Eriocheir sinensis artificial nest

Abstract

The utility model discloses an Eriocheir sinensis artificial nest which comprises a fixing support, a fixing basket and a plurality of nest units fixed with the fixing support, each nest unit is of a prismatic table-shaped cage structure, one end of each nest unit is an open end, the other end of each nest unit is a closed end, and the triangular structure of each open end is larger than that of each closed end. And the triangular structure of the closed end is provided with a gap. The Chinese mitten crab frame is suitable for hiding and climbing of Chinese mitten crabs in different growth stages, so that the Chinese mitten crabs can conveniently protect the territory and resist invasion.

Description

Technical Field

[0001] The utility model relates to the technical field of facility breeding, in particular to an artificial nest for Chinese mitten crabs. Background Art

[0002] At present, the cultivation of Chinese mitten crab still requires the planting of aquatic plants, which provide a hiding place for Chinese mitten crab to molt and satisfy the climbing habit of river crabs. However, many pond aquatic plants will wither prematurely, which will greatly affect the yield and quality of Chinese mitten crab. For this reason, we have previously developed several artificial nests, which have certain effects in use, but the existing artificial nests are inconvenient to store and easy to float during use. In addition, when artificial nests are used instead of aquatic plants to cultivate Chinese mitten crabs, the rate of molting remains is high. For this reason, we further studied the living habits of Chinese mitten crabs and found that: (1) they like to hide in a small space that can barely accommodate themselves, and the hiding place must be easy to defend and difficult to attack; (2) they like to live alone, and when there are intruders in their territory, they will fight to drive them away. If they cannot drive them away, they will not molt, and the survival rate of molting is also low; (3) their hiding places must be well concealed and not easily discovered by other animals.

[0003] Based on the above living habits of Chinese mitten crabs and the problems found in the application of artificial nest crab farming technology, it is necessary to further improve the artificial nests. Summary of the invention

[0004] In order to overcome the above problems, the utility model aims to provide an artificial nest for Chinese mitten crabs, which is suitable for Chinese mitten crabs at different growth stages to hide and climb, so as to help them protect their territory and resist invasion.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is: an artificial nest for Chinese mitten crab, including a fixed bracket, a fixed basket and a plurality of nest units fixed to the fixed bracket, the nest unit is a triangular prism-shaped cage structure, one end of the nest unit is an open end, and the other end is a closed end, the triangular structure of the open end is larger than the triangular structure of the closed end, and the triangular structure of the closed end has a gap.

[0006] Preferably, each group consists of 33-48 nest units.

[0007] Preferably, the height of the triangular prism-shaped cage structure is 30 cm, the inner diameter of the base of the triangular structure at the open end is 14 cm, the inner diameter of the height is 7 cm, and a first buckle is provided at a position 2 cm from the bottom surface of the open end to the open end surface.

[0008] Preferably, the inner diameter of the base of the triangular structure at the closed end is 9 cm, the inner diameter of the height is 4 cm, and the base of the triangular structure at the closed end is parallel to the base of the triangular structure at the open end.

[0009] Preferably, the length and width of the gap are 5cm╳1cm.

[0010] Preferably, the cage wall of the triangular prism-shaped cage structure is made of polypropylene, polyethylene or polyvinyl chloride, with a thickness of more than 0.1 cm, and its inner wall needs to be roughened, or the wall material has small holes of less than 0.3 cm, with a hole spacing of about 1 cm.

[0011] Preferably, the fixing bracket is provided with a large triangular hole and a small triangular hole.

[0012] Preferably, the length of each side of the large triangular hole is smaller than the outer diameter of the open end triangular structure by 0.5 cm; the length of each side of the small triangular hole is larger than the outer diameter of the closed end triangular structure by 0.5 cm, so that the nest unit can be fixed to the fixed bracket, and second buckles that are snap-fitted with the fixed basket are provided on both sides of the fixed bracket. A buckle is provided for every two triangular holes and the two sides are staggered, which is convenient for assembly into artificial nests of different shapes.

[0013] Preferably, a third buckle that is snap-fitted with the second buckle is provided at the upper edge of the fixed basket, and the fixed basket can be loaded with sand or gravel.

[0014] Preferably, two fixed baskets are provided, and holes are respectively opened on the sides thereof to facilitate the outflow of water in the basket when taking out. The fixed basket is a regular quadrangular pyramid structure, with an upper base length of 30 cm, a lower base length of 29 cm, and a pyramid height of 20 cm.

[0015] The beneficial effects of the utility model are as follows: (1) the triangular prism shape of the artificial nest unit is suitable for hiding Chinese mitten crabs at different growth stages, and the juvenile stage can hide in sharp angles; (2) one end is closed, which is convenient for the crabs to protect their territory and resist invasion; (3) the nest is deepened, up to 30 cm, which increases the safe territory range and can improve the molting rate; (4) there is a rectangular gap at the closed end, which is convenient for water exchange inside and outside the nest and improves the water quality in the nest, but the gap is narrow and will not cause defensive pressure to the Chinese mitten crabs in the nest; (5) a fixed basket is provided to solve the problem of the nest floating; (6) the nest units and the fixed basket can be stacked, which is convenient for transportation and storage; (7) the fixed bracket can be cut as needed and assembled into artificial nests of different shapes. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0017] Figure 1 It is a structural schematic diagram of this embodiment;

[0018] Figure 2 is a schematic diagram of this embodiment;

[0019] Figure 3It is a schematic diagram of the top view of the structure of this embodiment;

[0020] Figure 4 is a schematic diagram of the fixed bracket structure of this embodiment;

[0021] Figure 5 This is a schematic diagram of the structure of the fixed bracket and the fixed basket being connected in this embodiment;

[0022] Figure 6 is a schematic structural diagram of a fixed basket of this embodiment;

[0023] Figure 7 Schematic diagram of the structure of the nest unit of this embodiment;

[0024] Figure 8 is a schematic structural diagram of the opening end of this embodiment;

[0025] Fig. 9 Schematic diagram of the structure of the closed end of this embodiment.

[0026] In the figure: 1, nest unit; 2, open end; 3, closed end; 4, gap; 5, fixing bracket; 6, second buckle; 7, fixing basket; 8, first buckle; 9, large triangular hole; 10, small triangular hole; 11, third buckle. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0028] See also Figure 1-Figure 9 The present embodiment discloses an artificial nest for Chinese mitten crab, comprising a fixed support 5, a fixed basket 7 and a plurality of nest units 1 fixed to the fixed support 5, wherein each group of the nest units 1 is provided with 33-48 nest units 1, wherein the nest unit 1 is a triangular prism-shaped cage structure, wherein the height of the triangular prism-shaped cage structure is 30 cm, wherein one end of the nest unit 1 is an open end 2, and the other end is a closed end 3, wherein the triangular structure of the open end 2 is larger than the triangular structure of the closed end 3, wherein the triangular structure of the closed end 3 has a gap 4, wherein the inner diameter of the base of the triangular structure of the open end 2 is 14 cm, and the inner diameter of the height is 7 cm, wherein the inner diameter of the base of the triangular structure of the closed end 3 is 9 cm, and the inner diameter of the height is 4 cm, and the base of the triangular structure of the closed end 3 is parallel to the base of the triangular structure of the open end 2, and the length and width of the gap 4 are 5 cm╳1 cm.

[0029] The fixing bracket 5 is a mesh structure made of PVC material with a width of 30 cm (or doubled) and can be cut. A large triangular hole 9 and a small triangular hole 10 are provided on the fixing bracket 5. The length of each side of the large triangular hole 9 is less than the outer diameter of the triangular structure of the open end 2 by 0.5 cm; the length of each side of the small triangular hole 10 is greater than the outer diameter of the triangular structure of the closed end 3 by 0.5 cm, so that the nest unit 1 can be fixed to the fixing bracket 5. A first buckle 8 is provided on the bottom surface of the open end 2 2 cm away from the open end surface to prevent the nest unit 1 from falling off the fixing bracket 5; second buckles 6 that are snap-fitted with the fixing basket 7 are provided on both sides of the fixing bracket 5, and a second buckle 6 is provided for every two triangular holes (two large triangular holes or two small triangular holes or one large triangular hole and one small triangular hole). The second buckles 6 are staggered on both sides of the fixing bracket 5 to facilitate cutting and assembling into artificial nests of different forms.

[0030] The upper edge of the fixed basket 7 is provided with a third buckle 11 which is engaged with the second buckle 6. The fixed basket 7 is a plastic square pyramid box structure, which can be loaded with sand or gravel. Two fixed baskets 7 are provided, and holes are opened on the sides thereof to facilitate the outflow of water in the basket when taking out. The upper bottom side of the fixed basket 7 is 30 cm long, the lower bottom is 29 cm long, and the prism height is 20 cm.

[0031] The cage wall material of the triangular prism cage structure is polypropylene, polyethylene or polyvinyl chloride, with a thickness of more than 0.1 cm, and its inner wall needs to be roughened, or the wall material has small holes of less than 0.3 cm, with a hole spacing of about 1 cm.

[0032] The nest unit 1 and the fixing bracket 5 can also be integrally formed by using a mold.

[0033] When in use, take (or cut) two pieces of fixing brackets 5 of appropriate size (preferably capable of fixing 33 nest units 1), fix the nest unit 1 to the fixing bracket 5, and then tie the fixing bracket 5 and two fixing baskets 7 with nylon ropes through the cooperation of the second buckle 6 and the third buckle 11, and place them in the pond.

[0034] The nest unit, the fixed bracket and the fixed basket can all be stacked, which solves the problem of taking up too much space during transportation and storage; the fixed basket equipped with the utility model solves the problem of the nest body floating; the two fixed brackets fix the nest unit, reducing the movement range of the nest unit in the water and satisfying the quiet habits of river crabs; the fixed basket is provided with holes, and the water in the basket flows out naturally when it is taken out, which is easy to operate; the nest body is regular, which is convenient for mechanized mass production. This artificial nest is placed in the crab pond as a hiding place for Chinese mitten crabs, and has the function of replacing aquatic plants. Usually 50-80 groups are placed in one acre of land.

[0035] Of course, the above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any modifications made according to the spirit of the main technical solution of the utility model should be included in the protection scope of the utility model.

Claims

1. An artificial nest for Chinese mitten crab, comprising a fixed support, a fixed basket and a plurality of nest units fixed to the fixed support, characterized in that: The nest unit is a triangular pyramid cage structure, one end of the nest unit is an open end, and the other end is a closed end, the triangular structure of the open end is larger than the triangular structure of the closed end, and the triangular structure of the closed end has a gap.

2. The artificial nest of Chinese mitten crab according to claim 1, characterized in that: Each group consists of 33-48 nest units.

3. The artificial nest of Chinese mitten crab according to claim 1, characterized in that: The height of the triangular prism-shaped cage structure is 30 cm, the inner diameter of the base of the triangular structure at the open end is 14 cm, the inner diameter of the height is 7 cm, and a first buckle is provided on the bottom surface of the open end 2 cm away from the open end surface.

4. The artificial nest of Chinese mitten crab according to claim 3, characterized in that: The inner diameter of the base of the triangular structure at the closed end is 9 cm, and the inner diameter of the height is 4 cm, and the base of the triangular structure at the closed end is parallel to the base of the triangular structure at the open end.

5. The artificial nest of Chinese mitten crab according to claim 4, characterized in that: The length and width of the gap are 5cm×1cm.

6. The artificial nest of Chinese mitten crab according to claim 1, characterized in that: The cage wall material of the triangular prism cage structure is polypropylene, polyethylene or polyvinyl chloride, with a thickness of more than 0.1 cm, and its inner wall needs to be roughened, or the wall material has small holes of less than 0.3 cm, with a hole spacing of 1 cm.

7. The artificial nest of Chinese mitten crab according to claim 3, characterized in that: The fixing bracket is provided with a large triangular hole and a small triangular hole.

8. The artificial nest of Chinese mitten crab according to claim 7, characterized in that: The length of each side of the large triangular hole is smaller than the outer diameter of the triangular structure at the open end by 0.5 cm; the length of each side of the small triangular hole is larger than the outer diameter of the triangular structure at the closed end by 0.5 cm, so that the nest unit can be fixed to the fixed bracket. Second buckles that are engaged with the fixed basket are provided on both sides of the fixed bracket. One buckle is provided for every two triangular holes and the two sides are staggered, which is convenient for assembling into artificial nests of different shapes.

9. The artificial nest of Chinese mitten crab according to claim 8, characterized in that: A third buckle which is engaged with the second buckle is arranged at the upper edge of the fixed basket.

10. The artificial nest of Chinese mitten crab according to claim 9, characterized in that: There are two fixed baskets, each with a hole on its side to facilitate the outflow of water in the basket when it is taken out. The fixed basket is a regular quadrangular pyramid structure with an upper bottom side length of 30 cm, a lower bottom side length of 29 cm, and a prism height of 20 cm.

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