CN111838058A - A kind of high-efficiency broodstock hatching device and experimental method of Crayfish - Google Patents

Abstract

The invention discloses a high-efficiency egg hatching device and an experimental method for Crayfish. One side of the box is provided with a water inlet at a higher position, and the bottom of the other side of the box is provided with a water outlet. The microporous oxygenation equipment includes an oxygen inlet. Tube and microporous oxygen-enhancing bubble strip, the outside of the box is provided with an oxygen inlet pipe, the bottom of the box is provided with a micro-porous oxygen-enhancing bubble strip, the bottom of the box is provided with a PVC square tube, and the inner walls of both sides of the PVC square tube are provided with first storage The first storage rack on both sides of the PVC square tube is provided with a second storage rack, and the first storage rack and the second storage rack are provided with plant fibers; the invention can increase the number of egg-carrying shrimp per unit area through the multi-layer egg-holding incubator. It can also use limited space to expand the activity area of juvenile shrimp. The device is convenient to transport and easy to operate. It can improve the breeding habitat of egg-carrying shrimp and fry, and improve the hatching rate of eggs, hatching volume per unit area and fry quality.

Description

A kind of high-efficiency broodstock hatching device and experimental method of Crayfish

technical field

The invention relates to the technical field of aquaculture, in particular to a high-efficiency brooding and hatching device and an experimental method of Crayfish.

Background technique

Crayfish belong to Crustacea, Decapodidae. Due to the rapid development of crayfish catering industry in recent years, the market demand for Crayfish is large. At present, only in Hubei Province, the demand for crayfish seed has reached 100 However, there is a shortage of seed in the existing market, resulting in high seed prices and high breeding costs for fishermen, limiting the development of the Crayfish breeding industry;

The main reasons for the lack of seed supply in the existing Crayfish seed farms are the low capacity of brood shrimp per unit of water, generally no more than 16/m2, and the low hatchability and emergence rate of brood shrimp. Crayfish are all active at the bottom of the water body, but the bottom area of a breeding site is limited, and the upper area of the breeding site is almost idle, wasting resources. In order to initially solve this problem, most farmers will plant water in cement ponds. Plants such as cucurbits provide a way for Crayfish to use more space inside the cement pond, but planting a large number of water hyacinths will lead to excessive oxygen consumption in the pond at night, hypoxia at the bottom of the breeding water, and egg-bearing shrimp and its abdomen. The egg mass is hypoxic, which affects the survival rate and hatching rate of the broodstock. If only a small amount of aquatic plants are planted, the effect of making full use of the breeding space will not be achieved, and during the incubation period of Crayfish eggs, it is easy to appear between the individuals of Crayfish. The phenomenon of mutual attack, therefore, the present invention proposes a high-efficiency broodstock hatching device and an experimental method for P. cruzi to solve the problems existing in the prior art.

SUMMARY OF THE INVENTION

In view of the above-mentioned problems, the purpose of the present invention is to propose a high-efficiency egg-holding hatching device and experimental method for Procrayfish cruzi, which can increase the number of units in an incubator formed by stacking multi-layer PVC square tubes and the experimental method. The size of the PVC square tube is suitable for the size of the egg-bearing shrimp, which can not only effectively use the space, but also allow the egg-bearing shrimp to pass freely; through the first shelf and The plant fibers on the second shelf can provide more space for juveniles to move, which is convenient for a large number of juveniles to climb and improve the habitat for seedling cultivation; multiple incubators are conveniently connected through short tubes with variable diameters to construct an open multi-layer structure. It is convenient for pre-transportation, installation device and post-recovery device; the setting of mesh can prevent the loss of female shrimp in the early stage of hatching, facilitate the outflow of residual bait and feces, and prevent the loss of juvenile shrimp when washing foreign objects in the box in the later stage of hatching.

In order to achieve the purpose of the present invention, the present invention is realized through the following technical solutions: a high-efficiency broodstock hatching device and an experimental method of Procterina cruzi, comprising a box body, a microporous oxygenation device and an incubator, and one side of the box body is relatively high. A water inlet is provided at the position, and a water outlet is arranged at the bottom of the other side of the box body. The microporous oxygenation equipment includes an oxygen inlet pipe and a microporous oxygenation bubble strip. An oxygen inlet pipe is provided outside the box body. The bottom of the box is provided with microporous oxygen-enhancing bubble strips, the incubator includes a PVC square tube, a first rack, a second rack and plant fibers, and the bottom of the box is provided with a short tube with a variable diameter. PVC square pipes are arranged on both sides of the short diameter pipe, first storage racks are arranged on the inner walls of both sides of the PVC square pipe, and second storage racks are arranged below the first storage racks on the inner walls of the PVC square pipes. Plant fibers are arranged on the first shelf and the second shelf.

A further improvement is that: a handle is arranged above the PVC square pipe, a variable diameter short pipe is arranged between the adjacent two groups of the incubators and is detachably connected through the variable diameter short pipe, and the incubators are stacked by a plurality of PVC square pipes. The PVC square pipes are stacked in an isosceles triangle. The length, width and height of the PVC square pipes are 20cm, 10cm and 10cm respectively. Each layer of the PVC square pipes passes through the upper/lower and left/right side PVC square pipes. Super glue connection.

A further improvement lies in: the shape of the short reducing pipe is that one end is large and the other is small; The end of the PVC square pipe is embedded and connected.

A further improvement is that: the water outlet is provided with a mesh, the mesh side length of the mesh in the early stage of incubation is 1.5 cm, and the mesh side length of the mesh in the late incubation period is 0.3 cm.

A further improvement is that: the first shelf and the second shelf are fixed to the inner walls on both sides of the PVC square tube by super glue, the first shelf and the second shelf are respectively composed of four groups of short boards, and the plant fiber The four sets of short boards of the first shelf and the second shelf are horizontally layered and fixed between the short boards by super glue. The length and width of the short boards of the first shelf are 5cm and 2cm, and the second shelf is short The length and width of the board are 2cm and 2cm, the first shelf is arranged at a distance of 8cm from the bottom of the PVC square pipe, and the second shelf is arranged at a distance of 6cm from the bottom of the PVC square pipe.

A further improvement is that: the bottom of the box body is inclined to the water outlet, and the inclination angle is not greater than 10°.

An experimental method for efficient brooding and hatching of Crayfish, comprising the following steps:

Step 1. Put the female shrimp of Procrayfish into the device;

Step 2: Sprinkle a sufficient amount of feed evenly in the whole tank every day, change the water every 72 hours, and flow the residual bait and feces to the water outlet and discharge the box through the inclined angle of the bottom of the box and the water flow of the water inlet and outlet. The amount of water exchange is 1/3 of the volume of the box;

Step 3, when all the juvenile shrimp are out of the membrane, the broodstock that has completed the hatching of the eggs are captured, transferred to the sterilized cement pond to strengthen the cultivation, and then sold;

Step 4: Continue primary cultivation of the hatched juveniles in the device.

The beneficial effects of the invention are as follows: the incubator formed by stacking multiple layers of PVC square pipes can increase the capacity of the brood shrimp per unit area, improve the hatching rate of eggs and the hatching quantity per unit area, and the size of the PVC square pipe is suitable for the brood shrimp The size of the juvenile can not only effectively use the space, but also allow the egg-bearing shrimp to pass freely; the plant fibers on the first shelf and the second shelf can provide more space for the juveniles to move, which is convenient for a large number of juveniles to climb and improve the seedlings. seed breeding habitat; multiple incubators are conveniently connected through variable-diameter short pipes to construct an open multi-layer structure, which is convenient for early transportation, installation of devices and post-recovery devices; the setting of mesh can prevent the loss of female shrimp in the early incubation period, and is convenient for residual shrimp. The outflow of bait and feces can prevent the loss of juvenile shrimp when washing foreign bodies in the box in the later stage of incubation.

Description of drawings

Fig. 1 is the main body diagram of the present invention.

Figure 2 is a front view of the incubator of the present invention.

Figure 3 is a side view of the incubator of the present invention.

Figure 4 is a structural diagram of the PVC square pipe of the present invention.

Among them: 1. Box body; 2. Microporous oxygenation equipment; 3. Incubator; 4. Water inlet; 5. Water outlet; 6. Oxygen inlet pipe; 7. Microporous oxygenation bubble strip; 8. PVC square pipe; 9. Short tube with variable diameter; 10. The first shelf; 11. The second shelf; 12. Plant fiber; 13. Handle; 14. Mesh.

Detailed ways

In order to deepen the understanding of the present invention, the present invention will be described in further detail below with reference to the embodiments. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

Example 1

According to Figures 1, 2, 3, and 4, the present embodiment provides a high-efficiency broodstock hatching device and an experimental method for P. cruzi, comprising a box 1, a microporous oxygenation device 2 and an incubator 3. The box 1. A water inlet 4 is arranged at a higher position on one side of the box body 1, and a water outlet 5 is arranged at the bottom of the other side of the box body 1. The microporous oxygenation device 2 includes an oxygen inlet pipe 6 and a microporous oxygenation bubble bar 7. , the box body 1 is provided with an oxygen inlet pipe 6 outside, the inner bottom of the box body 1 is provided with a microporous oxygen-enhancing bubble strip 7, and the incubator 3 includes a PVC square tube 8, a first shelf 10, and a second shelf. The frame 11 and the plant fiber 12, the inner bottom of the box body 1 is provided with a variable diameter short pipe 9, the two sides of the variable diameter short pipe 9 are provided with PVC square pipes 8, and the inner walls of the PVC square pipe 8 are provided with first A storage rack 10, a second storage rack 11 is provided below the first storage rack 10 on the inner walls of the PVC square pipe 8, and plant fibers 12 are arranged on the first storage rack 10 and the second storage rack 11, so The length, width and height of the box body 1 are respectively 200cm, 100cm and 60cm, and the spacing distance between the microporous oxygen-enhancing bubble strips 7 at the bottom of the box body 1 is 50cm.

A handle 13 is arranged above the PVC square tube 8, and a variable diameter short tube 9 is arranged between the adjacent two groups of the incubators 3 and is detachably connected through the variable diameter short tube 9. A single said incubator 3 consists of a plurality of five layers. Five rows of PVC square pipes 8 (except the topmost layer) are stacked in an isosceles triangle. Each layer has two PVC square pipes 8. The length, width and height of the PVC square pipes 8 are respectively 20cm, 10cm and 10cm. The PVC square pipe 8 is connected with the PVC square pipes 8 on the upper/lower layers and the left/right side by super glue.

The shape of the variable diameter short tube 9 is that one end is large and the other end is small. The ends of the PVC square pipes 8 are embedded and connected.

The water outlet 5 is provided with a mesh piece 14, the mesh side length of the mesh piece 14 is 1.5cm in the early stage of incubation, and the mesh side length of the mesh piece 14 is 0.3cm in the later stage of incubation.

The first storage rack 10 and the second storage rack 11 are fixed to both sides of the PVC square pipe 8 by super glue. The first storage rack 10 and the second storage rack 11 are respectively composed of four groups of short boards. The fibers 12 and the four groups of short boards of the first shelf 10 and the second shelf 11 are fixed between the short boards by super glue in horizontal layers. The length and width of the short boards of the first shelf 10 are 5 cm and 2 cm. The length and width of the short board of the second shelf 11 are 2 cm and 2 cm. The first shelf 10 is arranged at a distance of 8 cm from the bottom of the PVC square pipe 8 , and the second shelf 11 is arranged at a distance of 6 cm from the bottom of the PVC square pipe 8 .

The bottom of the box body 1 is inclined to the water outlet 5 and the inclination angle is not greater than 10°.

Scrub the device before use, soak it in a low-concentration potassium permanganate solution for one day for disinfection, and wash it with clean water for more than 3 times, then soak it in seedling water for 1 day, wash it and put it in water for later use, in August and September , When the crayfish is in the mating period, put the female shrimp into the device, sprinkle a sufficient amount of feed evenly in the whole pool every day, change the water every 72 hours, and the water change amount is 1/3 of the volume of the box 1. 1. The angle of inclination of the bottom and the flow of water in and out, flush the residual bait and feces to the water outlet 5 and discharge the device. When juveniles hatch, they can be fed with egg yolks with high solubility in the box 1. High-protein bait, when all the juvenile shrimp have emerged from the membrane and can be separated from the mother, the broodstock that has completed the hatching can be caught, transferred to the sterilized cement pond to strengthen the cultivation, and then sold. Juveniles can continue to be reared in the incubator to avoid stress and mortality caused by environmental changes.

After the primary cultivation of juvenile shrimp is completed, pull apart the PVC square pipes 8 connected in the two incubators 3, hold the handle 13 and apply force to make the incubator 3 shake in the water to force the juvenile shrimp to leave the PVC square pipe 8 and enter the water body, and then put the incubator 3 Removed, cleaned, and reserved for next use. Young shrimp can be caught and sold, or they can continue to be cultivated until they become adults and then sold.

Example 2

The high-efficiency egg hatching device for Crayfish in this embodiment is the same as the device described in Embodiment 1.

The incubator of the present invention can also be applied to cement pools or ponds. According to the height and width of the cement pools or ponds, the number of layers and columns of 8 PVC square pipes in a single incubator 3 is designed, and the number of layers of PVC square pipes 8 in the incubator 3 is designed. The assembly is completed by super glue, and the appropriate amount of plant fibers 12 are placed on the first rack 10 and the second rack 11 for fixing. According to the area of the cement pond or pond, the number of incubators 3 to be placed in the breeding site is selected. The diameter short pipe 9 connects a plurality of incubators 3, and super glue can also be applied on the inner wall and outer wall of the variable diameter short pipe 9 to strengthen the connection strength between the incubators 3, and connect the long rope at the top handle of the PVC square pipe 8, Slowly put the incubator 3 into the breeding ground by means of a long rope.

Put the female shrimp into the breeding pond, and sprinkle enough feed evenly in the whole pond every day. After the primary cultivation of the juvenile shrimp is completed, gradually pull the multiple incubators 3 away from the water surface through the long rope connected to the handle, clean it, and leave it for the next time. Once used, juvenile shrimp can be caught and sold through ground cages.

The high-efficiency egg-carrying hatching device and experimental method for Crayfish can increase the capacity of the egg-carrying shrimp per unit area, and improve the hatching rate of eggs and the hatching volume per unit area. The size of 8 is suitable for the size of the egg-bearing shrimp, which can effectively utilize the space and allow the egg-bearing shrimp to pass freely; the plant fiber 12 on the first rack 10 and the second rack 11 can provide more space for juvenile shrimp to move. , it is convenient for a large number of juveniles to cling to and improve the habitat for seed cultivation; multiple incubators 3 are conveniently connected through variable diameter short pipes 9 to construct an open multi-layer structure, which is convenient for pre-transportation, installation devices and post-recycling devices; In the early stage of incubation, the loss of female shrimp can be prevented, and the outflow of residual bait and feces can be facilitated. In the later stage of incubation, the loss of juvenile shrimp can be prevented when foreign objects in the box 1 are washed.

The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have Various changes and modifications fall within the scope of the claimed invention. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims (7)

1. The utility model provides a high-efficient ovum hatching apparatus that embraces of procambarus clarkia which characterized in that: comprises a box body (1), micropore oxygenation equipment (2) and an incubator (3), wherein a water inlet (4) is arranged at a higher position of one side of the box body (1), a water outlet (5) is arranged at the bottom of the other side of the box body (1), the micropore oxygenation equipment (2) comprises an oxygen inlet pipe (6) and a micropore oxygenation bubble strip (7), the oxygen inlet pipe (6) is arranged outside the box body (1), the micropore oxygenation bubble strip (7) is arranged at the bottom in the box body (1), the incubator (3) comprises a PVC square pipe (8), a first storage rack (10), a second storage rack (11) and plant fibers (12), the PVC square pipe (8) is arranged at the bottom in the box body (1), the first storage rack (10) is arranged on the inner walls of two sides of the PVC square pipe (8), the second storage rack (11) is arranged below the first storage rack (10) on the inner walls of two sides of, plant fibers (12) are arranged on the first shelf (10) and the second shelf (11).

2. The efficient hatching device for the spawning of the procambarus clarkii according to claim 1, wherein: PVC side pipe (8) top is equipped with handle (13), and is adjacent two sets of be equipped with reducing nozzle stub (9) between incubator (3) and can dismantle the connection through reducing nozzle stub (9), incubator (3) are piled up by a plurality of PVC side pipe (8) and are formed, PVC side pipe (8) are isosceles triangle and pile up, PVC side pipe (8) length and width height is 20cm, 10cm respectively, every layer PVC side pipe (8) with its upper/lower floor, left/right side PVC side pipe (8) pass through the super glue and are connected.

3. The efficient hatching device for the spawning of the procambarus clarkii according to claim 1, wherein: the shape of the reducing short pipe (9) is that one end is large and the other end is small, the large end of the reducing short pipe (9) is tightly sleeved with the end of the PVC square pipe (8), and the small end of the reducing short pipe (9) is connected with the end of the PVC square pipe (8) in an embedded manner.

4. The efficient hatching device for the spawning of the procambarus clarkii according to claim 1, wherein: the water outlet (5) is provided with a net piece (14), the side length of the mesh of the net piece (14) in the early stage of incubation is 1.5cm, and the side length of the mesh of the net piece (14) in the late stage of incubation is 0.3 cm.

5. The efficient hatching device for the spawning of the procambarus clarkii according to claim 1, wherein: first supporter (10) and second supporter (11) are fixed through powerful glue and PVC side pipe (8) both sides inner wall, first supporter (10) and second supporter (11) constitute by four short slabs respectively, plant fiber (12) are fixed between the short slab through powerful glue horizontal layering with the four short slabs of first supporter (10) and second supporter (11), first supporter (10) short slab length width is 5cm and 2cm, second supporter (11) short slab length width is 2cm and 2cm, first supporter (10) sets up in 8cm department apart from PVC side pipe (8) bottom, second supporter (11) set up in 6cm department apart from PVC side pipe (8) bottom.

6. The efficient hatching device for the spawning of the procambarus clarkii according to claim 1, wherein: the bottom of the box body (1) is arranged in an inclined manner towards the water outlet (5), and the inclined angle is not more than 10 degrees.

7. The method for the efficient incubation experiment of the eggs of the procambarus clarkii according to claim 1, which is characterized by comprising the following steps:

putting the female procambarus clarkii into the device;

step two, uniformly sprinkling enough feed in the whole pond every day, changing water every 72 hours, and flowing residual bait and excrement to a water outlet (5) through the inclined angle of the bottom of the box body (1) and water inflow and drainage to be discharged out of the box body (1), wherein the water changing amount is 1/3 of the volume of the box body (1);

step three, when all the juvenile shrimps are out of the film, catching the parent shrimps which are already hatched with eggs, transferring the parent shrimps into a sterilized cement pond for reinforced cultivation, and selling the parent shrimps;

and step four, continuously carrying out primary cultivation on the hatched young shrimps in the device.

Images