CN111670844A - Drifting fish egg hatching method and hatching device - Google Patents
Drifting fish egg hatching method and hatching device Download PDFInfo
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- CN111670844A CN111670844A CN202010718576.7A CN202010718576A CN111670844A CN 111670844 A CN111670844 A CN 111670844A CN 202010718576 A CN202010718576 A CN 202010718576A CN 111670844 A CN111670844 A CN 111670844A
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- 230000012447 hatching Effects 0.000 title claims abstract description 79
- 241000251468 Actinopterygii Species 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 112
- 235000013601 eggs Nutrition 0.000 claims abstract description 62
- 230000008602 contraction Effects 0.000 claims abstract description 21
- 238000011010 flushing procedure Methods 0.000 claims abstract description 12
- 238000007667 floating Methods 0.000 claims description 18
- 239000000725 suspension Substances 0.000 claims description 12
- 239000012528 membrane Substances 0.000 claims description 10
- 239000004575 stone Substances 0.000 claims description 10
- 238000002955 isolation Methods 0.000 claims description 7
- 238000003776 cleavage reaction Methods 0.000 claims description 3
- 230000007017 scission Effects 0.000 claims description 3
- 230000009182 swimming Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000004083 survival effect Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 238000011534 incubation Methods 0.000 description 6
- 238000005273 aeration Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 230000036284 oxygen consumption Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 238000009395 breeding Methods 0.000 description 2
- 230000001488 breeding effect Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 241000252185 Cobitidae Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241001518462 Cubiceps gracilis Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000003975 animal breeding Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000005574 cross-species transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000035755 proliferation Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K61/00—Culture of aquatic animals
- A01K61/10—Culture of aquatic animals of fish
- A01K61/17—Hatching, e.g. incubators
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
- A01K63/042—Introducing gases into the water, e.g. aerators, air pumps
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Marine Sciences & Fisheries (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Zoology (AREA)
- Meat, Egg Or Seafood Products (AREA)
- Farming Of Fish And Shellfish (AREA)
Abstract
A drifting fish egg hatching device comprises a cylindrical barrel and a contraction barrel which is positioned below the cylindrical barrel, the top of the contraction barrel is communicated with the cylindrical barrel, the area of the bottom of the contraction barrel is smaller than that of the top of the contraction barrel, and the cylindrical barrel consists of an upper edge fixing ring, a lower edge fixing ring and a first annular gauze which surrounds the two fixing rings; the shrinkage cylinder consists of a shrinkage fixing ring positioned below the shrinkage cylinder and a second annular gauze which surrounds the shrinkage fixing ring and the lower edge fixing ring; the diameter of the contraction fixing ring is smaller than that of the lower edge fixing ring. By adopting the drifting fish egg hatching method and the hatching device, the flushing water flow can be adjusted according to different kinds of drifting fish eggs, so that the optimal effect is achieved, and the survival rate of the fish eggs is improved; the hatching device has simple manufacturing process, low manufacturing cost and convenient carrying.
Description
Technical Field
The invention belongs to the field of animal breeding, relates to a fish egg hatching technology, and particularly relates to a drifting fish egg hatching method and a hatching device.
Background
In the fish breeding process, the hatching of fish oosperms is a very key technical link, the quantity and the quality of the newly hatched fries are directly determined by the hatchability, and meanwhile, certain influence is also exerted on the later-stage fry breeding. The floating roe can grow naturally only under the conditions of certain dissolved oxygen and water temperature, the content of the dissolved oxygen in the water body is related to the flow velocity of water flow, and the roe is easy to sink to the bottom of the water to die due to too low flow velocity. Hatching of drifting fish eggs currently mainly adopts two ways: one is cement pool circular passage water flushing incubation; the other is hatching barrel hatching.
The cement annular pool hatching is an ideal imitated natural hatching mode, has the advantages of large capacity, controllable flow rate, convenient operation, long service life and the like, and has the defects of high cost, more occupied land resources and incapability of meeting the field work requirement. The hatching barrel is a hatcher which is used in more proliferation and releasing stations at present, and has the advantages of convenient grouping management and simple operation; the disadvantage is that the flow control of the hatching barrel can not meet the requirement of the fish eggs on the flow speed, and meanwhile, dead corners are easily formed in the barrel to cause fertilized egg accumulation and egg membrane damage, thereby causing fertilized egg loss.
Therefore, a hatching and hatching method is needed at present, which can ensure that the fish eggs are kept in a uniform suspension state in the whole hatching process and solve the problems of high oxygen consumption and easy breakage of drifting fish eggs.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention discloses a drifting fish egg hatching method and a hatching device.
The drifting fish egg hatching device comprises a cylindrical barrel and a contraction barrel, wherein the contraction barrel is positioned below the cylindrical barrel, the top of the contraction barrel is communicated with the cylindrical barrel, the area of the bottom of the contraction barrel is smaller than that of the top of the contraction barrel, and the cylindrical barrel consists of an upper edge fixing ring, a lower edge fixing ring and a first annular gauze surrounding the two fixing rings; the shrinkage cylinder consists of a shrinkage fixing ring positioned below the shrinkage cylinder and a second annular gauze which surrounds the shrinkage fixing ring and the lower edge fixing ring; the diameter of the contraction fixing ring is smaller than that of the lower edge fixing ring;
the hatching device also comprises an air inlet pipe fixed on the upper edge fixing ring, the tail end of the air inlet pipe is positioned below the plane where the lower edge fixing ring is positioned, and the tail end of the air inlet pipe is also suspended with a gas stone;
the hatching device also comprises a water inlet pipe fixed on the lower edge fixing ring, the water inlet end of the water inlet pipe is connected with a water pump, the water outlet end is positioned below the plane where the shrinkage fixing ring is positioned, and part of the water inlet pipe connected with the water outlet end is vertically upward;
and a suspension device and an air inlet pipe fixing device are further arranged on the upper edge fixing ring.
Preferably: the shrink cylinder is conical.
Preferably: the suspension device comprises a cross-shaped bracket with four ends fixed on the upper edge fixing ring and a plurality of hanging ropes with the end parts fixed on the four ends of the cross-shaped bracket respectively.
Preferably: the air inlet pipe fixing device comprises the cross-shaped support and a water inlet pipe hanging ring fixed at the cross point of the cross-shaped support.
Preferably: and an isolation net covers the upper part of the water outlet end of the water inlet pipe.
Preferably: and valves are arranged on the water inlet pipe and the air inlet pipe.
The invention also discloses a drifting fish egg hatching method, which comprises the following steps:
(1) placing the floating fish egg hatching device of any one of claims 1 to 5 in water, wherein the upper edge fixing ring is 5 cm higher than the water surface, and placing the floating fish eggs in the floating fish egg hatching device to hatch the fish eggs;
(2) from the cleavage period to the earlier stage of fry membrane removal, the flow of the drifting roe hatching device is controlled to be 7.5-10L/min, the water flushing period is 8-10 seconds, the water flushing time in each period is 55-65%, and the water is not flushed in the rest time;
(3) in the stage of stopping water-soluble membrane, when 3-7% of roes are hatched, closing a water inlet valve of the drifting roe hatching device, stopping the flow of water in the incubator, and waiting for the roes to freely sink and dissolve the membrane;
(4) after all the fry in the rest roes are hatched, opening a water inlet valve of the drifting roe hatching device, and setting the flow rate to be 4.5-6L/min to flush the fry;
(5) after the fry are in the horizontal swimming, the flow is reduced to be below 4L/min.
The floating fish egg hatching method and the hatching device have the following advantages that:
1. the applicability is strong, and the flushing flow can be adjusted according to different kinds of drifting roes so as to achieve the best effect and greatly improve the survival rate of the roes.
2. Simple manufacturing process, low manufacturing cost and convenient carrying.
3. According to the main characteristics and the hatching requirements of the drifting fish eggs, the invention simulates the hatching environment of the drifting fish eggs by the double means of backflushing flowing water at the bottom and adding air pipe aeration, so that the fish eggs are kept in a uniform suspension state in the whole hatching process, and the problems of high oxygen consumption and easy breakage of the drifting fish eggs in the hatching process are solved.
4. The aeration size can be controlled by adjusting the flow and frequency of water flow and adjusting the air valve, and the environmental requirements suitable for different types of drifting fish eggs and different incubation periods are created.
5. The bottom of the hatching device is connected with the water inlet pipe through the isolation net, so that fish eggs can be prevented from entering the water pipe when water is cut off, and loss is reduced.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the incubation device for floating roe according to the present invention;
the reference numbers in the figures refer to: 1-cylindrical barrel, 2-upper edge fixing ring, 3-lower edge fixing ring, 4-shrinkage barrel, 5-valve, 6-water inlet pipe, 7-hanging rope, 8-air stone, 9-isolation net, 10-water outlet end, 11-air inlet pipe, 12-cross bracket, 13-water inlet pipe hanging ring and 14-fish egg.
Detailed Description
The following provides a more detailed description of the present invention.
The drifting fish egg hatching device comprises a cylindrical barrel 1 and a contraction barrel 4 which is positioned below the cylindrical barrel 1 and the top of the contraction barrel is communicated with the cylindrical barrel 1, wherein the area of the bottom of the contraction barrel is smaller than that of the top of the contraction barrel, and the cylindrical barrel consists of an upper edge fixing ring 2, a lower edge fixing ring 3 and a first annular gauze which surrounds the two fixing rings; the shrinkage cylinder 4 consists of a shrinkage fixing ring positioned below the shrinkage cylinder and a second annular gauze which surrounds the shrinkage fixing ring and the lower edge fixing ring; the diameter of the contraction fixing ring is smaller than that of the lower edge fixing ring;
the hatching device also comprises an air inlet pipe 11 fixed on the upper edge fixing ring 2, the tail end of the air inlet pipe is positioned below the plane of the lower edge fixing ring 3, and a gas stone 8 is hung at the tail end of the air inlet pipe;
the hatching device also comprises a water inlet pipe 6 fixed on the lower edge fixing ring, the water inlet end of the water inlet pipe 6 is connected with a water pump, the water outlet end 10 is positioned below the plane where the contraction fixing ring is positioned, and part of the water inlet pipe connected with the water outlet end is vertically upward;
and the upper edge fixing ring 2 is also provided with a suspension device and an air inlet pipe fixing device.
When the device is used, the whole device is mostly immersed below the water surface of a static or flowing water pool, the upper edge fixing ring is usually higher than the water surface, so that roes are prevented from floating from an upper opening of the cylindrical barrel, the roes can be put in from the upper opening of the cylindrical barrel, and the whole device is suspended in water through the suspension device fixed on the upper edge fixing ring.
After the roe is put into, the water pump and the air pump are started, the air inlet pipe and the valve 5 on the water inlet pipe are opened, fresh water flows from the water inlet pipe 6 to enter a space formed by the shrinkage cylinder 4 and the cylindrical cylinder 1 through the water outlet end at the bottom of the shrinkage cylinder, the water pump pumps water under high pressure normally, and the water pump is connected with the water inlet pipe at the water outlet end in a vertical upward direction as shown in figure 1, so that the water flow at the water outlet end generates upward uniform flow velocity, and the roe 14 can be continuously driven upwards to float.
Meanwhile, air enters the lower part of the cylindrical barrel 1 through the air inlet pipe 11, and is inserted into the air stone 8 to be aerated through the air stone, so that the flow rate and the dissolved oxygen content in the hatching device are improved.
The drift fish egg can roll along with rivers and air current are automatic in the space that shrink section of thick bamboo 4 and cylindrical barrel 1 are constituteed, and the first annular gauze and the second annular gauze that surround shrink section of thick bamboo and cylindrical barrel can choose for use 60 meshes of gauze, and the permeability is good, and the mesh is less than the fish egg size by a wide margin, and can not make the fish egg spill over and the card scrapes on the mesh.
In one specific embodiment, the diameter of the bottom surface of the cylindrical cylinder body is 50cm, and the height of the column is 50 cm; the diameter of the upper bottom surface of the shrink cylinder part is 50cm, and the diameter of the lower bottom surface of the shrink cylinder part is 20 mm. The air inlet pipe is a hose with the caliber of 5mm, the air stone can be hung at the tail end of the air inlet pipe in a binding mode generally, the tail end of the air inlet pipe is inserted into the air stone, and the air inlet pipe is hung at the middle lower part in the cylindrical barrel body so that the height of the air inlet pipe can be changed by pulling the air inlet pipe to move up and down. The water inlet pipe can be an L-shaped pvc water pipe with the caliber of 20 mm.
In the embodiment shown in fig. 1, the suspension device comprises a cross frame 12 with four ends fixed on the upper edge fixing ring, and a plurality of hanging ropes with ends fixed on the four ends of the cross frame respectively.
For example, the upper edge fixing ring 2 is a steel ring with the diameter of 50cm, 2 steel bars with the length of 50cm are welded in a cross mode and positioned in the steel ring, 4 welding points of a cross support formed by the steel bars and the steel ring are equal circumferential quartering points of the steel ring, and the upper edge fixing ring is also a steel ring with the diameter of 50 cm.
Can respectively fix 1 latch closure on the circumference quartering point of last edge retainer plate, connect 1 string of ropes on 1 latch closure, 4 other ends of hanging rope 7 concentrate the couple that is fixed in the device top, make it pull open on vertical fully not have the fold, make the usable gravity that self receives of hatching apparatus drop-down, the vertical suspension is in the water.
In a preferred embodiment, the air inlet pipe can be fixed by using a cross bracket; the air inlet pipe fixing device comprises the cross-shaped support and a water inlet pipe hanging ring 13 fixed at the cross point of the cross-shaped support.
1 water inlet pipe hanging ring with the caliber larger than that of the air inlet pipe can be fixed at the cross welding position of the center of the cross-shaped bracket, the air inlet pipe is a hose with the caliber of 5mm, the air inlet pipe penetrates through the water inlet pipe hanging ring but is not fixed, and thus the height position of the air stone 8 at the tail end of the air inlet pipe in water can be adjusted through the telescopic air inlet pipe; the air inlet end is positioned outside the hatching device and is connected with the air inlet valve.
The whole incubation device adopts the means of flushing water from the bottom upwards and aerating air stone, so that fertilized fish eggs 14 can be carried to the upper part by water flow or floating bubbles, then slowly fall down under the action of self gravity, and periodically roll and float in the water of the incubation device for a long time, and the fertilized fish eggs do not sink to the bottom or dead corners; the water pipe and the air pipe can be provided with valves 5 to control the water supply and air supply quantity and adjust the up-and-down periodic movement speed of the fertilized eggs in the incubator.
The contracting cylinder can be in a circular truncated cone shape with a large upper part and a small lower part, the smaller bottom surface of the circular truncated cone can be made of a sealing material with a water through hole or a gauze, the water outlet end is arranged at a mesh in the center of the bottom surface, the surface of the water outlet end is covered with an isolation net 7, so that fish eggs are prevented from blocking the water outlet end or falling into the water outlet end when the water pump fails, and the isolation net can be a No. 10 gauze.
In the specific embodiment shown in fig. 1, the contracting cylinder 4 is tapered, the water outlet end is bound and fixed at the tapered bottom, the tapered shape can reduce the impact force of water flow on the bottom, the hatching device is fixed well through the fixed connection between the water inlet pipe and the tapered bottom, and particularly, the hatching device can be prevented from shaking greatly or even turning over laterally along with the water flow. After the separation net 7 is arranged to be conical, in order to prevent the roes from sinking and accumulating at the bottom of the cone, the separation net 7 should be arranged at a certain distance from the cone and have a certain area, so as to avoid the roes from accumulating, and the separation net 7 is usually arranged at a height of at least one quarter of the cone from the cone tip.
When the floating roe hatching device is used for hatching roes, the following modes can be adopted:
(1) placing the drifting fish egg hatching device in water, wherein the upper edge fixing ring is 5 cm higher than the water surface, and placing the drifting fish eggs in the drifting fish egg hatching device to hatch the fish eggs; the total volume of roe is generally no more than 20% of the cylindrical barrel of the hatching apparatus.
(2) From the cleavage period to the earlier stage of fry membrane removal, the flow of the drifting roe hatching device is controlled to be 7.5-10L/min, the water flushing period is 8-10 seconds, the water flushing time in each period is 55-65%, and the water is not flushed in the rest time; the fish eggs can float in the incubator in a regular and uniform distribution manner by periodically flushing water;
(3) in the stage of stopping water-soluble membrane, when 3-7% of roes are hatched, closing a water inlet valve of the drifting roe hatching device, stopping the flow of water in the incubator, and waiting for the roes to freely sink and dissolve the membrane;
(4) after all the fry in the rest roes are hatched, opening a water inlet valve of the drifting roe hatching device, and setting the flow rate to be 4.5-6L/min to flush the fry;
(5) after the fry swim horizontally, the flow is reduced to be below 4L/min, so that the situation that the water flows too much to cause the fry to swim by the top water is avoided, and the physical strength is consumed.
Experiments prove that the hatching method can improve the survival hatchability of the roe of the round-mouth copper fish from 35-45% to more than 70%; the hatching rate of the survival of the fish eggs of the long and thin loaches is improved from 30-35% to 55-65%.
The floating fish egg hatching method and the hatching device have the following advantages that:
1. the applicability is strong, and the flushing flow can be adjusted according to different kinds of drifting fish eggs so as to achieve the best effect.
2. Simple manufacturing process, low manufacturing cost and convenient carrying.
3. According to the main characteristics and the hatching requirements of the drifting fish eggs, the invention simulates the hatching environment of the drifting fish eggs by the double means of backflushing flowing water at the bottom and adding air pipe aeration, so that the fish eggs are kept in a uniform suspension state in the whole hatching process, and the problems of high oxygen consumption and easy breakage of the drifting fish eggs in the hatching process are solved.
4. The aeration size can be controlled by adjusting the flow and frequency of water flow and adjusting the air valve, and the environmental requirements suitable for different types of drifting fish eggs and different incubation periods are created.
5. The bottom of the hatching device is connected with the water inlet pipe through the isolation net, so that fish eggs can be prevented from entering the water pipe when water is cut off, and loss is reduced.
The foregoing is a description of preferred embodiments of the present invention, and the preferred embodiments in the preferred embodiments may be combined and combined in any combination, if not obviously contradictory or prerequisite to a certain preferred embodiment, and the specific parameters in the examples and the embodiments are only for the purpose of clearly illustrating the inventor's invention verification process and are not intended to limit the patent protection scope of the present invention, which is defined by the claims and the equivalent structural changes made by the content of the description of the present invention are also included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a drifting fish egg hatching apparatus which characterized in that: the device comprises a cylindrical barrel (1) and a contraction barrel (4) which is positioned below the cylindrical barrel (1) and the top of which is communicated with the cylindrical barrel, wherein the area of the bottom of the contraction barrel is smaller than that of the top of the contraction barrel, and the cylindrical barrel (1) consists of an upper edge fixing ring (2), a lower edge fixing ring (3) and a first annular gauze which surrounds the two fixing rings; the shrinkage cylinder (4) consists of a shrinkage fixing ring positioned below the shrinkage cylinder and a second annular gauze which surrounds the shrinkage fixing ring and the lower edge fixing ring; the diameter of the contraction fixing ring is smaller than that of the lower edge fixing ring (3);
the hatching device also comprises an air inlet pipe (11) fixed on the upper edge fixing ring (2), the tail end of the air inlet pipe is positioned below the plane where the lower edge fixing ring is positioned, and a gas stone (8) is hung at the tail end of the air inlet pipe (11);
the hatching device also comprises a water inlet pipe (6) fixed on the lower edge fixing ring, the water inlet end of the water inlet pipe (6) is connected with a water pump, the water outlet end (10) is positioned below the plane where the shrinkage fixing ring is positioned, and part of the water inlet pipe connected with the water outlet end (10) is vertically upward;
and the upper edge fixing ring (2) is also provided with a suspension device and an air inlet pipe fixing device.
2. The floating fish egg hatching device of claim 1 wherein: the shrinkage cylinder (4) is conical.
3. The floating fish egg hatching device of claim 1 wherein: the suspension device comprises a cross-shaped bracket (12) with four ends fixed on the upper edge fixing ring (2), and a plurality of suspension ropes (7) with the end parts fixed on the four ends of the cross-shaped bracket (12) respectively.
4. The floating fish egg hatching device of claim 3 wherein: the air inlet pipe fixing device comprises the cross-shaped support (12) and a water inlet pipe hanging ring (13) fixed at the cross point of the cross-shaped support.
5. A floating fish egg hatching apparatus in accordance with claim 1 or 2 wherein: an isolation net (9) is covered above the water outlet end (10) of the water inlet pipe.
6. The floating fish egg hatching device of claim 1 wherein: and valves (5) are arranged on the water inlet pipe and the air inlet pipe.
7. A drifting fish egg hatching method is characterized in that: the method comprises the following steps:
(1) placing the floating fish egg hatching device of any one of claims 1 to 5 in water, wherein the upper edge fixing ring is 5 cm higher than the water surface, and placing the floating fish eggs in the floating fish egg hatching device to hatch the fish eggs;
(2) from the cleavage period to the earlier stage of fry membrane removal, the flow of the drifting roe hatching device is controlled to be 7.5-10L/min, the water flushing period is 8-10 seconds, the water flushing time in each period is 55-65%, and the water is not flushed in the rest time;
(3) in the stage of stopping water-soluble membrane, when 3-7% of roes are hatched, closing a water inlet valve of the drifting roe hatching device, stopping the flow of water in the incubator, and waiting for the roes to freely sink and dissolve the membrane;
(4) after all the fry in the rest roes are hatched, opening a water inlet valve of the drifting roe hatching device, and setting the flow rate to be 4.5-6L/min to flush the fry;
(5) after the fry are in the horizontal swimming, the flow is reduced to be below 4L/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010718576.7A CN111670844B (en) | 2020-07-23 | 2020-07-23 | Method and device for hatching drifting fish eggs |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010718576.7A CN111670844B (en) | 2020-07-23 | 2020-07-23 | Method and device for hatching drifting fish eggs |
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| Publication Number | Publication Date |
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| CN111670844A true CN111670844A (en) | 2020-09-18 |
| CN111670844B CN111670844B (en) | 2024-05-28 |
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| CN202010718576.7A Active CN111670844B (en) | 2020-07-23 | 2020-07-23 | Method and device for hatching drifting fish eggs |
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| CN204104513U (en) * | 2014-09-29 | 2015-01-21 | 福建省淡水水产研究所 | A kind of novel roe hatching device |
| CN204362750U (en) * | 2014-12-15 | 2015-06-03 | 武汉市佳恒水产有限公司 | A kind of mandarin fish family selective breeding isolation hatching system |
| CN212232682U (en) * | 2020-07-23 | 2020-12-29 | 四川水利职业技术学院 | Drifting fish egg hatching device |
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2020
- 2020-07-23 CN CN202010718576.7A patent/CN111670844B/en active Active
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|---|---|---|---|---|
| CA2227438A1 (en) * | 1998-03-19 | 1999-09-19 | Gaetan Gs Soucy | In-stream incubator |
| CN201541590U (en) * | 2009-10-28 | 2010-08-11 | 广东海洋大学 | Novel fish hatcher |
| KR20120034490A (en) * | 2010-10-01 | 2012-04-12 | 대한민국(관리부서:국립수산과학원) | Counterflow type device for artificial incubation |
| CN102144597A (en) * | 2011-05-09 | 2011-08-10 | 中国水产科学研究院黄海水产研究所 | Hatching device and method for demersal spawns of marine fishes |
| CN204104513U (en) * | 2014-09-29 | 2015-01-21 | 福建省淡水水产研究所 | A kind of novel roe hatching device |
| CN204362750U (en) * | 2014-12-15 | 2015-06-03 | 武汉市佳恒水产有限公司 | A kind of mandarin fish family selective breeding isolation hatching system |
| CN212232682U (en) * | 2020-07-23 | 2020-12-29 | 四川水利职业技术学院 | Drifting fish egg hatching device |
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