixed bodies 1. The support thread 2 is configured so that one end of the support thread 2 can be fixed to a raft or the like to suspend and support the fixed body 1 on which the juvenile oysters in the later stages of growth are fixed in the sea, and the support cage 16 is configured to house juvenile oysters in the early stages of growth so that they can be prevented from being eaten. The support (support thread 2 and support cage 16) will be described later.

The fixing body 1 is formed of a flexibly deformable rectangular sheet body, and includes a fixing part 4 that holds (maintains) the shape of the deformed sheet body, the storage part 3 in which oyster juveniles (hereinafter simply referred to as juveniles) are fixed and which covers the outer periphery of the fixed juveniles, and an attachment hole 6 for attaching the fixing body 1 to the support thread 2 side. (See Figures 1 and 2 (B)).

The sheet body is a flexibly deformable synthetic resin member, and in the illustrated example, a polypropylene (PP) resin member with a length of 8 cm, width of 9 cm, and thickness of 1 mm is used as the rectangular sheet body (see FIG. 2(A)). The length and ratio of the length and width of the sheet body may be changed depending on the shape and size of the desired oyster shells. The thickness may also be changed overall or partially depending on the required strength.

Since the sheet body is made of a flexible and durable resin material, after the grown oysters are removed from the fixing body 1, the attached barnacles and other attachments can be smoothly and easily removed by bending and deforming the sheet body. This makes the fixing body 1 economical as it can be used repeatedly.

The sheet body may be formed entirely of a smooth surface as shown in the figure, or may be formed as a dimpled body (not shown) with uneven protrusions arranged on the surface, or as a mesh body (not shown) with transparent sections to enhance the adhesive strength of the oysters. The sheet body may also be configured with multiple types of surfaces, with the smooth surface, dimpled surface, and mesh surface being partially different.

The storage section 3 is the inner peripheral side of the fixing body 1 formed by the sheet body, and has a fixing surface 11 for fixing the oyster larvae, a pair of raised portions 12, 12 formed by bending the sheet body so as to cover (close) one (base end) side of the fixing surface 11, and an open portion 13 formed by opening the other (open) side of the fixing surface 11, and the fixing surface 11 is formed so as to become wider toward the open side (see Figure 2 (B)).

The storage section 3 is also configured so that the young oysters to be grown can be attached to the young oyster settling position S provided on the base end side of the settling surface 11 using an adhesive such as silicone. The storage section 3 can guide (induce) the growth direction of the young oysters that have been settling on the settling surface 11 so that they grow towards the open section 13. Furthermore, even after the young oysters protrude from the edge of the open section 13, they can continue to grow while maintaining their growth direction and shape to a certain extent.

Therefore, by designing the shape of the fixing body 1 to match the desired shape, it is possible to induce and cultivate the oysters into a shape that meets product needs at the time of shipment. If the storage section 3 is adjusted to be deep, the oysters can be induced to have a thick shell, or a deep cup shape, which makes it easier to cultivate oysters with a heavier soft body and higher commercial value.

The fixing part 4 is composed of a pair of rectangular fixing holes 4A, 4A formed on both the left and right ends of one side (horizontal side) of the sheet body, and a band-shaped fixing member (fixing part, connecting device) 4B made of a cable tie (insulok tie) or the like that can be inserted into the fixing holes 4A (see Figures 1 and 2, etc.), and is configured so that the sheet body can be bent and formed into the fixing body 1 and then fixed with a fastener 5.

The fixing portion 4 may be any combination that can fix the sheet body in the molded state on the fixing body 1, and is not limited to a combination of a fixing hole 4A on the sheet body side and a fixing member 4B inserted into the fixing hole.

The method of forming the fixing body 1 in this embodiment is specifically described below. In this embodiment, the sheet body is manually bent to form a three-dimensional shape, and then temporarily fixed with the fixing part 4. After that, the sheet body is immersed in hot water of about 80°C or higher for several seconds to soften the resin and set the shape to the desired shape, and then the sheet body is immersed again in room temperature water such as tap water to harden it and fix the shape.

In this embodiment, the fixing body 1 was formed manually using the above procedure, but when using this invention for aquaculture, it is more labor-saving and practical to prepare a mold in advance that matches the shape of the desired fixing body 1, and to configure the fixing body 1 so that it can be mechanically formed in large quantities.

Incidentally, the mold may be configured to print any pattern, letter, logo, illustration, etc., in reverse on the surface of the sheet body when forming the fixing body 1. With this configuration, it is possible to make specific letters, logos, illustrations, etc. stand out on the surface of the oysters cultivated using the fixing body 1.

The attachment hole 6 is a hole through which the support thread 2 can be inserted, and is formed in the fixing surface 11 constituting the storage section 3. More specifically, it is configured to be positioned on the base end (standing portion) side of the baby oyster fixing position S where the baby oysters are fixed (glued) on the fixing surface (see FIG. 2(B)). In other words, it is configured so that the base end side of the fixing body 1 can be attached to the support thread 2 side by inserting the support thread 2 through the attachment hole 6.

In addition, instead of the mounting hole 6, the above-mentioned fixing body 1 may be configured to have a pair of front and rear flaps 15, 15 integrally molded on the base end side and the open portion 13 side of the storage section 3, and mounting holes 10 formed in each flap 15, making it possible to attach the fixing body 1 to the support thread 2 side at multiple points (see Figure 2, etc.).

The above-mentioned fixing body 1 may also have rounded corners 14 at both ends of the open section 13 side by forming a radius at the corners (corners) of the sheet body (see FIG. 2(A)). With this configuration, the shape of the oysters that grow using the fixing body 1 is improved.

Furthermore, the above-mentioned fixing body 1 may be configured so that auxiliary protrusions 8 for reducing damage from fish are provided on the peripheral side of the storage section 3 (sheet body 1) in a portion that does not interfere with the growth of the baby oysters, or auxiliary protrusions 9 for maintaining the shape of the baby oysters in good condition after they protrude from the opening 13 and grow (see Figure 2, etc.).

The support thread 2 is formed in a string-like shape that can be inserted into the mounting hole 6, and is configured so that it can be inserted into the mounting hole 6 and fix (bind) the fixing body 1 at predetermined mounting positions provided at predetermined intervals. Specifically, string-shaped nylon fishing line, insulation lock ties, etc. are used as the support thread 2.

With this configuration, since both the fixing body 1 and the support thread (nylon line) 2 are made of resin materials, it is possible to efficiently prevent a situation in which they rub against each other and wear out due to up and down movement in the sea during cultivation, causing the support thread 2 to break and the fixing body 1 to fall into the sea.

Furthermore, with this configuration, multiple fixing bodies 1 can be suspended and supported with the open side of the storage section 3 facing the outside (bottom) side of the support thread 2 so that the growing direction of the oysters does not interfere with the rope body, which has one end of the support thread 2 connected to a raft or main line on the sea surface, and the young oysters fixed to the fixing body 1 can be efficiently grown (cultured).

Next, the support cage 16 will be described with reference to Figure 3. Figures 3 (A) and (B) are photographs showing the state before and after cultivation using the support cage.

The support cage (hanging cage) 16 is formed in a cylindrical shape so that multiple fixing bodies 1 can be stored inside, and multiple partition sections 17 are formed along the vertical direction, forming multiple cylindrical storage sections 18 for storing multiple fixing bodies 1 along the vertical direction (see Figure 3).

According to this configuration, the support cage 16 is surrounded by a net, which can prevent damage (eating damage) caused by fish and other creatures eating the young oysters that have been attached to the fixing body 1. In this case, even if the fixing body 1 with the young oysters temporarily attached is randomly dropped in, the support cage 16 can prevent eating damage and keep the shape of the growing young oysters neat, as long as the young oysters are within a size range that can be contained within the storage section 3.

At this time, the mesh size of the support cage 16 can be increased to match the size of the fixed body 1, so the net will not become clogged in the sea during cultivation, eliminating the need for maintenance work such as cleaning and cage replacement.

According to the above-mentioned configuration of the support (support thread 2 and support cage 16), when the young oysters attached to the fixing body 1 are small and susceptible to predation, the fixing body 1 can be stored in the support cage 16 and grown (early cultivation process), and when the young oysters have grown to a certain extent and are less susceptible to predation by fish, the fixing body 1 can be attached to the support thread 2 and grown (late cultivation process). Note that if the sea area in which oysters are cultivated using the oyster cultivation device of the present application is one in which there is no predation by fish, it is also possible to use a configuration in which the support thread 2 is used from the beginning to cultivate oysters in an ear-hanging style without using the support cage 16.

Next, another embodiment of the support cage will be described with reference to Figure 4. Figure 4(A) is a photograph showing another embodiment 1 of the support cage, and Figure 4(B) is a photograph showing another embodiment 2 of the support cage.

As shown in FIG. 4(A), the support cage 16 may be configured such that the base end of the fixing body 1 is suspended from a rod-shaped support member, arranged in a curtain-like manner, and the support member 19 with the fixing body 1 suspended and supported thereon is stored (set) within the support cage 16.

According to this configuration, all of the fixed bodies 1 suspended from the support member 19 are supported with the open side of the storage section 3 facing downwards, so that the young oysters fixed to the fixed body 1 can be grown neatly in the direction of gravity along the inner circumferential surface of the storage section 3 without interfering with adjacent fixed bodies 1. In other words, when growing young oysters while preventing them from being eaten using the support cage 16, even if the young oysters are grown to a size that protrudes from the storage section 3, the young oysters can be grown neatly without interfering with other fixed bodies 1, etc.

In addition, when the support member 19 is used, the support cage 16 may be configured to surround the periphery of the support cage 16 in a spiral shape using a pest control member 20 such as a hard wire made of elastic resin, instead of a net covering the periphery, as shown in Figure 4 (B).

With this configuration, the openings of the net are wider, which further increases the fluidity of seawater into the support cages 16, making it easier to replenish the phytoplankton that feeds on the oysters, allowing them to grow better while preventing damage to the oysters from fish to some extent.

Next, the steps of the oyster cultivation method will be described with reference to Figures 5 to 7. Figure 5 is a flow diagram showing the oyster cultivation method. Figure 6 is a photograph showing the growth process of rock oysters at each step in the embodiment, and Figure 7 is a photograph showing rock oysters cultivated to a size suitable for shipping in the embodiment. The oyster cultivation method of the present invention comprises a preparation step S1 for preparing oysters, a fixing step S2 for fixing the oysters to the fixing body 1, cultivation steps S3 and S4 for cultivating the oysters fixed to the fixing body 1, and a shipping step S5 for shipping the cultivated oysters.

In the preparation step S1, oysters are obtained to be fixed to the fixing body 1 in the fixing step described later. The origin of the seedlings may be natural or artificial, but the seeds used are so-called single seeds that are individually separated. To be more specific, in natural seedling collection, a resin seedling collector that allows easy peeling of the seedlings is lowered into the natural sea during the oyster spawning season, and the seedlings are collected by attaching them to the seedling collector. In artificial seedling collection, seedlings are collected in a water tank on land by a method using the above-mentioned resin seedling collector or a so-called cultless method that does not use a seedling collector. In this embodiment, seedlings derived from natural seedling collection were used, and the seedling collector was lowered into the sea in October , and seedlings with an average shell height of 2 cm attached to the seedling collector were collected the following February.

In the fixation process S2, the young oysters obtained by various methods are attached to the fixation surface 11 at the oyster fixation position S using adhesive, so that the young oysters are temporarily fixed in the storage section 3 of the fixation body 1 (see FIG. 6 (A)). In this example, the fixation work was carried out at the same time (in February) as the young oysters attached to the seedling collector were harvested.

In this embodiment, a silicone-based filler was used as the adhesive for temporarily attaching the baby oysters to the fixing body 1, but any adhesive with low toxicity that does not affect the growth and survival of the baby oysters, is easy to work with, and has a strong adhesive strength that allows the baby oysters to be temporarily attached in a short period of time, within half a day to a day, and is in a gel form.

Here, by using a silicone filler as the adhesive, it is possible to temporarily attach the baby oysters to the fixing body 1 at low cost and with good workability, and in the process of removing the oysters from the fixing body 1 during the shipping process, the silicone filler adheres more strongly to the fixing body 1 than the shells, so no silicone filler remains on the oyster shells after removal, which is a major benefit as it eliminates the need to remove the adhesive from the shells.

The cultivation process includes an early cultivation process S3 in which the fixing body 1 is supported in the sea using the support cage 16, and a later cultivation process S4 in which the fixing body 1 is suspended and supported in the sea using the support thread 2.

In the early-stage cultivation process S3, the fixing body 1 to which the juvenile oysters have been provisionally attached in the fixing process is stored in the support cage 16, and the support cage 16 containing the fixing body 1 is suspended in the sea for cultivation. At this time, a cultivation period of about one month is required until the edges of the juvenile oysters grow and they are firmly attached to the fixing body 1. Furthermore, the cultivation period may be extended to prevent damage from predatory organisms such as fish. In this embodiment, the early-stage cultivation process was started in February (Figure 6 (A)), and cultivation was completed in May (Figure 6 (B)) when the juvenile oysters had grown to the point where they reached the vicinity of the open side of the storage section 3.

In the latter stage of cultivation S4, the fixing bodies 1 stored in the support cage 16 are removed, and the fixing bodies 1 are attached to the support thread 2 at predetermined intervals and suspended in the sea, whereby the juvenile oysters are cultivated until they grow into shippable oysters. In this example, the latter stage of cultivation began in May, and the oysters were cultivated by being suspended on the support thread 2 (by the ears) for approximately two years until they reached a shippable size. Figure 6 (C) is a photograph of rock oysters one year and two months after the latter stage of cultivation began.

In the shipping process S5, oysters that have grown to a size suitable for shipping are removed from the fixing body 1, and the oysters removed from each fixing body 1 are cleaned. The cleaned oysters are shipped after undergoing necessary processing depending on the application. Figure 7 is a photograph showing uncleaned rock oysters just before shipping in this embodiment.

Here, the fixing body 1 and the oysters are firmly fixed together, making it difficult to peel the oysters off as is; however, by removing the cable ties that fix the shape of the fixing body 1 and bending and deforming the sheet body that constitutes the fixing body 1, the grown oysters can be smoothly removed from the fixing body 1 (sheet body).
[Verification test]

In this example, we will explain the details of the tests that were conducted to confirm the effectiveness of the oyster cultivation method using the oyster cultivation device of the present invention.

In the test area based on the present invention, oyster juveniles were obtained by natural seeding from a seedling collector suspended in the sea in October 2018, and were grown in an oyster culture device in the sea between February 2019 and June 2021 until the oysters reached a size suitable for shipping.

In contrast, in the control area for comparison, oyster juveniles, which were naturally collected in October 2018, like those in the test area, were attached to scallop shells in the same manner as in the conventional method and grown in the ocean until June 2021. Below, we will compare the condition of oysters grown in the test area and the control area based on Figures 8 and 9.

Figure 8 (A) is an example of a photograph showing oysters grown in the test area after being removed from their anchorages in June 2021, and Figure 8 (B) is an example of a photograph showing oysters grown in the control area during the same period after being removed from their scallop shells.

As shown in Figure 8, most of the oysters obtained from the test plots based on the present invention grow along the inner circumferential surface of the storage section 3 toward the open section 13, so there is little deformation of the shells and it can be confirmed that the shell shapes are almost uniform (see Figure 8 (A)).

On the other hand, it was found that the growth of oysters collected from the target area was inhibited by mutual interference between adjacent oysters on the scallop shells of the seedling collector, and the shell shapes were uneven (see Figure 8 (B)). In addition, some oysters were found to have part of their shells chipped off during the separation process due to adjacent oysters sticking together (the area indicated by the arrow in Figure 8 (B)).

Figures 9 (A) to (C) show a comparison of the average shell height, average shell weight, and average soft body weight in the test and control plots. As shown in the figures, it was confirmed that the oysters obtained from the test plot based on the present invention had a shell height that was approximately 1.2 times that of the oysters obtained from the control plot, a shell weight that was approximately 1.6 times that of the oysters obtained from the control plot, and the weight of the soft body inside the oyster was also approximately 1.6 times that of the oysters obtained from the control plot.

Based on the above, it has been confirmed that by using the oyster cultivating device and oyster cultivating method of the present invention, the shape of the cultivated oysters is better and more uniform, and the growth of the resulting oysters is more promoted and better, compared to conventional methods.

1 Fixing body 2 Support thread (support body, rope body)
3 Storage section 4A Fixing hole (fixing section)
4B Cable tie (fixing part, connecting tool)
6 Mounting hole 16 Support cage (support body, cage body)

Claims (9)

The fixing body is formed of a bendable synthetic resin sheet body, and has a fixing surface formed on the inner circumferential surface for fixing oyster juveniles,
The fixing body is formed by bending one end of the sheet body, the base end side, so as to close, into a pair of left and right standing parts, and a fixing part that maintains the bent shape of the closed sheet body is provided on the base end side of the sheet body, and the other side of the sheet body is formed into a wide open part, and the inner surface of the upright part has a storage part that covers the outer periphery on both the left and right sides of the baby oysters that have been fixed , and the structure is such that the growth direction and shape of the baby oysters that have been fixed on the fixing surface are guided so that they grow toward the open part.
Oyster breeding equipment. The oyster culturing apparatus according to claim 1 , wherein the fixing surface is formed so as to become wider towards the open side in a plan view. The oyster cultivator according to claim 1 or 2, wherein the fixing body is formed of a flexibly deformable sheet body made of synthetic resin. An oyster cultivating device according to any one of claims 1 to 3 , wherein the sheet body is formed from a material having a smooth surface. The oyster culturing device according to any one of claims 1 to 3 , wherein the sheet body is formed in a dimpled or meshed shape, thereby forming projections and recesses on the surface. 6. An oyster cultivator according to claim 1, wherein the sheet body has a pair of fixing holes formed on the edge side of the sheet body as fixing parts for fixing the edges of the sheet body together . The oyster cultivator according to any one of claims 1 to 6, wherein the fixing body is used to fix the baby oysters with an adhesive. A support is provided to support the anchor in the sea,
An oyster culture device as described in any one of claims 1 to 7, wherein the support body is a rope body that supports and suspends multiple fixing bodies in the sea, and the fixing bodies are attached and fixed in multiple parts along the rope body, thereby enabling the fixing bodies to be supported and suspended in the sea. A support is provided to support the anchor in the sea,
An oyster cultivator as described in any one of claims 1 to 7, wherein the support body is a cage body capable of accommodating a plurality of the fixing bodies, and is configured so as to be capable of being suspended and supported in the sea with the fixing bodies accommodated therein.

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