JP2019041701A - Shellfish aquaculture device - Google Patents

Abstract

To provide a shellfish aquaculture device that can effectively increase the number of shellfish individuals.SOLUTION: A shellfish aquaculture device has a flow-down aquarium where the growing water W is made to flow from an upstream toward a downstream. The flow-down aquarium includes a mother shellfish growing part 6 for growing mother shellfish C, and a partition 7 coming in communication with the mother shellfish growing part 6 through branch ports 7a, 12. The growing water W diverging from the mother shellfish growing part 6 to the partition 7 through branch port 7a, 12 flows into the partition 7 through filters 11b, 13 having a pore part where the eggs laid at the mother shellfish growing part 6 or the floating larvae hatched from the eggs can pass.SELECTED DRAWING: Figure 6

Description

  The present invention relates to an aquaculture apparatus for aquaculture shellfish on land.

  Studies on shellfish aquaculture are actively being conducted for the stable supply of shellfish such as clams and clams. Conventionally, marine aquaculture has been the mainstream as a method of aquaculture of shellfish, but since the growth of shellfish is influenced by the weather, the marine environment, etc., in recent years, onshore aquaculture which can easily manage the breeding environment has been attracting attention.

  As aquaculture equipment for shellfish, a plurality of inclined water channels are installed side by side, and growing water such as seawater, fresh water, brackish water, etc. containing many plankton to feed on shellfish flows from the upstream side to the downstream side. There is known an apparatus for arranging shellfish in a water tank and cultivating shellfish in an environment close to a flowing natural environment (see, for example, Patent Document 1).

Patent No. 3493357 (page 3, FIG. 4)

  The apparatus for cultivating shellfish described in Patent Document 1 is effective as one that promotes the growth of shellfish well. However, when the shellfish during spawning is not considered for coping, when shellfish spawns during breeding, most of the floating larvae hatched from the egg or the eggs are outside the aquaculture apparatus along with the breeding water. Since the composition is such that only floating larvae that have been drained and settled in the channel water tank remain, they are not effective from the viewpoint of increasing the number of shellfish individuals. In addition, for breeding water, zooplankton larger than eggs or floating larvae (for example, about 0.1 mm to 0.3 mm) (for example, daphnia of about 1 mm to 3 mm, Uliscan, nematode larvae, etc.) There is a problem in that the eggs or suspended larvae are preyed, and the survival rate of the eggs or suspended larvae is significantly reduced.

  The present invention was made in view of such problems, and an object of the present invention is to provide a shellfish culture apparatus capable of effectively increasing the number of shellfish individuals.

In order to solve the above-mentioned subject, the culture equipment of shellfish of the present invention,
An apparatus for cultivating shellfish having a flowing water tank in which growing water flows from upstream to downstream,
The flowing-down water tank includes a mother shell growing unit for growing a mother shell, and a partition unit in communication with the mother shell growing unit via a branch port,
The breeding water branched from the mother shell growing section to the partition section through the branch port has an egg laid in the mother shell growing section or a pore section through which floating larvae hatched from the egg can pass. It flows into the section through a filter.
According to this feature, since the eggs or floating larvae laid in the mother shell growing portion are collected into the compartments through the pore portion of the filter together with the flow of the breeding water, the eggs or floating larvae go out of the aquaculture apparatus. The large-sized zooplankton which can suppress the discharge and feed on the eggs or the floating larvae, the inflow into the compartment will be suppressed by the filter, and the zooplankton can feed the eggs or the floating larvae. The shellfish population can be effectively increased.

The flowing water tank is characterized in that a plurality of flowing water tanks are connected in series so as to be lower toward the downstream side.
According to this feature, since the eggs or suspended larvae not recovered in the upstream compartment can be recovered in the downstream compartment, the recovered amount of eggs or suspended larvae can be increased.

A ridge is provided in the vicinity of the upstream side of the partition portion.
According to this feature, since the compartments are disposed at the point where the breeding water falls from the weir, eggs or suspended larvae can be effectively recovered.

The section is characterized in that it is disposed at a position lower than the floor surface of the mother shell growing section.
According to this feature, the compartments become depressions and the influence of the flow of breeding water is reduced, so that eggs or floating larvae can be effectively retained in the compartments.

The partition is characterized in that it is formed so as to extend outward beyond the opening area of the branch port.
According to this feature, the periphery of the branch port is turned back, and it is possible to prevent the eggs or floating larvae once taken into the compartment from flowing out of the compartment.

The floor surface of the mother shell growing portion is formed of a mesh-like face material having a plurality of through holes, and the branch port is a through hole of the face material.
According to this feature, eggs or floating larvae can be effectively recovered over a wide range.

A pump is provided to circulate the growing water.
According to this feature, since the eggs or suspended larvae which could not be recovered in the compartment can be returned to the upstream side again by the pump, the recovery rate of the eggs or suspended larvae can be improved.

It is the schematic which shows the aquaculture apparatus of shellfish in an Example. It is a perspective view which shows the aquaculture part in aquaculture apparatus. It is the schematic which shows the aquaculture part in aquaculture apparatus. It is a side sectional view showing the structure of a flowing down tank. It is a disassembled perspective view which shows the structure of a flowing-down water tank. (A) is a side cross-sectional view showing the peripheral structure of the compartment, (B) is an explanatory view showing how eggs and floating larvae are collected in the compartment. It is explanatory drawing which shows a mode that the egg in a division part and a floating larva are sent to a larval fish tank. It is a perspective view which shows the modification of a base member.

  EMBODIMENT OF THE INVENTION The form for implementing the aquaculture apparatus of shellfish which concerns on this invention is demonstrated below based on an Example.

  An apparatus for cultivating shellfish according to an embodiment will be described with reference to FIGS. 1 to 8. Hereinafter, the paper surface left side of FIG. 1 is demonstrated as the front side (downstream side) of the culture apparatus of shellfish.

  The shellfish aquaculture apparatus 1 of the present embodiment is the content of the invention "Aquarium Water Tank" of the Japanese Patent Application No. 2016-86800 filed on Oct. 31, 2014 by applicant: Zero Staff Co., Ltd. "Sewage water is provided inside the sewage treatment table placed above the fish rearing tank, and a circulation waterway is formed with shellfish breeding tanks for shelling and discharging shellfish in the inside and shellfish laying tanks A treatment tank and a water conveyance partition are provided inside the above-mentioned sewage treatment tank to define a shell filter bed, and an overflow weir to let the water which has once passed through the shell filter bed flow like a waterfall is provided. This method is characterized in that it comprises a reflux drainage tank in which the water overflowing the weir is returned to the fish breeding tank through the drainage port on the bottom, and a part of the technology is applied to the circulation type aquaculture technology.

  As shown in FIG. 1, the shellfish aquaculture apparatus 1 of the present embodiment (hereinafter simply referred to as aquaculture apparatus 1) is an aquaculture apparatus for aquaculture clams on land. The aquaculture apparatus 1 includes a first pool 2 storing breeding water W including plankton, a culture unit 3 into which the breeding water W flows in from the first pool 2, and a second into which the breeding water W overflowing from the culture unit 3 flows It mainly comprises a pool 4, a pump P 1 for feeding growth water W from the first pool 2 to the culture unit 3, and a pump P 2 for feeding growth water W from the second pool 4 to the first pool 2.

  The first pool 2, the aquaculture unit 3, and the second pool 4 are arranged to be gradually lower, and the inclination thereof allows the breeding water W to flow from the first pool 2 toward the second pool 4 ing. The breeding water W stored in the second pool 4 is pumped up to the first pool 2 by the pump P2. That is, the breeding water W is circulated in the aquaculture apparatus 1.

  Further, in the present embodiment, the second pool 4 is used as hydroponic culture of vegetables and plants, and as a fish farm for aquatic organisms such as catfish, yamame, and mozuku crab. The aquaculture unit 3 and the second pool 4 are provided in a building, which facilitates temperature management.

  In addition, a plurality of solar panels 5, 5, ... are installed on the roof of the building where the aquaculture unit 3 is provided, so that electricity can be supplied to the pump P1, the pump P2, lighting in the building, etc. . Moreover, since the roof of the building where the second pool 4 is provided is made of a translucent member (for example, glass etc.) and can take in sunlight, it is suitable for hydroponics and aquatic culture. Environment can be created.

  In addition, in the second pool 4, residual feed and excrement of aquatic organisms are generated, but these are pumped to the first pool 2 by the pump P2, and are absorbed here by phytoplankton as a nutrient source. Furthermore, the phytoplankton grown in the first pool 2 is supplied as a highly nutritive breeding water W containing a large amount of feed to the shellfish of the culture unit 3. In addition, the dissolved organic matter remaining in the breeding water W supplied to the culture unit 3 is oxidized and removed in the culture unit 3 by aerobic microorganisms mainly composed of bacteria attached to shellfish and sand filter beds, so the organic matter is It can suppress that the breeding water W of the state which increased excessively flowed in into the 2nd pool 4.

  In addition, an appropriate amount of deciduous leaves of a broadleaf tree, such as kuunigi and nara, is enclosed in a fixed net-like bag N in each pool where the growing water W of the first pool 2 and the second pool 4 is stored. The humic substances remaining after the decomposition of woody components such as lignin in the growing water W by soaking and sinking in the water (The humic substances flowing into the sea from the mountain are considered to have a favorable effect on aquatic organisms, but in this application, This is defined as humic substance), which is also characterized in that it is eluted from the fallen leaves. According to this, it is possible to supply essential nutrient components for preventing the cadaver case by calcium dissolution of the shellfish of shellfish of shellfish of culture part 3 and juvenile clam, hydroponic cultivation of second pool 4 and growing process of freshwater organisms. A great amount of training effects can be achieved.

  Next, a specific configuration of the aquaculture unit 3 will be described. As shown in FIG. 2 and FIG. 3, a plurality of culture units 3 are connected in a step-wise fashion so as to be gradually lowered from the upstream side (the first pool 2 side) to the downstream side (the second pool side) And the juvenile water tank 32 continuously provided downstream of the downstream flow tank 31, the side wall 33 surrounding the side surfaces of the falling water tank 31, 31, ... and the juvenile water tank 32, It consists mainly of 33, .... In addition, a plurality of flowing water tanks 31, 31,...

  As shown in FIG. 3 and FIG. 4, each flowing-down water tank 31 is roughly divided into a mother shell raising section 6 for growing a mother shell C and a dividing section 7 divided from the mother shell raising section 6. Each compartment 7 communicates with the juvenile aquarium 32 through the pipe 8 (see FIG. 7). In addition, a valve (not shown) is provided at a predetermined position of the pipe 8, and by closing the valve, it is possible to store eggs or suspended larvae described later in the compartment 7; By opening the valve, eggs or suspended larvae can be made to be able to flow into the juvenile aquarium 32.

  Next, a specific configuration of the flowing water tank 31 will be described based on FIGS. 4 to 7. As shown in FIGS. 4 and 5, each flowing water tank 31 mainly includes a base member 10, a filter member 11 mounted on the base member 10, and a wire mesh member 12 disposed on the filter member 11. It is configured.

  The base member 10 is configured by bending a metal plate, and includes a horizontally extending flat base 10a, a first inclined portion 10b bent so that the upstream side of the base 10a is inclined upward, and the base A vertical portion 10c bent downward substantially vertically on the downstream side of 10a, a horizontal portion 10d bent horizontally from the lower end of the vertical portion 10c to the downstream side, and an upward direction from the horizontal portion 10d to the upstream side And a second inclined portion 10e which is bent to be inclined.

  A space having a substantially triangular shape in sectional view, which is divided from the other space (the mother shell raising portion 6) by the vertical portion 10c, the horizontal portion 10d, and the second inclined portion 10e, is formed extending in the left-right direction. Is the partition 7 described above. Further, the upper end of the second inclined portion 10e is separated from the vertical portion 10c to the downstream side, whereby an opening 7a communicating with the partition 7 is formed in a slit shape extending in the left and right direction. The opening 7 a functions as a branch port for branching the breeding water W flowing through the mother shell growing section 6 to the dividing section 7.

  Further, a plate-like piece 10f extending horizontally in the downstream direction is fixed to the first inclined portion 10b. Further, one end of the filter 13 in which a plurality of pore portions are formed is fixed to the upper end of the first inclined portion 10b by a fixing member such as an adhesive, and the other end of the filter 13 is adjacent on the upstream side It is being fixed to the weir component 14 of the flowing water tank 31 by the said fixing member.

  Further, on the upstream side of the uppermost flowing water tank 31, a receiving portion 34 for receiving the breeding water W sent out from the first pool 2 is disposed via the dividing portion 7 ′, and the uppermost flowing water tank 31 The other end of the filter 13 'is fixed to the base 34a constituting the receiving portion 34 by the fixing member. That is, the opening 7a of the compartment 7 and the opening 7a 'of the compartment 7' are covered by the filters 13, 13 '. Incidentally, the diameter of the pore portion of the filters 13 and 13 'of this embodiment is approximately 0.5 mm.

  The rod-constituting member 14 is formed of a flat metal plate and includes a base 14a having a substantially rectangular shape in a front view, and protrusions 14b and 14b projecting downward at both left and right ends of the base 14a. , 14b, and includes a bent portion 14c bent upstream. In the weir component 14, the protrusions 14 b are fixed by welding or the like in the vicinity of the upper portion of the vertical portion 10 c of the base member 10. Thus, a slit 15 surrounded by the base portion 14a, the projecting portions 14b and 14b, and the vertical portion 10c is formed between the base member 10 and the weir component member 14.

  The filter member 11 includes a frame 11 a having a substantially rectangular shape in a top view, and a filter 11 b having a plurality of pore portions stretched inward of the frame 11 a. It is placed over the piece portion 10 f and the bending portion 14 c of the weir component 14. Therefore, the filter member 11 is installed in a state of being separated upward by a predetermined distance from the base 10 a of the base member 10.

  A seal member (not shown) is disposed at the contact portion between the frame 11a of the filter member 11 and the piece 10f of the base member 10 and the bent part 14c of the weir component 14 and the frame 11a and the piece 10f. And the breeding water W does not go around from between it and the bending part 14c. The filter 11b of this embodiment is the same as the filters 13 and 13 '(the pore size of the filter is approximately 0.5 mm).

  The wire mesh member 12 is formed in a box shape with a face plate material of a cross sectional view having a plurality of concavo-convex shapes and is erected so as to surround the wire mesh member 12 from the floor surface portion 12e and the peripheral portion of the floor surface portion 12e. Side walls 12a, 12b, 12c and 12d. A plurality of through holes, which are rougher than the pores of the filter 11b, are formed in the floor 12e and the side walls 12a, 12b, 12c, and 12d. That is, each surface of the wire mesh member 12 constitutes a mesh-like surface material. Further, the wire mesh member 12 is placed above the filter member 11, and a plurality of mother shells C are placed on the floor surface portion 12 e of the wire mesh member 12. That is, the space on the floor surface portion 12 e of the wire mesh member 12 constitutes a mother shell raising section 6. The wire mesh member 12 only needs to have the floor surface portion 12e to be the mother shell growing portion 6, and the configuration of the side wall portions 12a, 12b, 12c, and 12d may be omitted.

  Further, the lower space S of the wire mesh member 12 is extended to the slit 15. The through hole of the wire mesh member 12 functions as a branch port for branching the breeding water W flowing through the mother shell growing portion 6 to the dividing portion 7.

  As described above, since the floor surface of the mother shell nurturing unit 6 does not use sand or pebbles, the mother shell C does not sandwich pebbles or sucks sand into the viscera, so sand removal work at the time of shipment, etc. There is no need to do it. Since most of the load of the wire mesh member 12 is deposited in the frame 11 a of the filter member 11, the load of the wire mesh member 12 applied to the filter 11 b can be suppressed.

  Further, the recess of the wire mesh member 12 is formed to a size that does not allow the mother shell C to enter, and a gap corresponding to the recess is formed between the mother shell C and the wire mesh member 12. Makes it difficult to close the through hole of the wire mesh member 12. Further, the convex portion of the wire mesh member 12 is formed to have a width such that the mother shell C contacts a plurality of convex portions, and the lowermost mother shell C by the mother shells C, C,. The load is dispersed, and the load on the lowermost mother shell C is reduced.

  Side wall portion 12a on the front side of wire mesh member 12 and side wall portions 12b and 12c positioned in the left-right direction when viewed from the front are erected substantially vertically from wire mesh member 12, and the side wall portion on the rear surface side (upstream side) 12 d is erected to be inclined along the first inclined portion 10 b. Further, grip portions 12A and 12B extending in a substantially vertical direction are respectively fixed to upper ends of the front and rear side wall portions 12a and 12d. The grips 12A and 12B are made of metal plate members. The grips 12A and 12B may be configured by extending the side wall 12a and the side wall 12d of the wire mesh member 12.

  According to this, since the wire mesh members 12 can be lifted together with the mother shells C, C,... By gripping the gripping portions 12A, 12B, maintenance such as cleaning work for preventing clogging of the filter member 11 is simplified. Can be performed (see Figure 8). In addition, since the upper end portions of the gripping portions 12A and 12B are folded back to form a step portion, it is easy to hook a finger or the like. The side wall portions 12b and 12c positioned in the left-right direction are illustrated only in FIGS. 5, 7, and 8, and are not illustrated in FIGS. 2 to 4 and 6.

  As shown in FIG. 6, the growing water W flowing into the flowing water tank 31 is filled into the mother shell growing portion 6 by the weir component 14 and a part of the growing water W passes through the filter 11b and then the slit 15 Branch to the inside of the compartment 7 and overflow the weir component 14 and flow into another downstream water tank 31 adjacent to the downstream side. In addition, it is easy to adjust the water level of the breeding water W in the mother shell growing part 6 by changing the height of the cocoon forming member 14.

  As described above, since each flowing-down water tank 31 is connected in a step-like manner and the weir component 14 is disposed at the step portion, the flow of growing water W flowing down becomes gentle, and the river Can reproduce an environment close to nature like.

  Moreover, as shown to Fig.6 (a), the division part 7 is arrange | positioned in the downstream vicinity vicinity of this cage | basket structure member 14 in the state which orient | assigned the opening part 7a to the breeding water W which overflows from the cage | basket structure member 14. Therefore, a part of the breeding water W overflowing from the weir component 14 passes through the filter 13 and is branched into the compartment 7.

  Further, the opening 7a of the partition 7 has a front and rear dimension L1 smaller than the front and rear dimension L2 of the bottom (the horizontal portion 10d side) of the partition 7 (L1 <L2). In other words, the partition 7 is formed to extend outward from the opening region of the opening 7a. Further, the partitioning portion 7 is disposed at a position lower than the floor surface of the upstream shellfish breeding portion 6, that is, the floor surface portion 12e of the upstream wire mesh member 12 (see phantom line α in FIG. 6A). .

  Next, how an egg or floating larvae are collected in the compartment 7 will be described based on FIG. 6 (b). In addition, although large-sized zooplankton is shown by "O" here and egg or floating larvae are shown by "dot", the ratio of zooplankton and eggs or floating larvae is considered for convenience of explanation. Absent. In addition, the descriptions of small-sized zooplankton (0.5 mm or less), phytoplankton and the like are omitted.

  As shown in FIG. 6 (b), when the mother shell C oviposits in the mother shell raising section 6, the floating larvae hatched from the laid eggs or eggs float in the breeding water W. The eggs or floating larvae floating on the water surface side of the breeding water W overflow with the breeding water W from the weir component 14, and a part of the eggs or floating larvae passes through the filter 13 and is collected in the compartment 7 Ru.

  Specifically, since the size of an egg or suspended larvae is generally about 0.1 mm to 0.3 mm, it passes through the pore portion (0.5 mm) of the filter 13 and is collected in the compartment 7 Will be On the other hand, large-sized zooplankton which feed on eggs or suspended larvae are daphnia, juveniles, nematode larvae, etc., and generally have a size of about 1 mm to 3 mm. It can hardly pass the department. Therefore, large-sized zooplankton is difficult to enter into the compartment 7, and the eggs or suspended larvae collected in the compartment 7 are not preyed, so the survival rate of eggs or suspended larvae is improved. Do.

  In addition, zooplankton of 0.5 mm or less may enter into the compartment 7, but there is almost no difference in size compared to eggs or suspended larvae, so eggs or suspended larvae are to be fed. Is reduced.

  Further, since the partition 7 is disposed in the vicinity of the downstream side of the weir component 14 with the opening 7 a facing the growing water W overflowing from the weir component 14, the compartment 7 overflows from the weir component 14 Eggs or floating larvae can be effectively recovered in the compartment 7 together with the breeding water W.

  The eggs or floating larvae not collected in the compartment 7 move to the downstream flowing water tank 31. Since the flowing-down water tank 31 is provided in a plurality on the downstream side, eggs or suspended larvae not collected in the upstream compartment 7 can be recovered in the downstream compartment 7, so that the eggs or suspended larvae are The amount of recovery can be increased.

  On the other hand, the eggs or floating larvae floating on the bottom side of the mother shell growing portion 6 pass through the wire mesh member 12 and the filter 11b together with the growing water W and move into the lower space S below the filter 11b. At this time, the zooplankton which feeds on eggs or suspended larvae is inhibited from entering the compartment 7 by the filter 11b. The eggs or floating larvae moved to the lower space S are collected in the compartment 7 through the slits 15. Thus, eggs or floating larvae can be effectively recovered in a wide range by using the through holes of the floor surface 12 e of the wire mesh member 12, that is, the substantially entire surface of the bottom of the mother shell raising portion 6.

  Further, as described above, since the mother shell C does not enter into the concave portion of the wire mesh member 12, it is difficult for the mother shell C to close the through hole portion of the concave portion in the wire mesh member 12. It is easy for floating larvae to pass through the through holes of the concave portion in the wire mesh member 12.

  Further, as described above, since the longitudinal dimension L1 of the opening 7a of the compartment 7 is smaller than the longitudinal dimension L2 of the bottom of the compartment 7, the peripheral edge of the opening 7a is turned back, and the compartment 7 It is possible to prevent the eggs or floating larvae once taken into 7 from being rolled up by the flow of the breeding water W and flowing out of the compartment 7 again.

  In addition, since the partitioning portion 7 is disposed at a position lower than the floor surface (virtual line α) of the mother shell breeding portion 6, the partitioning portion 7 becomes a depression and the influence of the flow of breeding water W on the partitioning portion 7 is reduced. Do. That is, since the rearing water W is easily retained on the bottom side of the partition 7, eggs or floating larvae can be effectively retained in the partition 7.

  Thus, the eggs or floating larvae collected in the partition 7 are stored in the partition 7 and kept for a predetermined period by closing the valve of the pipe 8. Here, the predetermined period refers to a period until eggs or floating larvae become invaginated juveniles. After a predetermined period of time has elapsed, the bottomed juvenile clams are allowed to flow into the juvenile water tank 32 by opening the valve.

  Specifically, as shown in FIG. 7, the pipe 8 is connected to the right end (one end) of the section 7 arranged at the rightmost side among the sections 7 continuously provided on the left and right, A supply pipe (not shown) capable of supplying the growing water W is connected to the left end (the other end) of the section 7 arranged at the leftmost side among the sections 7 arranged in series. By opening the valve of the pipe 8 and supplying the breeding water W from the supply pipe, the water pressure of the breeding water W causes the bottomed juvenile clam to be sent out to the juvenile aquarium 32 via the pipe 8. In addition, a sheet-like wire mesh member 12 'is laid on the bottom of the juvenile aquarium 32, and the invaginated juveniles flowing into the juvenile aquarium 32 adhere to the wire mesh 12' by foot thread, It is nurtured in that state (see FIG. 3).

  In addition, since an egg becomes a floating larva (so-called, D type larva) in about 1 day after fertilization, and becomes an earthling young shellfish in about 7 days to 10 days from fertilization, it settles down with the breeding water W of the supply pipe The work of sending the juveniles to the juvenile aquarium 32 is performed in a cycle of about 10 days. Furthermore, the cycle of the operation of feeding the bottom-in-birth juveniles to the juvenile shell 32 may be freely changed.

  As described above, since individual eggs can be grown in the juvenile aquarium 32 after being formed into a juvenile navel, while collecting eggs or suspended larvae in the compartment 7 and suppressing being preyed on by zooplankton, individuals of shellfish are isolated. The number can be increased effectively. In addition, the indwelling juvenile clam flowing into the juvenile clam tank 32 remains in the juvenile clam tank 32 by adhering to the wire mesh member 12 ′, but the zooplankton is discharged into the second pool 4 together with the breeding water W Therefore, it is possible to reduce that predatory juveniles are fed by zooplankton.

  In addition, it may flow into the juvenile clam tank 32 in a state of eggs or floating larvae, in which case the eggs or floating larvae may overflow from the juvenile clam tank 32 and flow into the second pool 4 (see FIG. 3) ). The eggs or floating larvae that have flowed into the second pool 4 are pumped up by the pump P2 into the first pool 2 together with the breeding water W and are again flowed into the culture unit 3, so they are not discharged out of the aquaculture apparatus 1, The recovery rate of eggs or floating larvae can be increased.

  In addition, although the form which circulates the breeding water W in the aquaculture apparatus 1 with the pump P2 was illustrated in the present Example, if the breeding water W is the structure which flows through the inside of the culture part 3 at any time, the breeding water W is not circulated. It may be discharged out of the aquaculture apparatus 1. Even in this case, since the eggs or suspended larvae are recovered by the compartment 7, the recovery rate of eggs or suspended larvae can be enhanced compared to the conventional aquaculture apparatus without the compartment 7, Can be effectively increased.

  In addition, the shape and position of the compartments are not limited to those of the embodiment described above, and part of the breeding water W flowing through the mother shell breeding part 6 can branch and flow in, and can accommodate eggs and floating larvae. If it is partitioned, it may be configured freely. For example, a section with a concave shape in cross-sectional view, which is configured such that the branch port is directed to the upstream side of the breeding water W flowing through the mother shell growing portion 6, may be disposed on the water surface side of the breeding water W.

  Moreover, although the said embodiment illustrated the form provided with two branch ports (through-hole part of the opening part 7a and the metal-mesh member 12) which divides part of breeding water W in the division part 7, the division part was illustrated. One or more than three branch ports may be provided. The shape of the branch may be designed freely.

  Moreover, in the said Example, although the shellfish aquaculture in the aquaculture apparatus 1 was demonstrated as shijimi, it is not restricted to this, For example, it can change variously, such as a clam, an oyster, an abalone.

  Moreover, in the said Example, although the form in which the mesh size of the pore part in filter 11b, 13, 13 'was formed in about 0.5 mm was illustrated, it is not limited to this, 0.1 mm- It is sufficient that eggs or floating larvae having a size of about 0.3 mm can pass, and animal plankton having a size of about 1 mm to 3 mm can not pass easily. That is, the mesh size may be about 0.01 mm to 1 mm, and more preferably about 0.05 mm to 0.5 mm. The size of the mesh of the pore of the filter may be changed in accordance with the size of the eggs or suspended larvae of the shellfish cultured in the aquaculture apparatus 1.

  Moreover, although the said embodiment illustrated the form formed in step shape so that falling water tanks 31, 31, ... might become low toward a downstream, it is not limited to this, For example, falling water tanks A plurality of inclined surfaces may be arranged so as to be linearly continuous. Further, the flow velocity of the breeding water W may be appropriately adjusted by changing the heights of the steps of the flowing water tanks 31, 31,.

  The following may be mentioned as a modification of the base member. For example, as shown in FIG. 8, the base member 100 is a box-like frame having a rectangular shape in a plan view, and has a space in which a plurality of (for example, three) wire mesh members 12 can be arranged side by side. Each space is partitioned by partition walls 100a and 100a. A partition is disposed on the downstream side of the base member 100, and a slit is provided on the downstream side wall of the base member 100 to communicate the partition and the upstream partition. (Not shown). According to this, since the plurality of wire mesh members 12 can be handled in a united manner, the installation operation of the aquaculture apparatus 1 can be easily performed. Further, by lifting the wire mesh member 12, maintenance such as cleaning work for preventing clogging of the filter member 11 can be easily performed. Moreover, the loading / unloading of the wire mesh member 12 can be guided by the partition walls 100a, 100a, 100a.

  Although the embodiments of the present invention have been described above with reference to the drawings, the specific configuration is not limited to these embodiments, and any changes or additions may be made without departing from the scope of the present invention. Be

  For example, although an embodiment using an adhesive as a fixing member for fixing the filters 11b, 13 and 13 'has been exemplified in the above embodiment, the present invention is not limited to this, and for example, it may be fixed by screws or the like. .

  In the above embodiment, the juvenile clam tank 32 is connected to the downstream side of the most downstream downstream water tank 31, but it is connected to each of the compartments 7, 7 ', ... For example, you may utilize the juvenile shell water tank provided independently, without being connected directly with the flowing water tank 31, 31, .... According to this, since it is suppressed that large-sized zooplankton flows in in a larval fish tank, it can reduce that an egg or a floating larva and invaginated juvenile shellfish are preyed in a larval fish tank.

  In addition, the pipe 8 connecting the juvenile water tank 32 and the respective compartments 7, 7 ', ... is provided with a valve for switching the communication state between the young fish aquarium 32 and the respective compartments 7, 7', ... However, the configuration of the valve may be omitted so that the juvenile aquarium 32 and the compartments 7, 7 ',... Are always in communication.

  Moreover, in the said Example, although the upper surface of the wire mesh member 12 was demonstrated as the mother shell raising part 6, it is good also as omitting the structure of the wire mesh member 12, and making the upper surface of the filter member 11 into the mother shell raising part 6.

1 aquaculture apparatus 6 mother shell breeding section 7, 7 'compartment 7a, 7a' opening (branch)
11b filter 12 wire mesh member (mesh-like face material)
13, 13 'filter 14 堰 component (堰)
31 flowing water tank 32 juvenile shell water tank (water tank different from flowing water tank)
C mother shell P1 pump P2 pump W breeding water

Claims (7)

An apparatus for cultivating shellfish having a flowing water tank in which growing water flows from upstream to downstream,
The flowing-down water tank includes a mother shell growing unit for growing a mother shell, and a partition unit in communication with the mother shell growing unit via a branch port,
The breeding water branched from the mother shell growing section to the partition section through the branch port has an egg laid in the mother shell growing section or a pore section through which floating larvae hatched from the egg can pass. An apparatus for cultivating shellfish characterized by flowing into the compartment through a filter.   The apparatus for aquaculture shellfish according to claim 1, wherein the flowing-down water tank is connected in a plurality so as to be lower toward the downstream.   3. The shellfish aquaculture apparatus according to claim 1, wherein a weir is provided in the vicinity of the upstream side of the compartment.   The said division part is arrange | positioned in the position lower than the floor surface of the said mother shellfish breeding part, The culture apparatus of the shellfish in any one of the Claims 1 thru | or 3 characterized by the above-mentioned.   The said division part is formed so that it may spread in the outward direction rather than the opening area | region of the said branch port, The culture apparatus of shellfish of any one of Claim 1 thru | or 4 characterized by the above-mentioned.   The floor surface of the mother shell growing portion is constituted by a mesh-like face material having a plurality of through holes, and the branch port is a through hole of the face material. The aquaculture apparatus for shellfish according to any one of 5.   The culture apparatus for shellfish according to any one of claims 1 to 6, further comprising a pump for circulating the growth water.

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