CN105766821B - Chinese sturgeon larvae is layered the application method of collecting net - Google Patents
Chinese sturgeon larvae is layered the application method of collecting net Download PDFInfo
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- CN105766821B CN105766821B CN201610133509.2A CN201610133509A CN105766821B CN 105766821 B CN105766821 B CN 105766821B CN 201610133509 A CN201610133509 A CN 201610133509A CN 105766821 B CN105766821 B CN 105766821B
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- collecting net
- prelarva
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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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- Biodiversity & Conservation Biology (AREA)
- Farming Of Fish And Shellfish (AREA)
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Abstract
Chinese sturgeon larvae is layered collecting net, single layer collecting net includes rectangle network interface, dictyosome, prelarva collector, slide fastener and linking fastener, single layer collecting net is integrally wedge shaped, most external is rectangle network interface, and dictyosome is fixed on network interface frame, has linking fastener on network interface frame, slide fastener is arranged at dictyosome bottom, least significant end is connected with prelarva collector, and one end, which is fixed on by stainless steel chain on linking fastener, between single layer collecting net is connected with each other, and prelarva collector is connected with each other by the other end by lead.In use, after being connected with each other between multiple single layer collecting nets into the water, then opening prelarva collector and collecting fry.The present invention can save manpower, not influence shipping, be suitble in the Changjiang river medium and long-term applications.
Description
Technical field
The invention belongs to aquatic ecologicals to monitor field, be related specifically to Chinese sturgeon larvae collecting net and application method.
Technical background
Mandarin sturgeon（Acipenser sinensis Gray, 1835）It is a kind of large-scale anadromous migration fish, spawning ground is main
It is distributed in the Changjiang river, for Chinese Endemic fish, the poles IUCN danger grade（CR）Protect species.Although mandarin sturgeon field Population gradually subtracts
It is few, but field reproductive behavior still occurs.2013-2014 has happened variation, is not monitored under Ge Zhou Ba within continuous 2 years
To the oviposition behavior of mandarin sturgeon, it has been determined that the fact that mandarin sturgeon did not laid eggs in 2013.Although Ge Zhou Ba oviposition in 2014
Field cut-off did not monitored oviposition behavior December 31, but 2015 found that the first tail Acipenser sinensis juvenile fish rose April 16 in entrance of Changjiang River,
7, August is peak, amounts to and finds more than 3000 tail of juvenile fish, it is determined that reproductive behavior has occurred in Wild Chinese Sturgeon within 2014.Mandarin sturgeon
It is that spawning ground is changed or laid eggs and continues to postpone.Under the overall background of Yangtze River waterway regulation, to ensure waterway regulation not
Spawning ground is destroyed, determines the position of Chinese sturgeon spawning to protecting the most important of this Changjiang river flagship species of mandarin sturgeon again.
Invention content
The purpose of the present invention is to provide a kind of Chinese sturgeon larvaes to be layered collecting net, and the collecting net is by single prelarva collecting net
Dress fills as the collecting net of multilayer, and the collecting net is simple in structure, easy to use.
To achieve the above object, the technical scheme is that：
Chinese sturgeon larvae is layered collecting net, it is characterised in that：Single layer collecting net includes rectangle network interface, dictyosome, prelarva receipts
Storage, slide fastener and linking fastener, single layer collecting net is integrally wedge shaped, and most external is rectangle network interface, and dictyosome is fixed on network interface frame
On, there is linking fastener on network interface frame, slide fastener arranged at dictyosome bottom, and least significant end is connected with prelarva collector, one between single layer collecting net
End, which is fixed on by stainless steel chain on linking fastener, to be connected with each other, and prelarva collector is connected with each other by the other end by lead.
Chinese sturgeon larvae is layered the application method of collecting net, it is characterised in that：
Steps are as follows for this method：
1. Multilayer Network prepares：The number that single layer collecting net is selected according to the placement location depth of water, one end between single layer collecting net
Pass through stainless steel chain（6）It is fixed on linking fastener（5）Upper interconnection, the other end pass through lead（8）By prelarva collector（3）Phase
Connect composition Multilayer Network, checks the slide fastener on each single layer collecting net（4）, it is allowed to closed state；
2. putting net：Weight is fixed on the linking fastener of single layer collecting net lower end of bottommost, then according to bottommost
Single layer collecting net first enters water, and the sequence that water is entered after top single layer collecting net is off line；
3. the fixation of tether：It is fixed on the linking fastener on top single layer collecting net after entire Multilayer Network enters water
Tether makes Multilayer Network perpendicular to water (flow) direction, and screen frame long side is horizontal, fixed screen frame.Meanwhile according to the water surface and admittedly
The height of fixed point, fixed lead, makes prelarva collector and dictyosome bottom level and dictyosome is made to be sufficiently spread out；
4. water：Lead is discharged first, then discharges tether, plays water sequence according to layer net from the water surface to water-bed sequence,
Water surface first layer single layer collecting net screen frame → dictyosome → prelarva collector is discharged successively, after the water outlet of prelarva collector, by second
The lead release of layer single layer collecting net, then plays the subsequent single layer collecting net of water with similar method；
5. prelarva is collected：Slide fastener is opened, the interior gleanings in prelarva collector of collecting net body find Chinese sturgeon fry.
The positive effect of the present invention is：Ovum is adopted with river bottom to compare, and can save manpower, and can be positioned over offshore water for a long time
In, shipping is not influenced, can also be placed during the Spring Festival, the continuity of monitoring is increased.Design structure of the present invention is reasonable, operation
It is convenient, the 1-7 days interior characteristics to move vertically along water layer of prelarva have just been hatched for mandarin sturgeon, are designed and are collected the more of Chinese sturgeon larvae
Layer net, application effect is notable, is suitble to apply in the Changjiang river, is laid eggs particularly suitable for mandarin sturgeon by the monitoring to Chinese sturgeon larvae
The monitoring of field.
Description of the drawings
Fig. 1 is schematic structural view of the invention；
Fig. 2 is single layer collecting net structural schematic diagram.
Specific implementation mode
Below in conjunction with the accompanying drawings and the specific implementation mode that further illustrates the present invention of specific embodiment.
Chinese sturgeon larvae layering collecting net is assembled by single layer collecting net, and single layer collecting net is integrally wedge shaped, including length
Rectangular network interface 1, dictyosome 2, prelarva collector 3, slide fastener 4 and linking fastener 5.1 size of network interface is long 1.5m × wide 0.7m, not by 403
Rust steel steel pipe 3.5cm × 2cm is welded, and is to prolong the service life using rectangle stainless steel, and convenient for pressing dictyosome 2
On 1 frame of network interface.Dictyosome 2 is in 4 face cone shapes, and bed-plate dimension is to increase 2cm on the basis of 1 each length of side of network interface, cone four sides by
40 mesh polythene fishing nets sew, and net bottom size is：The isosceles triangle net of bottom edge 1.52m, side 2m, top surface is：Bottom edge
The isosceles triangle net of 1.52m, side 2.1m, two sides are right angled triangle face, size 0.72m, 2m, 2.1m.Prelarva
Collector 3 is by the rectangular steel tube of 8 × 8cm after cutting at high 10cm, the square cylinder of back cover, top surface opening, by 2 top of dictyosome use
Steel bar pressure is pricked on 3 periphery of prelarva collector, and flow can then be stayed in by dictyosome 2, Chinese sturgeon larvae in prelarva collector 3.Slide fastener 4
At away from 2 top 30cm of dictyosome, dictyosome 2 is slit out here, and slide fastener both sides are sewed respectively on isometric trimming perimeter,
Winning for dictyosome top 30cm and 3 part of prelarva collector can be achieved by the closure of slide fastener, design herein is that dictyosome goes out
It after water, unzips and is removed together with 4, facilitate the prelarva in acquisition collector 3.When putting net again, slide fastener, unicom prelarva are closed
Collector 3 is put into togerther in water.Linking fastener 5 is STAINLESS STEEL CHAINS buckle, is located at the long side of rectangular network interface, each long side welding
Two linking fasteners, at each 20cm in positional distance both ends, and positioned at the bottom surface of prelarva collector 3（Network interface is open top face）.Chain
Buckle 5 plays the role of being affiliated to other objects, the hanging point as chain and hanging rope.
Put overall effect when net：Single layer collecting net is connected along plumb position, stereoeffect is presented, as
Chinese sturgeon larvae is layered collecting net.In ideal Lentic environment, vertical direction layering.
Using stainless steel chain 6, single layer collecting net is connected by linking fastener 5, forms multilayered structure, adjacent list
6 length of chain is 1m between layer collecting net.Bottommost hangs weight 7, and weight 7 plays gravity stretching action, prevents in flowing water ring
Multilayer Network is because of flow over-tilting in border.Lead 8 connects prelarva collector 3 two-by-two, lead 8 between adjacent prelarva collector 3
Length be the single high chain length between adjacent layer net of net, overall length 1.7m, the lead 8 of adjacent monolayer collecting net can be from
By connecting and unlocking, 8 water surface top of lead is fixed on certain height, keeps prelarva collector 3 parallel with 2 bottom of dictyosome, makes collection
Prelarva enter collector 3, increase and collect prelarva amount and under the protection of collector 3, increase the time-to-live of fry.
Overall effect when hauling：When hauling, lead 8 is discharged, prelarva collector 3 and dictyosome 2 will under the effect of gravity
Sink, prelarva is closed in 2 rear end of dictyosome and prelarva collector 3, without escaping from network interface, increase collect prelarva at
Power.When layer net water in accordance with the order from top to bottom, it is discharged one by one, after first screen frame and dictyosome are discharged, second layer net
Lead 8 discharged from the prelarva collector of first layer net.Similarly, water second layer net is played, until all layers have been netted water.All
After layer has netted water, slide fastener 4 on each dictyosome is opened, all gleanings is taken out in rear end dictyosome and prelarva collector 3, finds out mesh
Gleanings prelarva is marked, dictyosome screen frame is cleaned out, starts next round and puts net.
Application method embodiment one
The application of Chinese sturgeon larvae layering collecting net at the 5m depth of waters.
1. Multilayer Network prepare 5m deep water body placed layer net numbers be 5m/1.7m/ cover 3 sets of ≈, by 3 single layer collecting nets it
Between connected by chain 6.It checks slide fastener 4, is allowed to closed state.The single layer collecting net bottom hung weight 7 of bottommost.
2. put net puts net according to inverted order, the single layer collecting net of bottommost first enters water, the suitable of water is entered after top monolayer collecting net
Sequence is off line：Weight 7 → screen frame, 1 → dictyosome, 2 → prelarva collection 3 → next lead 8 hangs over previous prelarva collector → the
One prelarva collector enters water → next collecting net and enters water（Repeat preceding step）.The water that enters of wherein screen frame is operated by two people,
The connection for entering water and prelarva collector and lead of dictyosome is by another one man operation.
3. being fixed on after entire Multilayer Network enters water for tether, starts fixed tether 9, make Multilayer Network perpendicular to water (flow) direction,
And 2 long side of screen frame is horizontal, fixed screen frame.Meanwhile according to the height of the water surface and fixed point, fixed lead 8 makes prelarva
Collector and dictyosome bottom level simultaneously make dictyosome be sufficiently spread out.
4. water first discharges lead 8, then discharges tether 9, water sequence is played according to layer net from the water surface to water-bed sequence,
Screen frame → dictyosome → prelarva collector of water surface first layer net is discharged successively, after the water outlet of prelarva collector, by second layer net
Lead 8 also discharge, then with similar method rise the subsequent layer net of water.
5. prelarva, which is collected, opens slide fastener 4, the gleanings in collecting net body and in prelarva collector find Chinese sturgeon larvae.
6. net cleaning screen frame dictyosome is put in cleaning again, then repeatedly 1-5 is walked.
Application method embodiment two
The two .8.5m depth of waters are arranged net
1. it is that 8.5m/1.7m/ covers=5 sets that Multilayer Network, which prepares 8.5m deep water body placed layer net numbers, 5 single layers are collected
It is connected by chain 6 between net.It checks slide fastener 4, is allowed to closed state.The single layer collecting net bottom hung weight 7 of bottommost.
2. put net puts net according to inverted order, the single collecting net of bottommost first enters water, enters the suitable of water after the single collecting net in top
Sequence is off line：Weight 7 → screen frame, 1 → dictyosome, 2 → prelarva collection 3 → next lead 8 hangs over previous prelarva collector → the
One prelarva collector enters water → next collecting net and enters water（Repeat preceding step）.The water that enters of wherein screen frame is operated by two people,
The connection for entering water and prelarva collector and lead of dictyosome is by another one man operation.
3. being fixed on after entire Multilayer Network enters water for tether, starts fixed tether 9, make Multilayer Network perpendicular to water (flow) direction,
And 2 long side of screen frame is horizontal, fixed screen frame.Meanwhile according to the height of the water surface and fixed point, fixed lead 8 makes prelarva
Collector and dictyosome bottom level simultaneously make dictyosome be sufficiently spread out.
4. water first discharges lead 8, then discharges tether 9, water sequence is played according to layer net from the water surface to water-bed sequence,
Screen frame → dictyosome → prelarva collector of water surface first layer net is discharged successively, after the water outlet of prelarva collector, by second layer net
Lead 8 also discharge, then with similar method rise the subsequent layer net of water.
5. prelarva, which is collected, opens slide fastener 4, the gleanings in collecting net body and in prelarva collector find Chinese sturgeon larvae.
6. net cleaning screen frame dictyosome is put in cleaning again, then repeatedly 1-5 is walked.
Application method embodiment three
The three .10m depth of waters are arranged net
1. it is that 10m/1.7m/ covers 6 sets of ≈ that Multilayer Network, which prepares 10m deep water body placed layer net numbers, by 6 single layer collecting nets
Between connected by chain 6.It checks slide fastener 4, is allowed to closed state.The single layer collecting net bottom hung weight 7 of bottommost.
2. put net puts net according to inverted order, the single collecting net of bottommost first enters water, enters the suitable of water after the single collecting net in top
Sequence is off line：Weight 7 → screen frame, 1 → dictyosome, 2 → prelarva collection 3 → next lead 8 hangs over previous prelarva collector → the
One prelarva collector enters water → next collecting net and enters water（Repeat preceding step）.The water that enters of wherein screen frame is operated by two people,
The connection for entering water and prelarva collector and lead of dictyosome is by another one man operation.
3. being fixed on after entire Multilayer Network enters water for tether, starts fixed tether 9, make Multilayer Network perpendicular to water (flow) direction,
And 2 long side of screen frame is horizontal, fixed screen frame.Meanwhile according to the height of the water surface and fixed point, fixed lead 8 makes prelarva
Collector and dictyosome bottom level simultaneously make dictyosome be sufficiently spread out.
4. water first discharges lead 8, then discharges tether 9, water sequence is played according to layer net from the water surface to water-bed sequence,
Screen frame → dictyosome → prelarva collector of water surface first layer net is discharged successively, after the water outlet of prelarva collector, by second layer net
Lead 8 also discharge, then with similar method rise the subsequent layer net of water.
5. prelarva, which is collected, opens slide fastener 4, the gleanings in collecting net body and in prelarva collector find Chinese sturgeon larvae.
6. net cleaning screen frame dictyosome is put in cleaning again, then repeatedly 1-5 is walked.
Claims (1)
1. Chinese sturgeon larvae is layered the application method of collecting net, it is characterised in that：
The single layer collecting net that Chinese sturgeon larvae is layered collecting net includes rectangle network interface（1）, dictyosome（2）, prelarva collector（3）,
Slide fastener（4）And linking fastener（5）, single layer collecting net is integrally wedge shaped, and most external is rectangle network interface（1）, dictyosome（2）It is fixed on net
On mouth frame, network interface（1）There is linking fastener on frame（5）, dictyosome（2）Slide fastener is arranged at bottom（4）, least significant end is connected with prelarva collector
（3）, one end passes through stainless steel chain between single layer collecting net（6）It is fixed on linking fastener（5）Upper interconnection, the other end is by leading
Rope（8）By prelarva collector（3）It is connected with each other；
Steps are as follows for this method：
Step 1: Multilayer Network prepares：The number that single layer collecting net is selected according to the placement location depth of water, one end between single layer collecting net
Pass through stainless steel chain（6）It is fixed on linking fastener（5）Upper interconnection, the other end pass through lead（8）By prelarva collector（3）Phase
Connect composition Multilayer Network, checks the slide fastener on each single layer collecting net（4）, it is allowed to closed state；
Step 2: putting net：By weight（7）It is fixed on the linking fastener of the single layer collecting net lower end of bottommost（5）On, then according to most
The single layer collecting net of bottom first enters water, and the sequence that water is entered after top single layer collecting net is off line；
Step 3: the fixation of tether：After entire Multilayer Network enters water, the linking fastener on top single layer collecting net（5）It is upper solid
Determine tether（9）, make Multilayer Network perpendicular to water (flow) direction, and screen frame long side is horizontal, fixed screen frame, meanwhile, according to water
The height in face and fixed point, fixed lead（8）, make prelarva collector（3）And dictyosome（2）Bottom level simultaneously makes dictyosome fully open up
It opens；
Step 4: playing water：First by lead（8）Release, then discharge tether（9）, water sequence is played according to layer net from the water surface to the bottom
Sequence, water surface first layer single layer collecting net screen frame → dictyosome → prelarva collector is discharged successively, waits for prelarva collector（3）Water outlet
Afterwards, by the lead of second layer single layer collecting net（8）Release, then plays the subsequent single layer collecting net of water with the aforedescribed process；
Step 5: prelarva is collected：Open slide fastener（4）, in collecting net body and prelarva collector（3）In gleanings, find China
Sturgeon fry.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610133509.2A CN105766821B (en) | 2016-03-10 | 2016-03-10 | Chinese sturgeon larvae is layered the application method of collecting net |
Applications Claiming Priority (1)
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| CN201610133509.2A CN105766821B (en) | 2016-03-10 | 2016-03-10 | Chinese sturgeon larvae is layered the application method of collecting net |
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| Publication Number | Publication Date |
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| CN105766821A CN105766821A (en) | 2016-07-20 |
| CN105766821B true CN105766821B (en) | 2018-10-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114544218A (en) * | 2022-01-26 | 2022-05-27 | 河海大学 | Automatic biological sample collecting device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1781367A (en) * | 2004-12-03 | 2006-06-07 | 中国水产科学研究院东海水产研究所 | Single dragging rope self expanding type single ship middle layer dragnet |
| CN202310914U (en) * | 2011-11-16 | 2012-07-11 | 中国水产科学研究院黑龙江水产研究所 | River multi-water-layer fish larvae collecting device |
| CN202635372U (en) * | 2012-06-01 | 2013-01-02 | 中国水产科学研究院珠江水产研究所 | River pelagic egg and fry quantitative collection net |
| CN204762903U (en) * | 2015-08-05 | 2015-11-18 | 中国水产科学研究院黑龙江水产研究所 | Fixing device of drift nature roe, young afvanced fry investigation net |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6065239A (en) * | 1999-09-27 | 2000-05-23 | Thomas; Kent R. | Twist closure drop fishing net |
| US6684554B2 (en) * | 2001-09-27 | 2004-02-03 | Kuo-Pin Yu | Hand net frame |
-
2016
- 2016-03-10 CN CN201610133509.2A patent/CN105766821B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1781367A (en) * | 2004-12-03 | 2006-06-07 | 中国水产科学研究院东海水产研究所 | Single dragging rope self expanding type single ship middle layer dragnet |
| CN202310914U (en) * | 2011-11-16 | 2012-07-11 | 中国水产科学研究院黑龙江水产研究所 | River multi-water-layer fish larvae collecting device |
| CN202635372U (en) * | 2012-06-01 | 2013-01-02 | 中国水产科学研究院珠江水产研究所 | River pelagic egg and fry quantitative collection net |
| CN204762903U (en) * | 2015-08-05 | 2015-11-18 | 中国水产科学研究院黑龙江水产研究所 | Fixing device of drift nature roe, young afvanced fry investigation net |
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