CN106234275B - Screening device and screening method for high-activity prawn nauplii - Google Patents
Screening device and screening method for high-activity prawn nauplii Download PDFInfo
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- CN106234275B CN106234275B CN201610731644.7A CN201610731644A CN106234275B CN 106234275 B CN106234275 B CN 106234275B CN 201610731644 A CN201610731644 A CN 201610731644A CN 106234275 B CN106234275 B CN 106234275B
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Abstract
The application relates to the technical field of prawn culture, in particular to a screening device and a screening method for high-activity prawn nauplii, wherein the screening device comprises a box body, one side wall of the box body is provided with a light-transmitting surface, the other side walls of the box body are non-light-transmitting surfaces, and the light-transmitting surface is provided with a light source; the box has set gradually a plurality of printing opacity baffle towards the direction of printing opacity face, and a plurality of subregion is separated into with the box to the printing opacity baffle, leaves the passageway that supplies the shrimp nauplius to pass through between printing opacity baffle top and the box top, and the top of every printing opacity baffle is provided with the baffle that is used for blockking the shrimp nauplius to pass through. Compared with the prior art, the method can quickly and effectively screen the prawn nauplii mixed with unhatched fertilized eggs and irregular activity to obtain the prawn nauplii with higher activity, thereby ensuring the quality of the prawn nauplii, being beneficial to improving the quality and survival rate of the prawn larvae and promoting the industrialized development of the prawn breeding industry.
Description
Technical Field
The application relates to the technical field of prawn culture, in particular to a high-activity prawn nauplii screening device and method.
Background
The propagation of prawn mainly includes several important stages of fertilized egg, nauplii, shrimp seedling and adult prawn. The quality of the young prawn is determined by the quality of the adult prawn, and the quality of the young prawn variety is determined by the quality of the young prawn, so that the breeding of the young prawn with excellent performance is one of the key techniques for culturing the prawn. The excellent prawn nauplii can show better activity, mainly manifested by stronger floating ability and phototaxis performance of the nauplii, while the inferior prawn nauplii has poorer activity.
At present, in the prawn breeding industry, the larva breeding of most prawns mainly depends on wild parents, namely fertilized eggs generated by male and female parent prawns are hatched in a larva breeding pond to form nauplii, and then the nauplii are bred in a larva breeding pond. In the existing prawn breeding mode, the nauplii hatched in the larva breeding pool have uneven breed activity, the quality of the prawn seedlings bred after the nauplii directly enter the larva breeding pool cannot be guaranteed, the prawn seedlings bred by the nauplii with poor activity are easily damaged by pathogens, the survival rate is low, the quality and the yield of the prawn seedlings are seriously influenced, and the healthy development of modern high-efficiency and large-scale prawn breeding industry cannot be met.
Disclosure of Invention
The technical problem is solved, and the high-activity prawn nauplii screening device and the screening method are simple and quick to operate.
In order to achieve the purpose, the application provides the following technical scheme:
the screening device for the high-activity prawn nauplii comprises a box body, wherein one side wall of the box body is a light-transmitting surface, the other side walls of the box body are light-opaque surfaces, and the light-transmitting surface is provided with a light source;
the box court the direction of printing opacity face has set gradually a plurality of printing opacity baffle, the printing opacity baffle will a plurality of subregion are separated into to the box, printing opacity baffle top with leave the passageway that supplies the shrimp nauplius to pass through between the box top, every the top of printing opacity baffle is provided with the baffle that is used for blockking the shrimp nauplius to pass through.
The light-transmitting partitions are sequentially arranged in a descending height manner in the direction of the light-transmitting surface.
And the height difference of the adjacent light-transmitting partition plates is set to be 10-30 cm.
Wherein, the light-transmitting partition plate is provided with two.
The height difference between the box body and the light-transmitting partition plate is set to be 10-40 m.
The box body is a rectangular glass box body, and the light-tight surface is provided with a light-tight coating.
Wherein, the baffle with the printing opacity baffle is detachable to be connected.
Wherein, the box body is provided with a water inlet and a water outlet.
The invention also provides a screening method of the high-activity prawn nauplii, which comprises the following steps:
step one, collecting prawn nauplii:
hatching fertilized eggs of the prawns in a larva culture pond to form prawn nauplii, and collecting the prawn nauplii in the larva culture pond;
step two, screening the high-activity prawn nauplii:
by adopting the screening device, the water surface in the box body submerges the light-transmitting partition plate and does not exceed the height of the baffle plate, then the prawn nauplii collected in the step 1 are placed into the first separation area, the prawn nauplii can move from the first separation area to the last separation area in sequence under the driving of the light source, the prawn nauplii stay in each separation area for a period of time through the baffle plate, so that fertilized eggs which are not hatched into larvae and prawn nauplii with poor activity sink to the bottom of the corresponding separation area, and the prawn nauplii with strong activity float upwards and can enter the last separation area, and then the prawn nauplii floating upwards in the last separation area are collected, namely the prawn nauplii with high activity is obtained.
In the first step, collecting the prawn nauplii by using a filter screen of 150-200 meshes;
and in the second step, a filter screen of 150-200 meshes is adopted to collect the floating prawn nauplii in the last separation area, and the high-activity prawn nauplii are obtained.
The beneficial effect of this application:
according to the high-activity prawn nauplii screening device and the screening method, the prawn nauplii with higher activity are screened step by arranging the plurality of separation areas. During screening, the water surface in the box body submerges the light-transmitting partition plate and does not exceed the height of the baffle plate, then the prawn nauplii collected in the larva breeding pool are placed in the first separation area, because the light-transmitting surface is provided with the light source, the prawn nauplii with good activity can float upwards and move in the direction of the light source, because of the existence of the baffle plate, the prawn nauplii stay in the first separation area to precipitate for a period of time, then the baffle plate is removed, at the moment, the prawn nauplii with strong activity float upwards and swim out of the first separation area to enter the second separation area, and unhatched oosperms and prawn nauplii with poor activity precipitate to the bottom of the box, so that the first-stage screening is completed; similarly, after each stage of screening, the prawn nauplii with better activity can float upwards and enter the next separation area along with water flow, and after the screening of a plurality of separation areas step by step, the prawn nauplii which can finally swim to the last separation area are the high-activity prawn nauplii. Compared with the prior art, the screening device and the screening method have the advantages that the characteristics that the high-activity prawn nauplii have strong floating capacity and phototaxis performance are utilized, so that the prawn nauplii mixed with unhatched fertilized eggs and with uneven activity can be quickly and effectively screened to obtain the high-activity prawn nauplii, the quality of the prawn nauplii is guaranteed, the quality and the survival rate of the prawn saplings are improved, and the industrial development of the prawn breeding industry is promoted; the screening device further has the advantages of being simple in structure, low in production cost and suitable for large-scale production.
Drawings
Fig. 1 is a schematic structural diagram of a high-activity prawn nauplii screening device according to the present application.
Fig. 2 is a schematic structural diagram of another angle of the high-activity prawn nauplii screening device of the present application.
Reference numerals:
the box body 1 and the light-transmitting surface 11;
a light-transmitting partition plate 2, a partition region 21;
a water outlet 4;
a drain pipe 5;
a light source 6.
Detailed Description
The present application will be described in detail below with reference to specific embodiments and the accompanying drawings.
Example 1:
the screening device for the high-activity prawn nauplii comprises a box body 1, wherein one side wall of the box body 1 is a light-transmitting surface 11, the other side walls of the box body are light-impermeable surfaces 11, and the light-transmitting surface 11 is provided with a light source 6, as shown in fig. 1 and 2. The box 1 has set gradually two printing opacity baffles 2 towards the direction of printing opacity face 11, and three subregion 21 is separated into with box 1 to two printing opacity baffles 2, leaves the passageway that supplies the shrimp nauplius to pass through between 2 tops of printing opacity baffles and the 1 top of box, and the top of every printing opacity baffle 2 is provided with the baffle 3 that is used for blockking the shrimp nauplius to pass through.
When the device is used, water is added into the box body 1, the water surface in the box body 1 submerges the light-transmitting partition plate 2 and does not exceed the height of the baffle plate 3, then the nauplii of the prawns collected in the nauplii culture pond are placed into the first separation area 21, the light source 6 is arranged on the light-transmitting surface 11, the nauplii of the prawns with good activity can float upwards and move in the direction of the light source 6, the nauplii of the prawns with good activity can stay in the first separation area 21 and precipitate for a period of time due to the existence of the baffle plate 3, then the baffle plate 3 is removed, at the moment, the nauplii of the prawns with strong activity float upwards and swim out of the first separation area 21 and enter the second separation area 21, and the fertilized eggs which are not hatched and the nauplii of the prawns with poor activity precipitate to the bottom of the box, so that the first-stage screening is completed; similarly, after each stage of screening, the prawn nauplii with better activity can float upwards and enter the next partition area 21 along with water flow, so that after the screening of the plurality of partition areas 21 step by step, the prawn nauplii which can finally swim to the last partition area 21 is the high-activity prawn nauplii.
In this embodiment, the two light-transmitting partitions 2 are sequentially arranged in a descending height manner in the direction of the light-transmitting surface 11, the height difference between the adjacent light-transmitting partitions 2 is set to be 10cm to 30cm, and the preferred height difference is set to be 20 cm. Because the prawn nauplii with better activity continuously float and swim through the plurality of separating areas 21, when the prawn nauplii reach the last separating area 21, the buoyancy force on the prawn nauplii can be gradually weakened, therefore, the height of the light-transmitting partition plate 2 is gradually reduced, so that more prawn nauplii with better activity can be ensured to swim through the light-transmitting partition plate 2 and enter the last separating area 21 without loss, and the yield is improved.
In the embodiment, the height difference between the box body 1 and the light-transmitting partition plate 2 is set to be 10 m-40 m, so that a channel for the prawn nauplii to pass through is reserved between the top of the light-transmitting partition plate 2 and the top of the box body 1.
The box body 1 is a rectangular glass box body 1, and the light-tight surface 11 is provided with a light-tight coating (such as a black coating) to ensure that only one side wall is light-transmitting. The glass box body 1 has the advantages of easy processing and low cost.
In this embodiment, the baffle 3 is detachably connected to the light-transmitting partition 2, when the nauplii of the prawns just enter the partition 21, since the baffle 3 is higher than the water surface, the nauplii of the prawns can be prevented from entering the next partition 21, and the nauplii of the prawns can be allowed to settle for a period of time, so that the unhatched fertilized eggs and the nauplii of the prawns with poor activity settle to the bottom of the case, and then the baffle 3 is detached from the light-transmitting partition 2, so that the nauplii with better activity can swim to enter the next partition 21 along with the water flow under the driving of the light source 6.
In this embodiment, the box body 1 is provided with a water inlet and a water outlet 4. Specifically, a water outlet 4 is arranged on the bottom surface of each partition area 21, a water discharge pipe 5 is arranged in each partition area 21, one end of each water discharge pipe 5 is inserted into the water outlet 4 and connected in a sealing mode, and the other end of each water discharge pipe 5 extends out of the water surface. Because the box 1 is darker, when draining, can conveniently hold drain pipe 5, extract drain pipe 5 from delivery port 4 and can open delivery port 4 and carry out the drainage to need not to set up the sealing plug at delivery port 4, consequently, have simple structure, drainage convenient and fast's advantage, further improved work efficiency.
Compared with the prior art, the screening device disclosed by the application utilizes the characteristics that the high-activity prawn nauplii have stronger floating capacity and phototaxis performance, so that the high-activity prawn nauplii can be obtained by rapidly and effectively screening the prawn nauplii mixed with unhatched fertilized eggs and uneven activity, the quality of the prawn nauplii is ensured, the quality and the survival rate of the prawn nauplii are favorably improved, and the industrial development of the prawn breeding industry is promoted; the screening device further has the advantages of being simple in structure, low in production cost and suitable for large-scale production.
Example 2:
the screening method of the high-activity prawn nauplii comprises the following steps:
step one, collecting prawn nauplii:
hatching fertilized eggs of the prawns in a larva culture pond to form prawn nauplii, and collecting the prawn nauplii in the larva culture pond;
step two, screening the high-activity prawn nauplii:
the screening device of the embodiment 1 (see fig. 1 and 2) is adopted, the water surface in the box body 1 is submerged in the light-transmitting partition plate 2 and does not exceed the height of the baffle plate 3, then the prawn nauplii collected in the step 1 are placed in the first separation area 21, the prawn nauplii can move from the first separation area 21 to the last separation area 21 in sequence under the driving of the light source 6, the prawn nauplii stay in each separation area 21 for a period of time through the baffle plate 3, fertilized eggs which are not hatched into larvae and prawn nauplii with poor activity sink to the bottom of the corresponding separation area 21, and the prawn nauplii with stronger activity float upwards and can enter the last separation area 21, and then the prawn nauplii floating upwards in the last separation area 21 are collected, namely the prawn nauplii with high activity is obtained.
In the first step, after filtering and dewatering by adopting a filter screen with 150-200 meshes, collecting and obtaining the prawn nauplii;
in the second step, a filter screen of 150-200 meshes is adopted to collect the prawn nauplii floating upwards in the last separation area 21, and after filtering and dewatering, the high-activity prawn nauplii are obtained.
During screening, the water surface in the box body 1 is submerged in the light-transmitting partition plate 2 and does not exceed the height of the baffle plate 3, then the prawn nauplii collected in the larva breeding pool are placed in the first separation area 21, the light source 6 is arranged on the light-transmitting surface 11, the prawn nauplii with good activity can float upwards and move towards the direction of the light source 6, the prawn nauplii with good activity can stay in the first separation area 21 to precipitate for a period of time due to the existence of the baffle plate 3, then the baffle plate 3 is removed, the prawn nauplii with strong activity floats upwards and swims out of the first separation area 21 to enter the second separation area 21, and the unhatched fertilized eggs and the prawn nauplii with poor activity precipitate to the bottom of the box, so that the first-stage screening is completed; similarly, after each stage of screening, the prawn nauplii with better activity can float upwards and enter the next partition area 21 along with water flow, so that after the screening of the plurality of partition areas 21 step by step, the prawn nauplii which can finally swim to the last partition area 21 is the high-activity prawn nauplii. Compared with the prior art, the screening method disclosed by the application utilizes the characteristics that the high-activity prawn nauplii have stronger floating capacity and phototaxis performance, so that the prawn nauplii mixed with unhatched fertilized eggs and with uneven activity can be rapidly and effectively screened to obtain the high-activity prawn nauplii, the quality of the prawn nauplii is ensured, the quality and the survival rate of the prawn larvae are favorably improved, and the industrial development of the prawn breeding industry is promoted.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the protection scope of the present application, and although the present application is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present application without departing from the spirit and scope of the technical solutions of the present application.
Claims (9)
1. The utility model provides a sieving mechanism of high activity shrimp nauplius, its characterized in that: the light source box comprises a box body, wherein one side wall of the box body is a light transmitting surface, the other side walls of the box body are light non-transmitting surfaces, and the light transmitting surface is provided with a light source;
the box body is sequentially provided with a plurality of light-transmitting partition plates towards the light-transmitting surface, the light-transmitting partition plates divide the box body into a plurality of partition areas, a channel for prawn nauplii to pass through is reserved between the top of each light-transmitting partition plate and the top of the box body, and the top of each light-transmitting partition plate is provided with a baffle for blocking the prawn nauplii to pass through;
the baffle is detachably connected with the light-transmitting partition plate.
2. The screening device of high-activity prawn nauplii according to claim 1, characterized in that: the light-transmitting partition plates are sequentially arranged in a descending manner in height in the direction of the light-transmitting surface.
3. The screening device of high-activity prawn nauplii according to claim 1, characterized in that: the height difference between the adjacent light-transmitting partition plates is set to be 10 cm-30 cm.
4. The screening device of high-activity prawn nauplii according to claim 2, characterized in that: the number of the light-transmitting partition plates is two.
5. The screening device of high-activity prawn nauplii according to claim 1, characterized in that: the height difference between the box body and the light-transmitting partition plate is set to be 10-40 m.
6. The screening device of high-activity prawn nauplii according to claim 1, characterized in that: the box body is a rectangular glass box body, and the light-tight surface is provided with a light-tight coating.
7. The screening device of high-activity prawn nauplii according to claim 1, characterized in that: the box body is provided with a water inlet and a water outlet.
8. A method for screening high-activity prawn nauplii is characterized by comprising the following steps: the method comprises the following steps:
step one, collecting prawn nauplii:
hatching fertilized eggs of the prawns in a larva culture pond to form prawn nauplii, and collecting the prawn nauplii in the larva culture pond;
step two, screening the high-activity prawn nauplii:
the screening device of any one of claims 1 to 7 is adopted, the water surface in the box body submerges the light-transmitting partition plate and does not exceed the height of the baffle plate, then the prawn nauplii collected in the step 1 are placed in the first separation area, the prawn nauplii can move from the first separation area to the last separation area in sequence under the driving of the light source, the prawn nauplii stay in each separation area for a period of time through the baffle plate, so that fertilized eggs which are not hatched into the nauplii and prawn nauplii with poor activity sink to the bottom of the corresponding separation area, and the prawn nauplii with strong activity float upwards and can enter the last separation area, and then the prawn nauplii floating upwards in the last separation area are collected, and the prawn nauplii with high activity are obtained.
9. The method for screening the high-activity prawn nauplii as claimed in claim 8, which is characterized in that: in the first step, collecting the prawn nauplii by using a filter screen of 150-200 meshes;
and in the second step, a filter screen of 150-200 meshes is adopted to collect the floating prawn nauplii in the last separation area, and the high-activity prawn nauplii are obtained.
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| CN201610731644.7A CN106234275B (en) | 2016-08-26 | 2016-08-26 | Screening device and screening method for high-activity prawn nauplii |
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| CN201610731644.7A CN106234275B (en) | 2016-08-26 | 2016-08-26 | Screening device and screening method for high-activity prawn nauplii |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1232781B (en) * | 1966-01-26 | 1967-01-19 | Hoyrup Jessen Fa | Device for preparing fish feed |
| CN101904311B (en) * | 2010-08-10 | 2012-10-17 | 广西壮族自治区水产研究所 | Method and device for hatching prawn larva |
| CN103210852B (en) * | 2012-01-19 | 2014-09-10 | 南通中国科学院海洋研究所海洋科学与技术研究发展中心 | Method for obviously improving survival rate of exopalaemon carinicauda in artificial breeding process |
| CN103098744A (en) * | 2013-02-06 | 2013-05-15 | 大连海洋大学 | Aquatic animal illumination selection experimental system |
| CN104585115B (en) * | 2015-01-13 | 2017-02-22 | 宁波大学 | Culturing device and culturing method for hippocampal larvae |
| CN204560628U (en) * | 2015-04-13 | 2015-08-19 | 临沂大学 | The phototactic experimental provision of zooplankton in a kind of research water |
| CN104957072A (en) * | 2015-06-18 | 2015-10-07 | 广东海洋大学 | Parent litopenaeus vannamei breeding system and method |
| CN105494188B (en) * | 2015-12-08 | 2018-12-14 | 中国科学院海洋研究所 | A kind of exopalaemon carinicauda two-part artificial raise seedling method |
| CN205250121U (en) * | 2015-12-30 | 2016-05-25 | 浙江省海洋水产养殖研究所 | Shrimp nauplius larva collection device |
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