Juvenile zebra fish breeding device

Abstract

The utility model provides a zebra fish juvenile fish culture device which comprises an outer tank, a water circulation channel communicated with the outside is formed in the inner bottom of the outer tank, circulating water and dirt can enter the water circulation channel to be discharged outwards, an installation hole is formed in an inlet of the water circulation channel, a center pipe is detachably installed at the position of the installation hole, and the center pipe is connected with the water circulation channel. The upper end of the central pipe is connected with a filter screen, and when the water level rises, water can enter the central pipe from the upper end of the central pipe and is led out through the water circulation channel; according to the utility model, the suitable liquid level height in the young fish opening stage can be limited, so that as many young fishes as possible can float upwards and can eat the opening feed floating on the water surface; the outer tank is of a barrel structure, and rotation of flowing water is more beneficial for food residues or fish feces to be gathered towards the center and finally discharged in time. The bottom of the outer cylinder is designed to be of a punching stainless steel screen plate structure and is not prone to rusting and dirt hanging, and water circulation is thorough.

Description

Technical Field

[0001] The utility model relates to the technical field of fish farming, in particular to a larval zebrafish cultivator. Background Art

[0002] Zebrafish are vertebrate model animals. Because they have advantages such as similar genes to humans, short breeding cycles, external growth, and transparent embryos and larvae throughout the body, they have been one of the important research objects of life scientists in the past few decades and have very important research value in the directions of biological genetics, developmental biology, toxicology, etc. The breeding of laboratory zebrafish is the basis for the operation of the zebrafish experimental animal platform, and the feeding management during the larval stage of zebrafish is a relatively critical and technically demanding stage in the zebrafish breeding process. How to improve the survival rate of seedlings, ensure the growth rate and survival quality of larvae, and be easy to operate, manage and maintain are the key technical requirements for the design of fry feeding utensils at this stage.

[0003] Currently, there are the following types of larval feeding utensils on the market:

[0004] Use a dedicated 3L zebrafish breeding tank to raise seedlings. In this feeding method, fish-raising water is added to the 3L fish tank, the water level is 2 - 3 cm, a 50-mesh screen is inserted, and 5 - 6 dpf larvae are transferred into the 3L fish tank. The feeding density is about 50 larvae per tank. Place the fish tank in a dedicated larval culture area for static water culture. Add a small amount of fresh water every day to maintain the water quality. Open the small water valve around 10 dpf, and the water flow should be in the form of water droplets and not too large. After 15 dpf, start adjusting the small water valve for flowing water. Feeding method: Feed the larvae three times a day from 6 - 14 dpf; the feeding amount for each fish tank is based on a thin layer formed after the feed is scattered covering 1 / 3 of the water surface, and about 5 mg of microencapsulated feed is fed per tank. Start trying to feed Artemia nauplii at 10 dpf. Feed Artemia nauplii in the morning, middle, and evening from 15 - 30 dpf, 0.5 mL each time. During the feeding period, manage in time to suck out the waste and residue at the bottom of the fish tank. Transfer the fish in the 3L tank to a 10L tank for feeding at 30 dpf.

[0005] Another one is that a cylindrical cylinder structure is used as the outer cylinder. A layer of 50-mesh stainless steel screen is fixed at one cross-section of the 11-cm diameter barrel-shaped structure. When in use, the inner cylinder is sleeved inside the outer cylinder, about 600 - 700 ml of fish-raising water is added, and about 60 seedlings are put in. Feed microencapsulated feed or Paramecium feed every day. Regarding water quality maintenance, it is necessary to change water regularly. Lift the inner cylinder and sink it into another newly cleaned outer cylinder that has been filled with an appropriate amount of fish-raising water, and then clean and disinfect the replaced outer cylinder. The whole feeding tank is placed in a constant-temperature breeding laboratory or a constant-temperature incubator for cultivation.

[0006] The above two juvenile fish breeding modes can currently achieve the breeding of zebrafish in the seedling stage, but there are certain disadvantages in actual operation. The overall operation of the first mode requires high practical operation ability of the breeding experimenter. The water level adjustment, water change frequency, water quality maintenance, and the environment maintenance in the breeding tank are relatively strict. Once the operation is not rigorous or the process is slightly negligent, it will directly affect the survival rate, growth rate and quality of the seedlings. The second type of seedling breeding equipment requires manual regular and timely water changes during actual use to barely maintain the water quality. The bottom filter is easy to get dirty and difficult to clean. The process of pouring out the seedlings and replacing the equipment can easily cause mechanical damage to the seedlings, resulting in stress reactions or even death. The survival rate of the seedlings is not high in actual use. Utility Model Content

[0007] The utility model provides a zebrafish fry culture device to solve the problems of the existing zebrafish fry culture devices proposed in the above background technology, such as high requirements on the operation ability of the culture experimenter, the bottom filter is dirty and difficult to clean, and it is easy to cause mechanical damage or even death of the seedlings, and the survival rate of the seedlings is not high.

[0008] The technical solution of the utility model is achieved in this way:

[0009] A zebrafish fry culture device comprises an outer cylinder, wherein the inner bottom of the outer cylinder is provided with a water circulation channel connected to the outside, and circulating water and dirt can enter the water circulation channel and be discharged outwardly; an installation hole is provided at the entrance of the water circulation channel, and a central tube is detachably installed at the position of the installation hole; a filter screen is connected to the upper end of the central tube; when the water level rises, water can enter the interior of the central tube from the upper end of the central tube and be discharged outwardly through the water circulation channel.

[0010] Preferably, the central tube is installed at the mounting hole by means of plug-in connection.

[0011] Preferably, the central tube is a first central tube, the upper end of the first central tube is connected to a first filter screen, the upper end of the first central tube is also connected to an inner cylinder, and the lower end of the inner cylinder is installed with a first mesh plate. When the first central tube is connected to the mounting hole, the inner cylinder is in the center position of the outer cylinder, and the water inside the outer cylinder can enter the inner cylinder through the mesh holes of the first mesh plate, and finally pass through the first filter screen into the first central tube.

[0012] Preferably, the mesh size of the first mesh plate is φ0.5 mm.

[0013] Preferably, the center tube is a second center tube, a second filter screen is connected to the upper end of the second center tube, and a plurality of drainage holes are opened on the outer wall of the second center tube near the lower end. When the second center tube is installed in the mounting hole, the drainage holes are located above the mounting hole.

[0014] Preferably, a conical bottom plate is provided at the inner bottom of the outer cylinder, the diameter of the conical bottom plate decreases successively from top to bottom, and the mounting hole is located at the center of the conical bottom plate.

[0015] Preferably, a second mesh plate is installed inside the outer cylinder, the second mesh plate is located above the conical bottom plate, a sewage collection cavity is formed between the second mesh plate and the conical bottom plate, and the sewage collection cavity is communicated with the sewage discharge hole at the outer wall of the second central pipe.

[0016] Preferably, the aperture of the mesh holes of the second mesh plate is φ0.8mm.

[0017] Preferably, a tail discharge pipe is connected to the outer end of the water circulation channel.

[0018] Preferably, both the outer cylinder and the central pipe are made of integrally injection-molded PC material.

[0019] By adopting the above technical solutions, the beneficial effects of the present utility model are as follows:

[0020] 1. The present utility model can limit the appropriate liquid level height in the seedling opening stage, which is beneficial for as many fry as possible to float up and be able to feed on the floating starter feed on the water surface.

[0021] 2. The outer cylinder of the present utility model is of a cylindrical structure, and the flowing water rotates more conducive to the convergence of food residues or fish feces towards the center direction, and is finally discharged in time.

[0022] 3. The bottom of the outer cylinder of the present utility model is designed as a punched stainless steel mesh plate structure, which is not easy to rust and is not easy to get dirty, and the water circulation is transparent.

[0023] 4. The present utility model can make the water circulation flow direction in the seedling floating feeding stage be from bottom to top, and the upward flowing water has an auxiliary effect on the floating feeding of fry.

[0024] 5. The conical structure design at the bottom of the outer cylinder of the present utility model can make the water circulation effect more ideal, and can wash away the vast majority of excess food residues in time to keep the environment in the breeding cylinder clean.

[0025] 6. The outer cylinder material of the present utility model is made of integrally injection-molded PC material, which has the characteristics of high temperature resistance, corrosion resistance and impact resistance, can withstand high temperature disinfection, the components are easy to disassemble, and the assembly is convenient, thus being easy to clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model, and for those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.

[0027] Figure 1 is a schematic structural diagram of the present utility model;

[0028] Figure 2 is a structural diagram of the connection between the outer cylinder and the first central tube of the present utility model;

[0029] Figure 3 is a structural diagram of the connection between the outer cylinder and the second central tube of the present utility model.

[0030] Wherein:

[0031] 1. Outer cylinder; 2. Inner cylinder; 3. First mesh plate; 4. First central tube; 5. Second filter screen; 6. Second central tube; 7. Drain hole; 8. Second mesh plate; 9. Conical bottom plate; 10. Sewage collection cavity; 11. Mounting hole; 12. Water circulation channel; 13. Tail drain pipe; 14. First filter screen. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0033] As shown in the figure, a zebrafish fry cultivator includes an outer cylinder 1. A water circulation channel 12 communicating with the outside is opened at the inner bottom of the outer cylinder 1. The outer end of the water circulation channel 12 is connected with a tail drain pipe 13. Circulating water and dirt can enter the water circulation channel 12 and be discharged outward. That is, the tail drain pipe 13 can be connected to an external water pump and filter to realize water circulation.

[0034] An installation hole 11 is provided at the entrance of the water circulation channel 12. Among them, the center line of the installation hole 11 coincides with the center line of the outer cylinder 1. A central tube is detachably installed at the position of the installation hole 11. Specifically, the central tube is installed at the installation hole 11 by means of insertion connection, that is, the central tube is connected to the outer cylinder 1 by means of plugging and unplugging; a filter screen is connected to the upper end of the central tube. When the water level rises, water can enter the inside of the central tube from the upper end of the central tube and be led out through the water circulation channel 12.

[0035] Specifically, the central tube is the first central tube 4. A first filter screen 14 is connected to the upper end of the first central tube 4. The upper end of the first central tube 4 is also connected to an inner cylinder 2. A first mesh plate 3 is installed at the lower end of the inner cylinder 2. The first central tube 4 and the first mesh plate 3 are fixedly connected. When the first central tube 4 is connected to the installation hole 11, the inner cylinder 2 is located at the central position of the outer cylinder 1, and the water inside the outer cylinder 1 can enter the inner cylinder 2 through the mesh holes of the first mesh plate 3 and finally pass through the first filter screen 14 and enter the inside of the first central tube 4.

[0036] Among them, when the central tube is the first central tube 4, that is, the inner cylinder 2 is located inside the outer cylinder 1, which is mainly used for raising zebrafish fry. In actual use, fry aged 5 - 16 days can be raised inside the inner cylinder 2. The inner cylinder 2 together with the first central tube 4 is inserted into the installation hole 11 of the outer cylinder 1 to form a combination. The water inlet pipe of the outer cylinder 1 is inserted between the inner and outer cylinders 1. The new water first enters the outer cylinder 1, then enters the inner cylinder 2 through the first mesh plate 3 at the bottom of the inner cylinder 2, then passes through the filter screen 5 and enters the inside of the first central tube 4, and finally enters the water circulation channel 12 and is discharged through the tail drain pipe 13 and enters the main circulation system to complete the water circulation.

[0037] Among them, the aperture of the mesh holes of the first mesh plate 3 is φ0.5mm. In practice, mesh plates with other apertures can also be selected according to the size of the fry.

[0038] In another embodiment, the central tube is the second central tube 6. A second filter screen 5 is connected to the upper end of the second central tube 6. A number of sewage discharge holes 7 are provided at the outer wall position near the lower end of the second central tube 6. When the second central tube 6 is installed into the installation hole 11, the sewage discharge holes 7 are located above the installation hole 11.

[0039] Specifically, a conical bottom plate 9 is provided at the inner bottom of the outer cylinder 1. The diameter of the conical bottom plate 9 decreases successively from top to bottom. The installation hole 11 is located at the central position of the conical bottom plate 9. More specifically, a second mesh plate 8 is installed inside the outer cylinder 1. The second mesh plate 8 is located above the conical bottom plate 9. When the second mesh plate 8 is installed, it can contact the inner wall of the outer cylinder 1 and is installed above the conical bottom plate 9 of the outer cylinder 1 by means of friction. When the first central tube 4 is installed inside the outer cylinder 1, the second mesh plate 8 is in a disassembled state. A sewage collection cavity 10 is formed between the second mesh plate 8 and the conical bottom plate 9. The sewage collection cavity 10 is communicated with the sewage discharge holes 7 at the outer wall of the second central tube 6. The purpose of such a setting is that dirt can pass through the mesh holes of the second mesh plate 8 and enter the sewage collection cavity 10. At this time, the dirt can enter the inside of the second central tube 6 through the sewage discharge holes 7 and enter the main circulation system along with the water flow.

[0040] Among them, the aperture of the mesh holes of the second mesh plate 8 is φ0.8mm. Similarly, mesh plates with other apertures can also be selected according to the size of the young fish.

[0041] This structure with the second central tube 6 inserted into the outer cylinder 1 is mainly used for raising juvenile fish. Specifically, it is used for raising juvenile fish aged 17 - 30 days. The sewage collection chamber 10 at the bottom of the outer cylinder 1 is used for sewage collection. When raising juvenile fish, the inner cylinder 2 together with the first central tube 4 is taken out, and the second central tube 6 is inserted into the mounting hole 11. The water flow direction at the water inlet of the outer cylinder 1 is injected along the tangent direction of the circular cylinder body, which can make the dirt in the outer cylinder 1 rotate and sink with the water flow, sink through the second mesh plate 8, and sink into the conical bottom of the outer cylinder 1. The rotating water flow in the outer cylinder 1 is conducive to the concentration of dirt towards the center of the cone, and finally is discharged through the tail drain pipe 13 at the bottom of the outer cylinder 1 and enters the main circulation system to complete the water circulation.

[0042] Among them, the second central tube 6 also has the function of overflow. During normal circulation, the bottom dirt is discharged through the sewage discharge hole 7 at the bottom of the second central tube 6 with the water flow. When there is abnormal blockage at the bottom, the water level in the outer cylinder 1 rises, and the circulating water overflows from the top filter screen 5 of the second central tube 6, flows into the inside of the second central tube 6 and is discharged, preventing the loss of juvenile fish due to water overflow caused by poor bottom drainage.

[0043] The outer cylinder 1 and the central tube are both made of integrally injection-molded PC (polycarbonate) material, which has the characteristics of high temperature resistance, corrosion resistance, and impact resistance, and can achieve the effects of high-temperature disinfection, quick disassembly and assembly, and cleaning.

[0044] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A zebrafish fry culture device, characterized in that: The invention comprises an outer cylinder (1), wherein the inner bottom of the outer cylinder (1) is provided with a water circulation channel (12) connected to the outside, and circulating water and dirt can enter the water circulation channel (12) and be discharged outwardly. The entrance of the water circulation channel (12) is provided with a mounting hole (11), and a central tube is detachably mounted at the mounting hole (11). The upper end of the central tube is connected to a filter screen. When the water level rises, water can enter the interior of the central tube from the upper end of the central tube and be discharged outwardly through the water circulation channel (12).

2. A zebrafish fry culture device according to claim 1, characterized in that: The central tube is installed at the installation hole (11) by means of plug-in connection.

3. A zebrafish fry culture device according to claim 1, characterized in that: The central tube is a first central tube (4), the upper end of the first central tube (4) is connected to a first filter screen (14), the upper end of the first central tube (4) is also connected to an inner cylinder (2), and the lower end of the inner cylinder (2) is installed with a first mesh plate (3); when the first central tube (4) is connected to the installation hole (11), the inner cylinder (2) is located at the center position of the outer cylinder (1), and water inside the outer cylinder (1) can enter the inner cylinder (2) through the mesh holes of the first mesh plate (3), and finally pass through the first filter screen (14) to enter the first central tube (4).

4. A zebrafish fry culture device according to claim 3, characterized in that: The mesh size of the first mesh plate (3) is φ0.5 mm.

5. The zebrafish fry culture device according to claim 1, characterized in that: The central tube is a second central tube (6), the upper end of the second central tube (6) is connected to a second filter screen (5), and a plurality of drainage holes (7) are provided on the outer wall of the second central tube (6) near the lower end. When the second central tube (6) is installed in the installation hole (11), the drainage holes (7) are located above the installation hole (11).

6. A zebrafish fry culture device according to claim 5, characterized in that: The inner bottom of the outer cylinder (1) is provided with a conical bottom plate (9), the diameter of the conical bottom plate (9) decreases from top to bottom, and the mounting hole (11) is located at the center of the conical bottom plate (9).

7. A zebrafish fry culture device according to claim 6, characterized in that: A second mesh plate (8) is installed inside the outer cylinder (1), and the second mesh plate (8) is located above the conical bottom plate (9). A sewage collecting chamber (10) is formed between the second mesh plate (8) and the conical bottom plate (9), and the sewage collecting chamber (10) is connected to a sewage discharge hole (7) on the outer wall of the second central tube (6).

8. A zebrafish fry culture device according to claim 7, characterized in that: The mesh size of the second mesh plate (8) is φ0.8 mm.

9. The zebrafish fry culture device according to claim 1, characterized in that: The outer end of the water circulation channel (12) is connected to a tail pipe (13).

10. The zebrafish fry culture device according to claim 1, characterized in that: The outer cylinder (1) and the center tube are both made of integral injection-molded PC material.

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