JP2017086070A - Breeding device of test small fish - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a collective breeding device of test small fish having excellent individual observation properties of each zebra fish although a large number of zebra fish can be bred with different conditions in a narrow space.SOLUTION: A large number of drawer-shaped water tanks 1 storing each zebra fish individually are supported in pockets of a frame 2 so as to slide. The pockets of the frame 2 are aligned in a large number in vertical and horizontal directions. At least a pair of side walls of the frame 2 are formed of transparent resin and a large number of lid covers cover upper openings of the respective drawer-shaped water tanks individually and detachably. A water supply unit 5 arranged adjacently on a depth side of the frame 2 has distribution water tanks in a large number of stages. The distribution water tank in each stage supplies water to the drawer shaped water tank 1 in the same stage. Water falls sequentially from the distribution water tank in an uppermost stage to the distribution water tank in a lowermost stage.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an apparatus for raising small test fish, and more particularly to an apparatus for managing a test zebrafish.

Zebrafish that grows quickly and is small is suitable for determination of drug effects and gene processing effects. For example, it is necessary to examine a very large number of individuals exceeding 100 with different test conditions in determining the drug effect. In gene processing, it is necessary to select individuals having appropriate characteristics from a large number of individuals produced. In many cases, this sorting is performed optically.

For this reason, it is necessary to keep the numbered zebrafish individually. This means that a large number of aquariums need to be prepared separately for each zebrafish. However, in order to keep zebrafish, water must be circulated in each tank and food must be regularly fed to each tank. After all, individually feeding zebrafish in more than a hundred aquariums required a lot of space and was time consuming.

Patent Document 1 proposes a collecting water tank in which a large number of water chambers each accommodating a zebrafish are assembled. A large number of water chambers are formed in the collecting water tank by partitioning the collecting water tank formed in a bowl shape in a matrix by partition walls called dividers. In order to prevent zebrafish from popping out, these tanks are covered with a long cover plate for each row. Dividers have holes through which water can flow. The water supplied to the common water tank by the water supply device is discharged to the outside through each water tank.

However, although this collective tank type zebrafish feeding device can individually feed a large number of zebrafish in a small space, it has been found that the following problems have to be solved. The first problem is that the zebrafish in each water chamber cannot be kept under different conditions because water sequentially flows through each water chamber through the partition wall. For example, even if the amount of feed and the amount of drug administered to each zebrafish is changed, they move to the adjacent water chamber through flowing water, so that the conditions given to each water chamber are made common.

The second problem is that with this type of zebrafish individual feeding device, it is necessary to frequently observe changes in each zebrafish during feeding. However, in the apparatus of Patent Document 1 in which each water chamber is arranged in a matrix, the zebrafish in each water chamber can be observed only from above. Since the projected area from above of the zebrafish is very small, it was difficult to discriminate changes in the zebrafish from only above.

US2013 / 02006077A1

One object of the present invention is to provide a collective test small fish breeding apparatus capable of breeding a large number of small test fish under different conditions. Another object of the present invention is to provide a collective test small fish breeding device that allows easy observation and determination of each test small fish even though a large number of small test fish can be individually housed in a small space. That is.

According to one aspect of the apparatus of the present invention, a number of aquariums each containing a small test fish are each formed in a drawer shape. The frame supporting each drawer-shaped water tank has a predetermined number of rectangular pockets arranged at least in the left-right direction, and each drawer-shaped water tank is individually slidably accommodated in each square pocket. Thus, all drawer-like water tanks are individually pulled out of the rectangular pockets of the frame as needed and then pushed back into the rectangular pockets of the frame.

Since at least the side wall portion of the drawer-shaped water tank is formed of a transparent resin, the drawer-like water tanks are arranged from the side surface of the drawer-shaped water tank drawn out from the frame even though the drawer-like water tanks are arranged in a substantially adjacent state in the left-right direction. It can be determined by observing the internal zebrafish. In other words, individual feeding can be realized in a compact space without impairing the visibility of zebrafish.

Each drawer-shaped water tank is individually covered by a lid cover that is individually placed on each drawer-like water tank, so that when the lid plate of one drawer-like water tank is removed, the zebrafish will jump into the adjacent drawer-like water tank. Can be prevented.

Since the water supply mechanism individually supplies water to each drawer-like water tank, the water in one drawer-like water tank does not diffuse into the adjacent drawer-like water tank. As a result, food and medicine mixed in the water in a certain drawer-like water tank will not diffuse into the adjacent drawer-like water tank. Therefore, different feeding conditions can be given to the zebrafish in each drawer-shaped water tank. Each of the effects described above makes it possible to keep a large number of small test fish individually and conveniently.

According to one preferred embodiment, the rectangular pockets of the frame are arranged in the vertical direction as well as in the left-right direction. In other words, a large number of drawer-like water tanks that can be individually slid in the front-rear direction are arranged in the lateral direction and the vertical direction. Thereby, it became possible to accumulate many drawer-like water tanks in a narrow space without degrading the observability. The square pockets can be formed in multiple stages in the vertical direction in an integral frame, or a single stage frame having a plurality of square pockets arranged in the left-right direction can be stacked in a predetermined number of stages in the vertical direction. Good. That is, the frame and each drawer-shaped water tank are formed in a bowl shape.

According to another preferred embodiment, the rear wall portion of the drawer-shaped water tank has a water receiving portion that is obliquely installed to guide water falling from above into the water tank. Thereby, the separate supply of the water of the predetermined flow volume to each drawer-like water tank can be performed simply.

According to another preferred embodiment, the water tank for distributing water is disposed above the water receiving portion of each drawer-shaped water tank in the same stage. Water falls individually to each water receiving part from a water dropping hole provided in each distribution water tank. As a result, the amount of water supplied to each drawer tank can be made equal without complicating the water supply structure.

According to another preferred embodiment, the water dropping hole is constituted by a water dropping cylinder having a height substantially equal to the bottom surface of the distribution water tank. If it does in this way, the amount of falling water to each water receiving part from each water dropping hole can be made constant with a simple mechanism. In other words, the amount of water corresponding to the height of the water dropping cylinder is always held in the distribution water tank. This is because the movement resistance of the water in the horizontal direction in the distribution water tank becomes very small, and the level of the water surface in the distribution water tank does not vary.

According to another preferred embodiment, the distribution water tank has an overflow portion by a predetermined level from the upper end of the water dropping cylinder portion. Thereby, the individual water supply amount to each drawer-like water tank can be made substantially constant with a simple mechanism.

According to another preferred embodiment, the water overflowing from the overflow portion of the upper distribution water tank falls into the distribution water tank immediately below. Thereby, the supply of a substantially fixed amount of water to the drawer-shaped water tanks arranged in multiple stages can be realized with a simple mechanism.

According to another preferred embodiment, the front wall of the drawer-like water tank preferably has a water tank overflow for maintaining the level of the drawer-like water tank at a predetermined level. Thereby, the water level of many drawer-like water tanks can be made constant with a simple mechanism. Furthermore, since the water flow from the basket to the front can be formed in the drawer-shaped water tank, the dust in the drawer-shaped water tank can be discharged to the outside. Naturally, the aquarium overflow portion is formed in a size that does not overflow the zebrafish in the aquarium.

According to another preferred embodiment, the frame is composed of a plurality of stackable frame units, and each frame unit accommodates one-stage drawer-like water tank. The water supply unit also includes a plurality of distribution water tanks that can be stacked. One distribution water tank supplies water to the drawer-shaped water tank for one stage. The frame unit and the water tank for distribution are connected so as to be disassembled in the vertical direction. Thereby, increase / decrease in the number of drawer-like water tanks and cleaning of each part become easy.

According to another preferred embodiment, the plurality of water dropping cylinders hang down from the bottom plate of the distribution water tank, and the plurality of water supply rods are individually fitted to the water dropping cylinders. The water in the distribution water tank is supplied to the drawer-shaped water tank through the gap between the water dropping cylinder and the water supply rod. Due to the vertical movement of the water supply rod, the clogging of the water dropping cylinder portion can be prevented.

According to another preferred embodiment, each water supply rod in one water distribution tank is connected to a common water supply rod holding plate. Thereby, each water dropping cylinder part can be easily cleaned by raising and lowering this water supply rod holding plate.

FIG. 1 is a perspective view showing the overall configuration of the test small fish breeding apparatus. FIG. 2 is a perspective view showing the frame and the water supply unit. FIG. 3 is a perspective view showing one drawer-like water tank. FIG. 4 is a front view of the test small fish breeding apparatus shown in FIG. FIG. 5 is a perspective view of this apparatus. FIG. 6 is a longitudinal sectional view of this apparatus. FIG. 7 is a perspective view showing the breeding unit of the second embodiment. FIG. 8 is a perspective view showing the breeding unit of the second embodiment. FIG. 9 is a perspective view showing the breeding unit of the second embodiment. FIG. 10 is a perspective view showing a three-stage rearing unit. FIG. 11 is a perspective view showing a three-stage rearing unit. FIG. 12 is a perspective view showing a three-stage rearing unit. FIG. 13 is a perspective view showing a distribution water tank. FIG. 14 is a perspective view showing a distribution water tank. FIG. 15 is a cross-sectional view showing the water supply rod connected to the water supply rod holding plate. FIG. 16 is a front view showing the water supply rod holding plate accommodated in the distribution water tank.

First Embodiment A first embodiment of the test small fish breeding apparatus of the present invention will be described with reference to the drawings. Zebrafish is used as a small test fish. However, the present invention should not be construed as being limited to this embodiment, and can be modified without departing from the subject matter of the present invention.

FIG. 1 is a perspective view showing the overall configuration of the test small fish breeding apparatus. This breeding apparatus has 15 drawer-like water tanks 1, a rectangular box-like frame 2 that houses the drawer-like water tank 1, and a water supply unit 5 that is disposed adjacent to the heel side of the frame 2. Each drawer tank 1 contains a zebrafish and a certain amount of water. In order to maintain the cleanliness in each drawer-shaped water tank 1, the water in the rectangular box-shaped water tank is periodically replaced.

FIG. 2 is a perspective view showing the frame 2 and the water supply unit 5. The frame 2 has a total of 15 square pockets 20 arranged in five rows and three columns. As shown in FIG. 1, each square pocket 20 accommodates one drawer-like water tank 1. Each drawer-shaped water tank 1 is supported by the square pocket 20 so that it can slide to the front-back direction (refer FIG. 1).

FIG. 3 is a perspective view showing one drawer-like water tank 1. The drawer-shaped water tank 1 has a front wall part 11, a pair of side wall parts 12 and 13, and a wall part 14 provided around a rectangular bottom part. The upper end opening of the drawer-like water tank 1 is covered with a lid cover 4.

The drawer-shaped water tank 1 has a water receiving portion 15 that is inclined from the upper portion of the ridge wall portion 14 in the upward direction. The water drops that have fallen on the water receiver 15 flow along the slope of the water receiver 15 and are guided into the drawer-like water tank 1.

Furthermore, the drawer-like water tank 1 has a bait throwing portion 16 that is obliquely provided from the upper part of the front wall portion 11 to the front upper direction. The feed or feed water that has fallen on the feed input unit 16 flows along the slope of the feed input unit 16 and is guided into the drawer-like water tank 1.

Furthermore, the drawer-like water tank 1 has a water tank overflow part composed of two pores 18 provided in the upper part of the front wall part 11 and an overflow water guide plate 19 obliquely provided forward and downward from the front wall part 11. 17. The overflow water guide plate 19 provided immediately below the two pores 18 separates the overflow water from the front wall portion 11 so that the overflow water flows again into the lower drawer-like water tank 1 through the lower pores 18. It is preventing.

The water supply mechanism 3 is demonstrated with reference to FIG. 4 thru | or FIG. 4 is a front view of the test small fish breeding apparatus shown in FIG. 1, FIG. 5 is a perspective view of the apparatus, and FIG. 6 is a longitudinal sectional view of the apparatus. This water supply mechanism 3 includes two water supply units 5, two water supply pipes 51 disposed above the water supply unit 5, and two electromagnetic types provided respectively on two drooping pipes 52 that branch downward from the water supply pipe 51. It consists of a manual on-off valve 53. By opening the two on-off valves 53 regularly for a certain period of time, a predetermined amount of water periodically falls from the droop pipe 52 into the upper distribution water tank 6 by a predetermined amount.

The substantially rectangular parallelepiped water supply unit 5 is fixed to the wall of the frame 2 for housing the drawer-like water tank 1. The water supply unit 5 has three distribution water tanks 6 to 8 arranged in the vertical direction. That is, the water supply unit 5 supplies water to the distribution water tank 6 for supplying water to the upper drawer-like water tank 1, the distribution water tank 7 for supplying water to the middle drawer-like water tank 1, and the lower drawer-like water tank 1. And a distribution water tank 8. Each of the distribution water tanks 6 to 8 is integrated by a support plate, and is fixed to the wall of the frame 2 through the support plate.

Each of the distribution water tanks 6 to 8 formed in a long box shape extends in the lateral direction. Accordingly, each of the distribution water tanks 6 to 8 can supply water to the five drawer-shaped water tanks 1 arranged in the horizontal direction. The upper distribution water tank 6 is disposed immediately above the middle distribution water tank 7, and the middle distribution water tank 7 is disposed directly above the lower distribution water tank 8.

The structure of the distribution water tanks 6 to 8 will be described below. Since the distribution tanks 6 to 8 have substantially the same structure, only the distribution tank 6 will be described below. The distribution water tank 6 has one overflow part 9 and five water dropping cylinder parts 10 each comprising a cylindrical part penetrating through the bottom of the distribution water tank 6. The water drop cylinder 10 has a water drop hole for water to drop. Fifteen water dropping cylinder portions 10 are individually arranged directly above the fifteen water receiving portions 15.

The upper end of the overflow part 9 is erected up to a predetermined height from the bottom surface of the distribution water tank 6, and the upper end of the water dropping cylinder part 10 also protrudes slightly upward from the bottom surface of the distribution water tank 6. Thereby, the minimum water level of the water tank 6 for distribution is prescribed | regulated, and the fluidity | liquidity to the horizontal direction of the water in the water tank 6 for distribution is ensured. As a result, the water level of each part in the distribution water tank 6 is always constant, and if the heights of the five water drop cylinder parts 10 in the distribution water tank 6 are equal, the water tank 6 for distribution enters the respective water drop cylinder parts 10. The amount of overflowing water is almost equal.

The upper end of the tubular overflow part 9 is formed higher than the upper end of the water dropping cylinder part 10, and the diameter of the overflow part 9 is much larger than the diameter of the water dropping cylinder part 10. Therefore, when the on-off valve 53 is opened for a predetermined time, the water dropped from the drooping pipe 52 is stored in the upper distribution water tank 6 to the height of the overflow part 9 and then passes through the overflow part 9 of the distribution water tank 6. It falls into the middle distribution water tank 7. Next, water is stored in the middle distribution tank 7 up to the height of the overflow portion 9. After that, it falls to the lower distribution water tank 8 through the overflow portion 9 of the middle distribution water tank 7. Next, the water is stored in the lower distribution water tank 8 up to the height of the overflow portion 9, and then falls to the water recovery device (not shown) through the overflow portion 9 of the lower distribution water tank 8.

Since the overflow portion 9 has a large diameter, the water drop required until the overflow portion 9 of the lower distribution water tank 8 starts to overflow from the start of the water drop to the upper distribution water tank 6. The time is short. For this reason, the time required to store a predetermined amount of water in each of the distribution water tanks 6 to 8 is short, and the amount of water supplied to each drawer-like water tank 1 through each water dropping cylinder portion 10 during this period is short. The difference is small.

The water in each of the distribution water tanks 6 to 8 stored up to the height of the overflow section 9 falls individually into each drawer-shaped water tank 1 through a total of 15 water dropping cylinder sections 10. Since the diameters of all the water dropping cylinders 10 are equal, an approximately equal amount of water is supplied to each drawer-like water tank 1. This supply of water ends when the water level in the distribution water tanks 6 to 8 reaches the height of the water dropping cylinder 10.

The water overflowing from the pores 18 of each drawer-shaped water tank 1 falls downward through the overflow water guide plate 19. Therefore, each drawer-like water tank 1 maintains the water level defined by the lower end of the pores 18. Since each drawer-shaped water tank 1 has the bait input part 16 separately, the feed amount given to the zebrafish in each drawer-shaped water tank 1 can be controlled individually.

According to this apparatus, a total of 15 zebrafish are individually housed in each drawer-shaped water tank 1 for a predetermined period. By pulling out the drawer-like water tank 1, each zebrafish is individually observed or photographed from above and from the side.

Variations are described below. The lid cover 4 can be held on the upper surface of the drawer-like water tank 1 so as to be slidable in the front-rear direction, for example. At least the wall portion of the drawer-shaped water tank 1 is formed of a transparent resin of acrylic resin. A light-transmitting film having an antibacterial effect may be coated on at least the inner surface of the drawer-shaped water tank 1.

The drawer-like water tank 1 can be partitioned into a plurality of small chambers in the depth direction by a partition wall. Zebrafish are housed individually in each compartment. Water can be supplied to each small chamber through, for example, a hole opened in the lid cover. The overflow water from each small chamber can be discharged from the upper part of the side wall of the drawer-like water tank 1 to the outside. The overflow can be carried out by removing the cover 4 placed on the drawer-like water tank 1 drawn forward or through a hole provided in the cover 4. In order to prevent zebrafish from jumping into adjacent chambers, it is important that the lid cover is divided into each chamber.

Second Embodiment A second embodiment of the test small fish breeding apparatus of the present invention will be described with reference to the drawings. The apparatus of this embodiment is essentially the same as the apparatus of the first embodiment described above except for some contrivances. The biggest difference is that the breeding apparatus of this embodiment is configured by stacking a plurality of breeding units in the height direction. As a result, by changing the number of stacked stages, it is possible to appropriately change the breeding number without increasing the horizontal projection area necessary for installation.

A one-stage rearing unit 100 will be described with reference to FIGS. The breeding unit 100 includes five drawer-like water tanks 1, a single-stage frame unit 22 that accommodates them in a horizontal row, and a single-stage distribution water tank 25 arranged adjacent to the frame unit 22. . The drawer-like water tank 1 is essentially the same as the drawer-like water tank 1 of the first embodiment. Similarly, the distribution water tank 25 is essentially the same as the distribution water tank of the first embodiment.

The frame unit 22 includes six side plates 221-226, one bottom plate 227 and a top plate 228. Each side plate is erected on the bottom plate at a predetermined interval from each other, and supports the top plate. Thereby, the frame unit 22 has five spaces for individually accommodating the five drawer-like water tanks 1. Out of the six side plates 221-226, the outer side plates 221 and 226, which are side plates on both the left and right ends, protrude rearward to support the distribution water tank 25.

Further, each of the six side plates 221 to 226 protrudes forward from the bottom plate and the top plate in order to guide the overflow water. Slits 220 for guiding the overflow water are obliquely provided at the front projecting portions of these side plates 221-226. The water overflowing from the pores 18 of each drawer-shaped water tank 1 falls to the upper side of the slit 220 by the overflow water guide plate 19, and then falls after reaching the front end of the side plate 221-226 along the slit 220. The falling overflow water is guided to a drainage device (not shown). Thereby, when the predetermined drawer-like water tank 1 is attached to and detached from the frame unit 22, the overflow water of the upper drawer-like water tank 1 is prevented from flowing into the predetermined drawer-like water tank 1. Each drawer-like water tank 1 maintains the water level defined by the lower end of the overflow pores 18. Each drawer-shaped water tank 1 has the bait input part 16 which consists of a hole part separately.

The distribution water tank 25 is disposed adjacent to the rear side surface of the frame unit 22. The distribution water tank 25 formed of a rectangular box having a long upper end opening is supported by the pair of outer plates 221 and 226 of the frame unit 22 so as to be vertically slidable. Both left and right ends of the distribution water tank 25 have protrusions 250 that protrude downward, and the protrusions 250 are fitted to protrusions 252 that protrude upward from the upper ends of the outer plates 221 and 226. Thereby, the distribution water tank 25 is supported so as to be slidable only upward with respect to the frame unit 22.

The distribution water tank 25 is held at a predetermined height with respect to the frame unit 22 for water supply. FIG. 7 is a perspective view of the state before the distribution water tank 25 is fixed to the frame unit 22 as viewed from obliquely above. FIG. 8 is a perspective view of the state after the distribution water tank 25 is fixed to the frame unit 22 as viewed from obliquely above. FIG. 9 is a perspective view of the first-stage rearing unit 100 as viewed from obliquely below.

The stacked state of the three-stage rearing unit 100 will be described with reference to FIGS. 10 and 11. In FIG. 10, the one-stage rearing unit 100 is positioned above the two-stage rearing unit 100 that has already been stacked. In FIG. 11, three-stage rearing units 100 are stacked. The side wall 222-225 of the frame unit 22 has a lower protrusion 229 that protrudes downward from the bottom plate 227 of the frame unit 22. These lower protrusions 229 are placed on the upper ends of the side walls 222-225 of the frame unit 22 directly below through slits 230 provided on the top plate 228 of the frame unit 22 directly below. Similarly, the side walls 221 and 226 of the frame unit 22 are directly placed on the upper ends of the side walls 221 and 226 of the frame unit 22 directly below.

The distribution water tank 25 will be described with reference to FIGS. FIG. 12 is a perspective view showing a state where the three-tiered rearing unit 10 is looked up from the lower rear side. The distribution water tanks 25 stacked in three stages constitute the water supply unit referred to in the present invention. A long rectangular box-shaped distribution water tank 25 having an open upper end is supported on the rear part of the frame unit 22 so as to be slidable up and down. The bottom plate 251 of the distribution water tank 25 is positioned higher than the drawer-shaped water tank 1 accommodated in the frame unit 22.

Details of the distribution water tank 25 will be described with reference to FIGS. 13 and 14. FIG. 13 is a perspective view of the distribution water tank 25 as viewed from obliquely above, and FIG. 14 is a perspective view of the distribution water tank 25 as viewed from obliquely below. The bottom plate 251 of the distribution water tank 25 has two overflow holes 90 that penetrate the bottom of the distribution water tank 25. One overflow cylinder 91 is suspended from one of the two holes 90. The remaining one hole 90 is sealed with a rubber stopper (not shown).

As shown in FIG. 12, the overflow cylindrical portion 91 of the first-stage and third-stage distribution water tanks 25 is provided at a position opposite to the overflow cylinder 91 of the second-stage distribution water tank 25. ing. Thereby, the dispersion | variation in the water level of the water tank 25 for distribution can be reduced. The cylinder portion 91 corresponds to the overflow portion referred to in the first embodiment. The water falling from the cylindrical portion 91 of the first-stage distribution water tank 25, which is the lowest level, is drained to a drain device (not shown). The third-stage distribution water tank 25 which is the uppermost stage is supplied with water from a water supply device (not shown).

Further, the bottom plate 251 of the distribution water tank 25 has five holes into which the five water dropping cylinder portions 10 are individually press-fitted. Each of the water dropping cylinders 10 is individually located immediately above the five water receiving parts 15 of the drawer-like water tank 1. Thereby, the amount of water supplied from the distribution water tank 25 to each drawer-shaped water tank 1 can be adjusted appropriately. Preferably, an equal amount of water is supplied to each drawer-shaped water tank 1. Further, when the drawer-like water tank 1 is not attached to the frame unit 22, the water dropped from the water dropping cylinder portion 10 is collected by the distribution water tank 25 immediately below.

FIG. 15 is an enlarged cross-sectional view showing the water dropping cylinder portion 10. The water supply rod 101 penetrates the water dropping cylinder portion 10. Water falls through a gap between the water dropping cylinder 10 and the water supply rod 101. The amount of falling water is adjusted by changing the diameter of the water supply rod 101 or by adjusting the water level of the distribution water tank 25. The top of the water supply rod 101 is fixed to an engaging portion 102 that protrudes in the lateral direction. The engaging portion 102 is loosely fitted in the square hole portion 201 of the water supply rod holding plate 200 accommodated in the distribution water tank 25.

FIG. 16 is a cross-sectional view of the distribution water tank 25. However, illustration of the overflow hole 90, the cylinder 91, and the rubber plug is omitted. The water supply rod holding plate 200 extends in the longitudinal direction of the distribution water tank 25. The water supply rod holding plate 200 has five square hole portions 201. Two handle portions 202 are individually provided at both ends of the water supply rod holding plate 200. These handle portions 202 are fitted in a guide groove 253 provided in the upper portion of the side wall of the distribution water tank 25 so as to be vertically slidable. As a result, by sliding the water supply rod holding plate 200 up and down, each water supply rod 101 can individually move up and down in each water dropping cylinder portion 10. Thereby, the water clogging in the water dropping cylinder part 10 by a small foreign material etc. can be prevented. Furthermore, since the water supply rod holding plate 200 can be easily removed from the distribution water tank 25, the water supply rod holding plate 200 and the water supply rod 101 can be easily cleaned. Other structures and functions are essentially the same as in the first embodiment.

The effects of the feeding device of the present invention will be described below. First, it is possible to observe and judge from the side of all zebrafish while keeping a large number of zebrafish in a compact space. This is a very important point in this type of device. Next, since each drawer-shaped water tank 1 is covered with a separate lid cover, even when the lid cover is removed, the zebrafish does not jump into the adjacent zebrafish accommodation space and invalidate the test results.

According to this embodiment, independent quantitative water supply to the numerous drawer-like water tanks 1 arranged in the lateral direction and the vertical direction can be realized with a simple mechanism. Furthermore, it is possible to prevent the feed or medicine separately administered to each drawer-like water tank 1 from diffusing into the adjacent drawer-like water tank 1.

In the said Example, operation of each drawer-like water tank 1 is performed manually. However, when this apparatus is scaled up, the number of drawer-like water tanks 1 based on the pull-out of each drawer-like water tank 1, the imaging and image determination of zebrafish in the drawn-out water tank 1, and the determination result Of course, storage or display may be automatically performed. Furthermore, it is possible to automate the drawer operation of the drawer-like water tank 1 determined based on the determination result.

Claims (17)

A large number of drawer-shaped aquariums arranged in the horizontal direction, each containing a small test fish,
A lid cover for individually covering the upper end opening of each of the drawer-like water tanks;
A frame that supports each drawer-like water tank so that it can be individually pulled out forward;
A water supply unit that individually supplies water to each drawer-shaped water tank,
A small fish breeding apparatus for testing, wherein at least a side wall portion of the drawer-shaped water tank is formed of a transparent resin.   2. The test small fish breeding apparatus according to claim 1, wherein the frame supports the drawer-like water tanks in a vertical direction in multiple stages so that the drawer-like water tanks can be individually slid forward.   3. The test small fish breeding apparatus according to claim 2, wherein the rear wall portion of the drawer-shaped water tank has a water receiving portion provided obliquely for guiding water falling from above into the drawer-shaped water tank. The water supply unit has a distribution water tank that is positioned above the water receiving portion of each drawer-shaped water tank in the same stage and extends in a substantially horizontal direction,
The test according to claim 3, wherein the distribution water tank has a plurality of water dropping holes that are formed immediately above the water receiving parts of the drawer-like water tanks in the same stage and allow water to drip into the water receiving parts. Small fish breeding equipment.   5. The test small fish breeding apparatus according to claim 4, wherein the water dropping hole is provided in a water dropping cylinder portion standing by a predetermined height from a bottom surface of the distribution water tank. The distribution water tank has an overflow part for maintaining the water level in the distribution water tank higher by a predetermined level than the upper end of the water dropping cylinder part,
The overflow section provided in the first distribution water tank for supplying water to each drawer-shaped water tank on a predetermined floor supplies water to each drawer-shaped water tank located directly below the predetermined floor. 6. The test small fish breeding apparatus according to claim 5, wherein water is allowed to overflow into the second distribution tank.   4. The test small fish breeding apparatus according to claim 3, wherein the wall portion of the drawer-shaped water tank has a water tank overflow section for maintaining the water level of the drawer-shaped water tank at a predetermined level.   The test fish rearing apparatus according to claim 7, wherein the aquarium overflow portion projects from a front wall portion of the drawer-shaped aquarium. A frame in which a large number of pockets each extending in the front-rear direction are arranged in the horizontal direction and the height direction;
A number of drawer-like water tanks for accommodating small test fishes that are individually accommodated in the respective pockets so as to be slidable in the front-rear direction;
A water supply unit disposed adjacent to the frame and supplying water individually to each of the drawer-like water tanks,
Each of the drawer-like water tanks has a water receiving part for receiving water from the water supply unit and a water tank overflow part for overflowing the water in the drawer-like water tank to the outside.   The apparatus for raising a test small fish according to claim 9, wherein each of the water receiving portions protrudes from the back wall portion of the drawer-shaped water tank toward the water supply unit. The water supply mechanism has a distribution water tank that is positioned above the water receiving portion of each drawer-shaped water tank in the same stage and extends in a substantially horizontal direction,
The test according to claim 10, wherein the distribution water tank has a plurality of water dropping holes that are formed immediately above the water receiving parts of the drawer-like water tanks in the same stage and allow water to drip into the water receiving parts. Small fish breeding equipment.   12. The test small fish breeding apparatus according to claim 11, wherein the water dropping hole is provided in a water dropping cylinder portion erected by a predetermined height from a bottom surface of the distributing water tank. The distribution water tank has a dish overflow part for raising the water level in the distribution water tank by a predetermined level higher than the upper end of the water dropping cylinder part,
The dish overflow portion provided in the first distribution water tank for supplying water to the drawer-like water tanks on a predetermined floor supplies water to the drawer-like water tanks located immediately below the predetermined floor. The apparatus for raising a test small fish according to claim 12, wherein water is allowed to overflow into the second distribution water tank.   10. The test small fish breeding apparatus according to claim 9, wherein the aquarium overflow portion is projected from a front wall portion of the drawer-shaped aquarium. A frame in which a large number of pockets each extending in the front-rear direction are arranged in the horizontal direction and the height direction;
A number of drawer-like water tanks for accommodating small test fishes that are individually accommodated in the respective pockets so as to be slidable in the front-rear direction;
A water supply unit disposed adjacent to the frame and supplying water individually to each of the drawer-like water tanks,
The frame includes a plurality of frame units (22) stacked so as to be slidable in the vertical direction,
Each of the water supply units comprises a distribution water tank (25) slidably stacked in the vertical direction,
The distribution water tank (25) is separated from the bottom plate (251) of the distribution water tank (25) in order to individually supply water to the plurality of drawer-shaped water tanks (1) accommodated in the same frame unit (22). A test small fish breeding apparatus comprising a plurality of water dropping cylinders (10) depending downward and a plurality of water supply rods (101) penetrating the water dropping cylinders (10) individually. .   16. The test small fish breeding apparatus according to claim 15, wherein the distribution water tank (25) supports a water supply rod holding plate (200) engaged with tops of the plurality of water supply rods (101) so as to be slidable up and down.   The distribution water tank (25) has an overflow cylinder portion (91) erected on the bottom plate (251) of the distribution water tank (25), and overflowed from the overflow tube section (91). 16. The test small fish breeding apparatus according to claim 15, wherein the water is supplied to a distribution water tank (25) immediately below.