Suspension type rumedodon septentrionalis fertilized egg attachment device and use method

Abstract

The invention relates to a suspension type rudon septentrionalis fertilized egg attachment device and a using method, and belongs to the technical field of aquaculture facilities, the attachment device comprises attachment basic bodies and a connecting rope, and a series of attachment basic bodies are connected together through the connecting rope; the attachment base body is composed of an attachment disc and an attachment net, the attachment net is fixed to the attachment disc, and a series of attachment bases are arranged and fixed to the connecting rope from small to large in diameter. The invention also provides a use method of the attachment device. When the device is used for collecting the fertilized eggs of the modestus septentrionalis, damage to the eggs is small, the collected eggs are clean, dead eggs and germs are few, and the hatching rate of the eggs can be remarkably increased.

Description

Technical Field

[0001] The invention belongs to the technical field of aquaculture facilities, and in particular to a hanging greenfin pufferfish fertilized egg attachment device and a use method thereof. Background Art

[0002] Greenfin pufferfish, also known as skinned fish and pufferfish, is an important economic fish species along the coast of my country. It has the advantages of fast growth, short breeding cycle and cleaning of cage attachments. Greenfin pufferfish has been fully artificially bred. In recent years, commercial fish breeding models have been formed, including near-shore-distant sea cage relay, offshore cage-land-based factory relay and north-south cage relay. It is estimated that the national market demand can reach 300,000 tons, with an output value of 30 billion yuan. The industry has a very broad prospect and has gradually become one of the key focuses of artificial breeding. The fertilized eggs of the green-finned horse-faced fish are sticky and sinking eggs. In addition, there is no additional fertilized egg adhesion in the spawning pond. In production, the fertilized eggs of the green-finned horse-faced fish will adhere to the bottom and wall of the spawning pond. When collecting, first put a net bag or a net cage at the drain outlet of the spawning pond, and then drain the spawning pond. During the drainage period, the bottom and wall of the pond are brushed with a soft brush. The fertilized eggs are discharged with the water and collected in the net bag or net cage. After washing, they can be laid for hatching. This collection method is time-consuming and labor-intensive. Most of the collected eggs are dead, and the mechanical damage to the eggs is great. The surface of the eggs is easily covered with impurities and feces on the bottom of the pond. At the same time, it is easy to carry bacterial diseases on the bottom of the pond, which reduces the hatching rate of the eggs. At the same time, the collected eggs are directly laid in the nursery pond. Dead eggs and eggs that failed to hatch are left in the nursery pond, which are easy to breed bacteria, deteriorate water quality, and increase the risk of nursery. In addition, it was found in production that the eggs of greenfin pufferfish mature in batches, and the parents lay eggs in small groups, close to the wall or bottom of the pond. If there are other complex structures, they will lay eggs around these structures. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a hanging green fin puffer fish fertilized egg attachment device to solve the defects of low hatching rate caused by many dead eggs and severe damage after the existing green fin puffer fish fertilized eggs are collected.

[0004] The present invention is implemented by the following technical solutions:

[0005] A hanging greenfin pufferfish fertilized egg attachment device comprises an attachment base body and a connecting rope, wherein a series of attachment base bodies are connected together by the connecting rope; the attachment base body consists of an attachment plate and an attachment net, the attachment net is fixed on the attachment plate, and a series of attachment bases are arranged from small to large in diameter and fixed on the connecting rope.

[0006] Furthermore, the attachment plate is circular, square or other shapes.

[0007] Furthermore, the mesh diameter of the attachment net is preferably 0.5 to 1.0 cm.

[0008] Furthermore, the attachment plate is circular, and preferably has a diameter of 20 to 60 cm.

[0009] Furthermore, in order to increase the attachment area, the attachment net is arranged in a wave shape on the attachment base and is fully covered with the attachment disk.

[0010] Furthermore, both ends of the connecting rope are respectively connected to traction ropes for fixing on the wall of the breeding pond.

[0011] Furthermore, a series of attachment basic bodies are arranged in parallel, and the connecting ropes are perpendicular to the plane of the attachment plates and perpendicular to the bottom of the breeding pond.

[0012] The present invention also provides a method for using the attachment device, which comprises arranging two fixing components on corresponding sides of a breeding pond, fixing a traction rope on the two fixing components, and arranging the attachment basic bodies along the direction of water flow, that is, the water flow in the breeding pond flows from the attachment basic body with the smallest diameter to the attachment basic body with the largest diameter; the eggs laid by the green-finned pufferfish flow with the water flow after being fertilized, and the fertilized eggs in the water body will adhere to the attachment basic bodies with different diameters in turn. After being collected, the entire attachment device is fixed in a hatching pond, and the water level of the hatching pond just submerges all the attachment nets.

[0013] The beneficial effects of the present invention compared with the prior art are as follows: the device of the present invention causes little damage to fish eggs, the collected fish eggs are clean, there are few dead eggs and pathogens, and the hatching rate of fish eggs can be significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The structural cross-sectional view of the device of the present invention

[0015] Figure 2 is a top view of a circular attachment plate;

[0016] 1. Attachment basic body, 2. Connecting rope, 3. Attachment plate, 4. Attachment net, 5. Square pool, 6. Fixed component, 7. Towing rope, 8. Ring, 9. Radial ribs. DETAILED DESCRIPTION

[0017] The technical solution of the present invention is further explained below by way of embodiments, but the protection scope of the present invention is not limited in any form by the embodiments.

[0018] Example 1

[0019] like Figure 1-2As shown, a hanging greenfin pufferfish fertilized egg attachment device comprises an attachment base body 1 and a connecting rope 2, wherein a series of attachment base bodies 1 are connected together by the connecting rope 2; the attachment base body 1 is composed of an attachment plate 3 and an attachment net 4, wherein the attachment net 4 is fixed on the attachment plate 3, and a series of attachment bases are arranged from small to large in diameter and fixed on the connecting rope 2.

[0020] As a specific embodiment, the attachment plate 3 is circular, with a ring 8 and radial ribs 9 in the middle for fixing the attachment net 4, and can also be square or other shapes.

[0021] As a specific embodiment, the mesh diameter of the attachment net 4 is 0.5 cm.

[0022] As a specific embodiment, the attachment plates 3 are circular, 6 in number, and the diameters are 20 cm, 30 cm, 40 cm, 50 cm, 60 cm, and 70 cm respectively.

[0023] As a preferred embodiment, in order to increase the attachment area, the attachment net 4 is arranged in a wave shape on the attachment base and fully covers the attachment plate 3 .

[0024] As a preferred embodiment, in order to increase the stability of the attachment base body 1, a plurality of connecting ropes 2 are provided between a series of attachment base bodies 1, and the plurality of connecting ropes 2 converge to one point and are connected to the traction rope 7.

[0025] A series of attachment basic bodies 1 are arranged in parallel, and the connecting ropes 2 are perpendicular to the plane of the attachment plates 3 and perpendicular to the bottom of the breeding pond.

[0026] Example 2

[0027] This embodiment uses the attachment device of Example 1 to collect fertilized eggs of green-finned pufferfish in a square pond 5. First, two relatively fixed components 6 are set on the corresponding two sides of the breeding pond. According to the width of the rectangular breeding pond, if multiple attachment devices need to be set, the corresponding number of fixed components 6 is required; in order to increase the stability of the attachment basic body 1, a plurality of connecting ropes 2 are arranged between a series of attachment basic bodies 1, and the plurality of connecting ropes 2 converge to one point and are connected to the traction rope 7, and the traction rope 7 is fixed on the two fixed components 6. The breeding pond is rectangular, the water inlet is fed, the central pipe is drained, and the water flow in the breeding pond rotates around the central pipe. The direction of the attachment basic body 1 from small to large is consistent with the direction of water flow rotation, that is, the water in the breeding pond is The flow flows from the attachment base body with the smallest diameter to the attachment base body with the largest diameter; it is found in production that green fin pufferfish like to lay eggs in places with fast flow speed and obstacles, so most green fin pufferfish lay eggs at the water inlet. After the eggs are fertilized, they rotate in the pool with the water flow. During the rotation, the fertilized eggs adhere to the attachment nets 4 of the attachment base bodies 1 with different diameters in turn. In each rectangular breeding pool, multiple attachment devices are arranged, so that the fertilized eggs in the water body can be almost completely collected. Most of the eggs scattered on the bottom of the pool are unfertilized dead eggs with no viscosity or poor viscosity, which are discarded; after a period of collection, the attachment device can be taken out by the traction rope 7, and the dead eggs and residual bait excrement can be washed away by shaking the attachment device during the period. The entire attachment device is put away, and the interior can be kept moist for a long time. The attachment device is then transferred to a hatching pool or hatching pond. Because the surface layer of the water body is rich in dissolved oxygen and has sufficient light, the entire attachment device can be completely immersed in the water body by adjusting the connecting ropes 2 at both ends. After the eggs are completely hatched, the hatching device can be taken out. This attachment device is more suitable for hatching ponds with larger areas and deeper water levels.

[0028] Example 3

[0029] This embodiment uses the attachment device of Example 1 to collect fertilized eggs of green-finned pufferfish in a circular pool. The drain port of the circular pool is located in the center of the pool, and the water is drained through the central drain pipe. When in use, first, four U-shaped rings are fixed on two opposite pool walls of the circular breeding pool. The height of the lower end fixing part of the U-shaped ring is slightly greater than the radius of the largest attachment disk 3, and the upper end fixing part is higher than the water level of the spawning pool. Then, the traction rope 7 first passes through the U-shaped ring at the lower end of the pool wall and then passes through the U-shaped ring at the upper end of the pool wall. The traction rope 7 is stretched to drive the entire attachment device to unfold, ensuring that the entire device is in a taut state. Finally, the two ends of the traction rope 7 are tied at the upper end U-shaped ring of the pool wall. The layout direction of the attachment device needs to face the water flow, that is, the attachment disk 3 should gradually become larger along the direction of the water flow. Two attachment devices should be arranged in the entire spawning pool, respectively located on both sides of the central drain pipe, and the layout directions are just opposite, so that the fertilized eggs will not escape to the outside of the attachment device. After a certain period of time, the attachment device can be taken out by the traction rope 7. During this period, the attachment device can be shaken to wash away dead eggs and residual bait and feces. The entire attachment device is contracted, and the interior can be kept moist for a long time. The attachment device is then transferred to a hatching pool or hatching pond. Because the surface layer of the water body is rich in dissolved oxygen and the light is sufficient, the traction ropes 7 at both ends are adjusted to allow the entire attachment device to be completely immersed in the water body. After the fish eggs are completely hatched, the hatching device can be taken out.

Claims

1. A hanging greenfin pufferfish fertilized egg attachment device, characterized in that: The attachment device comprises an attachment base body and a connecting rope, wherein a series of attachment base bodies are connected together by the connecting rope; the attachment base body comprises an attachment plate and an attachment net, wherein the attachment net is fixed on the attachment plate, and a series of attachment bases are arranged from small to large in diameter and fixed on the connecting rope.

2. The hanging greenfin pufferfish fertilized egg attachment device according to claim 1, characterized in that: The attachment plate is circular, square or other shapes.

3. The hanging greenfin pufferfish fertilized egg attachment device according to claim 1, characterized in that: The mesh diameter of the attachment net is preferably 0.5 to 1.0 cm.

4. The hanging greenfin pufferfish fertilized egg attachment device according to claim 1, characterized in that: The attachment plate is circular, and preferably has a diameter of 20 to 60 cm.

5. The hanging greenfin pufferfish fertilized egg attachment device according to claim 1, characterized in that: The attachment net is arranged in a wave shape on the attachment base and is covered with attachment disks.

6. The hanging greenfin pufferfish fertilized egg attachment device according to claim 1, characterized in that: Both ends of the connecting rope are respectively connected to traction ropes for fixing on the wall of the breeding pond.

7. The hanging greenfin pufferfish fertilized egg attachment device according to claim 1, characterized in that: A series of attachment basic bodies are arranged in parallel, and the connecting ropes are perpendicular to the plane of the attachment plates and perpendicular to the bottom of the breeding pond.

8. The method for using the attachment device according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: arranging two fixing components on two corresponding sides of a breeding pond, fixing a traction rope on the two fixing components, and arranging the attachment basic bodies along the water flow direction, that is, the water flow in the breeding pond flows from the attachment basic body with the smallest diameter to the attachment basic body with the largest diameter; the eggs laid by the green-finned pufferfish flow with the water flow after being fertilized, and the fertilized eggs in the water body will adhere to the attachment basic bodies with different diameters in sequence. After being collected, the entire attachment device is fixed in a hatching pond, and the water level of the hatching pond just submerges all the attachment nets.

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