JP2017169452A - Fish preserve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fish preserve in which fishes are hard to collide or be caught, and damage can be suppressed even in collision.SOLUTION: A fish preserve 1 disposed in the ocean is provided in which a main body part 11 enclosing swimming fishes is constituted of a side wall 12 and a bottom 13. The cylindrical side wall 12 and the circular bottom 13 are formed of a sheet being flexible and having non-water permeability. Aquaculture water is filled in the main body part 11, and thereby the side wall 12 and the bottom 13 are brought into the condition being stretched. Also, a pump 17 for supplying the aquaculture water is connected to the side wall 12 of the main body part 11 through a water inlet 16 in the main body part 11. The aquaculture water is supplied by the pump 17, and thereby a constant internal pressure is given to the main body part 11. Consequently, a constant shape can be maintained even if the main body part 11 is formed of a flexible sheet. Also, the main body part 11 is made of the flexible sheet, so that the shock is absorbed by the main body part 11 even if the fishes collide, and therefore the damage of the fishes can be minimized.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a ginger for culturing fish in the ocean, lakes, rivers and the like.

For example, when fish is cultivated in the ocean, a ginger that divides the ocean is used. Ginger may be formed by a net.
For example, the ginger described in Patent Document 1 is one in which an inner net body made of synthetic fiber is housed in a metal outer net body. According to this ginger, the rigidity of the metal rigid outer mesh supports the flexible inner mesh, the inner mesh does not deform due to the influence of ocean currents, etc. The inner net body made of steel is accommodated, and there is a gap between the outer net body and the inner net body, so there is no collision with the metal net, and the fish are damaged or drowned. It is said that there is no.

Moreover, what was described in patent document 2 is known as what formed the ginger with the sheet | seat.
An underwater organism training device described in Patent Document 2 includes a buoyancy frame body made of a rigid material having buoyancy, a cylindrical isolation sheet suspended from the frame body in water, and the form of the sheet is maintained in water And an underwater frame made of a rigid material, and the separator sheet is impermeable to water or has water permeability, but passes sludge, protozoa, flagellate algae and diatoms. It has a function that does not.

Japanese Patent Laying-Open No. 2015-173627 Japanese Patent Laid-Open No. 7-8139

  The ginger described in Patent Document 1 is considered to reduce stress on fish due to deformation of the inner net because the inner net is not affected by ocean currents. However, in the ginger described in Patent Document 1, a flexible synthetic fiber inner net may not cause the fish to be damaged or moribund even if the fish collides with the inner net. There is a possibility that the mouth gets caught in the inner net and so-called mouth cracking occurs.

  The underwater organism breeding apparatus described in Patent Document 2 uses an isolation sheet instead of a net, and the mouth does not get caught on the isolation sheet. However, in the underwater organism breeding apparatus described in Patent Document 2, since the isolation sheet is held in water by the underwater frame made of a rigid material, the isolation sheet is stretched with a certain strength by the underwater frame. In particular, since a particularly strong tension is generated in a portion close to the position fixed by the underwater frame, it is assumed that damage will be increased if a fish collides therewith.

  Accordingly, the ginger is required to be able to suppress damage even if the fish is difficult to collide or get caught.

  Therefore, an object of the present invention is to provide a ginger that is less likely to collide or get caught by fish and that can suppress damage even when the collision occurs.

  The ginger of the present invention is characterized in that a main body part surrounding a swimming fish is composed of a side wall part and a bottom part, at least the side wall part is made of a sheet, and is provided with tension adjusting means for adjusting the tension of the sheet. .

  According to the ginger of the present invention, since the tension adjusting means is provided, even if the shape of the ginger cannot be maintained unless the aquaculture water is stored, the shape of the side wall portion can be changed by making the sheet stretched. A constant shape can be maintained. Therefore, deformation of the side wall due to waves or winds can be suppressed, and fish collisions due to sudden deformation can be avoided. Even if the fish collides with the side wall, the side wall is formed of a sheet and does not use a frame for retaining the shape. Therefore, the impact can be absorbed by the sheet. Here, the aquaculture water is water that can be used to grow fish to be cultivated, and is water around the place where the ginger of the present invention is installed, or salt water if it is saltwater fish, and salt water if it is freshwater fish. Or water.

As fish to be cultured, for example, yellowtails, yellowtails exemplified by yellowtails, yellowtails, whitetails, whitetails, redfishes, redfishes, bluefin tuna, Atlantic bluefin tuna, Southern Bluefin Tuna, Yellowfin, Bigeye, Binaga, Cosynaga, Atlantic Bluefin Tuna, Skipjack, Satsuma, Hirasoda, Marsoda Tuna, Mackerel, Mackerel, Mackerel, Staghorn, Staghorn Examples include salmons such as salamander, salmon, salmon salmon exemplified by trout, flounder, flounder, and flounder exemplified by Ushinosita.
The mackerel fish are included as aquaculture objects. The mackerel family fish is a fish classified into the periwinkle mackerel family. The mackerel family includes the Hagatsuo, Sawala, Saba and Tuna. The Stag beetle includes the genus Isoma and Satsuma, the Sawara is the genus Kasusawara, Nijosaba and Sawara, the Saba is Gurkuma and Saba, and the Includes genera, bonito genus, and tuna genus. The genus is a bluefin tuna, a bonito is a genus, an eel moth is a moth, a moth is a moth, a moth is a mackerel, a sesame is a mackerel, a sesame is a moth, Suma, Bonito in the genus Bonito, and Bluefin tuna, Atlantic bluefin tuna, Southern bluefin tuna, Yellowfin, Bigeye, Binaga, Cocinaga, Atlantic bluefin tuna in the genus Tuna. Among the mackerel family fish, small fish such as tuna larvae, fry, and juveniles are vulnerable to stress and are one of the objects of the present invention.

  The sheet can be a soft sheet. Here, the soft sheet indicates that the shape cannot be maintained by its own weight unless the culture water is filled, and even when fish collide in the water, the impact is absorbed by deformation.

  The sheet may be non-permeable. If the sheet is water-impermeable, even if an internal pressure is applied to the sheet and the tension of the sheet is adjusted, the culture water does not permeate, so the internal pressure can be suppressed.

  The tension adjusting unit may be an internal pressure adjusting unit that adjusts an internal pressure with the aquaculture water of the main body, or a length adjusting unit that adjusts the length of the side wall in the depth direction. The internal pressure adjusting means adjusts the internal pressure with the aquaculture water of the main body, so that the internal pressure can be in a state where the side wall is stretched, so that the internal pressure adjusting means can function as a tension adjusting means. Further, the length adjusting means adjusts the length of the side wall part in the depth direction, so that the side wall part can be stretched by its own weight, so that the length adjusting means is used as the tension adjusting means. Can function.

  The internal pressure adjusting means may adjust the internal pressure based on the amount of culture water supplied to the main body and the amount of culture water discharged from the main body. Increasing the amount of cultured water supplied to the main unit from the amount of drainage discharged from the main unit increases the tension of the main unit, and maintaining the same amount of supply and drainage can maintain the tension of the main unit. If the supply amount of the aquaculture water to the part is less than the amount of drainage discharged from the main part, the tension of the main part can be weakened.

  The internal pressure adjusting means has a water supply port for discharging the culture water to the main body, and the water supply port can be oriented along the inner side surface of the side wall. By doing so, since the water flow along the inner surface of the side wall portion can be generated, the fish can be caused to swim along the flow, so that the fish can be prevented from colliding with the side wall portion. . Small fish such as tuna larvae, larvae, and juveniles swim against the flow, and when water flows along the inner surface of the side wall, they start migrating along the inner surface of the side wall. Therefore, the tuna small fish travel around in a certain direction, so that the tuna collision hardly occurs. Therefore, the ginger of the present invention is optimal for aquaculture of small tuna fish.

  The internal pressure adjusting means may include a discharge port for discharging the culture water from the main body and a hose extending from the discharge port to the sea. Moreover, the said internal pressure adjustment means can also have a discharge port for discharging | emitting culture water from the said main-body part, and the conversion member which converts the diameter of the said discharge port into a small diameter.

  The side wall portion may be cylindrical and the bottom portion may be circular. Since the fish can swim to draw a circle along the inner peripheral surface of the side wall, it can swim without any obstacles.

  Dividing means can be arranged in the main body. Since the main body can be divided, each one can be made small, so that transportation and storage are easy.

  According to the ginger of the present invention, it is possible to avoid collisions between fish caused by deformation of the main body due to waves, winds, etc., and since the impact is absorbed when colliding with the ginger, the fish collide or get caught. Even if it collides, damage can be suppressed.

It is a perspective view which shows the ginger which concerns on Embodiment 1 of this invention. It is a perspective view which shows the ginger which concerns on Embodiment 2 of this invention.

(Embodiment 1)
A ginger according to Embodiment 1 of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the ginger 1 is an aquaculture tank that floats in the ocean and swims and fishes fish. Fish can be cultivated from fry to adult if the size of the ginger 1 is appropriately changed.

  In the ginger 1, a main body portion 11 surrounding a swimming fish is composed of a side wall portion 12 and a bottom portion 13. In the first embodiment, both the side wall portion 12 and the bottom portion 13 are non-water-permeable sheets. If fishes from fry to juveniles with a fish weight of about 1 to 100 g are cultivated, the diameter of the side wall 12 can be set to 1 to 30 m. Further, if fish including young fish weighing about 10 to 10 kg is cultivated, the diameter of the side wall 12 should be larger than 10 m.

As long as the soft sheet is formed by knitting fibers, a non-water-permeable sheet can be used. Moreover, if a soft sheet is a film form, it can be used without surface treatment. For example, the soft sheet may be a synthetic fiber such as polyester, a film-like synthetic resin, or a natural fiber such as cotton. Synthetic resins can be polyolefin resins, vinyl acetate resins, polyester resins, polyvinyl chloride resins, acrylic resins, polyvinylidene chloride, polyethylene terephthalate resins, polycarbonate resins, methyl methacrylate resins, polyamide resins, and the like. .
By forming the side wall portion 12 and the bottom portion 13 in any of these sheets, the side wall portion 12 and the bottom portion 13 are more flexible than a ginger made of concrete or a metal gauze, It also has opacity by coloring.

The side wall portion 12 is formed in a cylindrical shape. The bottom 13 is formed in a circular shape. The side wall part 12 and the bottom part 13 are continuously connected to the lower end part 12a of the side wall part 12 and the outer peripheral part 13a of the bottom part 13 by welding, sewing, pressure bonding, adhesion, or the like.
The side wall 12 and the bottom 13 are provided with fasteners 14 as dividing means for dividing the circumferential direction. The fastener 14 is provided from the upper end portion 12b of the side wall portion 12 to the lower end portion 12a along the height direction and from the outer peripheral portion 13a of the bottom portion 13 to the center portion 13b.
In the first embodiment, in order to divide the main body portion 11 into four, the fasteners 14 are arranged every 90 degrees from the center portion 13 b of the bottom portion 13.

A protective cover 15, which is a long sheet, is provided on the inner side surface 12 c of the side wall portion 12 so as to cover the fastener 14 along the fastener 14.
The protective cover 15 has one side of the fastener 14 fixed to the inner side surface 12c of the side wall portion 12 by welding, sewing, crimping, adhesion, or the like. Moreover, the other side of the fastener 14 is connected to the inner surface 12c of the side wall part 12 so that attachment or detachment is possible, for example by the surface fastener. The protective cover 15 can be formed of the same sheet member on the side wall portion 12.

In the side wall portion 12, water supply ports 16 are disposed in a state of penetrating through two portions of the upper portion 12 d. The two water supply ports 16 face the same direction so that the opening 16a of the water supply port 16 extends along the inner side surface so that the water flow flows in one direction along the inner side surface of the side wall portion 12.
Connected to the water supply port 16 is a pump 17 which is a water supply means for supplying culture water into the main body 11.

  The bottom portion 13 has a first discharge port 13m formed in the central portion 13b, and a second discharge having a hole diameter smaller than that of the first discharge port 13m for discharging remaining food around the first discharge port 13m. Four outlets 13n are formed. A hose 18 that extends below the bottom 13 toward the outer peripheral portion 13a and then extends to the sea is connected to the first outlet 13m. The first discharge port 13m is provided with a filter such as a mesh so that fish raised including dead fish are not discharged.

  In the first embodiment, a pump 17 for supplying the culture water and a water supply port for discharging the culture water to the main body 11, and a first discharge port 13 m and a first discharge port 13 m for discharging the culture water from the main body 11. An internal pressure adjusting means, which is an example of a tension adjusting means for adjusting the tension of the soft sheet, is constituted by the hose 18 connected to the.

The usage state of the ginger 1 according to Embodiment 1 of the present invention configured as described above will be described with reference to the drawings. The fish is described as a tuna fry.
The ginger 1 in a state of being divided by the fasteners 14 can be easily made into a bottomed cylindrical ginger 1 by connecting each from the divided state on land or in the ocean. Moreover, since the divided ginger 1 can be made small one by one, it is easy to carry and store.

Ginger 1 is placed in the ocean. The ginger 1 in the ocean is supplied with seawater or salt water equivalent to seawater through the water supply port 16 by the pump 17 into the main body 11 where the fish migrate.
The side wall portion 12 and the bottom portion 13 are made of a non-permeable soft sheet, and even if the second discharge port 13n, which is a small hole, is open, the amount of drainage is small, so that the aquaculture water is stored in the ginger 1.

  The ginger 1 is almost full when the aquaculture water is stored. Therefore, the side wall part 12 and the bottom part 13 will be in the tension | tensile_strength by the dead weight of culture water. Moreover, since the ginger 1 in which the culture water is stored is formed of a soft sheet, most of the entire weight is the culture water. Accordingly, since the ginger 1 floats with a little buoyancy, the ginger 1 can be tethered to a ginger frame (not shown) and can be held in a state where it is floated on the ocean. The ginger 1 may be provided with a float.

Furthermore, since the culture water is supplied into the main body 11 by the pump 17, pressure is applied to the side wall 12 and the bottom 13 from the inside, so that deformation of the side wall 12 and the bottom 13 due to waves and winds is suppressed. As a result, the shape retention of the main body 11 can be improved. Although a part of the aquaculture water supplied from the pump 17 is drained from the second discharge port 13n, most of it is drained from the first discharge port 13m having a diameter larger than that of the second discharge port 13n. Since the hose 18 connected to the first discharge port 13m extends to the sea, the drainage that ascends the hose 18 is pushed back from the relationship with the atmospheric pressure, so that the drainage is suppressed.
At this time, if the supply amount of the aquaculture water by the pump 17 is made larger than the drainage amount of the aquaculture water from the hose 18, the internal pressure of the main body 11 can be increased. If the internal pressure of the main body 11 increases, the supply amount of the culture water by the pump 17 is made the same as the drainage amount of the culture water from the hose 18. If it does so, the internal pressure of the main-body part 11 can be maintained.

  Therefore, by adjusting the output of the pump 17 to adjust the supply amount of the aquaculture water from the pump 17, or by adjusting the drainage amount of the aquaculture water from the main body 11 by the hose 18, the side wall portion 12 and the bottom portion are adjusted. If a constant pressure is maintained with respect to 13, and culture water is not contained, the amorphous ginger 1 can be maintained in a fixed shape.

  If the ginger 1 is deformed, the fry may be stressed, or the swimming direction may suddenly change to collide with other fry, possibly damaging the fry. However, although the ginger 1 is indefinite, it can maintain a constant shape by an appropriate internal pressure by the aquaculture water filled with the pump 17, so that the stress on the fry caused by the deformation of the main body 11 can be reduced. Collisions can be avoided.

  Even if the fry collides with the side wall 12 or the bottom part 13, the side wall part 12 and the bottom part 13 are formed of a soft sheet and do not use a frame or the like for shape retention. Absorbed. Therefore, damage to tuna fry can be minimized.

  The aquaculture water supplied from the pump 17 flows in one direction along the inner surface of the side wall portion 12 by the water supply port 16 directed in the direction along the inner surface of the side wall portion 12. The tuna larvae swim together in the direction against this water stream. Therefore, it is possible to avoid the tuna fry from colliding with other tuna fry while colliding with the side wall portion 12 while swimming. In particular, in the first embodiment, the side wall portion 12 has a cylindrical shape, so that the tuna fry can swim in a circle along the inner peripheral surface of the side wall portion 12. Therefore, it is possible to swim without any obstacles. Moreover, since a water flow is generated in one direction along the inner peripheral surface of the side wall part 12, tuna fry can also swim smoothly according to the water flow without any delay.

  Feed is given to cultivate tuna fry and the remaining feed settles, but it is discharged from the first outlet 13m and the second outlet 13n formed in the central part 13c of the bottom 13 to the outside of the ginger 1. Can do. In the first embodiment, since the bottom portion 13 is formed in a circular shape, the central portion 13c is depressed more than the outer peripheral portion 13a. The remaining bait flows along the bottom portion 13 and is concentrated in the central portion 13c. Further, the aquaculture water is discharged from the first discharge port 13m and the second discharge port 13n. Accordingly, since the aquaculture water is discharged from the first discharge port 13m and the second discharge port 13n formed in the central portion 13c of the bottom portion 13 and the aggregated residual food is discharged, the residual food is efficiently discharged. can do.

  The ginger 1 can be divided by being connected by a fastener 14, but since the fastener 14 is covered with a protective cover 15, fry can be prevented from being caught by the fastener 14 and being damaged.

Since the fish in the main body part 11 is surrounded by the side wall part 12 and the bottom part 13, garbage does not enter the main body part 11, so that the fish in the main body part 11 mistakenly ingests this garbage. Can be prevented.
Further, since the main body 11 is formed from a non-permeable soft sheet, fish can be cultivated in a state of being blocked from the outside, so that a filter or a germicidal lamp is appropriately installed in the pump 17. Intrusion of the red tide and pathogenic bacteria into the main body 11 can be blocked. Moreover, since the small fish used as the food of the fish in the main-body part 11 does not invade into the ginger 1 from the outside, the main-body part 11 is chased by the fish in the main-body part 11 chasing into the main-body part 11 when hungry. It is possible to prevent the fish inside from being killed by collision.
Furthermore, since the main body 11 is formed of an opaque sheet, it is possible to prevent the tuna fry from being caught by a fish shadow swimming outside the ginger 1.

  In the first embodiment, not only the side wall portion 12 but also the bottom portion 13 is formed of a non-water-permeable sheet. However, the bottom portion 13 is a water-permeable sheet as long as the internal pressure by the pump 17 can be secured. May be used.

  In the first embodiment, the first discharge port 13m is located at the center portion 13b of the bottom portion 13, but may be located at a position shifted from the center portion 13b of the bottom portion 13 or at the side wall portion 12. Moreover, although the internal pressure in the main-body part 11 is adjusted with the hose 18 from the 1st discharge part 13m, the adjustment valve which adjusts a pressure by adjusting the drainage amount of the aquaculture water discharged | emitted from the hose 18 is arrange | positioned at the hose 18 By doing so, you may adjust the internal pressure in the main-body part 11. FIG.

(Embodiment 2)
A ginger according to Embodiment 2 of the present invention will be described with reference to the drawings. In FIG. 2, the same components as those in FIG.
In the ginger 1x according to the second embodiment, a different diameter socket 19 is disposed as an internal pressure adjusting means at the first discharge port 13m. The different-diameter socket 19 is made to function as an internal pressure adjusting means which is an example of a tension adjusting means for adjusting the tension of the soft sheet by connecting the first different-diameter socket 19a and the second different-diameter socket 19b. .

As for the 1st different diameter socket 19a, the one side attached to the 1st discharge port 13m is formed in the diameter larger than the other side of an other side.
As for the 1st different diameter socket 19a, the inner diameter of the one side is the same as the outer diameter of the 1st discharge port 13m, or the outer diameter of the 1st different diameter socket 19a is the same as the inner diameter of the 1st discharge port 13m. Is formed. Accordingly, the first different diameter socket 19a is screwed into the first discharge port 13m.

As for the 2nd different diameter socket 19b, the one side attached to the 1st different diameter socket 19a is formed in the diameter larger than the other side of an other side.
The second different diameter socket 19b has the same inner diameter on one side as the outer diameter on the other side of the first different diameter socket 19a or the outer diameter on one side of the second different diameter socket 19b. It is formed to be the same as the inner diameter of the other side of the socket 19a. Thereby, the second different diameter socket 19b is screwed into the first different diameter socket 19a.

Thus, since the different diameter socket 19 is a conversion member that changes the first discharge port 13m having a large diameter to the diameter on the other side of the second different diameter socket 19b having a small diameter in the end, The internal pressure can be easily adjusted according to the amount of culture water supplied.
In the second embodiment, two different-diameter sockets 19 are connected. However, if the diameter of the discharge port can be discriminated from the beginning, the diameter of the first discharge port 13m can be used to determine other than the second different-diameter socket 19b. You may use the socket of the different diameter which changes to the side diameter. Moreover, when determining while finely adjusting an internal pressure, it is good also as what connected 3 or more different diameter sockets.

  In the second embodiment, the different diameter socket 19 for converting the diameter of the discharge port into a small diameter is used as the internal pressure adjusting means. However, the adjustment valve is provided by adjusting the amount of drainage to the first discharge port 13m. You may make it adjust the internal pressure of the main-body part 11 according to the opening degree.

  In the first and second embodiments, the side wall 12 of the ginger 1, 1x is cylindrical and the bottom 13 is formed in a circular shape. However, the side wall is different from the polygonal shape when viewed from above. It is good also as a shape. However, fish that swim like tuna can swim smoothly along the side wall 12 by making the side wall 12 cylindrical, so the side wall 12 is preferably cylindrical. Moreover, since it is desirable that the swimming fish can swim smoothly, the side wall part 12 can also be made into an inverted cone shape.

In the first and second embodiments, both of the sheets on which the side wall portion 12 and the bottom portion 13 are formed are water-impermeable, but depending on the supply amount by the pump 17 or the discharge amount by the first discharge port 13m. By adjusting the internal pressure of the main body part 11, either one or both of the side wall part 12 and the bottom part 13 may have water permeability. However, in the water-permeable sheet, even if the aquaculture water is supplied, the aquaculture water flows out from the water-permeable sheet, so that the supply amount by the pump 17 is increased.
In addition, for example, either one or both of the side wall part 12 and the bottom part 13 has water permeability, grasps the outflow amount of the aquaculture water from the water permeable sheet to the outside, and supplies the water supply amount by the pump 17 or the like. If managed, the first outlet 13m can be omitted.

  Further, the fastener 14 that is a dividing means may be connected to each of the divided main body portions 11 by hooks, belts or the like as long as the main body portion 11 can be divided.

Further, in the first and second embodiments, the internal pressure adjusting means functions as a tension adjusting means by adjusting the internal pressure by the amount of culture water supplied to the main body 11 and the amount of culture water discharged from the main body 11. However, the length adjusting means for adjusting the length of the side wall portion in the depth direction may function as the tension adjusting means.
For example, a dividing means such as a fastener is provided on the side wall portion, and a cylindrical side wall member is added as a length adjusting means between the vertically divided side wall portions. By doing so, the length in the depth direction of the side wall portion is increased by the amount of the added side wall member, and the overall weight is increased. Therefore, the side wall portion can be further stretched by its own weight. Therefore, the tension can be adjusted by adjusting the length of the side wall member to be added in the depth direction.

  The present invention is suitable for culturing various fishes in the ocean, lakes, rivers, and the like.

DESCRIPTION OF SYMBOLS 1,1x Ginger 11 Main body part 12 Side wall part 12a Lower end part 12b Upper end part 12c Inner side surface 12d Upper part 13 Bottom part 13a Outer peripheral part 13b Center part 13c Central part 13m 1st discharge port 13n 2nd discharge port 14 Fastener 15 Protection cover 16 Water supply Port 16a Opening 17 Pump 18 Hose 19 Different diameter socket 19a First different diameter socket 19b Second different diameter socket

Claims (9)

  A ginger provided with a tension adjusting means for adjusting a tension of the sheet, wherein a main body part surrounding a swimming fish is composed of a side wall part and a bottom part, at least the side wall part is made of a sheet.   The ginger according to claim 1, wherein the sheet is a water-impermeable sheet.   The ginger according to claim 1 or 2, wherein the tension adjusting means is an internal pressure adjusting means for adjusting an internal pressure by using the aquaculture water of the main body part, or a length adjusting means for adjusting a length of the side wall part in a depth direction.   The ginger according to claim 3, wherein the internal pressure adjusting means adjusts the internal pressure based on a supply amount of the aquaculture water to the main body and a drainage amount of the aquaculture water from the main body.   The ginger according to claim 4, wherein the internal pressure adjusting means has a water supply port that discharges the aquaculture water to the main body, and the water supply port faces the inner surface of the side wall.   The ginger according to claim 4 or 5, wherein the internal pressure adjusting means includes a discharge port for discharging culture water from the main body and a hose extending from the discharge port to the sea.   The said internal pressure adjustment means has a discharge port for discharging the aquaculture water from the said main-body part, and the conversion member which converts the diameter of the said discharge port into a small aperture | diameter. Ginger.   The ginger according to any one of claims 1 to 7, wherein the side wall portion is cylindrical and the bottom portion is circular.   The ginger according to any one of claims 1 to 8, wherein a dividing means is arranged in the main body.

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