CN103548783B - A kind of device and method initiatively stimulating juvenile fish to escape - Google Patents
A kind of device and method initiatively stimulating juvenile fish to escape Download PDFInfo
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- CN103548783B CN103548783B CN201310504326.3A CN201310504326A CN103548783B CN 103548783 B CN103548783 B CN 103548783B CN 201310504326 A CN201310504326 A CN 201310504326A CN 103548783 B CN103548783 B CN 103548783B
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- juvenile fish
- fake
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- stimulating
- luminous annulus
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Abstract
The present invention relates to a kind of device and method initiatively stimulating juvenile fish to escape.Can be applicable to trawlnet, throw the net on a class pouch type fishing gear.The present invention includes the cylinder mesh capsule be made up of front fake, Criny, fake, square mesh section, rear fake, mesh sheet, and be connected on body and form whole trawlnet, it is characterized in that it also comprises the luminous annulus be arranged in the middle part of net capsule, and have four fixing holes at luminous annulus inner circle periphery, fixing hole on this luminous annulus connects fake via four bar ropes, and the horizontal range of fake and luminous annulus is 20-30cm.Consider and drive the taper rope battle array that juvenile fish arranges again at least 3 hollow small bells and many rope compositions respectively on luminous annulus periphery further.Obviously, the present invention can initiatively stimulate juvenile fish to flee from trawlnet, and reach the object of protection juvenile fish resource, and structure is simple, make easily, Master Cost is low.
Description
Technical field
The invention belongs to a kind of fishing gear device, be specifically related to a kind of device and method initiatively stimulating juvenile fish to escape.
Background technology
Trawlnet is a kind of filter fishing gear of movement, relies on fishing boat power towing pouch shape fishing gear, in the waters of its process by the trawl networking by force of fish, shrimp, crab, shellfish or mollusk, reaches the object of fishing.At present, trawling occupies an important position in China's Marine Fishing Industry, and its output accounts in the total amount of fishing in ocean 49%, about has more than 610 ten thousand tons every year.Current, the greatest problem of trawl-net fishing is the double juvenile fish catching a large amount of economic fishs in its catches, destroys fish population structure, has had a strong impact on the sustainable development of fishery resources.Shrimp fishery is much dragged all over the world, some technical measures and control measures are carried out to reduce the double quantity of catching kind of trawlnet, the most conventional is change trawlnet partial structurtes, as the release apparatus using square mesh in net capsule front end, use separate gate in net capsule front end, be separated the fish such as mesh sheet, thus increase the chance that fish escape, reduce and doublely catch catch.Existingly at present belong to passivity separator, require that netting gear assembly technology is high on the one hand, easily have influence on net scrotiform shape during application, thus affect performance and the effect of netting gear itself and selectivity device; On the other hand juvenile fish can produce with above-mentioned separator and extrude and come to harm, even if its survival rate of escaping out is low.Therefore according to Fish behavior characteristic, exploitation stimulates juvenile fish to make it initiatively escape, the trawlnet improving fish escape effect and survival rate to the protection of fishery resources and sustainable development significant.
Summary of the invention
The object of this invention is to provide a kind of trawlnet initiatively stimulating juvenile fish to escape and preparation method thereof; overcome the deficiency of prior art, so that the behavior of juvenile fish in net capsule initiatively can be stimulated, promote that it initiatively escapes from net capsule; thus the infringement reduced juvenile fish resource, protect fishery resourses better.
The present invention is the improvement to existing trawlnet, in net capsule, be easily subject to light according to juvenile fish, stress the reaction of behavior researching and analysing of the stimulation of sound and current, specially related device juvenile fish being carried out to initiative stimulation is set in the net capsule of trawlnet: specifically comprising is in the structure of the net capsule of trawlnet, in the middle part of net capsule, be provided with a luminous annulus respectively, can sonorific multiple hollow small bell, and the rope battle array that can produce special current in dragging fished for by trawlnet, carry out active to stimulate, force juvenile fish travelling outside net capsule, and the juvenile fish made it wherein is passed through square mesh section and flees from net capsule.
Therefore, the method initiatively stimulating juvenile fish to escape is: after the shoal of fish in trawlnet is subject to aggtegation through Criny, first meet the luminous annulus producing fluorescence to the meeting be arranged in the middle part of net capsule, make it juvenile fish wherein under the stimulation of light, produce violent behavior of stress moving about; Simultaneously again at least 3 hollow small bells are set on luminous annulus periphery, promote the flight behavior of juvenile fish with the sound wave of low-frequency vibration and generation further; Between luminous annulus and rear fake, the tapering arranged is relied on to be the rope battle array of 1:2-2.5 subsequently, this rope battle array forms current (as Fig. 2 direction of arrow) and the air curtain of surrounding laterally under flow action, stimulate again fish to press close to the mesh sheet of net capsule surrounding further, reach the object making it to pass through the escape of square mesh section.
Therefore; the present invention successively stimulates fish to press close to the mesh sheet of net capsule surrounding from aspects such as vision, the sense of hearing and senses of touch; thus make the small fishes such as juvenile fish can pass through the escape of square mesh section; and be unlikely and make juvenile fish be forced to take part by the shoal of fish of concentrating and be difficult to escape from net capsule, thus reach the protection object to China's fishery resources.
The method initiatively stimulating juvenile fish to escape of the present invention can be applicable to trawlnet, throws the net on a class pouch type fishing gear.
Technical scheme of the present invention: the present invention includes the cylinder mesh capsule be made up of front fake, Criny, fake, square mesh section, rear fake, mesh sheet, and be connected on body and form whole trawlnet, it is characterized in that it also comprises the luminous annulus be arranged in the middle part of net capsule, and have four fixing holes at luminous annulus inner circle periphery, fixing hole on this luminous annulus connects fake via four bar ropes, makes the horizontal range of fake and luminous annulus be 20-30cm.
Consider and drive juvenile fish further, again the hollow small bell of uniform setting at least 3 on luminous annulus periphery.
Consider and drive juvenile fish further, the circular hole again in the circumferential periphery of luminous annulus be connected many ropes composition taper rope battle arrays between rear fake, and the tapering of rope battle array is within the scope of 1:2-2.5.
Obviously, feature of the present invention initiatively to stimulate juvenile fish to flee from Cod-ends of Trawl, and reach the object of protection juvenile fish resource, and structure is simple, preparation method is easy, and Master Cost is low, can discharge juvenile fish better, retains adult fish.The method initiatively stimulating juvenile fish to escape of the present invention also can be used for throwing the net etc. on pouch type fishing gear.
Accompanying drawing explanation
Fig. 1 is general structure schematic diagram of the present invention.
Fig. 2 is net capsule structural representation of the present invention.
Fig. 3 is luminous circular ring structure schematic diagram.
Wherein 1, net capsule 2, body 3, front fake 4, Criny 5, fake 6, rope 7, luminous annulus 8, rope battle array 9, square mesh section 10, rear fake 11, bar rope 12, mesh sheet 13, hollow small bell 14, fixing hole 15, circular hole 16, fluorescent light-emitting layer.
Embodiment
As Fig. 1,2,3, the present invention includes the cylinder mesh capsule 1 be made up of front fake 3, Criny 4, fake 5, square mesh section 9, rear fake 10, mesh sheet 12, and be connected on body 2 and form whole trawlnet, it is characterized in that it also comprises the luminous annulus 7 be arranged in the middle part of net capsule 1, and have four fixing holes 14 at luminous annulus 7 inner circle periphery, fixing hole 14 on this luminous annulus 7 connects fake 5 via four bar ropes 11, and makes fake 5 be 20-30cm with the horizontal range of luminous annulus 7.
Above-mentioned luminous annulus 7 is made up of vinyon, and this luminous annulus 7 is pasted on the surface or scribbled water-fast fluorescent light-emitting layer 16.Above-mentioned fluorescent light-emitting layer 16 is halogen calcium phosphate fluoressent powders, and the strength range sending light is that 80-120 lux is best.
Luminous annulus 7 external diameter 20-30cm, internal diameter 10-15cm, thickness 0.5-1cm, the corresponding sweep net of the usual yardstick upper limit.
Consider and drive juvenile fish further, on luminous annulus 7 periphery, arrange at least 3 hollow small bells 13 again, hollow small bell 13 is made up of stainless steel, diameter 3cm, and vibration frequency is at 600 hertz, and this vibration frequency is accelerated sound wave to juvenile fish and driven reaction.
Consider and drive juvenile fish further, between circular hole 15 and the rear fake 10 of luminous annulus 7, be connected many ropes 6 again and form taper rope battle array 8.Rope battle array 8 tapering is within the scope of 1:2-2.5.
Plurality of fibers rope 6 between above-mentioned luminous annulus 7 and rear fake 10 is normally made by 12-18 root cordage, the radial dimension 8-10mm of every root cordage.
Wherein Criny 4 length 1m, diameter is all 1m mutually with net capsule 1 diameter, and Criny 4 end network interface diameter is point diameter 1/3-1/4, and diameter is all the front fake of 1m 3, fake 5, rear fake 10 structure is identical and be made up of cordage, identical with prior art.Mesh sheet 12 adopts common trawlnet to make material polyethylene netting twine, and size of mesh is determined as required.
Preparation method of the present invention is as follows:
First make body 2 and other structure of net capsule 1 front portion according to usual way, be then made into net capsule 1, then the net capsule 1 made is sutured in body 2, be namely combined into whole trawlnet.
The wherein making of net capsule 1: first make front fake 3 and Criny 4 according to usual way, then fake 3 seam before being stitched with mesh sheet 12 is woven in Criny 4 front end, then fake 5 is being set at 2m place below apart from front fake 3, is forming the leading section of net capsule 1; Again rear fake 10 is seamed in rearward end mesh sheet 12 below being formed net capsule 1; Luminous annulus 7 is made again with vinyon, and at least 3 hollow small bells 13 are set in its surrounding, the fixing hole 14 of luminous annulus 7 inner circle periphery arranges the identical bar rope 11 of four length, and is connected on fake 5 fixing, make fake 5 be 20-30cm with the horizontal range of luminous annulus 7; The making of rope battle array 8 is connecting ropes 6 on the circular hole 15 of luminous annulus 7, and the other end of rope 6 is evenly fixed on rear fake 10 and forms rope battle array 8, and rope battle array 8 tapering remains on 1:2-2.5; Finally square mesh section 9 two ends determining size of mesh are as required sewn on fake 5 and rear fake 10, namely make net capsule 1.
Embodiment 1
First make body 2 and other structure of net capsule 1 front portion according to usual way, be then made into net capsule 1, then the net capsule 1 made is sutured in body 2, be namely combined into whole trawlnet.
The wherein making of net capsule 1: first making diameter according to usual way is fake 3 and Criny 4 before 1m, Criny 4 end network interface diameter is 30cm, again fake 3 seam before being stitched with mesh sheet 12 is woven in Criny 4 front end, then be 1m fake 5 below 2m place arranges diameter apart from front fake 3, form the leading section of net capsule 1; Again the rear fake 10 of diameter 1m is seamed in rearward end mesh sheet 12 below being formed net capsule 1; Luminous annulus 7 is made again with vinyon, this luminous annulus 7 surface is for scribbling the fluorescent light-emitting layer 16 of halogen calcium phosphate fluoressent powder, and the hollow small bell 13 of 4 diameter 3cm is set in luminous annulus 7 surrounding, the fixing hole 14 of luminous annulus 7 inner circle periphery arranges the identical bar rope 11 of four length, and be connected on fake 5 fixing, make fake 5 be 25cm with the horizontal range of luminous annulus 7; The making of rope battle array 8 is the ropes 6 connecting 15 radial dimension 8mm on the circular hole 15 of luminous annulus 7, and the other end of rope 6 is evenly fixed on rear fake 10 and forms rope battle array 8, and rope battle array 8 tapering remains on 1:2; Finally square mesh section 9 two ends determining size of mesh are as required sewn on fake 5 and rear fake 10, namely make net capsule 1.
Claims (4)
1. one kind utilizes the device initiatively stimulating juvenile fish to escape to carry out the method stimulating juvenile fish to escape, the described device initiatively stimulating juvenile fish to escape comprises by front fake (3), Criny (4), fake (5), square mesh section (9), rear fake (10), the cylinder mesh capsule (1) that mesh sheet (12) is formed, and be connected to the whole trawlnet of the upper composition of body (2), it is characterized in that, this device initiatively stimulating juvenile fish to escape also comprises the luminous annulus (7) being arranged on cylinder mesh capsule (1) middle part, luminous annulus (7) periphery arranges at least 3 hollow small bells (13), and have four fixing holes (14) at luminous annulus (7) inner circle periphery, fixing hole (14) on this luminous annulus (7) connects fake (5) via four bar ropes (11), and make fake (5) be 20-30cm with the horizontal range of luminous annulus (7), circular hole (15) in circumferential periphery on luminous annulus (7) and connect the taper rope battle array (8) that many ropes (6) form between rear fake (10), and the tapering of this taper rope battle array (8) is within the scope of 1:2-2.5,
The described method utilizing the device initiatively stimulating juvenile fish to escape to carry out stimulating juvenile fish to escape is as follows: after the shoal of fish in trawlnet is subject to aggtegation through Criny (4), first meet the luminous annulus (7) producing fluorescence to the meeting being arranged on cylinder mesh capsule (1) middle part, make juvenile fish under the stimulation of fluorescence, produce violent behavior of stress moving about; Then at least 3 hollow small bells (13) on luminous annulus (7) periphery produce low-frequency vibration and sound wave, promote the flight behavior of juvenile fish further; The taper rope battle array (8) arranged between luminous annulus (7) and rear fake (10) forms current and the air curtain of surrounding laterally subsequently under flow action, stimulate again fish to press close to the mesh sheet of cylinder mesh capsule (1) surrounding further, make it to pass through square mesh section (9) and escape.
2. utilize the device initiatively stimulating juvenile fish to escape to carry out the method stimulating juvenile fish to escape as claimed in claim 1, it is characterized in that, described luminous annulus (7) front surface is pasted or is scribbled water-fast fluorescent light-emitting layer (16).
3. utilize the device initiatively stimulating juvenile fish to escape to carry out the method stimulating juvenile fish to escape as claimed in claim 2, it is characterized in that, described fluorescent light-emitting layer (16) is halogen calcium phosphate fluoressent powder layer, and the strength range that fluorescent light-emitting layer (16) sends light is 80-120 lux.
4. utilize the device initiatively stimulating juvenile fish to escape to carry out the method stimulating juvenile fish to escape as claimed in claim 1, it is characterized in that, the external diameter 20-30cm of described luminous annulus (7), internal diameter 10-15cm, thickness 0.5-1cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310504326.3A CN103548783B (en) | 2013-10-24 | 2013-10-24 | A kind of device and method initiatively stimulating juvenile fish to escape |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310504326.3A CN103548783B (en) | 2013-10-24 | 2013-10-24 | A kind of device and method initiatively stimulating juvenile fish to escape |
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| Publication Number | Publication Date |
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| CN103548783A CN103548783A (en) | 2014-02-05 |
| CN103548783B true CN103548783B (en) | 2015-11-11 |
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| CN201310504326.3A Expired - Fee Related CN103548783B (en) | 2013-10-24 | 2013-10-24 | A kind of device and method initiatively stimulating juvenile fish to escape |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105660551A (en) * | 2016-01-14 | 2016-06-15 | 中国水产科学研究院东海水产研究所 | Middle-layer trawl net and fish bag selective device |
| CN105875529B (en) * | 2016-04-22 | 2019-04-19 | 新昌县希克自动化设备有限公司 | Floated cage |
| CN106417197A (en) * | 2016-12-05 | 2017-02-22 | 上海海洋大学 | Net spreading juvenile fish release device with self-provided guiding net |
| CN108651396A (en) * | 2018-05-04 | 2018-10-16 | 佛山科学技术学院 | A kind of brook fishing cage tool |
| CN109730041B (en) * | 2019-03-10 | 2021-06-15 | 杭州林迪德瑞科技有限公司 | Intelligent trawl apparatus and method |
| CN109717157A (en) * | 2019-03-10 | 2019-05-07 | 杭州林迪德瑞科技有限公司 | Trawling gear and method |
| CN111820193B (en) * | 2020-05-26 | 2021-10-26 | 浙江海洋大学 | Layered net bag type trawl net |
| CN111642469B (en) * | 2020-06-04 | 2022-08-19 | 中国水产科学研究院东海水产研究所 | Bag-shaped net and method for acquiring escape rate of caught object from trawl mesh by using same |
| CN112205364B (en) * | 2020-09-16 | 2023-01-06 | 中国水产科学研究院东海水产研究所 | Sound wave drives fish net board |
| CN115362995A (en) * | 2022-08-24 | 2022-11-22 | 中国水产科学研究院南海水产研究所 | Net-opening net bag capable of effectively reducing proportion of juvenile fish and juvenile shrimp |
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| US4501084A (en) * | 1982-08-11 | 1985-02-26 | Kei Mori | Fishing net |
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| CN202211087U (en) * | 2011-02-22 | 2012-05-09 | 陕西科技大学 | Large power LED fishing net |
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| KR100510032B1 (en) * | 2001-12-03 | 2005-08-25 | 대한민국 | Fishing gear with escaping equipment for small fish |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3683280A (en) * | 1971-11-09 | 1972-08-08 | Electromagnetic Ind Inc | Shark repelling device including pulse generator producing electrical field in water between widely spaced electrodes |
| SU589943A1 (en) * | 1975-12-26 | 1978-01-30 | Дальневосточное Опытное Конструкторско-Технологическое Бюро "Дальтехрыбпром" | Device for preventing fish escaping from trawl |
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| CN103548783A (en) | 2014-02-05 |
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| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Sun Peng Inventor after: Huang Liuyi Inventor after: Tang Yanli Inventor after: Zhang Min Inventor before: Tang Yanli Inventor before: Huang Liuyi Inventor before: Zhang Min |
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Free format text: CORRECT: INVENTOR; FROM: TANG YANLI HUANG LIUYI ZHANG MIN TO: SUN PENG HUANG LIUYI TANG YANLI ZHANG MIN |
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| CF01 | Termination of patent right due to non-payment of annual fee |