CN104904681A - Multi-window series connection combination type trachurus murphyi trawling selectivity device - Google Patents
Multi-window series connection combination type trachurus murphyi trawling selectivity device Download PDFInfo
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- CN104904681A CN104904681A CN201510291987.1A CN201510291987A CN104904681A CN 104904681 A CN104904681 A CN 104904681A CN 201510291987 A CN201510291987 A CN 201510291987A CN 104904681 A CN104904681 A CN 104904681A
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- keed
- window
- mesh
- trawlnet
- test
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- 241001439612 Trachurus murphyi Species 0.000 title abstract 7
- 239000004677 Nylon Substances 0.000 claims abstract description 6
- 229920001778 nylon Polymers 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 5
- 238000012360 testing method Methods 0.000 claims description 63
- 241000932075 Priacanthus hamrur Species 0.000 claims description 22
- 241000418711 Trachurus symmetricus Species 0.000 claims description 16
- 239000004698 Polyethylene Substances 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 239000011324 bead Substances 0.000 claims 2
- 241000251468 Actinopterygii Species 0.000 abstract description 14
- 238000011160 research Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000001360 synchronised effect Effects 0.000 abstract description 2
- 235000019688 fish Nutrition 0.000 description 9
- 238000003306 harvesting Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000005304 joining Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 241000270607 Chelonia mydas Species 0.000 description 1
- 241000282320 Panthera leo Species 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 238000009954 braiding Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000000366 juvenile effect Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000003578 releasing effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K73/00—Drawn nets
- A01K73/02—Trawling nets
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
Abstract
The invention discloses a multi-window series connection combination type trachurus murphyi trawling selectivity device, and relates to a trachurus murphyi trawling selectivity device. A trachurus murphyi trawling fish bag is adopted, and lacing lines, fish bag waist hoops and flexible retaining rings are mounted on the trachurus murphyi trawling fish bag. The selectivity device is characterized by consisting of the trachurus murphyi trawling fish bag, experiment windows and window fixing ropes; four experiment windows with the widths of 1.0 m and the heights of 2.0 m are respectively arranged at the middle part of a 1/3 back mesh in the front of the trachurus murphyi trawling fish bag; the distance between the front experiment window and the next experiment window is 1 m; experiment window fixation is performed by using the window fixing ropes; meshes with four mesh sizes are mounted on the experiment windows in a series connection manner according to selectivity experiment requirements; nylon material mesh bags with the mesh sizes of 50 mm are mounted on the upper edges of the experiment windows respectively. The device realizes synchronous experiments of selectivity devices with different specifications and structures under the precondition of guaranteeing mutual consistency of fishery science research and normal fishery production.
Description
Technical field
The present invention relates to jack mackerel dragging span device.
Background technology
Since ancient times, abundant aquatic resources is considered to the inexhaustible present that the Nature is granted.But along with the growth of fishery knowledge and the strong development of fishery, people start to recognize, although aquatic resources is reproducible, are not unlimited; According to the assessment of FAO to global fishery resources, global fishery resources 53% are developed completely, the space of not exploitation further; 28% is excessively developed, and 4% in decay state, needs by implementing recovery plan; Only 15% is low or moderate solution, tool potentiality to be exploited.For making aquatic resources, the nutrition of ever-increasing world population, economic and society benefit are made contributions enduringly; nineteen ninety-five Committee on Fisheries of FAO (Food and Agriculture Organization of the United Nation) pass through be intended to carry out responsible fisheries and the directive document " responsible the Rules of Conduct " formulated; file proposes further practical to develop and application has selectivity, environmentally sound fishing gear and fishing method to responsible fishing for especially; to keep bio-diversity, protection population structure, aquatic ecosystem are unified the quality of fish.Fish in process should cut the waste as far as possible, the quantity of the catch of non-targeted fish and non-fish species and on the impact of being related with it or on the species that it relies on.
Under this basis, release separator and the research of keed size of mesh selectivity have been carried out around responsible Fishing technology in countries in the world.General application cover net test method(s) in actual tests process, net the com-parison and analysis of interior fishery harvesting by the keed of different size of mesh and cover, study different size of mesh to the Selection effect of mainly fishing for kind, provide foundation for selecting the ecological friendly suitable keed size of mesh of tool and working out size of mesh administrative standard.In release separator use, be installed on netting gear inside due to more, so be mainly used in release guard macro-organism, as green turtle, sea lion, sea dog etc., not obvious to little individual biological releasing effect.Traditionally for making Choice tests effect have scientific value, more than 3 kinds different structures or size generally need be selected to carry out test and could obtain reliable result of the test.And each Choice tests structure or size all need to carry out separately repeatedly repeated test, the reliability of result of the test could be determined.After completing a kind of test, need on-the-spot exchange experimental rig, not only labour intensity is large, and affects normal production and test, and result of the test is also subject to the impact such as sea situation environment and living resources distribution, is unfavorable for carrying out investigation on a large scale.
Summary of the invention
The object of this invention is to provide a kind of multiwindow serial combination type jack mackerel dragging span device, ensureing under fishery science research and the compatible prerequisite of normal fish production, realizing the simultaneous test of different size, structure selectivity device.
Technical scheme of the present invention adopts jack mackerel trawlnet keed, jack mackerel trawlnet keed is equipped with manrope, keed waist hoop and flexible retainer ring, it is characterized in that this selectivity device is by scad trawlnet keed, test window, window antilift wire forms, wide 1.0m is offered respectively at anterior 1/3 back of the body net position placed in the middle of scad trawlnet keed, 4 test windows of high 2.0m, before and after test window, adjacent spacing is 1 meter, carry out test window with window antilift wire to fix, test window is according to Choice tests needs, tandem is installed 4 kinds of size of mesh mesh sheet or is installed 4 kinds of different grid spacing grids or install 4 kinds of different grid distance grids and the combination of different size of mesh mesh sheet, on test window top, the nylon material mesh bag that size of mesh is 50mm is installed respectively again, for collecting fishery harvesting kind and the quantity of being selected escape by mesh, for size of mesh or the research of grid distance selectivity provide foundation.
The present invention is owing to offering wide 1.0m respectively at anterior 1/3 position of scad trawlnet keed, 4 Choice tests windows of high 2.0m, test window needs tandem to install 4 kinds of size of mesh mesh sheet or 4 kinds of different grid spacing grids or 4 kinds of different grid distance grids and the combination of different size of mesh mesh sheet according to Choice tests, realize different size, the simultaneous test of structure selectivity device, effectively can save code test try net sub-quantity 3/4, only test mission can be completed with 1/4 time of conventional method, a large amount of test periods can be saved, improve Choice tests efficiency, the sampling difference because the resource fluctuations such as output per net and catch structure reason produces can be avoided, realize synchronism and the uniformity of result of the test, improve comparativity and accuracy, utilize scad trawlnet keed design feature, select anterior 1/3 position of keed, be positioned at and fish for the main region that fishery harvesting enters escape activity before trawlnet keed, the collection and analyzing being conducive to Choice tests data judges, the effect guiding fishery harvesting object to enter bottom keed is only born in experimental rig installation position in harvesting process, do not bear storage and the harvesting of catches, therefore, test window can not produce fishes for the catches squeeze-out phenomenon of generation and the distortion of result of the test because rising, and is conducive to the reliability of result of the test.Large for scad trawlnet netting gear fishing gear scale, the maximum size of mesh of its network interface reaches m more than 20, network interface tension girth can reach 1400-1600m, netting gear total length 500m, keed length 50m, single net time fishery harvesting output can reach 50-100t, keed part installs 4 kinds of Choice tests windows respectively, ensureing under fishery science research and the compatible prerequisite of normal fish production, realize fishing for the synchronous acquisition of kind to different choice experimental rig release juvenile fish and non-targeted in the process of fishing for, by the analysis and research of image data, obtain the suitableeest keed structure based on ecological safety and size, reach ecological, take responsibility and fish for object, for the sustainable use of fishery resources provides technical guarantee.
Accompanying drawing explanation
What Fig. 1 represented is scad dragging span apparatus structure schematic diagram.
What Fig. 2 represented is that scad dragging span device launches schematic diagram.
Embodiment
Multiwindow serial combination type scad dragging span device (see accompanying drawing) is made up of scad trawlnet keed 1, test window 2, window position rope 3, with scad trawlnet keed for platform, scad trawlnet keed is equipped with manrope 4, keed waist hoop (horizontal manrope) 5 and flexible retainer ring 6; Scad trawlnet keed etting size of mesh 100mm, be that the braiding of 10mm woven polyethylene line forms by diameter, T-meshes is 280 orders, and N-meshes is 480 orders; Test window 2 is arranged on the front 30 meters of back of the body net positions placed in the middle of keed etting 1, and join guiding principle coefficient 0.4 by horizontal sheepshank and design, each window width is 1m, is highly 2m, with diameter 16mm rope as window position rope 5, carries out vertical and horizontal location; Test window is according to Choice tests needs, tandem is installed 4 kinds of size of mesh mesh sheet or is installed 4 kinds of different grid spacing grids or install different grid distance grid and the combination of different size of mesh mesh sheet, such as, install the Choice tests mesh sheet that size of mesh is 4 kinds of specifications of 90mm, 100mm, 110mm and 120mm respectively in 4 test windows, its width mesh/height order number is respectively: 28/24,25/22,23/20 and 21/18 order; Install 4 kinds of test grids that grid spacing is 2.5,3,3.5 and 4mm respectively, grille is spacing to 2.5,3,3.5 and 4mm spacing respectively by the nylon rope of diameter 16mm; To install size of mesh be respectively 90mm, 100mm, 110mm and 120mm from grid spacing is 2.5,3,3.5 and 4 kinds of different grid distance grids of 4mm and any combination of different size of mesh mesh sheet, again on test window top, installing size of mesh is respectively the mesh bag of 50mm, for collecting the fishery harvesting kind and quantity that to be discharged by experimental rig or escape, for the parameter study of optimal selection device provides foundation.
The adjacent shear cutting edge longitudinally order parallel blind stitching from top to bottom of scad trawlnet keed etting, each cutting edge respectively provides 3 orders to sew up for joining edge, plays the object strengthening joining edge intensity; Along joining edge toward its 2 side at interval of 70 orders respectively by the proportioning device keed manrope 4 of joining guiding principle hanging ratio 0.95, keed manrope is diameter 42mm enlightening Nima (the strong PE of superelevation) rope, the rope sling that keed manrope 2 end respectively stays 1 300mm long, is connected for closing up to restrict with scad trawlnet etting net muscle and keed; At scad trawlnet keed rear portion, install keed waist hoop 5 (horizontal manrope) respectively, for preventing keed extruding explosion in fishery harvesting lifting process, keed waist hoop is diameter 42mm polypropylene 8 strand, and keed waist hoop spacing is 1.2m; Keed waist hoop is placed in etting outside; with the flexible retainer ring 6 that diameter 10mm enlightening Nima rope is woven into, keed waist hoop is limited in keed corresponding site; use it both can avoid contacting with the hard of keed etting in a network process, protection etting can be played again and extrude stressed effect by catches.
Claims (5)
1. multiwindow serial combination type jack mackerel dragging span device, adopt jack mackerel trawlnet keed, jack mackerel trawlnet keed is equipped with manrope, keed waist hoop and flexible retainer ring, it is characterized in that this selectivity device is by scad trawlnet keed, test window, window antilift wire forms, wide 1.0m is offered respectively at anterior 1/3 back of the body net position placed in the middle of scad trawlnet keed, 4 test windows of high 2.0m, before and after test window, adjacent spacing is 1 meter, carry out test window with window antilift wire to fix, test window is according to Choice tests needs, tandem installs 4 kinds of size of mesh mesh sheet, on test window top, the nylon material mesh bag that size of mesh is 50mm is installed respectively again.
2. multiwindow serial combination type jack mackerel dragging span device according to claim 1, it is characterized in that scad trawlnet keed etting size of mesh 100mm, by diameter be 10mm woven polyethylene line weave form, T-meshes is 280 orders, and N-meshes is 480 orders.
3. multiwindow serial combination type jack mackerel dragging span device according to claim 1, it is characterized in that test window is according to Choice tests needs, the size of mesh that tandem installs 4 kinds of size of mesh mesh sheet is respectively 90mm, 100mm, 110mm and 120mm, and its width mesh/height order number is respectively: 28/24,25/22,23/20 and 21/18 order.
4. multiwindow serial combination type jack mackerel dragging span device, adopt jack mackerel trawlnet keed, jack mackerel trawlnet keed is equipped with manrope, keed waist hoop and flexible retainer ring, it is characterized in that selectivity device is by scad trawlnet keed, test window, window antilift wire forms, wide 1.0m is offered respectively at anterior 1/3 back of the body net position placed in the middle of scad trawlnet keed, 4 test windows of high 2.0m, before and after test window, adjacent spacing is 1 meter, carry out test window with window antilift wire to fix, test window is according to Choice tests needs, tandem installs 4 kinds of different grid spacing grids, at test window top bead, the nylon material mesh bag that size of mesh is 50mm is installed respectively again.
5. multiwindow serial combination type jack mackerel dragging span device, adopt jack mackerel trawlnet keed, jack mackerel trawlnet keed is equipped with manrope, keed waist hoop and flexible retainer ring, it is characterized in that selectivity device is by scad trawlnet keed, test window, window antilift wire forms, wide 1.0m is offered respectively at anterior 1/3 back of the body net position placed in the middle of scad trawlnet keed, 4 test windows of high 2.0m, before and after test window, adjacent spacing is 1 meter, carry out test window with window antilift wire to fix, test window is according to Choice tests needs, tandem installs 4 kinds of different grid distance grids and the combination of different size of mesh mesh sheet, at test window top bead, the nylon material mesh bag that size of mesh is 50mm is installed respectively again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510291987.1A CN104904681B (en) | 2015-06-01 | 2015-06-01 | Multiwindow serial combination type jack mackerel dragging span device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510291987.1A CN104904681B (en) | 2015-06-01 | 2015-06-01 | Multiwindow serial combination type jack mackerel dragging span device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104904681A true CN104904681A (en) | 2015-09-16 |
| CN104904681B CN104904681B (en) | 2017-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510291987.1A Active CN104904681B (en) | 2015-06-01 | 2015-06-01 | Multiwindow serial combination type jack mackerel dragging span device |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4043068A (en) * | 1976-04-20 | 1977-08-23 | Savoie Forest J | Escape hatch for fish net |
| WO1992017999A1 (en) * | 1991-04-17 | 1992-10-29 | Selfi As | Device for trawl |
| WO1998025452A1 (en) * | 1996-12-09 | 1998-06-18 | Nordurnet Hf | Device for sorting out marine species in fishing trawl |
| RU2171573C2 (en) * | 1999-03-01 | 2001-08-10 | Полярный научно-исследовательский институт морского рыбного хозяйства и океанографии им. Н.М. Книповича | Sorting system for trawl |
| CN1387400A (en) * | 1999-11-05 | 2002-12-25 | 艾弗·吉尔伯特·约翰逊 | Fish grading device |
| CN201243557Y (en) * | 2008-07-21 | 2009-05-27 | 中国水产科学研究院东海水产研究所 | Symmetrical type folding trawlnet selectivity device |
| CN201830776U (en) * | 2010-09-02 | 2011-05-18 | 中国水产科学研究院南海水产研究所 | Fishing stow net sack |
| CN203646348U (en) * | 2014-01-13 | 2014-06-18 | 上海海洋大学 | Sampling net for large-mesh antarctic krill dragnet |
-
2015
- 2015-06-01 CN CN201510291987.1A patent/CN104904681B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4043068A (en) * | 1976-04-20 | 1977-08-23 | Savoie Forest J | Escape hatch for fish net |
| WO1992017999A1 (en) * | 1991-04-17 | 1992-10-29 | Selfi As | Device for trawl |
| WO1998025452A1 (en) * | 1996-12-09 | 1998-06-18 | Nordurnet Hf | Device for sorting out marine species in fishing trawl |
| RU2171573C2 (en) * | 1999-03-01 | 2001-08-10 | Полярный научно-исследовательский институт морского рыбного хозяйства и океанографии им. Н.М. Книповича | Sorting system for trawl |
| CN1387400A (en) * | 1999-11-05 | 2002-12-25 | 艾弗·吉尔伯特·约翰逊 | Fish grading device |
| CN201243557Y (en) * | 2008-07-21 | 2009-05-27 | 中国水产科学研究院东海水产研究所 | Symmetrical type folding trawlnet selectivity device |
| CN201830776U (en) * | 2010-09-02 | 2011-05-18 | 中国水产科学研究院南海水产研究所 | Fishing stow net sack |
| CN203646348U (en) * | 2014-01-13 | 2014-06-18 | 上海海洋大学 | Sampling net for large-mesh antarctic krill dragnet |
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| Publication number | Publication date |
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| CN104904681B (en) | 2017-07-21 |
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