CN113951185B - Drifting fish egg hatching method - Google Patents
Drifting fish egg hatching method Download PDFInfo
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- CN113951185B CN113951185B CN202111428480.8A CN202111428480A CN113951185B CN 113951185 B CN113951185 B CN 113951185B CN 202111428480 A CN202111428480 A CN 202111428480A CN 113951185 B CN113951185 B CN 113951185B
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- 241000251468 Actinopterygii Species 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 126
- 235000013601 eggs Nutrition 0.000 claims abstract description 58
- 238000011534 incubation Methods 0.000 claims description 33
- 239000002245 particle Substances 0.000 claims description 28
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 21
- 238000001514 detection method Methods 0.000 claims description 21
- 229910052760 oxygen Inorganic materials 0.000 claims description 21
- 239000001301 oxygen Substances 0.000 claims description 21
- 239000000700 radioactive tracer Substances 0.000 claims description 21
- 230000005540 biological transmission Effects 0.000 claims description 19
- 230000007246 mechanism Effects 0.000 claims description 19
- 238000005273 aeration Methods 0.000 claims description 15
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Classifications
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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
- A01K61/00—Culture of aquatic animals
- A01K61/10—Culture of aquatic animals of fish
-
- 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)
- Farming Of Fish And Shellfish (AREA)
Abstract
The invention discloses a drifting fish egg hatching method, which is characterized in that the artificial water body environment is an annular water channel, and thrust horizontally applied on the cross section of the water channel along the direction of the water channel pushes water flow to circularly flow and realize fish egg hatching. The invention has the advantages of better adjusting the water environment and improving the hatching effect of the fish eggs.
Description
Technical Field
The invention relates to the technical field of fish egg incubation and cultivation, in particular to a drifting fish egg incubation method.
Background
The drifting fish egg is the fish egg which has density similar to that of water, has no viscosity, is separated from each other and completes hatching along with water drifting state after production and insemination, such as the fish egg produced by black carp, grass carp, silver carp, bighead carp and the like. The hatching process of fish eggs has important significance for fish reproduction, not only directly influences the number and health condition of larval fish, but also influences the resource amount and species survival condition of fish. The drifting fish eggs need to move with water for tens of hours or even hundreds of hours from the fertilized eggs to the juvenile fish with swimming capability, and the distance can reach hundreds of kilometers in natural water bodies such as the upstream of Yangtze river. Therefore, the research on the incubation of the drifting fish eggs has important significance not only for the fish farming industry, but also for the river fish resource recovery.
At present, the artificial incubation mode of the drifting fish eggs mainly comprises incubation in an incubation barrel and incubation in an incubation loop. Hatching bucket size is indefinite, can customize the use according to actual need, adopts the mode of upwards flushing water from the bottom to make the roe constantly roll the hatching in aqueous from the bottom generally, has easy operation's advantage, but the bucket interior rivers flow direction confusion, can't determine the flow velocity size. The hatching loop has large capacity and good durability, and the working principle is that a plurality of equidirectional nozzles at the bottom in the loop spray water flow out, so that roes can be ensured to roll and float in the loop ceaselessly, but the roes cannot be ensured to be uniform everywhere and the turbulence degree of the water flow cannot be controlled.
For example, a drifting fish egg hatching device disclosed in CN111670844A and a drifting fish egg hatching device disclosed in CN210746713U are similar to the above-mentioned structure, that is, a container is used, and water is added or air is introduced to control the inside of the container to cause rotational flow, and then fish eggs are controlled to hatch in water flow. The method has the defects of low water flow control degree and poor hatching effect. The environmental factors influencing incubation of the drifting fish eggs include temperature, dissolved oxygen and the like, and more importantly, flow speed and flow state of water flow. Therefore, in the process of fish egg hatching, how to better simulate and obtain a water environment more favorable for hatching and improve the hatching effect becomes a problem to be further considered and solved.
Disclosure of Invention
Aiming at the defects of the prior art, the technical problems to be solved by the invention are as follows: how to provide a drifting fish egg hatching method which can better adjust the water environment so as to improve the fish egg hatching effect.
In order to solve the technical problems, the invention adopts the following technical scheme:
a drifting fish egg hatching method is characterized in that the artificial water body environment is an annular water channel, and thrust horizontally applied on the cross section of the water channel along the direction of the water channel pushes water flow to circularly flow so as to realize fish egg hatching.
Like this, wholly exert thrust through annular water course cross section and make its circulation flow, can simulate actual river course rivers better and be the whole characteristics that flow forward of rivers in the cross section direction, the flow condition of rivers is more stable, and is even, does not have the dead angle, accords with more with the river course actual rivers condition, has improved the hatching effect to the roe.
Further, in the hatching process, the temperature of the water flow is regulated and controlled to be at a proper temperature to realize hatching. So as to better improve the hatching effect. The suitable temperature can be obtained by measuring the actual hatching environment of the fish eggs or by experiments.
Further, in the hatching process, the oxygen content of the water flow is aerated and adjusted, so that the water flow is hatched under the appropriate oxygen capacity. So as to better improve the hatching effect. The appropriate oxygen capacity may be obtained by measuring the actual hatching environment of the roe or by experiment.
Further, during the hatching process, the degree of turbulence of the water flow is adjusted to enable the water flow to have enough turbulence and hatching is carried out. So as to better improve the hatching effect. The turbulence amount of the water body can be obtained by measuring the actual hatching environment condition of the fish eggs or by experiments, and parameters such as turbulence intensity, reynolds number or turbulence energy can be used as judgment index parameters.
Further, the method is realized by adopting the fish egg hatching device which comprises a hatching groove which is in a horizontal annular shape as a whole, wherein a push plate is arranged in the hatching groove along the cross section direction, and the push plate is connected with a circulating motion control mechanism and can be driven to do circulating motion along the annular shape of the hatching groove.
Like this, the push pedal is driven and is done annular cyclic motion along hatching the groove, wholly promotes rivers from the cross section direction and does cyclic motion in annular hatching the groove, can simulate the actual river course well and be the whole characteristics that flow forward on the cross section direction, and with the river course actual water flow condition accord with more, rivers are more stable even, have improved the hatching effect of roe.
Furthermore, the hatching tank comprises two opposite semicircular sections and two straight line sections connected between the two semicircular sections, the circulating motion control mechanism comprises two driving discs which are horizontally arranged at the upper ends of the inner circles of the two semicircular sections in a matching manner, a driving belt is sleeved on the driving discs, the upper end of the push plate is connected to the driving belt through a transversely arranged connecting rod in an installing manner, and at least one driving disc is connected with a motor.
Therefore, the motor drives the transmission disc to rotate, and drives the push plate to circularly move along the hatching tank through the transmission belt to push water flow to circularly flow. Meanwhile, the motor device is positioned above the hatching tank, so that the adverse effect of motor vibration on fish egg hatching is avoided.
Further, the transmission disc is a chain wheel, and the transmission belt is a chain. Thus, the control is more reliable and accurate.
Further, the motor is fixed on a mounting frame of a portal frame structure. This allows a better fixation of the motor.
Further, a protective sleeve is arranged outside the motor. This may be better waterproof.
Furthermore, a downward supporting rod is arranged below the middle part of the transmission disc, and the transmission disc is rotatably arranged on the supporting rod. Therefore, the support can be better realized, and the stability is ensured.
Furthermore, a water inlet and a water outlet are arranged on the hatching tank. Thus, water can be fed and discharged more conveniently. During implementation, the dense nets are arranged at the water inlet and the water outlet, so that the loss of fish eggs can be prevented. Meanwhile, the water inlet is connected with the water pump through a water inlet pipeline, so that water pumping and water feeding are facilitated.
Further, the hatching tank is integrally fixed on a mounting table. Thus, the operation and observation are more convenient.
Furthermore, the hatching tank is integrally made of transparent organic glass materials. Therefore, the observation is more convenient, and the hardness and the quality of the material can be ensured.
Furthermore, a camera is arranged outside the hatching tank and opposite to the hatching tank. This facilitates the observation and recording of hatching processes and data by means of a camera.
Furthermore, the fish egg hatching device also comprises a control and regulation system, and the control and regulation system comprises a temperature control device and an aeration device which are arranged on the hatching tank; the temperature control device, the aeration device, the temperature sensor and the dissolved oxygen detection sensor are respectively connected with the control center.
The control and regulation system can detect the water flow temperature and regulate the water temperature through the temperature control device, can detect the dissolved oxygen in water and control the dissolved oxygen concentration in water through the aeration device, so that the dissolved oxygen and the dissolved oxygen are both in a range suitable for hatching, and the hatching effect is better improved.
Furthermore, an adjusting groove is fixedly arranged outside one side of the incubation groove, a communication gap is arranged between the adjusting groove and the incubation groove to enable the interiors of the adjusting groove and the incubation groove to be communicated, and the temperature control device and the aeration device are positioned in the adjusting groove.
Therefore, the influences of the temperature control device and the aeration device on the water body flowing and the fish egg hatching can be better reduced.
Further, the adjusting tank is positioned at the position of a turn outside the hatching tank.
Therefore, the water body exchange inside the two is more facilitated.
Furthermore, the control and regulation system also comprises a water flow speed detection device, the water flow speed detection device is connected with a control center, and the control center is connected with the motor. In this way, the water flow rate can be better detected and guaranteed to be the desired rate.
Further, the front side surface of the push plate is provided with a layer of elastic material.
Thus, damage to the roe by impact can be better avoided.
Furthermore, the push plate is provided with a plurality of through holes.
Therefore, partial water flow can flow through the through holes, the water body disturbance degree of the adjacent area positions of the front side and the rear side of the push plate is reduced, the water body environments of the front side and the rear side of the push plate and the rest area positions of the incubation groove are more consistent, and the incubation is more stable. Meanwhile, the water flow can form turbulent flow after passing through the through holes, so that the simulation of the actual water environment of a river channel is facilitated, and the improvement of the hatchability of fish eggs is facilitated.
Further, the push plate is detachably connected with the circulating motion control mechanism. Like this, can set up the push pedal of multiunit difference through hole shape, the convenient push pedal that has different shape clearing holes of changing as required to adjust the water current degree of disorder, make it more be favorable to improving the hatchability of roe. During concrete implementation, the connecting screw rods with symmetrical threads are horizontally arranged on one side of the upper end of the push plate and one side of a transmission belt of the circulating motion control mechanism respectively, and then the detachable connection is realized by means of a matched connecting nut.
Further, the push plates are arranged in groups, and each group of push plates comprises a first push plate and a second push plate which are arranged at intervals in the front and back.
Like this, rivers loop through the clearing hole in first push pedal and the second push pedal, and the setting up of the double-deck clearing hole that parallels like this has greatly improved the fragmentation degree to passing through rivers, has improved the turbulent degree of rivers under the little condition of the whole fluctuation range of the body of keeping for the roe can follow rivers better and do the higher nevertheless less drift of range of frequency, more is favorable to the roe hatching and does not damage the roe.
Furthermore, a dislocation adjusting mechanism is arranged between the first push plate and the second push plate, and a turbulence adjusting device is formed.
Thus, the dislocation distance of the through hole between the first push plate and the second push plate can be adjusted through the dislocation adjusting mechanism, and the degree of turbulence for forming turbulence can be adjusted. So that the turbulence degree more suitable for the hatching of the fish eggs is formed.
Furthermore, dislocation adjustment mechanism, including the vertical fixation on first push pedal and the adjusting screw who points to the second push pedal, adjusting screw passes the spout of vertical setting on the second push pedal and relies on a pair of fixation nut who connects soon to fix the centre gripping of second push pedal on adjusting screw.
Therefore, the adjusting screw rod can slide up and down along the sliding groove by loosening the fixing nut and then be fastened again, and the dislocation adjustment is realized by adjusting the height of the fixed position of the second push plate up and down; meanwhile, the structure can also realize the adjustment of the front-back distance between the two push plates, and the accurate adjustment of the turbulence degree of the formed turbulence can be better realized by simultaneously adjusting the dislocation degree and the mutual distance. And has the characteristics of simple structure, convenient and quick adjustment, stability and reliability.
Furthermore, a circle of backward flexible ribbons is arranged backwards at the rear side of each through hole on the push plate.
Like this, when the push pedal promoted rivers forward, the round flexible streamer that is formed by a plurality of roots of every clearing hole rear side was fluctuated in the same direction as the random swing of rivers, and the rivers that further drive to pass through from the clearing hole are followed flexible streamer and are together random swing all around to backward and flexible streamer clearance spread all around, have further improved like this from the random fluctuation effect of the rivers that the clearing hole flowed through and have reduced undulant range again simultaneously, more be favorable to the roe hatching and do not damage the roe.
Furthermore, the rear side surfaces of the first push plate and the second push plate are respectively provided with a flexible ribbon, and the length of the flexible ribbon at the rear side of the first push plate is matched with the distance between the first push plate and the second push plate (basically consistent).
Like this, the flexible ribbon that is located between first push pedal and the second push pedal not only can make the turbulent flow better, and the flexible ribbon can be under the effect of rivers can lead to the position of clearing hole place on the second push pedal in the wobbling, and then the roe that leads to entering clearing hole on the first push pedal flows from the clearing hole on the second push pedal better, avoids striking the second push pedal and causes the damage.
The particle image detection system comprises a camera which is arranged right opposite to the hatching tank, a laser which is arranged right opposite to a camera shooting area on the hatching tank and a plurality of tracer particles which are put into a water body in the hatching tank, wherein the laser is connected with the camera and a control center.
Therefore, the laser irradiates the water body in the shooting area, so that the tracer particles in the water body reflect light and can be shot by the camera to obtain a dynamic image, and then the flow field information can be obtained by shooting the image change condition of the tracer particles and carrying out image processing by a control center (computer). The turbulence degree condition of the water body can be directly reflected by the fluctuation condition of the tracer particles in the video. The three-dimensional velocity field of the tracer particles can be further obtained by analyzing the flow field parameters, the turbulence intensity of the water flow of the tracer particles is further calculated and obtained, and the data of the turbulence energy value of the detection point is obtained.
Further, the tracer particle size and mass match the roe size and mass data (fall within the roe data range). Therefore, the fluctuation situation of the roes in the water body is intuitively reflected through the fluctuation image situation of the tracer particles.
Further, the video camera is a CCD camera. The shooting and data conversion are facilitated.
Further, the laser has a laser sheet light source facing the width direction of the hatching tank. And the information of the tracer particles in the image can be more conveniently extracted.
In conclusion, the fish egg hatching device has the advantages that the water environment can be better adjusted, and the fish egg hatching effect is improved.
Drawings
Fig. 1 is a schematic structural view of a fish egg hatching apparatus according to the present invention from the top.
Fig. 2 isbase:Sub>A sectional viewbase:Sub>A-base:Sub>A of fig. 1.
Fig. 3 is a sectional view B-B of fig. 1.
FIG. 4 is a side view of the push plate.
Figure 5 is a schematic view of multiple sets of push plates of different through hole shapes.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments.
The specific implementation mode is as follows: a drifting fish egg hatching method is characterized in that the artificial water body environment is an annular water channel, and thrust horizontally applied on the cross section of the water channel along the direction of the water channel pushes water flow to circularly flow and realize fish egg hatching.
Like this, through whole thrust of exerting on the annular water course cross section and make its circulation flow, can simulate actual river course rivers better be the whole characteristics that flow forward of rivers in the cross section direction, the flow condition of rivers is more stable, and is even, does not have the dead angle, accords with more with the actual rivers condition in river course, has improved the hatching effect to the roe.
In the hatching process of the method, the temperature of the water flow is regulated and controlled to ensure that the water flow is incubated at a proper temperature. So as to better improve the hatching effect. The suitable temperature can be obtained by measuring the actual hatching environment of the fish eggs or by experiment.
In the hatching process of the method, the oxygen content of the water flow is aerated and adjusted, so that the water flow is hatched under the appropriate oxygen capacity. So as to better improve the hatching effect. The appropriate oxygen capacity may be obtained by measuring the actual incubation environment of the roe or by experiment.
In the hatching process of the method, the turbulence degree of the water flow is adjusted, so that the water flow has enough turbulence and is hatched. So as to better improve the hatching effect. The turbulence amount of the water body can be obtained by measuring the actual hatching environment condition of the fish eggs or by experiments, and parameters such as turbulence intensity, reynolds number or turbulence energy can be used as judgment index parameters.
In this embodiment, the method is implemented by using the fish egg hatching device shown in fig. 1-5, the fish egg hatching device comprises a hatching tank 1 which is horizontal and annular as a whole, a push plate 2 is arranged in the hatching tank 1 along the cross section direction, and the push plate 2 is connected with a circulating motion control mechanism and can be driven to do circulating motion along the annular shape of the hatching tank.
Like this, the push pedal is driven and is done annular cyclic motion along hatching the groove, wholly promotes rivers from the cross section direction and does cyclic motion in annular hatching the groove, can simulate the actual river course well and be the whole characteristics that flow forward on the cross section direction, and with the river course actual water flow condition accord with more, rivers are more stable even, have improved the hatching effect of roe.
The hatching tank 1 comprises two opposite semicircular sections and two straight-line sections connected between the two semicircular sections, the circulating motion control mechanism comprises two transmission discs 3 which are horizontally arranged at the upper ends of the inner circles of the two semicircular sections in a matching manner, a transmission belt 4 is sleeved on each transmission disc 3, the upper end of the push plate 2 is connected to the transmission belt through a transversely arranged connecting rod in an installing manner, and at least one transmission disc 3 is connected with a motor 6.
Therefore, the motor drives the transmission disc to rotate, and drives the push plate to circularly move along the hatching tank through the transmission belt to push water flow to circularly flow. Meanwhile, the motor device is positioned above the hatching tank, so that the adverse effect of motor vibration on fish egg hatching is avoided.
Wherein, the driving disc 3 is a chain wheel, and the driving belt 4 is a chain. Thus, the control is more reliable and accurate.
Wherein, the motor 6 is fixed on a mounting rack 7 of a portal frame structure. This allows a better fixation of the motor.
Wherein, a protective sleeve is arranged outside the motor 6. This may be better waterproof.
Wherein, the middle part below of driving plate 3 is provided with decurrent bracing piece 8, and the driving plate is rotationally installed on the bracing piece. Therefore, the support can be better realized, and the stability is ensured.
Wherein, a water inlet 9 and a water outlet 10 are arranged on the hatching tank 1. Thus, water can be fed and discharged more conveniently. During implementation, the dense nets are arranged at the water inlet and the water outlet, so that the loss of fish eggs can be prevented. Meanwhile, the water inlet is connected with the water pump 11 through a water inlet pipeline, so that water pumping and water feeding are facilitated.
Wherein the hatching tank 1 is integrally fixed on a mounting table 12. Thus, the operation and observation are more convenient.
Wherein, the hatching tank 1 is made of transparent organic glass material. Therefore, the observation is more convenient, and the hardness and the quality of the material can be ensured.
Wherein, a camera 13 is arranged outside the hatching tank 1 and opposite to the hatching tank. This facilitates the observation and recording of hatching processes and data by means of a camera.
The fish egg hatching device also comprises a control and regulation system, and the control and regulation system comprises a temperature control device 14 and an aeration device 15 which are arranged on the hatching tank; the device also comprises a temperature sensor and a dissolved oxygen detection sensor (not shown in the figure) which are arranged in the incubation tank, and the temperature control device 14, the aeration device 15, the temperature sensor and the dissolved oxygen detection sensor are respectively connected with a control center (not shown in the figure).
The control and regulation system can detect the water flow temperature and regulate the water temperature through the temperature control device, can detect the dissolved oxygen in water and control the dissolved oxygen concentration in water through the aeration device, so that the water flow temperature and the dissolved oxygen concentration are both in a range suitable for hatching, and the hatching effect is better improved. The temperature control device and the aeration device are existing mature products, and the structures of the temperature control device and the aeration device are not detailed here.
Wherein, the outer part of one side of the incubation groove 1 is also fixedly provided with an adjusting groove 16, a communication gap is arranged between the adjusting groove 16 and the incubation groove to ensure that the inner parts of the adjusting groove 16 and the incubation groove are communicated, and the temperature control device 14 and the aeration device 15 are positioned in the adjusting groove 16.
Therefore, the influences of the temperature control device and the aeration device on the water body flowing and the fish egg hatching can be better reduced.
Wherein, the adjusting groove 16 is positioned at the turning position outside the hatching groove 1.
Therefore, the water body exchange inside the two is more facilitated.
The control and regulation system also comprises a water flow speed detection device (not shown in the figure), the water flow speed detection device is connected with a control center, and the control center is connected with the motor. In this way, the water flow rate can be better detected and guaranteed to be at a desired rate. In the implementation, the water velocity detection device may be directly installed in the incubation tank for measurement, or an individual water velocity measurement instrument may be used, when the water velocity needs to be detected, a plurality of measurement points may be taken in the incubation tank, for example, a measurement point (ABCD four points in the figure) is taken in each of two arc sections and the middle of two straight sections, and then the water velocity measurement instrument is directly held by hand to each measurement point to detect the flow velocity, and the water velocity is obtained by calculating the average flow velocity. Thus, the interference of the water flow speed detection device to the water flow can be avoided.
Wherein, the surface of the front side of the push plate 2 is provided with a layer of elastic material layer 21.
Thus, damage to the roe by impact can be better avoided.
Wherein the push plate is provided with a plurality of through holes 22.
Therefore, partial water flow can flow through the through holes, the water body disturbance degree of adjacent area positions of the front side and the rear side of the push plate is reduced, the water body environments of the front side and the rear side of the push plate and the rest area positions of the incubation groove are more consistent, and the incubation is more facilitated to be carried out stably. Meanwhile, the water flow can form turbulent flow after passing through the through holes, so that the simulation of the actual water environment of a river channel is facilitated, and the improvement of the hatchability of fish eggs is facilitated.
Wherein, the push plate 2 is detachably connected with the circulating motion control mechanism. Like this, can set up the push pedal of the different through-hole shapes of multiunit (see fig. 5), the convenient push pedal that has different shapes clearing hole of changing as required to adjust the water current degree of disorder, make it more be favorable to improving the hatchability of roe. During concrete implementation, the connecting screw rods with symmetrical threads are horizontally arranged on one side of the upper end of the push plate and one side of a transmission belt of the circulating motion control mechanism respectively, and then the detachable connection is realized by means of a matched connecting nut.
Wherein, the push plates 2 are arranged in groups, and each group of push plates comprises a first push plate 23 and a second push plate 24 which are arranged at intervals in front and back.
Like this, rivers loop through the clearing hole in first push pedal and the second push pedal, and the setting up of the double-deck clearing hole that parallels like this has greatly improved the fragmentation degree to passing through rivers, has improved the turbulent degree of rivers under the little condition of the whole fluctuation range of the body of keeping for the roe can follow rivers better and do the higher nevertheless less drift of range of frequency, more is favorable to the roe hatching and does not damage the roe.
Wherein, a dislocation adjusting mechanism is arranged between the first push plate 23 and the second push plate 24, and forms a turbulent flow adjusting device.
Thus, the dislocation distance of the passing hole between the first push plate and the second push plate can be adjusted through the dislocation adjusting mechanism, and the degree of turbulence of the formed turbulent flow can be adjusted. So that the fish eggs form a turbulent fluctuation degree which is more suitable for the hatching of the fish eggs.
The dislocation adjusting mechanism comprises an adjusting screw rod 25 which is vertically fixed on the first push plate and points to the second push plate, and the adjusting screw rod passes through a sliding groove vertically formed in the second push plate and clamps and fixes the second push plate on the adjusting screw rod by means of a pair of screwed fixing nuts 26.
Therefore, the adjusting screw rod can slide up and down along the sliding groove by loosening the fixing nut and then be fastened again, and the dislocation adjustment is realized by adjusting the height of the fixing position of the second push plate up and down; meanwhile, the structure can also realize the adjustment of the front-back distance between the two push plates, and can better realize the accurate adjustment of the turbulence degree of the formed turbulent flow by simultaneously adjusting the dislocation degree and the mutual distance. And has the characteristics of simple structure, convenient and fast adjustment, stability and reliability.
Wherein, a circle of backward flexible ribbons 27 are arranged at the rear side of each passing hole on the push plate 2.
Like this, when the push pedal promoted rivers forward, the flexible ribbon of round that is formed by a plurality of roots of every clearing hole rear side was undulant along the random swing of rivers, and the further rivers that drive to pass through from the clearing hole are followed flexible ribbon and are random swing all around to backward and flexible ribbon clearance spread all around, have further improved like this from the random fluctuation effect of the rivers that the clearing hole flowed through and have reduced undulant range simultaneously again, more are favorable to the roe hatching and do not harm the roe.
Wherein, the back side surfaces of the first push plate 23 and the second push plate 24 are both provided with flexible ribbons 27, and the length of the flexible ribbons on the back side of the first push plate is matched with (basically consistent with) the distance between the first push plate and the second push plate.
Like this, the flexible ribbon that is located between first push pedal and the second push pedal not only can make the turbulent flow better, and the flexible ribbon can be under the effect of rivers can lead to the position of clearing hole place on the second push pedal in the wobbling, and then the roe that leads to entering clearing hole on the first push pedal flows from the clearing hole on the second push pedal better, avoids striking the second push pedal and causes the damage.
The device also comprises a particle image detection system, wherein the particle image detection system comprises a camera 13 which is arranged right opposite to the hatching tank, a laser 29 which is arranged right opposite to a camera shooting area on the hatching tank, and a plurality of tracer particles 30 which are put into a water body in the hatching tank, and the laser and the camera are connected with a control center. In the figure, reference numeral 31 denotes a fish egg.
Therefore, the laser irradiates the water body in the shooting area, so that the tracer particles in the water body reflect light and can be shot by the camera to obtain a dynamic image, and then the flow field information can be obtained by shooting the image change condition of the tracer particles and carrying out image processing by a control center (computer). The turbulence degree condition of the water body can be directly reflected by the fluctuation condition of the tracer particles in the video. The three-dimensional velocity field of the tracer particles can be further obtained by analyzing the flow field parameters, the turbulence intensity of the water flow of the tracer particles is further calculated and obtained, and the data of the turbulence energy value of the detection point is obtained.
Taking the point E just opposite to the camera in the image area in the image as an example, changing the point to be a turbulence degree measuring point, setting the height from the bottom of the water tank to be 0.5h (h is the water depth), obtaining a tracer particle image by applying a particle image detection system, calculating a two-dimensional flow field by using post-processing software PIVlab in a computer of a control center, and obtaining the time-average flow velocity in the x direction of the point E
x Instantaneous flow velocity u x Pulsating flow velocity u x ' (similarly in the y-direction), and finally, the turbulence intensity σ at the point E in the x-and y-directions can be calculated x 、σ y And obtaining the turbulent energy k value at the E point. The above physical quantity relationship is:
u x =
x +u x ’
u y =
y +u y ’
in the above formula:
x 、u x 、u x ' is the time-averaged flow rate, instantaneous flow rate, pulsatile flow rate in the x-direction `>
y 、u y 、u y 'time-average, instantaneous, pulsating flow in the y-direction,' σ x 、σ y The turbulence intensity in the x direction and the y direction is shown, n is the number of instantaneous flow fields, and the turbulence energy k value can comprehensively measure the turbulence degree of water flow in the water tank.
In this embodiment the size and mass of the tracer particles 30 and the size and mass data of the roe 31 match (fall within the data range of the roe). The outer surface of the tracer particle 30 is provided with a layer of color or light reflecting material to facilitate tracking. Therefore, the fluctuation situation of the roes in the water body is intuitively reflected through the fluctuation image situation of the tracer particles.
The camera 13 is a CCD camera. The shooting and data conversion are facilitated.
Wherein, the laser 29 has a laser sheet light source facing the width direction of the hatching tank. And the information of the tracer particles in the image can be more conveniently extracted.
Claims (8)
1. A drifting fish egg hatching method is characterized in that the artificial water body environment is an annular water channel, and thrust horizontally applied on the cross section of the water channel along the direction of the water channel pushes water flow to circularly flow and realize fish egg hatching;
in the hatching process, the turbulence degree of the water flow is adjusted to ensure that the water flow has enough turbulence quantity and hatching is carried out;
the fish egg hatching device comprises a hatching groove which is horizontal and annular as a whole, a push plate is arranged in the hatching groove along the direction of the cross section, the push plate is connected with a circulating motion control mechanism and can be driven to do circulating motion along the annular shape of the hatching groove, so that the push plate integrally pushes water flow to do circulating motion in the annular hatching groove from the direction of the cross section; the push plate is provided with a plurality of through holes;
the push plates are arranged in groups, and each group of push plates comprises a first push plate and a second push plate which are arranged at intervals in the front and back;
a dislocation adjusting mechanism is arranged between the first push plate and the second push plate, and a turbulent flow adjusting device is formed;
the dislocation adjusting mechanism comprises an adjusting screw rod which is vertically fixed on the first push plate and points to the second push plate, and the adjusting screw rod passes through a chute which is vertically arranged on the second push plate and clamps and fixes the second push plate on the adjusting screw rod by means of a pair of screwed fixing nuts; during adjustment, the adjusting screw rod slides up and down along the sliding groove by loosening the fixing nut and then is fastened again, and dislocation adjustment is realized by adjusting the height of the fixing position of the second push plate up and down; meanwhile, the front-back distance between the two push plates is adjusted, and the accurate adjustment of the turbulence degree of the formed turbulence is realized by adjusting the dislocation degree and the mutual distance simultaneously.
2. The method for hatching the drifting fish eggs according to claim 1, wherein during hatching, the temperature of water flow is regulated and controlled to be at an appropriate temperature for hatching; in the hatching process, the oxygen content of the water flow is aerated and adjusted, so that the water flow is hatched under the appropriate oxygen capacity.
3. The method for hatching the drifting fish eggs as claimed in claim 1, wherein the hatching tank comprises two opposite semicircular segments and two straight line segments connected between the two semicircular segments, the circulating motion control mechanism comprises two driving discs which are installed at the upper ends of the inner circles of the two semicircular segments in a matching and horizontal mode, a driving belt is sleeved on the driving discs, the upper end of the push plate is installed and connected on the driving belt through a connecting rod arranged transversely, and at least one driving disc is connected with a motor;
the transmission disc is a chain wheel, and the transmission belt is a chain;
a protective sleeve is arranged outside the motor;
the middle lower part of the transmission disc is provided with a downward supporting rod, and the transmission disc is rotatably arranged on the supporting rod.
4. The method for hatching the drifting fish eggs as claimed in claim 3, wherein a water inlet and a water outlet are arranged on the hatching tank;
the hatching tank is integrally fixed on a mounting platform;
the hatching tank is integrally made of transparent organic glass material;
a camera is arranged outside the hatching tank and opposite to the hatching tank.
5. The incubation method of claim 1, further comprising a control and regulation system, wherein the control and regulation system comprises a temperature control device and an aeration device installed on the incubation tank, the control and regulation system further comprises a temperature sensor and a dissolved oxygen detection sensor installed in the incubation tank, and the temperature control device and the aeration device, and the temperature sensor and the dissolved oxygen detection sensor are respectively connected to the control center;
the outer part of one side of the incubation groove is fixedly provided with an adjusting groove, a communication gap is arranged between the adjusting groove and the incubation groove to ensure that the inner parts of the adjusting groove and the incubation groove are communicated, and the temperature control device and the aeration device are positioned in the adjusting groove;
the adjusting groove is positioned at the turning position outside the hatching groove;
the control and regulation system further comprises a water flow speed detection device, the water flow speed detection device is connected with a control center, and the control center is connected with the motor.
6. The method for hatching a drifting fish egg as claimed in claim 1, wherein: the front side surface of the push plate is provided with an elastic material layer;
the push plate is detachably connected with the circulating motion control mechanism.
7. The method for hatching drifting fish eggs as claimed in claim 6, wherein a circle of backward flexible ribbons are arranged on the push plate backward from the rear side of each passing hole;
the rear side of first push pedal and second push pedal all is provided with flexible ribbon, and the flexible ribbon length of first push pedal rear side matches with the interval between first push pedal and the second push pedal.
8. The incubation method of claim 1, further comprising a particle image detection system, wherein the particle image detection system comprises a camera facing the incubation tank, a laser facing the camera area of the camera on the incubation tank, and a plurality of trace particles thrown into the water in the incubation tank, wherein the laser and the camera are connected to a control center;
the size and the quality of the tracer particles are matched with the size and the quality data of the fish eggs;
the video camera is a CCD camera;
the laser has a laser sheet light source facing the width direction of the hatching tank.
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| CN202111428480.8A CN113951185B (en) | 2021-11-29 | 2021-11-29 | Drifting fish egg hatching method |
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| CN116138192A (en) | 2023-05-23 |
| CN113951185A (en) | 2022-01-21 |
| CN116138192B (en) | 2024-04-19 |
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