Detection device for ovarian maturity of female tilapia mossambica

Abstract

The utility model discloses a detection device for ovarian maturity of female tilapia, which relates to the technical field of tilapia cultivation and comprises a measuring box, a piston cylinder, a piston bolt and a water adding mechanism, a sample inlet is arranged on the lateral portion of the measuring box, one end of the piston cylinder is communicated with the sample inlet, and the other end of the piston cylinder is movably connected with the piston bolt. A fish adding opening and a water adding opening are formed in the piston barrel, the water adding opening is communicated with the water adding mechanism, and the water adding mechanism can add water into the piston barrel and measure the volume of the added water; the piston bolt can push the female tilapia mossambica to be detected and water in the piston cylinder into the measuring box and seal the sample inlet; a water measuring pipe is arranged at the top of the measuring box and is used for measuring the total volume of the to-be-measured female tilapia and water in the measuring box, so that the volume of the to-be-measured female tilapia is obtained, and the ovarian maturity of the to-be-measured female tilapia is judged according to the ratio of the body length to the volume of the to-be-measured female tilapia. The device can effectively detect whether ovaries of female tilapia mossambica are mature or not, and the purpose of accurate and efficient breeding is achieved.

Description

Technical Field

[0001] This utility model relates to the field of tilapia farming technology, and in particular to a device for detecting the ovarian maturity of female tilapia. Background Technology

[0002] Tilapia farming offers high economic benefits. Tilapia are tolerant of salinity and high temperatures, allowing them to thrive in a variety of environments, resulting in low farming costs. They are also highly adaptable to different environments, preferring higher water temperatures and exhibiting greater tolerance to low oxygen levels than most carp. These characteristics enable tilapia to grow in diverse conditions, further expanding their farming scope and adaptability.

[0003] China is a major tilapia farming country, with a tilapia fry production of 20.6 billion fry and a marketable tilapia production of 1.6554 million tons in 2020. Tilapia reproduce in batches during the breeding season, unlike the four major freshwater fish species which mate and spawn all at once. Furthermore, the relative and absolute egg-bearing capacities of female tilapia are more than 10 orders of magnitude lower than those of common fish. Typically, each female spawns four times a year, producing a total of about 3,000 eggs. If the gonads are not well-developed, the egg production will be even lower or non-existent, which will have a significant negative impact on tilapia fry production.

[0004] It is evident that determining the maturity of the gonads in female tilapia is crucial for reproductive production. Normally, one can observe whether the abdomen is swollen with the naked eye. However, female tilapia carry a small number of eggs, and minor differences are difficult to distinguish with the naked eye, making it difficult to determine whether the ovaries of female tilapia are mature. Utility Model Content

[0005] The purpose of this invention is to provide a device for detecting the maturity of female tilapia ovaries, in order to solve the problems existing in the above-mentioned related technologies, and to effectively detect whether the ovaries of female tilapia are mature, so as to achieve the purpose of accurate and efficient breeding.

[0006] To achieve the above objectives, this utility model provides the following solution:

[0007] This invention provides a device for detecting the ovarian maturity of female tilapia, comprising a measuring chamber, a piston cylinder, a piston plug, and a water-adding mechanism. The measuring chamber has a sample inlet on its side. One end of the piston cylinder is connected to the sample inlet, and the other end is movably connected to the piston plug. The piston cylinder has a fish-adding inlet and a water-adding inlet. The fish-adding inlet is used to introduce the female tilapia to be tested. The water-adding inlet is connected to the water-adding mechanism, which adds water to the piston cylinder and measures the volume of added water. The piston plug pushes the female tilapia and water from the piston cylinder into the measuring chamber through the sample inlet and then closes the sample inlet.

[0008] The top of the measuring box is equipped with a water measuring tube to measure the total volume of the female tilapia to be tested and the water in the measuring box, thereby obtaining the volume of the female tilapia to be tested, and judging the ovarian maturity of the female tilapia to be tested based on the ratio of the fish's body length to its volume.

[0009] The bottom of the measuring box is provided with a sample outlet, which is used to discharge the female tilapia to be tested and the water inside the measuring box.

[0010] Preferably, the measuring tube is a Z-shaped measuring tube.

[0011] Preferably, the piston cylinder is inclined from top to bottom, and the lower end of the piston cylinder is connected to the sample inlet of the measuring box, while the upper end of the piston cylinder is movably connected to the piston bolt; the fish inlet and the water inlet on the piston cylinder are both positioned above the top of the measuring box.

[0012] Preferably, the device for detecting the ovarian maturity of female tilapia further includes a base supported on the bottom of the measuring box.

[0013] Preferably, the base is a frame structure.

[0014] Preferably, the sample outlet of the measuring box is arranged facing downwards, and a door panel is hinged to the sample outlet of the measuring box. An opener / closer is provided between the door panel and the base, and the opener / closer can open or close the door panel.

[0015] Preferably, the opening and closing device includes a support, a lever, a top spring, a support column, and a serrated buckle. The support is fixed to the top of the base near the door panel. The middle part of the lever is hinged to the support, and the first end of the lever is connected to the outside of the door panel through the top spring.

[0016] The support column is fixed to the side of the base near the support, the serrated buckle is fixed to the support column, and the second end of the lever can be engaged with the serrated buckle;

[0017] When the second end of the lever engages with the serrated buckle, the first end of the lever can push the door panel upwards via the top spring to close the door panel; when the second end of the lever disengages from the serrated buckle, the first end of the lever can pull the door panel downwards via the top spring to open the door panel.

[0018] Preferably, the water adding mechanism includes a metering cylinder, an inlet pipe, and an outlet pipe. The metering cylinder is positioned above the measuring box, with an inlet at the top and an outlet at the bottom. A measuring unit is provided inside the metering cylinder for measuring the volume of water inside the metering cylinder.

[0019] One end of the water inlet pipe is connected to the water inlet, and the other end is used to introduce water. The water inlet pipe is equipped with a water inlet valve. One end of the water outlet pipe is connected to the water outlet, and the other end is connected to the water filling port of the piston cylinder. The water outlet pipe is equipped with a water outlet valve.

[0020] Preferably, the measuring unit is a straight measuring tube, which is vertically arranged inside the measuring cylinder.

[0021] Preferably, the metering cylinder is fixed to the top of the measuring box by multiple support rods.

[0022] This utility model achieves the following technical advantages compared to related technologies:

[0023] The present invention provides a device for detecting the ovarian maturity of female tilapia, comprising a measuring box, a piston cylinder, a piston plug, and a water-adding mechanism. During testing, the female tilapia to be tested is placed in the fish-adding port of the piston cylinder, and a certain volume of water is added to the water-adding port of the piston cylinder through the water-adding mechanism. Then, the female tilapia to be tested and the water in the piston cylinder are pushed into the measuring box through the sampling port of the measuring box via the piston plug, and the sampling port is sealed. The total volume of the female tilapia to be tested and the water is measured through the measuring tube at the top of the measuring box. The volume of the female tilapia to be tested is the total volume minus the volume of water added by the water-adding mechanism. Based on the ratio of the fish's body length to its volume, the ovarian maturity of the female tilapia to be tested can be determined. If the female tilapia to be tested reaches the proportion of ovarian maturity, it is considered to have mature gonads and can mate with male tilapia to lay eggs. After the measurement is completed, the female tilapia to be tested and the water in the measuring box are discharged through the sampling port at the bottom of the measuring box. The above process is repeated for the next female fish to be measured.

[0024] This invention can accurately select female tilapia with well-developed ovaries, reducing ineffective parent stock, increasing reproductive efficiency, reducing reproductive input, and is simple to make and easy to operate. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or related technologies, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A schematic diagram of the device for detecting the ovarian maturity of female tilapia provided in Embodiment 1 of this utility model;

[0027] Figure 2 A schematic diagram of the measuring box and piston cylinder provided in Embodiment 1 of this utility model;

[0028] Figure 3 A schematic diagram of the piston bolt provided in Embodiment 1 of this utility model;

[0029] Figure 4 This is a schematic diagram of the base and the opening / closing device provided in Embodiment 1 of this utility model.

[0030] In the diagram: 1-Measuring box, 101-Z-shaped measuring tube, 102-Door panel, 2-Piston cylinder, 201-Fish inlet, 202-Water inlet, 3-Piston bolt, 301-Piston bolt handle, 4-Water filling mechanism, 401-Measuring cylinder, 402-Water inlet pipe, 403-Water outlet pipe, 404-Straight measuring tube, 405-Support rod, 5-Base, 6-Opener / Closer, 601-Support, 602-Lever, 603-Top spring, 604-Support column, 605-Serrated buckle, 606-Lever handle. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] The purpose of this invention is to provide a device for detecting the maturity of female tilapia ovaries, in order to solve the problems existing in related technologies, and to effectively detect whether the ovaries of female tilapia are mature, so as to achieve the purpose of accurate and efficient breeding.

[0033] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Example 1

[0035] like Figure 1 As shown, this embodiment provides a device for detecting the ovarian maturity of female tilapia, including a measuring box 1, a piston cylinder 2, a piston plug 3, and a water filling mechanism 4.

[0036] In this embodiment, as Figures 2-3As shown, the measuring box 1 is a rectangular box with a sample inlet on its side. One end of the piston cylinder 2 is connected to the sample inlet, and the other end is movably connected to the piston bolt 3. The piston cylinder 2 is equipped with a fish inlet 201 and a water inlet 202. The fish inlet 201 is used to introduce the female tilapia to be tested, and the water inlet 202 is connected to the water adding mechanism 4. The water adding mechanism 4 can add water into the piston cylinder 2 and measure the volume of the added water. The piston bolt 3 can separate the female tilapia to be tested and the water in the piston cylinder 2 through... The injection port is pushed into the measuring chamber 1 and then sealed. Specifically, in this embodiment, the cross-sections of the piston cylinder 2 and the piston plug 3 are both rectangular. The piston cylinder 2 is inclined from top to bottom, and the lower end of the piston cylinder 2 is connected to the injection port of the measuring chamber 1. The upper end of the piston cylinder 2 is movably connected to the piston plug 3. The fish inlet 201 and the water inlet 202 on the piston cylinder 2 are both set higher than the top of the measuring chamber 1. The piston plug 3 is also provided with a piston plug handle 301 at the end away from the piston cylinder 2, which facilitates pushing and pulling the piston plug 3.

[0037] In this embodiment, the water adding mechanism 4 includes a metering cylinder 401, an inlet pipe 402, and an outlet pipe 403. The metering cylinder 401 is positioned above the measuring box 1, with an inlet at the top and an outlet at the bottom. A metering unit is provided inside the metering cylinder 401 to measure the volume of water within it. In this embodiment, the metering unit is preferably a straight measuring tube 404. One end of the inlet pipe 402 is connected to the inlet, and the other end is used for... Water is introduced into the metering cylinder 402, and an inlet valve is provided on the inlet pipe 402; one end of the outlet pipe 403 is connected to the outlet, and the other end is connected to the water inlet 202 of the piston cylinder 2, and an outlet valve is provided on the outlet pipe 403; specifically, in this embodiment, the metering cylinder 401 is fixed to the top of the measuring box 1 by multiple support rods 405, and the straight measuring tube 404 is vertically arranged inside the metering cylinder 401. The required volume of water can be added into the metering cylinder 401 by adjusting the inlet valve on the inlet pipe 402.

[0038] In this embodiment, a water measuring tube is provided on the top of the measuring box 1. The water measuring tube is preferably a Z-shaped measuring tube 101 to measure the total volume of the female tilapia to be tested and the water in the measuring box 1, thereby obtaining the volume of the female tilapia to be tested (volume of the female tilapia to be tested = reading of the Z-shaped measuring tube 101 - volume of water added to the measuring box 1 by the measuring cylinder 401). The ovarian maturity of the female tilapia to be tested is determined according to the ratio of the fish's body length to its volume. If the female tilapia to be tested reaches the proportion of ovarian development maturity, it is considered to have mature gonads and can mate with male tilapia to lay eggs.

[0039] In this embodiment, the bottom of the measuring box 1 is provided with a sample outlet, which is used to discharge the female tilapia to be tested and the water inside the measuring box 1; after the measurement is completed, the female tilapia to be tested and the water inside the measuring box 1 are discharged through the sample outlet at the bottom of the measuring box 1 so that the next fish can be measured.

[0040] In this embodiment, the device for detecting the ovarian maturity of female tilapia also includes a base 5, which is supported at the bottom of the measuring box 1. Specifically, the base 5 in this embodiment is preferably a frustum-shaped frame structure that can support the measuring box 1, piston cylinder 2, piston bolt 3, and water filling mechanism 4.

[0041] In this embodiment, the sample outlet of the measuring box 1 is set downward, and a door panel 102 is hinged to the sample outlet of the measuring box 1. An opener / closer 6 is provided between the door panel 102 and the base 5. The opener / closer 6 can open or close the door panel 102. When the door panel 102 is opened, the female tilapia to be tested and the water inside the measuring box 1 will flow out. When the door panel 102 is closed, it will seal the measuring box 1.

[0042] Furthermore, such as Figure 4 As shown, the opening / closing device 6 includes a support 601, a lever 602, a top spring 603, a support column 604, and a serrated buckle 605. The support 601 is fixed to the top of the base 5 near the door panel 102. The middle part of the lever 602 is hinged to the support 601, and the first end of the lever 602 is connected to the outside of the door panel 102 through the top spring 603. The support column 604 is fixed to the side of the base 5 near the support 601, and the serrated buckle 605 is fixed to the support column 604. The second end of lever 602 can engage with the serrated buckle 605. In this embodiment, the second end of lever 602 is also provided with a lever handle 606. When the second end of lever 602 engages with the serrated buckle 605, the first end of lever 602 can push the door panel 102 up through the top spring 603 to close the door panel 102. When the second end of lever 602 is separated from the serrated buckle 605, the first end of lever 602 can pull down the door panel 102 through the top spring 603 to open the door panel 102.

[0043] The usage process of the device for detecting the ovarian maturity of female tilapia provided in this embodiment is as follows:

[0044] First, estimate the volume of the female tilapia to be tested. Then, add the volume of water in the metering cylinder 401 so that the reading appears on the Z-shaped measuring tube 101. The initial estimated volume of the female tilapia to be tested is 300 ml, and the volume of the measuring box 1 is 1500 ml. The volume of water added to the metering cylinder 401 is greater than 1200 ml and less than the maximum volume of 1200 ml plus the Z-shaped measuring tube 101. This ensures that after adding the female tilapia to be tested and water to the measuring box 1, a reading can be obtained on the Z-shaped measuring tube 101 without overflowing.

[0045] When testing the fish, connect the inlet pipe 402 to the water source, open the inlet valve on the inlet pipe 402, and add the required volume of water into the metering cylinder 401; open the outlet valve on the outlet pipe 403 to allow the water in the metering cylinder 401 to flow into the measuring chamber 1 through the piston cylinder 2; place the female tilapia to be tested into the fish inlet 201, and then push the piston handle 301 to press the female tilapia and water into the measuring chamber 1. At this time, the head plane of the piston 3 is coplanar with the side of the measuring chamber 1, and a small amount of gas will escape from the Z-shaped measuring tube 101. Read the value of the water on the Z-shaped measuring tube 101, that is, the volume of water in the measuring chamber 1 plus the volume of the female tilapia to be tested plus the volume of water in the Z-shaped measuring tube 101. The volume of a female tilapia is calculated as follows: (Reading value of Z-shaped measuring tube 101) - (Volume of water added to measuring box 1 via measuring cylinder 401). The ovarian maturity of the female tilapia is determined based on the ratio of its body length to its volume. If the female tilapia reaches the ovarian maturity level, it is considered to have mature gonads and can mate with male tilapia to lay eggs. After measurement, the lever handle 606 is pressed down, separating the lever 602 from the serrated buckle 605. The top spring 603 loses its force, and the door panel 102 opens downwards, allowing the female tilapia and water in measuring box 1 to flow out. After the water in measuring box 1 is drained, the lever handle 606 is pressed down again, causing the top spring 603 to push against the door panel 102. This process is repeated for the next female tilapia.

[0046] Using this device to detect the gonadal development of female fish during the breeding season, and then mating female fish that meet the standards with male fish, the breeding success rate is over 95%, and the uniformity of the size of the seedlings is significantly improved in the later stage of seedling cultivation.

[0047] Example 2

[0048] The difference between this embodiment and Embodiment 1 is that, in use, the initial estimated volume of the female tilapia to be tested is 500 ml, the volume of the measuring box 1 is 1500 ml, and the volume of water added to the metering cylinder 401 is greater than 1000 ml but less than the maximum volume of 1000 ml plus the Z-shaped measuring tube 101. This ensures that after adding the female tilapia to be tested and water to the measuring box 1, the reading can be obtained on the Z-shaped measuring tube 101 without overflowing.

[0049] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A device for detecting the ovarian maturity of female tilapia, characterized in that: The device includes a measuring box, a piston cylinder, a piston plug, and a water filling mechanism. The measuring box has a sample inlet on its side. One end of the piston cylinder is connected to the sample inlet, and the other end is movably connected to the piston plug. The piston cylinder has a fish inlet and a water inlet. The fish inlet is used to introduce a female tilapia to be tested. The water inlet is connected to the water filling mechanism, which can add water to the piston cylinder and measure the volume of water added. The piston plug can push the female tilapia to be tested and the water in the piston cylinder into the measuring box through the sample inlet and then close the sample inlet. The top of the measuring box is equipped with a water measuring tube to measure the total volume of the female tilapia to be tested and the water in the measuring box, thereby obtaining the volume of the female tilapia to be tested, and judging the ovarian maturity of the female tilapia to be tested based on the ratio of the fish's body length to its volume. The bottom of the measuring box is provided with a sample outlet, which is used to discharge the female tilapia to be tested and the water inside the measuring box.

2. The device for detecting the ovarian maturity of female tilapia according to claim 1, characterized in that: The measuring tube is a Z-shaped measuring tube.

3. The device for detecting the ovarian maturity of female tilapia according to claim 1, characterized in that: The piston cylinder is inclined from top to bottom, and the lower end of the piston cylinder is connected to the sample inlet of the measuring box, while the upper end of the piston cylinder is movably connected to the piston bolt; the fish inlet and the water inlet on the piston cylinder are both set higher than the top of the measuring box.

4. The device for detecting the ovarian maturity of female tilapia according to claim 1, characterized in that: The device for detecting the ovarian maturity of female tilapia also includes a base supported at the bottom of the measuring box.

5. The device for detecting the ovarian maturity of female tilapia according to claim 4, characterized in that: The base is a frame structure.

6. The device for detecting the ovarian maturity of female tilapia according to claim 5, characterized in that: The sample outlet of the measuring box is arranged facing downwards, and a door panel is hinged to the sample outlet of the measuring box. An opener / closer is provided between the door panel and the base, and the opener / closer can open or close the door panel.

7. The device for detecting the ovarian maturity of female tilapia according to claim 6, characterized in that: The opening and closing device includes a support, a lever, a top spring, a support column, and a serrated buckle. The support is fixed to the top of the base near the door panel. The middle part of the lever is hinged to the support, and the first end of the lever is connected to the outside of the door panel through the top spring. The support column is fixed to the side of the base near the support, the serrated buckle is fixed to the support column, and the second end of the lever can be engaged with the serrated buckle; When the second end of the lever engages with the serrated buckle, the first end of the lever can push the door panel upwards via the top spring to close the door panel; when the second end of the lever disengages from the serrated buckle, the first end of the lever can pull the door panel downwards via the top spring to open the door panel.

8. The device for detecting the ovarian maturity of female tilapia according to claim 1, characterized in that: The water adding mechanism includes a metering cylinder, an inlet pipe, and an outlet pipe. The metering cylinder is positioned above the measuring box, with an inlet at the top and an outlet at the bottom. A measuring unit is provided inside the metering cylinder for measuring the volume of water inside the metering cylinder. One end of the water inlet pipe is connected to the water inlet, and the other end is used to introduce water. The water inlet pipe is equipped with a water inlet valve. One end of the water outlet pipe is connected to the water outlet, and the other end is connected to the water filling port of the piston cylinder. The water outlet pipe is equipped with a water outlet valve.

9. The device for detecting the ovarian maturity of female tilapia according to claim 8, characterized in that: The measuring unit is a straight measuring tube, which is vertically installed inside the measuring cylinder.

10. The device for detecting the ovarian maturity of female tilapia according to claim 8, characterized in that: The metering cylinder is fixed to the top of the measuring box by multiple support rods.

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