A breeding device and a method for leeches to produce cocoons

Abstract

The present invention discloses a breeding device for leeches to produce cocoons, which comprises a first housing, a second housing and a coupling part; the first housing and the second housing cooperate with each other through the coupling part to form at least one accommodation cavity, and the accommodation cavity is arranged to accommodate leeches. A method for leeches to produce cocoons is also disclosed, which includes putting leeches into the accommodation cavity, and cooperating the first housing and the second housing with each other through the coupling part; covering and spraying water regularly to keep the breeding device moist; opening the breeding device after a preset time duration, and taking out the parent leeches and the cocoons. The breeding device and method of the present invention can reduce the mortality rate and weight loss of parent leeches, reduce the losses of young cocoons, broken cocoons and premature cocoons, reduce or avoid soil-borne diseases, and reduce the labor cost.

Description

Technical Field

[0001] The present invention relates to the field of reproduction, and particularly to a reproduction device and a method for leeches to produce cocoons. Background Art

[0002] The traditional way for leeches to produce cocoons is soil-based reproduction. Generally, a cement pool needs to be built, and the cement pool is equipped with water inlet and drainage facilities. In the cement pool, a soil layer is set up. Specifically, the soil is sieved, and the water content is adjusted to 40-60%, and a slope with a thickness of 30-50 cm and a width of 40-70 cm is made. Then the leeches are placed on the soil surface, and water is appropriately sprinkled. After the leeches encounter water, they will drill into the soil by themselves. A water-retaining material, such as straw, felt cloth, etc., is covered on the soil. After the leech cocoons are mature, they are dug out from the soil.

[0003] However, the soil-based reproduction method has many problems. For example: 1) Since the time from the breeding leeches entering the soil to digging the cocoons is too long, the mortality rate of the breeding leeches is high, which can be up to more than 60%; and the weight loss rate of the leeches is high, which can be up to more than 50%; 2) Since the breeding leeches produce cocoons in the soil one after another, generally, the cocoon-digging operation is carried out after 80% of the cocoons are mature. The losses of young cocoons, broken cocoons and premature cocoons caused during the cocoon-digging process can reach more than 30%; 3) It is easily affected by soil-borne diseases, and in severe cases, the crop may fail completely; 4) Digging the egg cocoons is laborious and time-consuming.

[0004] To solve the problems caused by soil-based cocoon production, such as high mortality rate of breeding leeches, large weight loss of breeding leeches, large losses of young cocoons, broken cocoons and premature cocoons, soil-borne diseases, and laborious and time-consuming egg cocoon digging, etc., the technical personnel in this field are committed to developing a reproduction device and a method for leeches to produce cocoons without soil. Summary of the Invention

[0005] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide a reproduction device and a method for leeches to produce cocoons that can reduce the mortality rate and weight loss of breeding leeches, reduce the losses of young cocoons, broken cocoons and premature cocoons, reduce or avoid soil-borne diseases, and reduce labor costs. The present invention can solve only one of the above problems, or can solve multiple of the above problems.

[0006] To achieve the above object, the first aspect of the present invention provides a reproduction device. In a specific embodiment, the reproduction device is used for leeches to produce cocoons, and includes a first housing, a second housing and a coupling part; the first housing and the second housing cooperate with each other through the coupling part to form at least one accommodation cavity, and the accommodation cavity is configured to accommodate leeches.

[0007] Further, the length of the accommodation cavity is greater than the width; at least one end of the first housing and / or the second housing in the length direction of the accommodation cavity is provided with a ventilation hole.

[0008] Optionally, the ends of the first housing and the second housing are not blocked to form ventilation holes; optionally, the first housing and the second housing have end walls at the ends, and at least one ventilation hole is provided on the end walls; optionally, the diameter of the ventilation hole is 2-5 mm.

[0009] Optionally, the cross-sections of the first housing and the second housing are at least one rectangle, half-ellipse, semi-circle or half-hexagon.

[0010] Further, the lengths of the first housing and the second housing are 15-30 cm, the wall thickness is 3-8 mm, and the inner diameter of the cross-section of one accommodation cavity is 1-3 cm.

[0011] Further, the joint portion includes a first joint portion and a second joint portion; the first joint portion is the first side wall of the first housing, the second joint portion is the second side wall of the second housing, the first side wall and the second side wall are planes and can correspond to each other; or, the first joint portion is a protrusion or groove on the first side wall of the first housing, the second joint portion is a groove or protrusion on the second side wall of the second housing, and the groove and the protrusion can cooperate with each other;

[0012] Or, the joint portion is a hinge or a hinge, one end of the hinge or the hinge is provided on the first housing, and the other end is provided on the second housing;

[0013] Or, the joint portion is a snap fastener, a magnetic snap fastener or a sticky fastener.

[0014] Optionally, when the first joint portion and the second joint portion are the first side wall and the second side wall, and the first side wall and the second side wall are planes, an external fixing device (such as a rubber strip, a binding band, a rubber band, a rope, etc.) is used to stick or tie the first housing and the second housing for further fixing.

[0015] Further, the first housing and the second housing are made of breathable and water-retaining materials, or made of metal or plastic. Optionally, the breathable and water-retaining materials include clay, bamboo tubes and reed tubes.

[0016] Optionally, when there are two or more accommodation cavities, the first housing has at least one first partition wall, the second housing has at least one second partition wall, and different accommodation cavities are separated by the first partition wall and the second partition wall.

[0017] Optionally, the top surfaces of the first partition wall and the second partition wall are planes and can correspond and cooperate with each other; or, a protrusion or a groove is provided on the first partition wall, a groove or a protrusion is provided on the second partition wall, and the groove and the protrusion cooperate with each other.

[0018] The second aspect of the present invention provides a method for leeches to produce cocoons. In a specific embodiment, the method uses the breeding device as described above;

[0019] Put the leeches into the accommodation chamber, and cooperate the first housing and the second housing with each other through the engaging portion; cover and spray water regularly to keep the breeding device moist; open the breeding device after a preset time period, and take out the parent leeches and cocoons.

[0020] Optionally, the preset time period is 5 to 15 days.

[0021] Further, 1 to 2 leeches are placed in one accommodation chamber.

[0022] Optionally, before putting the leeches into the accommodation chamber, first soak the breeding device with water.

[0023] Optionally, place the breeding device with leeches placed therein indoors, outdoors or in an incubator.

[0024] Using the breeding device and the leech cocoon production method as described above has the following advantages:

[0025] 1. Since the leeches directly produce cocoons in the breeding device, soilless cocoon production without soil is realized. Therefore, soil-borne diseases are cut off at the source.

[0026] 2. The breeding device has an independent accommodation chamber, and the first housing and the second housing can be opened or separated, which is convenient for checking the cocoon production situation, and can take out the parent leeches and cocoons in time after the parent leeches produce cocoons, effectively reducing the mortality rate and weight loss of the parent leeches.

[0027] 3. The cocoons are easy to take out from the breeding device, and the cocoon loss during the cocoon digging operation is solved at the source; compared with digging cocoons from the soil, the labor cost is reduced.

[0028] Hereinafter, the concept, specific structure and technical effects of the present invention will be further described in conjunction with the accompanying drawings to fully understand the purpose, features and effects of the present invention. Description of the Drawings

[0029] Figure 1 is the breeding device of an embodiment of the present invention;

[0030] Figure 2 is the breeding device of another embodiment of the present invention. Detailed Embodiments

[0031] The following introduces multiple preferred embodiments of the present invention with reference to the accompanying drawings of the specification to make its technical content clearer and easier to understand. The present invention can be embodied in many different forms of embodiments, and the protection scope of the present invention is not limited to the embodiments mentioned in the text.

[0032] In the drawings, components with the same structure are denoted by the same numerical reference signs, and components with similar structures or functions everywhere are denoted by similar numerical reference signs. The dimensions and thicknesses of each component shown in the drawings are arbitrarily illustrated, and the present invention does not limit the dimensions and thicknesses of each component. In order to make the illustration clearer, the thicknesses of the components are appropriately exaggerated in some places in the drawings.

[0033] Embodiment 1

[0034] As Figure 1 shown, the breeding device includes a first housing 110, a second housing 120, and a coupling portion 130. The first housing 110 and the second housing 120 can be mutually engaged together through the coupling portion 130 to form a receiving cavity 140.

[0035] The cross-sections of the first housing 110 and the second housing 120 are semi-circular, and the diameters, lengths, and thicknesses of the first housing 110 and the second housing 120 are substantially the same, so that the first housing 110 and the second housing 120 can be fully engaged, and a cylindrical receiving cavity 140 can be formed after the engagement. In another embodiment, the cross-sections of the first housing 110 and the second housing 120 can also be rectangular, semi-elliptical, semi-hexagonal, etc., and after being mutually engaged together, a receiving cavity 140 with a rectangular / square, elliptical, hexagonal, etc. cross-section is formed.

[0036] Ventilation holes are provided on the end walls at both ends in the length direction of the first housing 110 and the second housing 120, so that the leeches placed in the breeding device can breathe normally. In one embodiment, the diameter of the ventilation holes is 2 - 5 mm. In another embodiment, end walls are not provided at both ends in the length direction of the first housing 110 and the second housing 120, and ventilation holes are formed at both ends after the first housing 110 and the second housing 120 are mutually engaged.

[0037] The joint part 130 includes a first joint part 131 and a second joint part 132. The first joint part 131 is a protrusion or groove on the first side wall of the first housing 110, and the second joint part 132 is a groove or protrusion on the second side wall of the second housing 120. A clamping groove fit is formed by the groove and the protrusion. The first joint part 131 and the second joint part 132 are at least one group, and can also be two groups or three groups. In another embodiment, the joint part 130 can also be a hinge or a hinge leaf. One end of the hinge or the hinge leaf is arranged on the first housing 110, and the other end is arranged on the second housing 120. The first housing 110 and the second housing 120 are covered by the hinge or the hinge leaf. In still another embodiment, the joint part 130 is in the form of a snap fastener, a magnetic snap fastener, an adhesive fastener, etc. Through the joint part 130 in the above form, when the first housing 110 and the second housing 120 cover each other, the two are not easy to move relatively, avoiding damage to the leeches or the cocoons they produce in the accommodation cavity. In addition, the above joint part 130 makes the breeding device easy to open, so that the cocoon production situation of the leeches can be observed in time, the mature cocoons can be collected in time, the damage to the immature cocoons is reduced, and the loss caused by premature hatching of the cocoons is also reduced.

[0038] In another embodiment, the first joint part 131 is the first side wall of the first housing 110, and the second joint part 132 is the second side wall of the second housing 120. The first side wall and the second side wall are planes and can correspond and cooperate with each other. Optionally, an external fixing device (such as a rubber strip, a binding band, a rubber band, a rope, etc.) can be used to stick or tie the first housing and the second housing for further fixation.

[0039] The lengths of the first housing 110 and the second housing 120 are 15 - 30 cm, the wall thickness is 3 - 8 mm, and the inner diameter of the accommodation cavity 140 is 1 - 3 cm. Among them, the lengths of the first housing and the second housing are mainly configured according to the length and weight of the leeches, and the inner diameter of the accommodation cavity is configured according to the size of the cocoons. Such length and inner diameter settings enable the accommodation cavity of the breeding device to accommodate 1 - 2 leeches, and at the same time can ensure sufficient space for the leeches to produce cocoons and can accommodate at least one produced cocoon.

[0040] The first housing 110 and the second housing 120 can be made of breathable and water-retaining materials, or made of metal or plastic. The breathable and water-retaining materials include clay, bamboo tubes, and reed tubes. In this embodiment, the first housing 110 and the second housing 120 are made of clay. The breathable performance of the clay ensures the normal breathing of the leeches arranged in the accommodation cavity, and the water-retaining performance of the clay enables the breeding device to maintain moisture for a certain period of time, simulating the situation of moist soil, which is beneficial to the leeches to produce cocoons.

[0041] Embodiment 2

[0042] As Figure 2As shown, the breeding device includes a first housing 210, a second housing 220, and a coupling portion 230. The first housing 210 and the second housing 220 can be cooperatively engaged with each other through the coupling portion 230 to form a plurality of accommodation cavities 240.

[0043] The difference from Embodiment 1 is that the cross-sections of the first housing 210 and the second housing 220 have a plurality of semi-circular shapes, such that a plurality of accommodation cavities 240 can be formed when the first housing 210 and the second housing 220 are closed. The first housing 210 has at least one first partition wall, and the second housing 220 further has at least one second partition wall. Different accommodation cavities 240 are separated by the first partition wall and the second partition wall.

[0044] Vent holes are provided on the end walls of the first housing 210 and the second housing 220 corresponding to each accommodation cavity 240. Alternatively, the ends of the first housing 210 and the second housing 220 are not provided with end walls, and vent holes are directly formed after closing.

[0045] The coupling portion 230 can be a first coupling portion 231 and a second coupling portion 232 that are engaged by a card slot, which are correspondingly provided on the first side wall of the first housing 210 and the second side wall of the second housing 220. In another embodiment, coupling portions engaged by card slots are also provided on the first partition wall of the first housing 210 and the second partition wall of the second housing 220, so as to further improve the mating stability between the first housing 210 and the second housing 220. In yet another embodiment, the coupling portion 230 can be in the form of a hinge, a hinge, a snap, a magnetic snap, a sticky snap, etc. provided on the first housing 210 and the second housing 220.

[0046] In another embodiment, the first coupling portion 231 is the first side wall of the first housing 210, the second coupling portion 232 is the second side wall of the second housing 220, and the first side wall and the second side wall are planes and can be correspondingly mated with each other. Optionally, the top surfaces of the first partition wall and the second partition wall are planes and can be correspondingly mated with each other. Optionally, an external fixing device (such as a rubber strip, a binding band, a rubber band, a rope, etc.) can be used to stick or tie the first housing and the second housing for further fixation.

[0047] The lengths of the first housing 110 and the second housing 120 are 15 - 30 cm, the wall thicknesses of the first side wall and the second side wall are 3 - 8 mm, and the inner diameter of the accommodation cavity 140 is 1 - 3 cm.

[0048] The materials of the first housing 210 and the second housing 220 are similar to those in Embodiment 1 and will not be elaborated here.

[0049] Embodiment 3

[0050] Using the breeding device described in Embodiment 1 or Embodiment 2 for leech cocoon breeding, it includes:

[0051] Soak the breeding device with water to prevent damage to the leeches caused by the dryness of the breeding device when putting in the leeches.

[0052] Open the first housing and the second housing of the breeding device, and put the leeches into the accommodation cavity. Generally, 1-2 leeches are put into one accommodation cavity.

[0053] Close the first housing and the second housing. The first housing and the second housing cooperate with each other through the engaging part, and stack multiple breeding devices; each breeding device can be further fixed by an external fixing device (such as adhesive tape, binding tape, rubber band, rope, etc.) before stacking.

[0054] Cover the stacked breeding devices and spray water regularly to keep the breeding devices moist but not drenched; among them, use water-retaining materials or soil for covering.

[0055] Generally, open the breeding device after 5-15 days, and take out the breeding leeches and cocoons respectively.

[0056] Thus, soil-less cocoon production of leeches can be realized, and soil-less breeding can be carried out indoors, outdoors or in an incubator, and there are no strict requirements for the location.

[0057] Use the above breeding device (made of clay) to conduct the following experiments:

[0058] Experiment 1: From April 19th to May 12th, 2019, 45 breeding leeches were put in, the average weight of the breeding leeches was about 20g, 228 cocoons were produced, the mortality rate of the breeding leeches was 8%, and the weight loss was 15%.

[0059] Experiment 2: From April 15th to May 10th, 2020, 200 breeding leeches were put in, the average weight of the breeding leeches was about 15g, 890 cocoons were produced, the mortality rate of the breeding leeches was 6%, and the weight loss was 18%.

[0060] Using the above breeding device, the loss of cocoons is very small, generally not more than 5%.

[0061] From the above data, it can be found that by using the above breeding tube and breeding method, the influence of soil-borne diseases is avoided from the source, the labor cost of digging egg cocoons is reduced, the mortality rate and weight loss of breeding leeches are also greatly reduced, and the number of obtained cocoons is also relatively large.

[0062] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations according to the concept of the present invention without creative labor. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art should be within the protection scope determined by the claims.

Claims

1. A breeding device, characterized in that, The breeding device is used for leeches to produce cocoons, and includes a first housing, a second housing and a coupling part; The first housing and the second housing cooperate with each other through the coupling part to form at least one accommodation cavity, which is arranged to accommodate leeches; the length of the accommodation cavity is greater than the width; at least one ventilation hole is provided at at least one end of the first housing and / or the second housing in the length direction of the accommodation cavity; the first housing and the second housing have end walls at the ends, and at least one ventilation hole is provided on the end walls, so that the leeches placed in the breeding device can breathe normally. The diameter of the ventilation hole is 2-5 mm; the lengths of the first housing and the second housing are 15-30 cm, the wall thickness is 3-8 mm, and the inner diameter of the cross section of one accommodation cavity is 1-3 cm; the first housing and the second housing are made of breathable and water-retaining materials; the breathable and water-retaining material is clay; The coupling part includes a first coupling part and a second coupling part; the first coupling part is the first side wall of the first housing, and the second coupling part is the second side wall of the second housing. The first side wall and the second side wall are planes and can correspond to each other; alternatively, the first coupling part is a protrusion or groove on the first side wall of the first housing, and the second coupling part is a groove or protrusion on the second side wall of the second housing, and the groove and the protrusion can cooperate with each other; Alternatively, the coupling part is a snap fastener, a magnetic snap fastener or a sticky fastener; During use, put the leeches into the accommodation cavity, and cooperate the first housing and the second housing with each other through the coupling part; each breeding device is further fixed by an external fixing device and then stacked; Cover and spray water regularly to keep the breeding device moist; Open the breeding device after a preset time, and take out the parent leeches and cocoons.

2. The breeding device according to claim 1, wherein, The cross section of the first housing and the second housing is at least one rectangle, half ellipse, semi-circle or half hexagon.

3. A method for leeches to produce cocoons, characterized in that, Use the breeding device according to any one of claims 1-2; Put the leeches into the accommodation cavity, and cooperate the first housing and the second housing with each other through the coupling part; Cover and spray water regularly to keep the breeding device moist; Open the breeding device after a preset time, and take out the parent leeches and cocoons.

4. The leech cocoon production method according to claim 3, characterized in that, Place 1-2 leeches in one accommodation cavity.

5. The method for leeches to produce cocoons according to claim 3, before putting the leeches into the accommodation cavity, first soak the breeding device with water.

6. The method for leeches to produce cocoons according to claim 3, place the breeding device with leeches placed therein indoors, outdoors or in an incubator.

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