CN103891682A - Net for sampling nekton in complex terrain waters and weaving method thereof - Google Patents
Net for sampling nekton in complex terrain waters and weaving method thereof Download PDFInfo
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- CN103891682A CN103891682A CN201410137186.5A CN201410137186A CN103891682A CN 103891682 A CN103891682 A CN 103891682A CN 201410137186 A CN201410137186 A CN 201410137186A CN 103891682 A CN103891682 A CN 103891682A
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- 238000005070 sampling Methods 0.000 title claims abstract description 18
- 238000009941 weaving Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000003643 water by type Substances 0.000 title abstract description 4
- 239000002775 capsule Substances 0.000 claims description 24
- 238000009954 braiding Methods 0.000 claims description 16
- 210000001015 abdomen Anatomy 0.000 claims description 12
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 230000004075 alteration Effects 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 239000013535 sea water Substances 0.000 claims description 2
- 238000011160 research Methods 0.000 abstract description 8
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000012876 topography Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 241000238557 Decapoda Species 0.000 description 1
- 241000356842 Larimichthys polyactis Species 0.000 description 1
- 241001533364 Portunus trituberculatus Species 0.000 description 1
- 241001274979 Selenotoca multifasciata Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012620 biological material Substances 0.000 description 1
- 239000012472 biological sample Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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- 238000009510 drug design Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
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Abstract
The invention relates to a net for sampling nekton in complex terrain waters and a weaving method thereof. The net comprises wings, a cover, a body and a sac. Each wing is composed of a back wing and a middle wing and is integrally woven; meshes of each wing are increased by means of a triple longitudinal structure. During weaving, one longitudinal mesh-increasing structure is woven to each of the back sleeves, the middle sleeves and intersections of the back and middle sleeves; the wings in the triple longitudinal structures are connected with the body; the connection of the body with the wings is provided with three mutually-split longitudinal intersections. Mesh size of the sac is smallest; the meshes enlarge gradually from back to front of the body; the mesh size of first segments of the wings, the cover and the body are largest. The net for sampling nekton in complex terrain waters has the advantages that the triple longitudinal structures help relieve excessively-concentrated stress of the connection of the body with the wings, the net can be stressed more evenly, and the net can adapt to complex variable terrains conveniently; escaping of organisms is prevented, and errors in scientific research are eliminated; line area of the net is reduced by taking comprehensive measures, and drag resistance is decreased while the performance is ensured.
Description
Technical field
The invention belongs to single ship has wing list capsule trawlnet type of technology field, particularly relates to a kind of complex-terrain marine site necton sampling netting gear and method for weaving thereof.
Background technology
Marine fishery resources is not only the material base of fishing for industry development, is again marine ecosystems important composition key element simultaneously, and necton (comprising fish, shrimp crab class, siphonopods etc.) is the of paramount importance part of marine fishery resources.For a long time, fishery scientific research institution of China is dynamic for understanding marine nectons Quantity, grasp change in resources, conventionally adopts trawlnet towing method to gather biological sample, and material is carried out relevant research work based on this.
Coastal region, the Huanghai Sea middle and south has wide radiation dune ridge group to distribute, there is shoal area, marginal zone, shoal, 4 typical sea-floor relief geomorphic features of Sha Cao district and shallow water area, water is shallow and depth of water luffing is large, these complex-terrain geomorphic elements being interspersed in specified sea areas, unique ecological functions are given, become little yellow croaker, butterfish, important spawning ground and the feeding ground of the economic kind such as swimming crab, spatial and temporal distributions and Changing Pattern thereof to marine fishery resources play dominating role, supplementing of marine fishery resources also produced to material impact, the nekton resource investigation research in this region is an important basic research work.Some important fisheries waters of China coast also have analogue, and as numerous nearly islands and reefs regions, its topography and geomorphology is also comparatively complicated, exists same technical need.
To biological sampling, work has brought a series of unthinkable puzzlements to the changeable topography and geomorphology of underwater complex.Based on the particularity of this regional environment condition, make scientific research result accurately reflect the truth of nekton resource in region, must, according to unique environments condition and the living resources feature in the complex-terrain landforms marine sites such as radiation dune ridge group, carry out rational design to the Trawl gear of collected specimens.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of complex-terrain marine site necton sampling netting gear and method for weaving thereof.By unique structural design, reduce to misfit because of the biological formation of sample and natural marine site the scientific research deviation of bringing, reduce the biology probability of running away, be convenient to tackle topography and geomorphology complicated and changeable, reduce etting line area, reduce towrope resistance, the vertical raw structure in three roads is conducive to clear up the stress that too concentrate wing and body junction, makes etting stressed more even.
The technical solution adopted for the present invention to solve the technical problems is: necton sampling netting gear in a kind of complex-terrain marine site is provided, comprise etting, described etting comprises the wing, square, body and the net capsule that join successively, back of the body sleeve, abdomen sleeve and the back of the body abdomen sleeve intersection of described wing respectively have vertical raw accrue structure together, three roads are indulged life and are roughly evenly arranged along wing, with the vertical raw wing in three roads and anterior three the vertical raw joints that are separated from each other of rear formation that are connected of body; Its rear portion of described body is connected with net capsule; The size of mesh of described etting becomes greatly to wing gradually from net capsule, body, mesh of cod-end size minimum, and body from back to front mesh becomes greatly gradually, wing, square, body first paragraph size of mesh maximum.
Described etting adopts the polythene material braiding large with seawater aberration to form, and size of mesh is 150-300 millimeter.
Described wing is no more than 60 meters to the total length maximum of net capsule, and the net gap perimeter of netting gear is 125 meters.
Described body is the taper shape of outer contour evagination after launching.
A method for weaving for complex-terrain marine site necton sampling netting gear, comprises the following steps:
(a) braiding wing, wing back of the body sleeve, abdomen sleeve and back of the body abdomen sleeve intersection respectively have vertical raw accrue structure together, after being connected with body with the wing of the vertical life in three roads, have three vertical raw joints that are separated from each other;
(b) braiding body, described body adopts that micro-evagination is linear to be weaved, when braiding, adopt successively three kinds of form control bodies such as " reducing size of mesh+all order numbers increases ", " reducing size of mesh+all order numbers constant ", " reducing size of mesh+all order numbers reduces " linear, micro-evagination is linear mainly to be realized to the transitional link of " all order numbers reduce " by " all order numbers are constant ";
(c) mesh grid capsule, the size of mesh of the net capsule weaving is controlled at 20 millimeters.
Vertical raw accrue structure in described step (a) is for carrying out longitudinal accrue in braiding time-divisions three road, and weaving mode is " time 3 pairs of holes, 62 pairs of hole+12 " accrue mode.
In described step (b), etting selects netting twine specification back to be narrower than the etting position of belly, is positioned at the etting of maximum size of mesh, comprises wing, square, body first paragraph.
Described in described step (c), net capsule (3) size of mesh is less than or equal to 20 millimeters.
beneficial effect
The invention has the advantages that, reduce to misfit because of the biological formation of sample and natural marine site the scientific research deviation of bringing, reduce the biology probability of running away, be convenient to tackle topography and geomorphology complicated and changeable, reduce etting line area, reduce towrope resistance, the vertical raw structure in three roads is conducive to clear up the stress that too concentrate wing and body junction, makes etting stressed more even.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the vertical raw structural representations in the present invention 3 places.
Fig. 3 is the vertical raw structure braiding enlarged diagrams in the present invention 3 places.
In figure: 1, wing; 2, body; 3, net capsule; 4, mesh; 5, accrue.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment are only not used in and limit the scope of the invention for the present invention is described.In addition should be understood that those skilled in the art can make various changes or modifications the present invention after having read the content of the present invention's instruction, these equivalent form of values fall within the application's appended claims limited range equally.
As shown in Figures 1 to 3, a kind of complex-terrain marine site necton sampling netting gear, described etting is by wing 1, square, body 2 and net capsule 3 form, the back of the body sleeve of described wing 1, abdomen sleeve and back of the body abdomen sleeve intersection respectively have vertical raw accrue structure together, the vertical life in three roads is roughly evenly arranged along wing 1 peripheral direction, after being connected with body 2 is anterior with the vertical raw wing 1 in three roads, form three vertical raw joints that are separated from each other, described body 2 rear portions are connected with net capsule 3, the size of mesh of described etting is from net capsule 3, body 2 becomes large gradually to wing 1, net capsule 3 size of mesh minimums, body 2 from back to front mesh becomes large gradually, wing 1, square, body 2 first paragraph size of mesh maximums.The vertical raw structure in three roads is completed by hand woven, the vertical raw starting point of braiding is at body first paragraph, three adjacent orders of starting point are counted 20 order left and right, interval, and to guarantee area of stress concentration separately, the vertical raw accrue rule according to identical in three roads is carried out (as shown in Figure 2 and Figure 3).A complete etting can divide three parts to weave, and the one, body first paragraph (being maximum mesh part in body, measure-alike with wing) takes up one's knitting, until wing end finishes, the vertical raw design feature in three roads just embodies at this position; The 2nd, the braiding of body, can start to carry out from front to back from second segment body, order is large, play order number, whole order number, the number of looking as far as one's eyes can see, with wire gauge lattice, color etc. according to the parameter list data execution providing, while considering being connected of this part and body first paragraph and net capsule when braiding, increase by half object situation, therefore second segment and final stage are than the few joint (i.e. half mesh) of the parameter list providing; The 3rd, net capsule part.
In the time of braiding body and net capsule, carry out according to following braiding parameter:
Claims (8)
1. a complex-terrain marine site necton sampling netting gear, comprise etting, described etting comprises the wing (1), square, body (2) and the net capsule (3) that join successively, it is characterized in that: back of the body sleeve, abdomen sleeve and the back of the body abdomen sleeve intersection of described wing (1) respectively have vertical raw accrue structure together, three roads are indulged life and are roughly evenly arranged along wing (1), with the vertical raw wing (1) in three roads and anterior three the vertical raw joints that are separated from each other of rear formation that are connected of body (2); Its rear portion of described body (2) is connected with net capsule (3); The size of mesh of described etting becomes greatly to wing (1) gradually from net capsule (3), body (2), net capsule (3) size of mesh minimum, and body (2) from back to front mesh becomes greatly gradually, wing (1), square, body (2) first paragraph size of mesh maximum.
2. a kind of complex-terrain according to claim 1 marine site necton sampling netting gear, is characterized in that, described etting adopts the polythene material braiding large with seawater aberration to form, and size of mesh is 150-300 millimeter.
3. a kind of complex-terrain according to claim 1 marine site necton sampling netting gear, is characterized in that, described wing (1) is no more than 60 meters to the total length maximum of net capsule (3), and the net gap perimeter of netting gear is 125 meters.
4. a kind of complex-terrain according to claim 1 marine site necton sampling netting gear, is characterized in that, described body (2) is the taper shape of outer contour evagination after launching.
5. the method for weaving of a kind of complex-terrain according to claim 1 marine site necton sampling netting gear, is characterized in that, comprises the following steps:
(a) braiding wing (1), wing (1) back of the body sleeve, abdomen sleeve and back of the body abdomen sleeve intersection respectively have vertical raw accrue structure together, after being connected with body (2) with the wing (1) of the vertical life in three roads, have three vertical raw joints that are separated from each other;
(b) braiding body (2), described body (2) adopts that micro-evagination is linear to be weaved, when braiding, adopt successively three kinds of form control bodies such as " reducing size of mesh+all order numbers increases ", " reducing size of mesh+all order numbers constant ", " reducing size of mesh+all order numbers reduces " linear, micro-evagination is linear mainly to be realized to the transitional link of " all order numbers reduce " by " all order numbers are constant ";
(c) mesh grid capsule (3), the size of mesh of the net capsule (3) weaving is controlled at 20 millimeters.
6. the method for weaving of a kind of complex-terrain according to claim 5 marine site necton sampling netting gear, it is characterized in that, vertical raw accrue structure in described step (a) is for carrying out longitudinal accrue in braiding time-divisions three road, and weaving mode is " time 3 pairs of holes, 62 pairs of hole+12 " accrue mode.
7. the method for weaving of a kind of complex-terrain according to claim 5 marine site necton sampling netting gear, it is characterized in that, in described step (b), etting selects netting twine specification back to be narrower than the etting position of belly, be positioned at the etting of maximum size of mesh, comprise wing, square, body first paragraph.
8. the method for weaving of a kind of complex-terrain according to claim 5 marine site necton sampling netting gear, is characterized in that, described in described step (c), net capsule (3) size of mesh is less than or equal to 20 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410137186.5A CN103891682B (en) | 2014-04-04 | 2014-04-04 | The method for weaving of a kind of complicated landform marine site necton sampling netting gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410137186.5A CN103891682B (en) | 2014-04-04 | 2014-04-04 | The method for weaving of a kind of complicated landform marine site necton sampling netting gear |
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| Publication Number | Publication Date |
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| CN103891682A true CN103891682A (en) | 2014-07-02 |
| CN103891682B CN103891682B (en) | 2015-09-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410137186.5A Expired - Fee Related CN103891682B (en) | 2014-04-04 | 2014-04-04 | The method for weaving of a kind of complicated landform marine site necton sampling netting gear |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2071571A5 (en) * | 1969-12-19 | 1971-09-17 | Guezala Larequi Francisc | |
| GB2222752A (en) * | 1988-05-25 | 1990-03-21 | John Alexander Munro | Fishing trawl |
| CN2072328U (en) * | 1989-11-04 | 1991-03-06 | 辽宁省大连海洋渔业总公司 | Large-mesh trawlnet |
| CN2090160U (en) * | 1991-05-03 | 1991-12-11 | 威海网具厂 | Superficial drawn net |
| CN1200648A (en) * | 1995-10-13 | 1998-12-02 | 马特拉公司 | Design and method for trawl system cell |
| CN2822202Y (en) * | 2005-09-27 | 2006-10-04 | 中国水产科学研究院东海水产研究所 | Ladder net grid of bottom trawlnet |
| WO2010036381A1 (en) * | 2008-09-29 | 2010-04-01 | Hampidjan, Hf | Lower cost, higher efficiency trawl construction |
| CN203801529U (en) * | 2014-04-04 | 2014-09-03 | 江苏省海洋水产研究所 | Sampling net tool for nektons in complex topographical sea area |
-
2014
- 2014-04-04 CN CN201410137186.5A patent/CN103891682B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2071571A5 (en) * | 1969-12-19 | 1971-09-17 | Guezala Larequi Francisc | |
| GB2222752A (en) * | 1988-05-25 | 1990-03-21 | John Alexander Munro | Fishing trawl |
| CN2072328U (en) * | 1989-11-04 | 1991-03-06 | 辽宁省大连海洋渔业总公司 | Large-mesh trawlnet |
| CN2090160U (en) * | 1991-05-03 | 1991-12-11 | 威海网具厂 | Superficial drawn net |
| CN1200648A (en) * | 1995-10-13 | 1998-12-02 | 马特拉公司 | Design and method for trawl system cell |
| CN2822202Y (en) * | 2005-09-27 | 2006-10-04 | 中国水产科学研究院东海水产研究所 | Ladder net grid of bottom trawlnet |
| WO2010036381A1 (en) * | 2008-09-29 | 2010-04-01 | Hampidjan, Hf | Lower cost, higher efficiency trawl construction |
| CN203801529U (en) * | 2014-04-04 | 2014-09-03 | 江苏省海洋水产研究所 | Sampling net tool for nektons in complex topographical sea area |
Non-Patent Citations (1)
| Title |
|---|
| 杨吝: "南海拖网渔具的结构特征及发展方向", 《湛江海洋大学学报》 * |
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| CN103891682B (en) | 2015-09-23 |
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