CN104904681B - Multiwindow serial combination type jack mackerel dragging span device - Google Patents
Multiwindow serial combination type jack mackerel dragging span device Download PDFInfo
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- CN104904681B CN104904681B CN201510291987.1A CN201510291987A CN104904681B CN 104904681 B CN104904681 B CN 104904681B CN 201510291987 A CN201510291987 A CN 201510291987A CN 104904681 B CN104904681 B CN 104904681B
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- trawlnet
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K73/00—Drawn nets
- A01K73/02—Trawling nets
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- Environmental Sciences (AREA)
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- Biodiversity & Conservation Biology (AREA)
Abstract
Multiwindow serial combination type jack mackerel dragging span device, it is related to jack mackerel dragging span device, using jack mackerel trawlnet keed, jack mackerel trawlnet keed is equipped with manrope, keed waist hoop and flexible retainer ring, it is characterized in that the selective device is by scad trawlnet keed, test window, window fixes Suo Zucheng, wide 1.0m is opened up respectively at the back of the body net position placed in the middle of scad trawlnet keed front portion 1/3, high 2.0m 4 experiment windows, adjacent spacing is 1 meter before and after testing window, Suo Jinhang experiment windows are fixed with window to fix, window is tested according to Choice tests needs, tandem installs 4 kinds of size of mesh mesh sheet, experiment window top bead is respectively mounted the nylon material mesh bag that size of mesh is 50mm.The present apparatus realizes different size, the simultaneous test of structure selectivity device on the premise of ensureing that fishery science research and normal fish production are compatible.
Description
Technical field
The present invention relates to jack mackerel dragging span device.
Background technology
Since ancient times, abundant aquatic resources is considered as the inexhaustible present that the Nature is granted.
But the strong development of the growth and fishery with fishery knowledge, people start to recognize, aquatic resources be although it is reproducible,
But it is not unlimited；Assessment according to FAO to global fishery resources, global fishery resources 53% are developed completely, do not enter one
Walk the space of exploitation；28% is excessively developed, and 4% plans in decay state, it is necessary to pass through implementation recovery；Only 15% to be low or
Moderate solution, has potentiality to be exploited.To make aquatic resources lasting to the nutrition of ever-increasing world population, economic and society benefit
Ground is made contributions, nineteen ninety-five Committee on Fisheries of FAO (Food and Agriculture Organization of the United Nation) by be intended to carry out responsible fisheries and the guidance formulated
Property file " the responsible Rules of Conduct ", file especially proposes further practical develops and using tool to responsible fish for
Selective, environmentally sound fishing gear and fishing method, to keep bio-diversity, protection population structure, aquatic ecosystem
System and the quality of fish.Should be reduced as far as possible during fishing for waste, the quantity of the catch of non-targeted fish and non-fish species and right
The influence of species be related therewith or relied on it.
Herein under basis, countries in the world surround responsible Fishing technology and have carried out release separator and keed size of mesh
Select Journal of Sex Research.Set net test method(s) is normally applied during actual tests, it is interior by the keed and set net of different size of meshes
The com-parison and analysis of fishery harvesting, studies different size of meshes to mainly fishing for the Selection effect of kind, ecological friendly suitable for selection tool
Keed size of mesh and work out size of mesh administrative standard foundation be provided.In release separator use, due to more
It is installed on inside netting gear, so it is mainly used in release guard macro-organism, such as green turtle, sea lion, sea dog, biological to small individual
Releasing effect is not obvious.Traditionally to make Choice tests effect that there is scientific value, more than 3 kinds different structures need to be typically selected
Or size progress experiment could obtain reliable result of the test.And each Choice tests structure or size are both needed to independent progress
Experiment is repeated several times, the reliability of result of the test is just can determine that.After a kind of experiment is completed, scene is needed to adjust experimental rig
Change, not only labor intensity is big, and influence is normally produced and tested, and result of the test is also easily distributed by sea situation environment and living resources
Deng influence, it is unfavorable for a wide range of carry out and investigates.
The content of the invention
It is an object of the invention to provide a kind of multiwindow serial combination type jack mackerel dragging span device, fishery is being ensured
On the premise of scientific research and normal fish production are compatible, different size, the simultaneous test of structure selectivity device are realized.
Technical scheme using jack mackerel trawlnet keed , jack mackerel trawlnets keed equipped with manrope, keed waist hoop and
Flexible retainer ring, it is characterized in that the selective device fixes Suo Zucheng by scad trawlnet keed, experiment window, window, in bamboo
The back of the body net position placed in the middle of pod fish trawlnet keed front portion 1/3 is opened up before wide 1.0m, high 2.0m 4 experiment windows, experiment window respectively
Adjacent spacing is 1 meter afterwards, and Suo Jinhang experiment windows are fixed with window and are fixed, experiment window is according to Choice tests needs, series connection
Formula installs 4 kinds of size of mesh mesh sheet or installs 4 kinds of different grid spacing grids or install 4 kinds of different grid distance grids and different nets
Mesh size mesh sheet is combined, then is respectively mounted the nylon material mesh bag that size of mesh is 50mm on experiment window top, for collecting
The fishery harvesting type and quantity for selecting to escape by mesh, are that size of mesh or grid distance selection Journal of Sex Research provide foundation.
The present invention due to opening up wide 1.0m, high 2.0m 4 selectivity respectively at anterior 1/3 position of scad trawlnet keed
Window is tested, experiment window needs tandem to install 4 kinds of size of mesh mesh sheet or 4 kinds of different grid spacing grid according to Choice tests
The different grid distance grids of lattice or 4 kinds and the combination of different size of mesh mesh sheet, realize different size, structure selectivity device it is same
Step experiment, can effectively save code test try net sub-quantity 3/4, only with 1/4 time of conventional method can complete experiment
Task, can save substantial amounts of test period, improve Choice tests efficiency；It can avoid because of resources such as output per net and catch structures
The sampling difference that cause of fluctuation is produced, realizes the synchronism and uniformity of result of the test, improves comparativity and accuracy；Utilize bamboo
Pod fish trawlnet keed design feature, anterior 1/3 position of selection keed enters escape activity before trawlnet keed positioned at fishery harvesting is fished for
Main region, is conducive to the collection and analysis of Choice tests data to judge；Experimental rig installation position during harvesting only
The effect that guiding fishery harvesting object enters bottom keed is undertaken, storage and the harvesting of catches is not undertaken, therefore, experiment window is not
The distortion of the catches squeeze-out phenomenon that generation is fished for because rising and result of the test can be produced, is conducive to the reliability of result of the test.Pin
Big to scad trawlnet netting gear fishing gear scale, its network interface maximum size of mesh is up to m more than 20, and network interface tenses girth up to 1400-
1600m, netting gear total length 500m, keed length 50m, single net time fishery harvesting yield is up to 50-100t, and keed part is respectively mounted 4
Choice tests window is planted, on the premise of ensureing that fishery science research and normal fish production are compatible, is realized to fishing for
During different choice experimental rig release juvenile fish and non-targeted fish for the synchronous acquisition of kind, pass through the analysis of gathered data
Research, obtains most suitable keed structure and size based on ecological safety, reaches ecology, takes responsibility and fish for purpose, is fishery resources
Sustainable use provide technical guarantee.
Brief description of the drawings
What Fig. 1 was represented is scad dragging span apparatus structure schematic diagram.
What Fig. 2 was represented is scad dragging span device expanded schematic diagram.
Embodiment
Multiwindow serial combination type scad dragging span device (referring to accompanying drawing) is by scad trawlnet keed 1, experiment
Window 2, window positioning rope 3 are constituted, and using scad trawlnet keed as 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, is compiled by a diameter of 10mm polyethylene
Weaving and knitting is formed, and T-meshes is 280 mesh, and N-meshes is 480 mesh；Experiment window 2 is arranged on 1 preceding 30 meter of back of the body of keed etting
Position placed in the middle is netted, is designed by horizontal sheepshank with guiding principle coefficient 0.4, each window width is 1m, is highly 2m, with diameter 16mm ropes
Rope 5 is positioned as window, vertical and horizontal positioning is carried out；, experiment window is according to Choice tests needs, 4 kinds of tandem installation
Size of mesh mesh sheet installs 4 kinds of different grid spacing grids or installs different grid distance grids and different size of mesh mesh sheet groups
Close, such as the selection for 4 kinds of specifications that size of mesh is 90mm, 100mm, 110mm and 120mm is respectively mounted in 4 experiment windows
Property experiment mesh sheet, its width mesh/height mesh number is respectively：28/24th, 25/22,23/20 and 21/18 mesh；It is respectively mounted between grid
Away from 4 kinds of experiment grids for 2.5,3,3.5 and 4mm, grille is spacing to 2.5,3,3.5 respectively by diameter 16mm nylon rope
With 4mm spacing；It is respectively mounted that size of mesh is 90mm, 100mm, 110mm and 120mm and grid spacing is 2.5,3,3.5 and 4mm
Any combinations of 4 kinds of different grid distance grids and different size of mesh mesh sheet, then on experiment window top, it is respectively mounted mesh
Size is 50mm mesh bag, for collecting the fishery harvesting type and quantity for discharging or escaping by experimental rig, is optimal selection dress
The parameter study put provides foundation.
The adjacent cutting edge of scad trawlnet keed etting is respectively carried along longitudinal mesh parallel blind stitching from top to bottom, each cutting edge
Sutured for 3 mesh for joining edge, play the purpose for strengthening joining edge intensity；Pressed respectively at interval of 70 mesh along joining edge toward its 2 side
Proportioning device keed manrope 4 with guiding principle hanging ratio 0.95, keed manrope is restricted for diameter 42mm enlightening Nima (the strong PE of superelevation), keed
The rope sling of 1 300mm length is respectively stayed at the end of manrope 2, is connected for closing up to restrict with scad trawlnet etting net muscle and keed；In scad
Trawlnet keed rear portion, is respectively mounted keed waist hoop 5 (horizontal manrope), for preventing keed extruding explosion during fishery harvesting is lifted by crane,
Keed waist hoop is the strand of diameter 42mm polypropylene 8, and keed waist hoop spacing is 1.2m；Keed waist hoop is placed in outside etting, uses diameter
Keed waist hoop is limited in keed corresponding site by the flexible retainer ring 6 that 10mm enlightening Nima ropes are woven into, using it in hauling
It can both avoid contacting with the hard of keed etting in journey, protection etting can be played a part of again and extruded stress by catches.
Claims (5)
1. multiwindow serial combination type jack mackerel dragging span device, using jack mackerel trawlnet keed , jack mackerel trawlnet keeds
Equipped with manrope, keed waist hoop and flexible retainer ring, it is characterized in that the selective device by scad trawlnet keed, experiment window,
Window fixes Suo Zucheng, and wide 1.0m, 4 of high 2.0m are opened up respectively at the back of the body net position placed in the middle of scad trawlnet keed front portion 1/3
Test window, experiment window before and after adjacent spacing be 1 meter, fixed with window Suo Jinhang experiment window fix, experiment window according to
Choice tests need, and tandem installs 4 kinds of size of mesh mesh sheet, then are respectively mounted size of mesh on experiment window top and are
50mm nylon material mesh bag.
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, is formed by the braiding of a diameter of 10mm woven polyethylenes line, and T-meshes is 280 mesh, is indulged
It is 480 mesh to mesh number.
3. multiwindow serial combination type jack mackerel dragging span device according to claim 1, it is characterized in that experiment window
Mouthful according to Choice tests needs, the size of mesh that tandem installs 4 kinds of size of mesh mesh sheet be respectively 90mm, 100mm,
110mm and 120mm, its width mesh/height mesh number is respectively：28/24th, 25/22,23/20 and 21/18 mesh.
4. multiwindow serial combination type jack mackerel dragging span device, using jack mackerel trawlnet keed , jack mackerel trawlnet keeds
Equipped with manrope, keed waist hoop and flexible retainer ring, it is characterized in that selective device is by scad trawlnet keed, experiment window, window
The fixed Suo Zucheng of mouth, opens up wide 1.0m, 4 of high 2.0m try respectively at the back of the body net position placed in the middle of scad trawlnet keed front portion 1/3
Adjacent spacing is 1 meter before and after testing window, experiment window, and Suo Jinhang experiment windows are fixed with window and are fixed, experiment window is according to choosing
Selecting property tests needs, and tandem installs 4 kinds of different grid spacing grids, then is respectively mounted size of mesh in experiment window top bead
For 50mm nylon material mesh bag.
5. multiwindow serial combination type jack mackerel dragging span device, using jack mackerel trawlnet keed , jack mackerel trawlnet keeds
Equipped with manrope, keed waist hoop and flexible retainer ring, it is characterized in that selective device is by scad trawlnet keed, experiment window, window
The fixed Suo Zucheng of mouth, opens up wide 1.0m, 4 of high 2.0m try respectively at the back of the body net position placed in the middle of scad trawlnet keed front portion 1/3
Adjacent spacing is 1 meter before and after testing window, experiment window, and Suo Jinhang experiment windows are fixed with window and are fixed, experiment window is according to choosing
Selecting property tests needs, and tandem installs 4 kinds of different grid distance grids and the combination of different size of mesh mesh sheet, then in experiment window
Top bead is respectively mounted the nylon material mesh bag that size of mesh is 50mm.
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 |
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| Publication Number | Publication Date |
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| CN104904681A CN104904681A (en) | 2015-09-16 |
| CN104904681B true CN104904681B (en) | 2017-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510291987.1A Active CN104904681B (en) | 2015-06-01 | 2015-06-01 | Multiwindow serial combination type jack mackerel dragging span device |
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Family Cites Families (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 |
| NO173162C (en) * | 1991-04-17 | 1993-11-10 | Selfi As | DEVICE FOR FISHING TREES |
| CA2284570A1 (en) * | 1996-12-09 | 1998-06-18 | Ex-It Ehf. | 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 |
| GB9926195D0 (en) * | 1999-11-05 | 2000-01-12 | Johnson Ivor G | 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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