CN105689251A - Rapid grading method for young triangle sail mussels - Google Patents
Rapid grading method for young triangle sail mussels Download PDFInfo
- Publication number
- CN105689251A CN105689251A CN201610047683.5A CN201610047683A CN105689251A CN 105689251 A CN105689251 A CN 105689251A CN 201610047683 A CN201610047683 A CN 201610047683A CN 105689251 A CN105689251 A CN 105689251A
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- freshwater mussel
- screen
- screen cloth
- mesh
- sieve
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/02—Hand screens
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
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- 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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- Pretreatment Of Seeds And Plants (AREA)
Abstract
The invention relates to a rapid grading method for young triangle sail mussels and a grading sieve applicable to the method. The rapid grading method includes the steps of triangle sail mussel fishing and triangle sail mussel sieving. In the step of triangle sail mussel fishing, firstly, a nursery pond is closed, and the water level keeps to be 20 cm or above; and secondly, the triangle sail mussels and mud are fished with a fishing net along the walls of the nursery pond and poured into the grading sieve, and a young triangle sail mussel collecting net is arranged under the sieve. According to the step of triangle sail mussel sieving, firstly, 1100-1300 triangle sail mussels are put in the grading sieve, the thickness of a mussel and mud mixture is 5-7 cm, and the mussel and mud mixture is spread flat; secondly, the grading sieve is put into water at the depth of 10 cm, carries out sieving leftwards at the angle of 45 degrees, then carries out sieving rightwards at the angle of 45 degrees, swings left and right for 2-3 minutes, swings up and down, and finally gets back to the original position downwards while a sieve net can not leave the water surface, and the operation lasts for one minute and repeated three times; and thirdly, the mussels in the grading sieve are collected, sampled and packaged. The grading sieve is shaped like a big-end-up circular truncated cone, the bottom surface of the grading sieve is the sieve net with regular hexagonal net holes, and the sieve net on the bottom surface is made of polyethylene materials. By means of the rapid grading method for the young triangle sail mussels and the grading sieve applicable to the method, high-efficiency uniform grading sieving of the triangle sail mussels is realized, the young mussels are prevented from being injured, and the breeding efficiency and cultivation benefits of the triangle sail mussels are improved.
Description
Technical field
The present invention relates to technical field of aquaculture, specifically, be a kind of method of hydriopsis cumingii children's freshwater mussel rapid classification。
Background technology
Impact due to inherited genetic factors, environmental factors and interaction between heredity and environment effect, in hydriopsis cumingii Seedling production, even if the hydriopsis cumingii children freshwater mussel of contemporaneity, same nursery pond, size specification is widely different, the generally individual bigger freshwater mussel Seedling of children freshwater mussel, late growing stage speed is faster。This growth vigor can form 3 kinds of production advantages in pearl culture process: one is that pearl culturing clam individuality is more big, and produced Margarita diameter is more big, and pearl production is also more high。Two is that pearl culturing clam growth is more fast, more early reaches to insert pearl specification, the cycle time that foster freshwater mussel is grown cultured pearls, reduces aquaculture cost and risk。Three is relatively early insert pearl operation, can select classic slotting core workman in the industry, ensure and insert nuclear mass, form competitive advantage。Big specification, fast-growth hydriopsis cumingii seed formed these production advantages, promote hydriopsis cumingii selection and use work fast development。The pond phase is gone out in seed, carrying out screening first and can reduce the cost of selection and use, improve breeding efficiency, selecting of this stage is mainly picked as master with manual at present, but hydriopsis cumingii children's freshwater mussel individuality in this stage is little, body constitution is more weak, selects by hand and very easily causes freshwater mussel Seedling to produce stress, affects freshwater mussel Seedling late growing stage, it is not suitable for Large-scale Screening operation, and the concha Anodonta seu Cristaria of children freshwater mussel is very easily damaged, misoperation easy damaged concha Anodonta seu Cristaria during such as classification, time serious, freshwater mussel Seedling there will be the major part phenomena of mortality。Therefore, shortcoming for prior art urgently invents a kind of hydriopsis cumingii children freshwater mussel rapidly and efficiently stage division, the method is possible not only to play a great role in selection and use, and in breeding production, carry out freshwater mussel Seedling classification, the nutrition of ingesting etc. can effectively alleviated between big freshwater mussel and little freshwater mussel is competed, and cultivates the pearl culturing clam reaching to insert pearl specification more at high proportion, improves culture benefit。
Summary of the invention
It is an object of the invention to for deficiency of the prior art, it is provided that a kind of method of hydriopsis cumingii children's freshwater mussel rapid classification and be applicable to the classifying screen of the method。
For realizing the purpose of rapid classification, the present invention adopts the technical scheme that:
A kind of method of hydriopsis cumingii children's freshwater mussel rapid classification, described method comprises the steps:
Copy freshwater mussel: 1) close nursery pond, improve water level in water pool, making the distance that water level reaches from pond stalk is 3～5cm；2) use the direction that the pool wall along nursery pond copied by net to be ferreted out freshwater mussel and mud, pour in classifying screen, at classifying screen underlay one freshwater mussel Seedling collecting net；
Sieve freshwater mussel: 1) classifying screen loads 1100-1300 hydriopsis cumingii, freshwater mussel mud mixture thickness is 5-7cm, tiling；2) left and right sides of classifying screen with the hands it is held in respectively, submerge 10cm in water by classifying screen, first it is sieved to the position of 45° angle to the left, it is sieved to the right the position of 45° angle again, rolls 2～3 minutes, then rock up and down, as long as mesh screen leaves the water surface when upwards rocking, return to origin-location still further below, continue 1 minute, repeat 3 times；3) collect the remaining freshwater mussel more than mesh specification in classifying screen, then draw a design, pack。
Described net is copied and is made up of handle and " D " shape screen cloth, and described handle is cylindrical, and handle is connected with the arc tips of " D " shape screen cloth。
The truncated cone-shaped that described classifying screen is big up and small down, it is made up of bottom surface screen cloth and side screen two parts；Described bottom surface screen cloth is mesh is orthohexagonal screen cloth, and described side screen is mesh is foursquare screen cloth。
Preferably, the truncated cone-shaped that described classifying screen is big up and small down, its upper end axis of great circle is 60cm, and lower end axis of small circle is 45cm, and height is 15cm。
Preferably, the mesh specification of described classifying screen bottom surface screen cloth is as follows: regular hexagon, and the length of side is 0.75cm, 1cm, 1.5cm, 1.75cm respectively, can need to select various sizes of mesh screen according to classification。
Preferably, the square being sized to 100cm of the freshwater mussel Seedling collecting net of pad below described classifying screen, its mesh is the length of side is the square of 0.5cm。
Preferably, the described classifying screen bottom surface orthohexagonal length of side of screen cloth mesh is 1/2nd of the minimum individual body length of described classification children freshwater mussel。
Preferably, described classifying screen bottom surface screen cloth is made up of polythene material。
The invention has the advantages that:
(1) present invention optimizes the shape of the material of mesh screen, shape and mesh；The truncated cone-shaped that classifying screen is big up and small down, bottom surface screen cloth is mesh is orthohexagonal screen cloth, is made up of polythene material, and this design can improve the screening effect of mesh screen, it is to avoid children freshwater mussel is impaired in classification process。
(2) present invention optimizes screening process, it is achieved that quickly, with no damage by different size hydriopsis cumingii children's freshwater mussel classification；In large-scale production cultivates, filter out freshwater mussel of uniform size, reduce the competition between big freshwater mussel and little freshwater mussel, it is thus achieved that more pearl culturing clams reaching to insert pearl specification, reduce and when inserting core, select workload, save labour, it is thus achieved that bigger economic benefit。
Accompanying drawing explanation
The structural representation that accompanying drawing 1 is copied for net of the present invention。
Accompanying drawing 2 is the top view of classifying screen of the present invention。
Accompanying drawing 3 is the structural representation of classifying screen of the present invention。
The rapid classification method schematic diagram of accompanying drawing 4 present invention。
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is expanded on further。Should be understood that these embodiments are merely to illustrate the present invention rather than restriction the scope of the present invention。In addition, it is to be understood that after having read the content that the present invention records, the present invention can be made various changes or modifications by those skilled in the art, and these equivalent form of values fall within the application appended claims limited range equally。
Embodiment 1
Before classification, determine the mesh size of classifying screen according to selection-breeding intensity, if selection-breeding intensity is 10%, estimate the length of the front 10% hydriopsis cumingii minimum individuality of children freshwater mussel, it is then determined that the mesh size of classifying screen。To screen the hydriopsis cumingii more than 3cm, concrete operations are as follows:
Copy freshwater mussel: 1) close nursery pond, improve water level in water pool, making the distance that water level reaches from pond stalk is 3～5cm；2) direction (in Fig. 4 the method shown in arrow) that the pool wall along nursery pond copied by net is used to be ferreted out freshwater mussel and mud, water rinses one time, pour in classifying screen, one freshwater mussel Seedling collecting net of classifying screen underlay, the regular hexagon screen cloth that now the bottom surface screen cloth of classifying screen selects the mesh length of side to be 1.5cm。
Sieve freshwater mussel: 1) classifying screen loads about 1200 hydriopsis cumingiis, the freshwater mussel mud about 5-7cm of mixture thickness, after tiling, start sieve。2) workman's first both hands are held in the left and right sides of classifying screen respectively, as Fig. 4 stands on " Δ " place, and 10cm in water that classifying screen is submerged, for ensureing that freshwater mussel is submerged in water, can adjust as one sees fit。Workman's first held by both hands classifying screen, is first sieved to the position of 45° angle to the left, then is sieved to the right the position of 45° angle, so roll 2～3 minutes, then rock up and down, as long as classifying screen leaves the water surface when upwards rocking, return to origin-location still further below, continue 1 minute, repeat 3 times。3) freshwater mussel more than 3cm remaining in classifying screen is put in a big basin being equipped with freshwater mussel Seedling collecting net, then draw a design, pack。From the freshwater mussel of packing, take out sub-fraction, and put in a little basin, stir evenly gently, weigh up the freshwater mussel Seedling of 100 grammes per square metres with little scale, put desk supernatant point quantity (can by toothpick)。Sampling 3 times, average, then claim the gross weight of all freshwater mussels with large scale, calculate total freshwater mussel Seedling quantity and concha Anodonta seu Cristaria breakage rate, concha Anodonta seu Cristaria breakage rate is less than 0.25%。
Embodiment 2
It is embodied as case 2: children freshwater mussel carries out classification after going out pond, and according to the principle that specification is consistent, cage culture is divided in a point pond, as freshwater mussel Seedling is divided into 3 specification grades of more than below 2.5cm, 2.5-3.0cm and 3.0cm。Specifically comprise the following steps that
Copy freshwater mussel: 1) close nursery pond, improve water level in water pool, making the distance that water level reaches from pond stalk is 3～5cm；2) direction (in Fig. 4 the method shown in arrow) that the pool wall along nursery pond copied by net is used to be ferreted out freshwater mussel and mud, water rinses one time, pour in classifying screen, one freshwater mussel Seedling collecting net of classifying screen underlay, now the bottom surface screen cloth of classifying screen selects mesh to be the length of side is the regular hexagon screen cloth of 1.5cm。
Sieve freshwater mussel: 1) classifying screen loads about 1200 hydriopsis cumingiis, the freshwater mussel mud about 5-7cm of mixture thickness, after tiling, start sieve；2) workman's first both hands are held in the left and right sides of classifying screen respectively, as Fig. 4 stands on " Δ " place, and 10cm in water that classifying screen is submerged, for ensureing that freshwater mussel is submerged in water, can adjust as one sees fit。Workman's first held by both hands classifying screen, is first sieved to the position of 45° angle to the left, then is sieved to the right the position of 45° angle, so roll 2～3 minutes, then rock up and down, as long as mesh screen leaves the water surface when upwards rocking, return to origin-location still further below, continue 1 minute, repeat 3 times；3) freshwater mussel more than 3cm remaining in classifying screen is put in a big basin being equipped with freshwater mussel Seedling collecting net, then pack；4) the young freshwater mussel less than 3cm is collected, now the bottom surface screen cloth of classifying screen selects mesh to be the length of side is the regular hexagon screen cloth of 1.25cm, continue sieve, repeat step 1 and step 2, put into remaining in classifying screen in a big basin being equipped with freshwater mussel Seedling collecting net more than 2.5cm and the freshwater mussel less than 3cm, then pack；5) the remaining freshwater mussel less than 2.5cm is put in a big basin being equipped with freshwater mussel Seedling collecting net, then pack；6) draw a design, sub-fraction is taken out respectively from the freshwater mussel of packing, and put in a little basin, stir evenly gently, weigh up the freshwater mussel Seedling of 100 grammes per square metres with little scale, put desk supernatant point quantity (can by toothpick), sample 3 times, average, then claim the gross weight of all freshwater mussels with large scale, calculating total freshwater mussel Seedling quantity and concha Anodonta seu Cristaria breakage rate, concha Anodonta seu Cristaria breakage rate is less than 0.25%。
The structure that embodiment 3 net of the present invention is copied
Refer to Fig. 1。Fig. 1 is the structural representation that net of the present invention is copied, and described net is copied and is made up of handle 1 and " D " shape screen cloth 2；Handle 1 is cylindrical, and diameter is about 4cm, is about as 65cm；Handle 1 is connected with the arc tips of " D " shape screen cloth 2。During operation, use the non-handle end that net is copied to press close at the bottom of pond, to be ferreted out freshwater mussel and mud along the direction of the pool wall of nursery pond, rinse one time in water, be subsequently poured in classifying screen, so ensure that all of freshwater mussel Seedling is all ferreted out, it is to avoid unnecessary economic loss and waste。
The structure of embodiment 4 classifying screen of the present invention
Refer to Fig. 2 and Fig. 3。Fig. 3 is the structural representation of classifying screen, and Fig. 2 is the top view of classifying screen, the truncated cone-shaped that described classifying screen is big up and small down, and it is made up of bottom surface screen cloth 3 and side screen 4 two parts；Described bottom surface screen cloth 3 is mesh is orthohexagonal screen cloth, and side screen 4 is mesh is foursquare screen cloth, and the axis of great circle of truncated cone-shaped upper end is 60cm, and axis of small circle is 45cm；Described bottom surface screen cloth 3 is made up of polythene material, and side screen 4 is made up of iron wire。During operation, pouring the freshwater mussel of classifying screen into and the THICKNESS CONTROL of mud is 5-7cm, in classifying screen, uppermost mud mixture is positioned at below the water surface 3～5cm, rocks classifying screen and makes to be sieved in the freshwater mussel Seedling collecting net under classifying screen less than the freshwater mussel Seedling of bottom surface screen cloth mesh size；When rocking, first shaking to the left and making bottom surface screen cloth and the water surface be 45 °, then shakes to the right that to make bottom surface screen cloth and the water surface be 45 °, persistently 2～3 minutes；Then rock up and down, as long as mesh screen leaves the water surface when upwards rocking, return to origin-location still further below, continue 1 minute, repeat 3 times。
It should be noted that in the present invention,
Described when copying freshwater mussel, it is 3～5cm that the water level of nursery pond need to adjust the distance from pond stalk, and this design can make pond interior edema amount sufficient, it is simple to sieve freshwater mussel, it is prevented that copy concha Anodonta seu Cristaria in freshwater mussel process and be damaged, and reduces freshwater mussel Seedling damage probability。Described net is destroyed the direction (in Fig. 4 the method shown in arrow) of the pool wall along nursery pond and is ferreted out freshwater mussel and mud, so can ensure that all freshwater mussel Seedlings are all ferreted out, it is to avoid unnecessary economic loss and waste；Loading 1100-1300 hydriopsis cumingii in described classifying screen, freshwater mussel mud mixture thickness is 5-7cm, it is prevented that load too much freshwater mussel Seedling, extrude mutually between too much freshwater mussel Seedling, destroy the concha Anodonta seu Cristaria of freshwater mussel Seedling, cause economic loss, classifying screen loads 1100-1300 simultaneously, be suitable for rocking operation of sieving。Described classifying screen submerges 10cm in water, and this design is conveniently had an effect sieve freshwater mussel, and the damage of freshwater mussel Seedling is little。During described sieve freshwater mussel, submerge 10cm in water by classifying screen, first it is sieved to the position of 45° angle to the left, it is sieved to the right the position of 45° angle again, rolls 2～3 minutes, then rock up and down, the time of rolling can not be oversize, prevent from destroying concha Anodonta seu Cristaria outlet, meanwhile, use this kind of shaking means can quickly by size freshwater mussel Seedling and mud-water separation and do not damage concha Anodonta seu Cristaria。
The above is only the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from the inventive method; can also making some improvement and supplement, these improve and supplement and also should be regarded as protection scope of the present invention。
Claims (10)
1. the method for hydriopsis cumingii children's freshwater mussel rapid classification, it is characterised in that described method comprises the steps:
Copy freshwater mussel: 1) close nursery pond, improve water level in water pool, making the distance that water level reaches from pond stalk is 3～5cm；2) use the direction that the pool wall along nursery pond copied by net to be ferreted out freshwater mussel and mud, pour in classifying screen, at classifying screen underlay freshwater mussel Seedling collecting net；
Sieve freshwater mussel: 1) classifying screen loads 1100-1300 hydriopsis cumingii, freshwater mussel mud mixture thickness is 5-7cm, tiling；2) left and right sides of classifying screen with the hands it is held in respectively, submerge 10cm in water by classifying screen, first it is sieved to the position of 45° angle to the left, it is sieved to the right the position of 45° angle again, rolls 2～3 minutes, then rock up and down, as long as mesh screen leaves the water surface when upwards rocking, return to origin-location still further below, continue 1 minute, repeat 3 times；3) collect the remaining freshwater mussel more than mesh specification in classifying screen, then draw a design, pack。
2. the method for hydriopsis cumingii children's freshwater mussel rapid classification according to claim 1, it is characterised in that described net is copied and is made up of handle and " D " shape screen cloth, described handle is cylindrical, and handle is connected with the arc tips of " D " shape screen cloth。
3. the method for hydriopsis cumingii children's freshwater mussel rapid classification according to claim 1, it is characterised in that the truncated cone-shaped that described classifying screen is big up and small down, it is made up of bottom surface screen cloth and side screen two parts；Described bottom surface screen cloth is mesh is orthohexagonal screen cloth, and described side screen is mesh is foursquare screen cloth。
4. the method for hydriopsis cumingii children's freshwater mussel rapid classification according to claim 3, it is characterised in that the described bottom surface orthohexagonal length of side of screen cloth mesh is 0.75-1.75cm。
5. the method for hydriopsis cumingii children's freshwater mussel rapid classification according to claim 3, it is characterised in that the described foursquare length of side of side screen mesh is the square of 0.5cm。
6. the method for hydriopsis cumingii children's freshwater mussel rapid classification according to claim 3, it is characterised in that the described bottom surface orthohexagonal length of side of screen cloth mesh is 1/2nd of the minimum individual body length of described classification children freshwater mussel。
7. the method for hydriopsis cumingii children's freshwater mussel rapid classification according to claim 3, it is characterised in that described bottom surface screen cloth is made up of polythene material。
8. the method for hydriopsis cumingii children's freshwater mussel rapid classification according to claim 1, it is characterised in that the mesh of described freshwater mussel Seedling collecting net is square。
9. the classifying screen of hydriopsis cumingii children's freshwater mussel rapid classification method described in claim 1, it is characterised in that the truncated cone-shaped that described classifying screen is big up and small down, is made up of bottom surface screen cloth and side screen two parts；Described bottom surface screen cloth is mesh is orthohexagonal screen cloth；Described side screen is mesh is foursquare screen cloth。
10. classifying screen according to claim 9, it is characterized in that, described truncated cone-shaped classifying screen upper end axis of great circle is 60cm, described truncated cone-shaped classifying screen lower end axis of small circle is 45cm, described bottom surface screen cloth is made up of polythene material, and the length of side of described bottom surface screen cloth regular hexagon mesh is 0.75-1.75cm。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610047683.5A CN105689251A (en) | 2016-01-25 | 2016-01-25 | Rapid grading method for young triangle sail mussels |
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| CN201610047683.5A CN105689251A (en) | 2016-01-25 | 2016-01-25 | Rapid grading method for young triangle sail mussels |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108925519A (en) * | 2018-06-28 | 2018-12-04 | 庞成军 | It is a kind of to sort the fishing device of classification for catching sea urchin |
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| CN108925519A (en) * | 2018-06-28 | 2018-12-04 | 庞成军 | It is a kind of to sort the fishing device of classification for catching sea urchin |
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