CN104137813B - A kind of fry collecting method of fry collecting device and applicable THE LOWER YANGTZE VALLEY tideway - Google Patents
A kind of fry collecting method of fry collecting device and applicable THE LOWER YANGTZE VALLEY tideway Download PDFInfo
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- CN104137813B CN104137813B CN201410342820.9A CN201410342820A CN104137813B CN 104137813 B CN104137813 B CN 104137813B CN 201410342820 A CN201410342820 A CN 201410342820A CN 104137813 B CN104137813 B CN 104137813B
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Abstract
The present invention discloses a kind of fry collecting device, it is characterized in that: this device comprises fry collecting net, the collection seedling case be connected with fry collecting net and flotation gear.The present invention also disclosed a kind of fry collecting method of applicable THE LOWER YANGTZE VALLEY tideway, comprises the selection of netting gear and accessory, the selection of fry collecting net set-up site, the laying of netting gear and connection, the collection of fry and the step such as cleaning, management maintenance of netting gear.Netting gear of the present invention and connected mode simple to operate, practical, the collecting efficiency of the larger rivers tideway fry of water level day drop can be significantly improved.
Description
Technical field
The invention belongs to technical field of fishery, particularly relate to a kind of fry collecting method of fry collecting device and applicable THE LOWER YANGTZE VALLEY tideway.
Background technology
The enquiry based work carried out for object with the fish early life history stage is the early stage resource investigation of fish.The early stage resource investigation of fish has that sampling independence is strong, nutrition and place is comparatively concentrated, sample size is easier to ensure, and to features such as the destructiveness of resource are less.Quantity, place, the spawning ground scale of reproductive population not only can be calculated by the early stage resource investigation of fish; prediction dynamics of fish population rule; a large amount of basic informations can also be obtained, for the development and protection of Monitoring of Marine Resource Dynamic, protection of fish resources recruitment evaluation, the stock of fish provides scientific basis.Fry collecting is the important content of the early stage resource investigation of fish.The Changjiang river one be with fishermen fish with a net seedling multiplex one customization netting gear.This netting gear gathers net and collection seedling case is all fixing on the securing means with rope, and collection seedling case is the fixed cage of uncovered.Find in field investigation sampling, in the tidal river section (as river, Nantong section) that THE LOWER YANGTZE VALLEY water level day drop is larger, this traditional fry collecting net can not adapt to SEA LEVEL VARIATION, often otherwise height uphang in midair, deeply do not disappear at the bottom, do not collect what fry at all; And all fix with rope because gather net and collect seedling case, in water, the cleaning of tying-up fixing operation and netting gear is extremely inconvenient, has a strong impact on the quality and quantity of fry collecting.
Summary of the invention
The object of the invention is can not adapt to SEA LEVEL VARIATION and unhandy defect for above-mentioned netting gear, provides a kind of fry collecting method of fry collecting device and applicable THE LOWER YANGTZE VALLEY tideway.
The present invention for achieving the above object, adopts following technical scheme:
A kind of fry collecting device, is characterized in that: this device comprises fry collecting net, the collection seedling case be connected with fry collecting net and flotation gear;
Described fry collecting net is cone barrel net, and two ends are provided with hard network interface, is that 28 object nylon bolting silks are made by mesh;
Described collection seedling case is assembled by frameless net cage with cover, four dead levers and floating frame, and wherein said net cage is rectangular shape, and mesh is 28 orders; Four dead levers are arranged on net cage four vertical seamed edges, and on net cage, top is provided with active open; With fixing rope on the four edges that described net cage pushes up, described net cage is fixed on described floating frame; The sidewall of described net cage is provided with the adjustable opening of bore, the adjustable opening of described bore is connected with described fry collecting net osculum end;
Described flotation gear is spherical foam plastics, is connected with described fry collecting net big opening end is exaggerated.
Preferred: described fry collecting net big opening end diameter is 1.5m, and osculum end diameter is 0.3m, nets long 1.8m; Described frameless net cage is of a size of 80cm × 60cm × 60cm; Described dead lever is the long 70cm of steel dead lever of band hook, diameter 1.5cm; Described floating frame is wooden rectangle floating frame, is of a size of 80cm × 60cm, and four corner band diameters of floating frame are the circular hole of 1.8-2.0cm; Described flotation gear is spherical foam plastics, diameter 15cm.
Based on a fry collecting method for the applicable THE LOWER YANGTZE VALLEY tideway of above-mentioned fry collecting device, comprise the steps:
(1) selection of fry collecting device set-up site:
Selection river bank is straight, current are happy, floating thing is few, the river section of flow velocity 10 ~ 16 ms/min arranges fry collecting net;
(2) setting of fry collecting device:
1. fry collecting net is fixing: by 2 diameter 6-8cm, the mao bamboon of scabbling ring inserts selected fry collecting device set-up site side by side, and makes the large 30-40cm of big opening end diameter of the gap ratio fry collecting net of two mao bamboons; Flotation gear rope is connected to the exaggerated of fry collecting net big opening end, by the clamp type collar by infraclass on the big opening end of fry collecting net on fixing two mao bamboons; The rope lengths of the adjustable clamp minor collar and flotation gear, makes fry collecting net network interface just exaggeratedly just concordantly with the water surface swim in water to water (flow) direction;
2. the assembling of seedling case is collected: launched to be fixed on floating frame by net cage by dead lever, net cage is continued to use the rope carried and be fixed on floating frame; Be connected with two angles of floating frame with the clamp type collar with rope;
3. collect seedling case and fry collecting net connect and fixing: assemble complete collection seedling case put into water by 2. middle, by the osculum end of fry collecting net fixing in 1. by net cage sidewall opening with 2. in the collection seedling case that is assembled into connect, interface rope ties up to be fastened; Adjustment fry collecting net and the distance of collection seedling case, make collection net fully launch, then insert two mao bamboons; 2. two the clamp type collar covers be connected with floating frame in are hung on mao bamboon collection seedling case is fixed;
(3) cleaning of the collection of fry and fry collecting device, management maintenance:
Fry collecting device is laid and after connecting, is allowed fry enter to collect by fry collecting network game the collection that seedling case carries out fry; Every 30-40 minute dips a fry; Mention collection seedling case floating frame when dipping gently, make fry Relatively centralized, pull open top movable opening, dip fry with container band water, take back and carry out taxonomic identification or later stage cultivation cultivation on the bank; Cleaning netting gear, keeps current unimpeded, improves fry output.
The present invention compared with prior art has following advantage:
(1) fry collecting net is equipped with flotation gear and is connected with the clamp type collar, can ensure that gathering net is neither washed away by current, interception water layer can be regulated with SEA LEVEL VARIATION again, adapt to the requirement of THE LOWER YANGTZE VALLEY tideway water level diurnal variation, improve the efficiency gathering fry.
(2) connection of the clamp type collar makes the convenient fixing of collection net and collection seedling case quick, eliminates the loaded down with trivial details and inconvenient of tying-up operation under water.
(3) buckle steel dead lever provides support framework not only to collection seedling case, and it is fixed on dexterously on wooden floating frame, and the assembly and connection of whole netting gear is simple and convenient.
(4) compare fixed cage, collection seedling case adopts frameless net cage to add the combining form of buckle steel dead lever, not only takes up room during transport little, and dismounting, assembling are quick, the upset cleaning of convenient collection seedling case.
(5) movable top lid collecting seedling case not only conveniently scoops out fry, and when can prevent stormy waves, fry escapes, and improves fry collecting efficiency.
Accompanying drawing explanation
Fig. 1 is fry collecting net structural representation of the present invention.
Fig. 2 is that the present invention collects seedling box structure schematic diagram.
Embodiment
A fry collecting method for applicable THE LOWER YANGTZE VALLEY tideway, is characterized in that comprising the following steps:
(1) selection of netting gear and accessory, customization:
The netting gear that the present invention relates to and accessory are made up of fry collecting net as shown in Figure 1, 2, collection seedling case and flotation gear, jockey and fixture (mao bamboon).Described fry collecting net is cone barrel net 1, and two ends are the hard network interface 2 of band steel ring, and big opening end diameter is 1.5m, and osculum end diameter is 0.3m, nets long 1.8m, is that 28 object nylon bolting silks are made by mesh.Described collection seedling case by frameless net cage with cover, four band hook steel dead lever 9 and wooden floating frame 6 with holes assemble, wherein frameless net cage is of a size of 80cm × 60cm × 60cm, mesh is 28 orders, the cylindrical jacket limit (diameter is about 2cm) that four seamed edges of net cage side have canvas to be seamed into, on net cage, there is the rectangle active open 7 of three sideband slide fasteners on top, and with the rope that (binding) is fixing on the four edges on upper top.Net cage sidewall has bore adjustable (by rope) opening 8; The steel dead lever 9 of band hook is about 70cm, and diameter is about 1.5cm; Wooden floating frame 6 is rectangle, and inside dimension is 80cm × 60cm, and four corner band diameters of wooden floating frame 6 are the circular hole of 1.8-2.0cm.Described flotation gear is plastics ball foam 3, and diameter is about 15cm, is arranged on big opening end hard network interface exaggerated 21.Described jockey comprises the clamp type collar 4 and rope 5, and collar main body is plastic material, cover ring diameter 10-12cm, inner wall smooth.
(2) selection of fry collecting net set-up site:
The flow velocity, landform, substrate etc. of water to be considered when selecting place, the place of navigation channel, harbour and river bank avalanche be avoided.Selection river bank is straight, current are happy, floating thing is few, the river section of flow velocity 10 ~ 16 ms/min is fry collecting net set-up site.
(3) laying of netting gear and connection
1. fry collecting net is fixing: moderate for two thicknesses (diameter 6-8cm, lower with), the mao bamboon of scabbling ring are inserted selected netting gear cloth side by side and set up an office, and make the large 30-40cm of big opening end diameter of the gap ratio cone barrel net 1 of two mao bamboons; Flotation gear and the clamp type collar 4 rope are connected to the upper infraclass (flotation gear connects guiding principle) that cone barrel gathers net big opening end, by the clip end pinching the collar, two of the collar semicircles are opened, four two, the every limit of collar covers in online for cone barrel collection, infraclass are clipped on two fixing mao bamboons.Regulate the rope lengths connecting the collar and flotation gear, collection net network interface just exaggeratedly just concordantly with the water surface to be swum in water water (flow) direction.
2. the assembling of seedling case is collected: steel dead lever 9 is first passed the circular hole on wooden floating frame 6 without the one end linked up with, the canvas cover limit passing frameless net cage side seamed edge is again hooked on the corner of wooden floating frame 6, net cage is launched to be fixed on wooden floating frame 6, net cage is continued to use the rope carried and be fixed on wooden floating frame 6; With rope just the clamp type collar 4 be connected with four angles of wooden floating frame.
3. collect seedling case and fry collecting net connect and fixing: assemble complete collection seedling case put into water by 2. middle, by the osculum end of fry collecting net fixing in 1. by net cage sidewall opening 8 with 2. in the collection seedling case that is assembled into connect, interface rope ties up to be fastened; Adjustment fry collecting net and the distance of collection seedling case, make collection net fully launch, insert the moderate mao bamboon of four thicknesses in place; 2. four collar covers be connected with wooden floating frame 6 in are hung on mao bamboon collection seedling case is fixed.
(4) cleaning of the collection of fry and netting gear, management maintenance
Netting gear is laid and after connecting, just can be carried out the collection of fry.Because fry is more slim and frahile, in fry collecting process, for anti-excessively intensive and crowded or impacted and injures and deaths for a long time by current mutually, preferably often within 30-40 minute, dip once; Mention collection seedling case floating frame when dipping gently, make fry Relatively centralized, pull open movable top lid, dip fry with bowl or other container band water, take back and carry out taxonomic identification or later stage cultivation cultivation on the bank.
Because the distribution situation of fry is by the impact of the various outside environmental elements such as temperature, light, wind direction, weather, tide, during daily management is safeguarded, situation to be gathered in the crops according to fry and change in time and establish net to fish for place; Duty washes netting gear, keeps current unimpeded, improves fry output.
Claims (1)
1. adopt a fry collecting method for the applicable THE LOWER YANGTZE VALLEY tideway of fry collecting device, it is characterized in that: described fry collecting device comprises fry collecting net, the collection seedling case be connected with fry collecting net and flotation gear;
Described fry collecting net is cone barrel net, and two ends are provided with hard network interface, is that 28 object nylon bolting silks are made by mesh;
Described collection seedling case is assembled by frameless net cage with cover, four dead levers and floating frame, and wherein said net cage is rectangular shape, and mesh is 28 orders; Four dead levers are arranged on net cage four vertical seamed edges, and on net cage, top is provided with active open; With fixing rope on the four edges that described net cage pushes up, described net cage is fixed on described floating frame; The sidewall of described net cage is provided with the adjustable opening of bore, the adjustable opening of described bore is connected with described fry collecting net osculum end;
Described flotation gear is spherical foam plastics, is connected with described fry collecting net big opening end is exaggerated;
Described fry collecting method comprises the steps:
(1) selection of fry collecting device set-up site:
Selection river bank is straight, current are happy, floating thing is few, the river section of flow velocity 10 ~ 16 ms/min arranges fry collecting net;
(2) setting of fry collecting device:
1. fry collecting net is fixing: by two diameter 6-8cm, the mao bamboon of scabbling ring inserts selected fry collecting device set-up site side by side, and makes the large 30-40cm of big opening end diameter of the gap ratio fry collecting net of two mao bamboons; Flotation gear rope is connected to the exaggerated of fry collecting net big opening end, by the clamp type collar by infraclass on the big opening end of fry collecting net on fixing two mao bamboons; The rope lengths of the adjustable clamp minor collar and flotation gear, makes fry collecting net network interface just exaggeratedly just concordantly with the water surface swim in water to water (flow) direction;
2. the assembling of seedling case is collected: launched to be fixed on floating frame by net cage by dead lever, net cage is continued to use the rope carried and be fixed on floating frame; Be connected with four angles of floating frame with the clamp type collar with rope;
3. collect seedling case and fry collecting net connect and fixing: assemble complete collection seedling case put into water by 2. middle, by the osculum end of fry collecting net fixing in 1. by net cage sidewall opening with 2. in the collection seedling case that is assembled into connect, interface rope ties up to be fastened; Adjustment fry collecting net and the distance of collection seedling case, make collection net fully launch, then insert four mao bamboons; 2. four the clamp type collar covers be connected with floating frame in are hung on mao bamboon collection seedling case is fixed;
(3) cleaning of the collection of fry and fry collecting device, management maintenance:
Fry collecting device is laid and after connecting, is allowed fry enter to collect by fry collecting network game the collection that seedling case carries out fry; Every 30-40 minute dips a fry; Mention collection seedling case floating frame when dipping gently, make fry Relatively centralized, pull open top movable opening, dip fry with container band water, take back and carry out taxonomic identification or later stage cultivation cultivation on the bank; Cleaning netting gear, keeps current unimpeded, improves fry output.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410342820.9A CN104137813B (en) | 2014-07-17 | 2014-07-17 | A kind of fry collecting method of fry collecting device and applicable THE LOWER YANGTZE VALLEY tideway |
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| CN201410342820.9A CN104137813B (en) | 2014-07-17 | 2014-07-17 | A kind of fry collecting method of fry collecting device and applicable THE LOWER YANGTZE VALLEY tideway |
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| CN104137813B true CN104137813B (en) | 2016-04-13 |
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| CN106070097A (en) * | 2016-08-12 | 2016-11-09 | 福建省淡水水产研究所 | Tilapia postlarva collection device and collection method |
| CN106719487B (en) * | 2016-12-16 | 2023-12-01 | 江苏天时利和水产养殖高新技术有限公司 | Remote control underwater small-specification biological collector |
| CN106937627A (en) * | 2017-04-11 | 2017-07-11 | 中国水产科学研究院珠江水产研究所 | A kind of Japanese eel seedling finishing device and application method |
| CN108174828A (en) * | 2018-02-24 | 2018-06-19 | 常熟理工学院 | California perch sampling method |
| CN108967272A (en) * | 2018-06-20 | 2018-12-11 | 江苏中也食品进出口有限公司 | A kind of Coilia ectenes in Yangtze River fish-egg collection device and its application method |
| CN109644955B (en) * | 2018-12-11 | 2021-05-18 | 浙江省海洋水产研究所 | Device and method for catching bottom layer fish resources in middle and deep sea |
| CN114698608B (en) * | 2022-04-27 | 2022-12-20 | 北京市农林科学院 | Non-contact type fish sampling device for aquaculture pond |
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