CN107318720B - A clownfish hatching egg collection device - Google Patents

Abstract

The invention discloses a device for collecting hatching eggs of clownfish, which comprises a collection box with an opening at the upper end, a box cover covering the upper end of the collection box, a sealing plate and a light source. The hatching egg collection hole, the hole wall of the hatching egg collection hole is in the shape of a truncated cone, and the two corresponding sides of the lower end surface of the bottom plate of the collection box are respectively provided with vertically downward guide plates, and the facing sides of the two guide plates are respectively provided with There is a chute, the sealing plate slides between the chute, and the upper surface of the sealing plate is covered with sealing rubber. When the sealing plate slides under the collection box, the sealing rubber is tightly pressed on the bottom surface of the collection box, and seals all distributions on the bottom plate. The hatching egg collection hole is on the top, the light source is fixed on the inner wall of the collection box, and the light emitted by the light source shines on the inside of the collection box. The invention has high collection efficiency, less damage to the hatching eggs of clownfish, and reduces the disturbance to broodstock .

Description

A clownfish hatching egg collection device

Technical Field

The invention relates to a clownfish hatching egg collecting device.

Background Art

With the rise of the marine ornamental fish industry, people have gradually attached importance to artificial breeding of clownfish, and its efficient seedling breeding technology has become a key link in the scientific research needs and market supply of clownfish. At present, there are two main ways to collect clownfish hatching eggs: 1. Collect them artificially by focusing on the night of hatching, taking advantage of the phototropism of clownfish hatching eggs; 2. Transfer the attachments to a clean bucket prepared in advance two hours in advance on the night of hatching. Both methods have certain defects. The former consumes manpower and is easy to disturb the parent fish, affecting subsequent spawning. The latter is restricted by weather, and sudden changes in climate factors will lead to the failure of hatching eggs.

Summary of the invention

The technical problem to be solved by the present invention is to provide a clownfish hatching egg collection device, which has high collection efficiency, reduces the consumption of manpower and material resources, causes little damage to the clownfish hatching eggs, and reduces the disturbance to parent fish.

To solve the above technical problems, the technical solution adopted by the present invention is as follows:

A clownfish hatching egg collecting device comprises a collecting box with an opening at the upper end, a box cover covering the upper end of the collecting box, a sealing plate and a light source for attracting clownfish hatching eggs. Hatching egg collecting holes for hatching eggs to enter the collecting box are distributed on the bottom plate of the collecting box, and the hole walls of the hatching egg collecting holes are in a frustum shape. Two corresponding side edges of the lower end surface of the bottom plate of the collecting box are respectively provided with vertically downward guide plates, and the facing sides of the two guide plates are respectively provided with sliding grooves. The sealing plate slides between the sliding grooves, and the upper surface of the sealing plate is paved with sealing rubber. When the sealing plate slides under the collecting box, the sealing rubber is pressed tightly against the bottom surface of the collecting box and seals all the hatching egg collecting holes distributed on the bottom plate. The light source is fixed on the inner wall of the collecting box, and the light emitted by the light source is irradiated toward the inside of the collecting box.

Furthermore, the sealing plate includes a first sealing plate and a second sealing plate, and the first sealing plate and the second sealing plate respectively seal the hatching egg collecting holes distributed on the bottom plate of the collecting box.

Furthermore, the box cover is provided with ventilation holes which are arranged side by side to ensure that there is sufficient oxygen in the collection box.

Furthermore, it also includes a wire clamp, the light source is a fiber optic light emitter, the optical fiber of the fiber optic light emitter is clamped to the upper end of one side wall of the collection box through the wire clamp, and the end of the optical fiber of the fiber optic light emitter that emits light is located inside the collection box.

Furthermore, the upper sides of two opposite outer sides of the collection box are respectively provided with downwardly bent hanging edges for facilitating the fixing of the collection box.

Furthermore, the hatching egg collecting holes are regularly arranged in the horizontal and vertical directions and are located in the middle area of the bottom plate of the collecting box.

Furthermore, the hatching egg collecting hole has a lower diameter of 3 mm and an upper diameter of 1.5 mm.

Furthermore, the collection box is in the shape of an inverted trapezoid.

Furthermore, outer sides of the first sealing plate and the second sealing plate are respectively provided with downward flanges for facilitating the operation of the sealing plates.

Furthermore, two opposite through holes are provided in the middle of the upper end surface of the box cover, and a handle is formed between the two through holes for the user to lift or close the box cover conveniently.

Compared with the prior art, the present invention has the following beneficial effects:

The invention utilizes the phototaxis characteristic of clownfish hatching eggs, arranges a light source in a collecting box, and opens a hatching egg collecting hole on the bottom plate of the collecting box. Under the attraction of the internal light source, the clownfish hatching eggs automatically enter the collecting box from the hatching egg collecting hole. After the eggs are collected, the sealing plate at the bottom is closed, and the eggs are no longer affected by climatic conditions, and damage to the clownfish hatching eggs caused by artificial fishing and transfer is avoided, and the disturbance to parent fish is reduced. The invention has low cost, convenient operation, high collection efficiency, and reduced consumption of manpower and material resources.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of the present invention when no light source is installed;

FIG2 is a second schematic diagram of the structure of the present invention when no light source is installed;

FIG3 is a schematic diagram of the structure of the present invention when the light source is not installed and the box cover and the sealing plate are closed;

FIG4 is a second schematic diagram of the structure of the present invention when the light source is not installed and the box cover and the sealing plate are closed;

FIG5 is a schematic structural diagram of a hatching egg collection hole of the present invention;

FIG6 is a statistical graph showing the hatchability of each egg-laying in an experiment of 12 egg-layings over a period of 6 months;

FIG7 is a statistical graph of the total hatchability in an experiment of 12 spawnings over a period of 6 months;

Figure 8 is a statistical graph of the collection rate of eggs for each spawning in an experiment of 12 spawnings over a period of 6 months;

FIG9 is a statistical graph of the total collection rate during the 6-month, 12-spawning experiment;

Figure 10 is a statistical graph showing the survival rate of each spawning in an experiment of 12 spawnings over a period of 6 months;

FIG. 11 is a statistical graph showing the overall survival rate in an experiment with 12 spawnings over a period of 6 months.

DETAILED DESCRIPTION

A clownfish hatching egg collecting device as shown in Figures 1 to 4 includes a collecting box 2 with an opening at the upper end, a box cover 1 covering the upper end of the collecting box, a sealing plate, a wire clamp and a light source for attracting clownfish hatching eggs, wherein the collecting box 2, the box cover 1 and the sealing plate are all made of plastic, and the wire clamp and the light source are not shown in the figure.

The shape of the collecting box 2 is an inverted trapezoid, and the upper sides of two opposite outer sides of the collecting box 2 are respectively provided with downwardly bent hanging edges 23 for facilitating the fixing of the collecting box, and the hanging edges 23 are bent with a certain curvature. Hatching egg collecting holes 22 for hatching eggs to enter the collecting box are distributed on the bottom plate of the collecting box 2. The hatching egg collecting holes 22 shown in Figure 5 are in the shape of a cone with a lower end diameter greater than an upper end diameter, and the lower end diameter of the hatching egg collecting holes 22 is 3mm, and the upper end diameter is 1.5mm. The cone-shaped hatching egg collecting holes facilitate the external clownfish hatching eggs to enter the collecting box 2 while also preventing the clownfish hatching eggs in the collecting box 2 from escaping as much as possible. The hatching egg collecting holes 22 are arranged regularly in the horizontal and vertical directions and are located in the middle area of the bottom plate of the collecting box 2.

A vertically downward guide plate 21 is respectively provided on two corresponding side edges of the lower end surface of the collecting box 2, and a slide groove 24 is respectively provided on the facing sides of the two guide plates 21. The sealing plate comprises a first sealing plate 3 and a second sealing plate 4. The first sealing plate 3 and the second sealing plate 4 are symmetrical in structure. The first sealing plate 3 and the second sealing plate 4 slide into the slide groove 24 from both ends of the slide groove 24, respectively. Sealing rubber 42 is laid on the upper surfaces of the first sealing plate 3 and the second sealing plate 4, respectively. When the first sealing plate 3 and the second sealing plate 4 slide under the collecting box 2, the sealing rubber 42 is pressed against the lower end surface of the bottom plate of the collecting box 2. The sealing rubber 42 on the sealing plate 3 and the second sealing plate 4 respectively seal the hatching egg collection holes 22 on both sides of the collection box. The elasticity of the sealing rubber 42 ensures the seamless connection between the sealing plate and the bottom surface of the collection box. The area of the first sealing plate 3 and the second sealing plate 4 added together is smaller than the area of the bottom plate of the collection box. When the first sealing plate 3 and the second sealing plate 4 are closed, the first sealing plate 3 and the second sealing plate 4 are located in the middle area of the bottom plate of the collection box, sealing the hatching egg collection holes 22 concentrated in the middle area. The outer sides of the first sealing plate 3 and the second sealing plate 4 are respectively provided with downward flanges 41 for convenient operation of the sealing plate. The thickness of the first sealing plate 3 and the second sealing plate 4 is 2 mm, the thickness of the sealing rubber 42 is 1 mm, and the width of the chute 24 is 3 mm.

The box cover 1 is in a square shape, and downward vertical edges 14 are provided on two opposite sides of the box cover 1. When the cover is the box cover 1, the vertical edges 14 are located on the two outer sides of the collection box 2 without the hanging edges 23, and the box cover 1 is limited at the upper end of the collection box 2 by the vertical edges 14. Four rows of vents 11 are provided on the box cover 1, and the four rows of vents are parallel and side by side. The vents 11 ensure sufficient oxygen in the collection box 2. The vents 11 are rectangular holes of 3mm×10mm. Two opposite through holes 12 are provided in the middle of the upper end surface of the box cover, and the through holes 12 are located between the vents 11. A handle 13 is formed between the two through holes 12 for users to lift or close the box cover conveniently.

The light source used to attract clownfish to hatch eggs is a fiber optic light emitter, which is an existing device that transmits light to the area that needs to be illuminated through optical fiber. The wire clamp is an ordinary clamp commonly used. The wire clamp clamps the optical fiber of the fiber optic light emitter to the upper end of the side wall of the collection box, that is, the optical fiber and the side wall of the collection box are clamped between the two clamps of the clamp, thereby fixing the optical fiber on the collection box, and the end of the optical fiber that emits light is located inside the collection box 2, so that the light shines into the inside of the collection box 2.

Before use, first, two cross bars corresponding to the two hanging edges 23 of the collecting box are mounted on the upper end of the container for breeding clown fish. When in use, the first sealing plate 3 and the second sealing plate 4 are opened, and the collecting box is hung between the two cross bars through the hanging edges 23. The optical fiber is clamped with a wire clamp, the light emitter is turned on, and the position of the light source irradiation is adjusted, and the box cover 1 is covered. The box cover 1 prevents the collected clown fish hatching eggs from escaping from the upper port. At this time, the upper end of the collecting box 2 is preferably flush with the water surface of the container. Of course, it can also be based on actual needs, but the water body in the collecting box 2 cannot be too little. The light part irradiated by the light source is transmitted from the hatching egg collecting hole 22 below to attract the clown fish hatching eggs. The clown fish hatching eggs continuously enter the collecting box 2 under the attraction of the light source. After the collection is completed, the first sealing plate 3 and the second sealing plate 4 are closed, the wire clamp and the optical fiber are removed, and the collecting box can be lifted for transfer.

In the background technology, it is mentioned that there are two ways to collect clownfish hatching eggs. Now, with the method of using the present invention to collect clownfish hatching eggs, there are three ways to collect. These three ways are experimentally observed and data statistics are conducted for a period of 6 months (due to the climate in Hainan, the peak spawning period of clownfish is from March to August, a total of 6 months, 12 times of spawning). The experiment collects hatching eggs of different batches of the same pair of anemonefish (clownfish) parent fish in different ways for many times, and compares the corresponding collection effects, including the collection rate and the survival rate. The specific situation is shown in Table 1 and Table 2 below (in Table 1 and Table 2, A represents the method of artificial fishing and collection; B represents the method of transferring attachments in advance; C represents the method of collecting using the present invention). Table 1 shows the effects of the collection methods A, B, and C on seed breeding at each spawning. In the above 6 months, the clownfish spawned 12 times in total. Therefore, A, B, and C were compared 12 times in Table 1. Each group of A, B, and C represents the situation when the clownfish spawned once. Table 2 shows the statistics of the effects of the collection methods A, B, and C on seed breeding in 6 months.

Table 1:

Table 2:

While comparing and analyzing the A, B, and C collection methods through the above Tables 1 and 2, the A, B, and C collection methods are also compared and analyzed through the statistical charts of Figures 6 to 11.

In summary, the three hatching egg collection methods of A, B, and C were evaluated with three indicators: hatching rate, collection rate, and survival rate. The results of the three indicators were: C>B>A, and there was no significant difference between the methods in hatching rate, and there was a significant difference between the three methods in collection rate. There was no significant difference between A and B in survival rate, and there was a very significant difference (P<0.01) between A and B and C. At the same time, combined with data and daily production management, it was concluded that the implementation of the A method had a certain negative impact on the next spawning of parent fish, which was speculated to be caused by the disturbance caused by night spotlight fishing, and there was an uncertain factor in the B method, which was greatly affected by the weather, and left the parent fish water body, and the quality and quantity of the fertilized eggs were seriously threatened. Therefore, from the management and maintenance of fertilized egg quantity, quality, and parent fish, and the hatching egg collection effect, including the combination of factors such as hatching rate, collection rate, and survival rate, the C method, that is, the use of the present invention has obvious advantages, and the hatching egg collection, seed breeding and production work of tropical seawater ornamental fish represented by clown fish will be significantly improved and improved.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. The utility model provides a clown fish hatching egg collection device which characterized in that: the hatching egg collecting device comprises a collecting box with an opening at the upper end, a box cover covering the upper end of the collecting box, a sealing plate and a light source for attracting hatching eggs of clown fishes, wherein hatching egg collecting holes for hatching eggs to enter the collecting box are distributed on a bottom plate of the collecting box, the hole wall of each hatching egg collecting hole is in a frustum shape, two corresponding side edges of the lower end surface of the bottom plate of the collecting box are respectively provided with a vertically downward guide plate, the opposite side surfaces of the two guide plates are respectively provided with a sliding groove, the sealing plate slides between the sliding grooves, the upper surface of the sealing plate is paved with sealing rubber, when the sealing plate slides into the lower part of the collecting box, the sealing rubber tightly presses the bottom surface of the collecting box and seals all the hatching egg collecting holes distributed on the bottom plate, the light source is fixed on the inner wall of the collecting box, and light emitted by the light source irradiates the inside of the hatching egg collecting box;

the sealing plates comprise a first sealing plate and a second sealing plate, and the first sealing plate and the second sealing plate respectively seal hatching egg collecting holes distributed on the bottom plate of the collecting box; the box cover is provided with vent holes which are distributed side by side and ensure that the oxygen in the collecting box is sufficient; the light source is an optical fiber illuminator, an optical fiber of the optical fiber illuminator is clamped at the upper end of one side wall of the collecting box through the wire clamp, and one end of the optical fiber illuminator, which emits light, is positioned in the collecting box; and the outer side edges of the first sealing plate and the second sealing plate are respectively provided with a downward flange for facilitating the operation of the sealing plates.

2. The clown fish hatching egg collection device of claim 1, wherein: the upper edges of two opposite outer side surfaces of the collecting box are respectively provided with a downward bent hanging edge which is convenient for the fixing of the collecting box.

3. A clown fish hatching egg collection device as defined in claim 2, wherein: the hatching egg collecting holes are regularly arranged and distributed in the horizontal direction and the vertical direction and are positioned in the middle area of the bottom plate of the collecting box.

4. A clown fish hatching egg collection device as claimed in claim 3, wherein: the diameter of the lower end of the hatching egg collecting hole is 3mm, and the diameter of the upper end of the hatching egg collecting hole is 1.5mm.

5. A clown fish hatching egg collection device as recited in claim 4, wherein: the collecting box is in an inverted trapezoid shape.

6. A clown fish hatching egg collection device as recited in claim 5, wherein: two opposite through holes are formed in the middle of the upper end face of the box cover, and a handle which is convenient for a user to lift or cover the box cover is formed between the two through holes.

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