CN109077033A - A kind of multi-joint quantitative sampling net of fish-egg larva and juvenile - Google Patents
A kind of multi-joint quantitative sampling net of fish-egg larva and juvenile Download PDFInfo
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- CN109077033A CN109077033A CN201811004324.7A CN201811004324A CN109077033A CN 109077033 A CN109077033 A CN 109077033A CN 201811004324 A CN201811004324 A CN 201811004324A CN 109077033 A CN109077033 A CN 109077033A
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- sail
- net
- keed
- opening
- fish
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- 238000005070 sampling Methods 0.000 title claims abstract description 34
- 230000000366 juvenile effect Effects 0.000 title claims abstract description 23
- 238000004062 sedimentation Methods 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 230000007246 mechanism Effects 0.000 claims description 28
- 230000005540 biological transmission Effects 0.000 claims description 16
- 238000000429 assembly Methods 0.000 claims description 12
- 230000000712 assembly Effects 0.000 claims description 9
- 239000000835 fiber Substances 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims 1
- 230000008450 motivation Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 239000002775 capsule Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000003643 water by type Substances 0.000 description 2
- 102000002322 Egg Proteins Human genes 0.000 description 1
- 108010000912 Egg Proteins Proteins 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 210000004681 ovum Anatomy 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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- 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
-
- 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
- A01K73/04—Devices for spreading or positioning, e.g. control thereof
-
- 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
- A01K73/06—Hauling devices for the headlines
-
- 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
- A01K75/00—Accessories for fishing nets; Details of fishing nets, e.g. structure
-
- 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
- A01K75/00—Accessories for fishing nets; Details of fishing nets, e.g. structure
- A01K75/04—Floats
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Marine Sciences & Fisheries (AREA)
- Farming Of Fish And Shellfish (AREA)
Abstract
The present invention provides a kind of multi-joint quantitative sampling net of fish-egg larva and juvenile, including rigid frame, body net, flexible sedimentation sail, multiple keeds and keed controller for opening and closing；The opening portion outer of body net is fixed on the first face of rigid frame；Flexibility sedimentation sail includes sail body and windsurfing, and windsurfing is respectively perpendicular the both ends for being fixed on the first face of sail body and middle part and is arranged respectively along the width direction of sail body；The section of sail body in the width direction is in the arc being recessed to sail body the second face direction；And sail body is bent to the direction in the first face of sail body along its length；Sail body is detachably secured to the bottom of rigid frame by windsurfing；Keed controller for opening and closing is arranged the rear portion for being fixed on body net, and the opening portion of each keed is connected in keed controller for opening and closing.The multi-joint quantitative sampling net of a kind of fish-egg larva and juvenile of the invention, keed energy automatic shutter, and network interface area is constant when certifiable sampling operation, the towing depth of water does not change with ship's speed, and it is easy to carry, good convenient for storage and stability also to have the advantages that.
Description
Technical field
The present invention relates to sampling network field more particularly to a kind of multi-joint quantitative sampling nets of fish-egg larva and juvenile.
Background technique
To reinforce fishery resources really, fully understand marine ecosystem, need the specific fingerling of quantitative collection ovum and
Its larva and juvenile grasps its stock number.Still lacking a kind of keed at present can restrain oneself formula opening and closing, and the multilayer that can be pulled at a high speed is quantitative
Sample trawlnet.
Currently, the external multilayer Sampling Survey for larva and juvenile, mainly uses MOCNESS, RMT and LOCHNESS etc.
The multilayer of type samples trawlnet.Wherein, it includes towing that MOCNESS, which samples trawlnet and can aboard ship be read in real time by armored cable,
Much information including state, but network interface gradient is big, and towing speed is no more than 2.0 sections or so, and price is very expensive.RMT is adopted
Sample off-grid carries out network interface opening and closing using 4 horizon bars, but drags guiding principle above network interface, can only the operation below 2.0 sections.
The network interface frame that LOCHNESS samples trawlnet is tridimensional structure, network interface area 5.0m2Frame weight at 1.0 tons or more, no
It is suitble to middle-size and small-size research vessel to use.The network interface of the especially existing all kinds of multilayer sampling networks such as MOCNESS, LOCHNESS, RMT is opened
It closes and needs to control by armored cable, while must be equipped with corresponding winch, price is very expensive.
Summary of the invention
In view of the deficiency of the prior art, the present invention provides a kind of multi-joint quantitative sampling net of fish-egg larva and juvenile, capsule
Net energy automatic shutter, and network interface area is constant when certifiable sampling operation, the towing depth of water does not change with ship's speed, and it also has just
In carrying, convenient for the good advantage of storage and stability.
To achieve the goals above, the present invention provides a kind of multi-joint quantitative sampling net of fish-egg larva and juvenile, including a rigid frame
Frame, the whole body net, a flexible sedimentation sail, multiple keeds and a keed controller for opening and closing；The opening portion outer of the body net is fixed
In on the first face of the rigid frame；The flexible sedimentation sail includes a sail body and multiple windsurfings, and the windsurfing is respectively perpendicular
Be fixed on the first face of the sail body both ends and middle part and respectively along the sail body width direction be arranged；The sail body is along wide
The section in degree direction is in the arc being recessed to sail body the second face direction；And the sail body is along its length to the sail body
The direction in the first face is bent；The sail body is detachably secured to the bottom of the rigid frame by the windsurfing；The capsule
Net controller for opening and closing and the rigid frame are arranged the rear portion for being fixed on the body net, each keed in a fixed angle
Opening portion be connected in the keed controller for opening and closing, the keed controller for opening and closing is for after controlling the body net
The opening and closing in portion and the opening portion of each keed.
Preferably, the keed controller for opening and closing includes a rectangle frame body, two guide rods, multiple network interface connection bars, one
Transmission mechanism and a control mechanism；Two guide rods are parallel to each other and are fixed on along the vertical direction the two of the rectangle frame body
Side；The both ends of the network interface connection bar are sheathed on respectively on two guide rods；It is adjacent that the opening portion of the keed is fixed on two
Between the network interface connection bar；Each network interface connection bar can reciprocally be passed with the transmission mechanism along the vertical direction
Dynamic connection, the control mechanism connect the transmission mechanism；The rear portion of the body net, which is worn, to be fixed in the rectangle rack body simultaneously
Between a network interface connection bar of bottommost and rectangle frame body bottom edge.
Preferably, the transmission mechanism includes an at least stepper motor and multiple tether assemblies, each tether assemblies
First end is separately connected a network interface connection bar, and the second end of the tether assemblies is fixed on the shaft of the stepper motor,
The stepper motor connects the control mechanism.
Preferably, the control mechanism include a controller and the chronoscope being connect with the controller, a memory,
One water gage, a water thermometer, a tilt detection instrument and flow meters；The controller connects the transmission mechanism, the flow
Meter is fixed on the rectangle frame body.
Preferably, the range of the fixed angle is 15 °~30 °.
Preferably, the camber of the arc is 10%~20%；The sail body and a tow direction are rushed in 20 °~30 °
Angle；When the sail body and the tow direction are in 25 ° of angles of attack, the sedimentation force coefficient of the flexible sedimentation sail is 1.2 or close
1.2, the resistance coefficient of the flexible sedimentation sail is 0.5 or close to 0.5.
Preferably, the two sides in the second face of the rigid frame, which respectively correspond, is fixed with one and drags guiding principle connector, described to drag guiding principle
Connector is formed along the vertical direction multiple drags guiding principle connecting hole.
Preferably, the top of the rigid frame and the rectangle frame body is respectively fixed with an at least float.
Preferably, the rigid frame is formed in rectangle and being removably cooperatively connected by multiple sub-assemblies.
Preferably, the body net and the keed use Buddhist nun fiber crops without tubercle square mesh etting.
The present invention due to use above technical scheme, make it have it is following the utility model has the advantages that
Network interface area is constant when the use of rigid frame can guarantee sampling operation, while rigid frame uses knockdown knot
Structure is easy to carry and stores, while being also convenient for the installation of body net.The settling capacity and resistance that flexibility sedimentation sail generates can be used for adjusting
The posture direction of rigid frame.Flexibility sedimentation sail is detachably connected with rigid frame, so that the maintenance of flexible sedimentation sail is more just
Victory, and maintenance cost can be effectively reduced.The cooperation of body net, multiple keeds and keed controller for opening and closing is, it can be achieved that multiple keeds
Automatic shutter control, thus realize multiple depth of waters automatic sampling operation.Multiple structures for draging guiding principle connecting hole can be realized pair
The adjustment for draging guiding principle Yu rigid frame link position, with flexibility sedimentation sail cooperation, rigid frame posture is straight when can keep sampling operation
It is vertical not generate inclination.By the cooperation of float and rigid frame, the stability of the rigid frame towing depth of water can be effectively increased.Combination
The rigid frame structure of formula is readily transported and stores, and is convenient for the installation of body net.Chronoscope is controlled for timing, can be by setting
Towing delay is set so that controller after a period of time, stablizes the opening and closing for controlling keed network interface when towing again in net after putting net.It deposits
Reservoir is for the storage of pre-set programs and the record of data.Chronoscope, memory, water gage, water thermometer, tilt detection instrument and stream
The cooperation of meter, can be according to towing time, the towing depth of water and network interface so that a kind of multi-joint quantitative sampling net of fish-egg larva and juvenile
Inflow automatically selects the opening and closing scheme of preset keed network interface, and the opening and closing by being pre-stored in memory imposes a condition, and does not need
It is controlled on ship by armored cable, each keed energy automatic shutter, while including operating water depth, water temperature and sampling net state etc.
Time series data can be embodied in memory.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the multi-joint quantitative sampling net of fish-egg larva and juvenile of the embodiment of the present invention；
Fig. 2 is the flexible sedimentation sail structural schematic diagram of the embodiment of the present invention；
Fig. 3 is the front view of the keed controller for opening and closing of the embodiment of the present invention；
Fig. 4 is the side view of the keed controller for opening and closing of the embodiment of the present invention.
Specific embodiment
Below according to attached FIG. 1 to FIG. 4, presently preferred embodiments of the present invention is provided, and is described in detail, is enabled more preferable geographical
Solve function of the invention, feature.
Referring to Fig. 1, a kind of multi-joint quantitative sampling net of fish-egg larva and juvenile of the embodiment of the present invention, including a rigid frame 1,
The flexible sedimentation sail 3 of the whole body net 2, one, multiple keeds 4 and a keed controller for opening and closing 5；The opening portion outer of body net 2 is fixed on
On first face of rigid frame 1；Flexibility sedimentation sail 3 includes a sail body 31 and multiple windsurfings 32, and windsurfing 32, which is respectively perpendicular, to be fixed on
The both ends and middle part in the first face of sail body 31 are simultaneously arranged along the width direction of sail body 31 respectively；The section of sail body 31 in the width direction
In the arc being recessed to 31 second face direction of sail body；And sail body 31 is bent to the direction in the first face of sail body 31 along its length；
Sail body 31 is detachably secured to the bottom of rigid frame 1 by windsurfing 32；Keed controller for opening and closing 5 is in rigid frame 1
It is arranged to one fixed angle the rear portion for being fixed on body net 2, the opening portion of each keed 4 is connected in keed controller for opening and closing 5, capsule
Net controller for opening and closing 5 is used to control the opening and closing at the rear portion of body net 2 and the opening portion of each keed 4.
Network interface area is constant when the use of rigid frame 1 can guarantee sampling operation, while rigid frame 1 is using knockdown
Structure is easy to carry and stores, while being also convenient for the installation of body net.The settling capacity and resistance that flexibility sedimentation sail 3 generates can be used for adjusting
The posture direction of whole rigid frame 1.Flexibility sedimentation sail 3 is detachably connected with rigid frame 1, so that the maintenance of flexible sedimentation sail 3
It is more convenient, and maintenance cost can be effectively reduced.The cooperation of body net 2, multiple keeds 4 and keed controller for opening and closing 5, it can be achieved that
The automatic shutter of multiple keeds 4 controls, to realize the automatic sampling operation in multiple depth of waters.
In the present embodiment, the range of fixed angle is 15 °~30 °.The camber of arc is 10%~20%；Sail body 31 and one
Tow direction is in 20 °~30 ° of the angle of attack；When sail body 31 and tow direction are in 25 ° of angles of attack, the settling capacity system of flexibility sedimentation sail 3
Number is 1.2 or close to 1.2, and the resistance coefficient of flexibility sedimentation sail 3 is 0.5 or close to 0.5.
The two sides in the second face of rigid frame 1, which respectively correspond, to be fixed with one and drags guiding principle connector 6, drags guiding principle connector 6 along vertical
Direction, which is formed, multiple drags guiding principle connecting hole 61.Multiple structures for draging guiding principle connecting hole 61 can be realized to draging guiding principle 8 and 1 connection position of rigid frame
The adjustment set cooperates with flexibility sedimentation sail 3,1 posture of rigid frame when sampling operation can be kept not generate inclination uprightly.
High-intensitive and light weight steel, rigid frame 1 and rectangle frame body 51 can be used in rigid frame 1 and rectangle frame body 51
Top be respectively fixed with an at least float 7.By the cooperation of float 7 and rigid frame 1 and rectangle frame body 51, can effectively increase
The stability of the towing depth of water of rigid frame 1 and rectangle frame body 51.
Rigid frame 1 is formed in rectangle and being removably cooperatively connected by multiple sub-assemblies.For example, rigid frame 1 can be by
Four frame edge pieces and four connectors are constituted, and four frame edge pieces cooperatively form rectangle, connector be connected to two adjacent frame edge pieces it
Between.Knockdown 1 structure of rigid frame, is readily transported and stores, and is convenient for the installation of body net 2.
Body net 2 and keed 4 can be adopted using Buddhist nun fiber crops without tubercle square mesh etting, the aperture of etting and the thickness of cable according to required
Sample object organisms are selected and are adjusted.
Fig. 3 and Fig. 4 are please referred to, keed controller for opening and closing 5 includes a rectangle frame body 51, two guide rods 52, multiple network interfaces
Connecting rod 53, a transmission mechanism 54 and a control mechanism (not shown)；Two guide rods 52 are parallel to each other and consolidate along the vertical direction
Due to the two sides of rectangle frame body 51；The both ends of network interface connection bar 53 are sheathed on respectively on two guide rods 52；The opening portion of keed 4 is solid
Due between two adjacent network interface connection bars 53；Each network interface connection bar 53 can be passed reciprocally along the vertical direction with transmission mechanism 54
Dynamic connection, control mechanism connect transmission mechanism 54；The rear portion of body net 2, which is worn, to be fixed in rectangle frame body 51 and is located at bottommost
Between 51 bottom edge of one network interface connection bar 53 and rectangle frame body.
Guide rod 52 is used to provide guiding for the transmission of network interface connection bar 53, limits the movement routine of network interface connection bar 53,
And then guarantee the stability of 4 network interface of keed opening and closing.The cooperation of network interface connection bar 53, transmission mechanism 54 and control mechanism realizes pair
The automatic control of 4 network interface of keed opening and closing.
Transmission mechanism 54 includes at least a stepper motor 541 and multiple tether assemblies 542, and the first of each tether assemblies 542
End is separately connected a network interface connection bar 53, and the second end of tether assemblies 542 is fixed on the shaft of stepper motor 541, stepper motor
541 connection control mechanisms.
In the present embodiment, control mechanism includes a controller and a chronoscope connected to the controller, a memory, a water
Deep meter, a water thermometer, a tilt detection instrument and flow meters；Controller connects transmission mechanism 54, and flowmeter is fixed on rectangle rack
On body.
Chronoscope is controlled for timing, can by setting towing delay so that controller is after putting net after a period of time,
Net stablizes the opening and closing for controlling 4 network interface of keed when towing again.Memory is for the storage of pre-set programs and the record of data.Timing
Meter, memory, water gage, water thermometer, tilt detection instrument and flowmeter cooperation so that the present embodiment a kind of fish-egg larva and juvenile
Multi-joint quantitative sampling net can automatically select preset 4 network interface of keed according to the inflow of towing time, the towing depth of water and network interface
Opening and closing scheme, by be pre-stored in memory opening and closing impose a condition, do not need on ship by armored cable control, each keed
4 energy automatic shutters, while the time series data including operating water depth, water temperature and sampling net state etc. can be embodied in memory
It is interior.
The present invention has been described in detail with reference to the accompanying drawings, those skilled in the art can be according to upper
It states and bright many variations example is made to the present invention.Thus, certain details in embodiment should not constitute limitation of the invention, this
Invention will be using the range that the appended claims define as protection scope of the present invention.
Claims (10)
1. a kind of multi-joint quantitative sampling net of fish-egg larva and juvenile, which is characterized in that heavy including a rigid frame, the whole body net, a flexibility
It lowers a sail, multiple keeds and a keed controller for opening and closing；The of the rigid frame is fixed in the opening portion outer of the body net
On on one side；The flexible sedimentation sail includes a sail body and multiple windsurfings, and the windsurfing, which is respectively perpendicular, is fixed on the of the sail body
Both ends and middle part on one side are simultaneously arranged along the width direction of the sail body respectively；The section of the sail body in the width direction is in institute
State the arc of sail body the second face direction recess；And the sail body is bent to the direction in the first face of the sail body along its length；
The sail body is detachably secured to the bottom of the rigid frame by the windsurfing；The keed controller for opening and closing and institute
It states rigid frame and is arranged the rear portion for being fixed on the body net in a fixed angle, the opening portion of each keed is connected to described
In keed controller for opening and closing, the keed controller for opening and closing is for controlling the rear portion of the body net and opening for each keed
The opening and closing of oral area.
2. the multi-joint quantitative sampling net of a kind of fish-egg larva and juvenile according to claim 1, which is characterized in that the keed opening and closing
Control device includes a rectangle frame body, two guide rods, multiple network interface connection bars, a transmission mechanism and a control mechanism；Described in two
Guide rod is parallel to each other and is fixed on the two sides of the rectangle frame body along the vertical direction；The both ends of the network interface connection bar cover respectively
On two guide rods；The opening portion of the keed is fixed between the two adjacent network interface connection bars；Each network interface
Connecting rod can reciprocally be sequentially connected with the transmission mechanism along the vertical direction, and the control mechanism connects the biography
Motivation structure；The rear portion of the body net wear the network interface connection bar for being fixed in the rectangle rack body and being located at bottommost and
Between rectangle frame body bottom edge.
3. the multi-joint quantitative sampling net of a kind of fish-egg larva and juvenile according to claim 2, which is characterized in that the transmission mechanism
Including an at least stepper motor and multiple tether assemblies, the first end of each tether assemblies is separately connected a network interface connection
Bar, the second end of the tether assemblies are fixed on the shaft of the stepper motor, and the stepper motor connects the control mechanism.
4. the multi-joint quantitative sampling net of a kind of fish-egg larva and juvenile according to claim 2, which is characterized in that the control mechanism
Including a controller and the chronoscope being connect with the controller, a memory, a water gage, a water thermometer, an inclination inspection
Survey instrument and flow meters；The controller connects the transmission mechanism, and the flowmeter is fixed on the rectangle frame body.
5. according to a kind of described in any item multi-joint quantitative sampling nets of fish-egg larva and juvenile of claim 2~4, which is characterized in that institute
The range for stating fixed angle is 15 °~30 °.
6. the multi-joint quantitative sampling net of a kind of fish-egg larva and juvenile according to claim 5, which is characterized in that the arc it is curved
Degree is 10%~20%；The sail body and a tow direction are in 20 °~30 ° of the angle of attack；When the sail body and the tow direction
When in 25 ° of angles of attack, the sedimentation force coefficient of the flexible sedimentation sail is 1.2 or close to 1.2, and the flexibility settles the resistance coefficient of sail
It is 0.5 or close to 0.5.
7. the multi-joint quantitative sampling net of a kind of fish-egg larva and juvenile according to claim 6, which is characterized in that the rigid frame
The two sides in the second face respectively correspond and be fixed with one and drag guiding principle connector, it is described drag guiding principle connector and formed along the vertical direction multiple drag guiding principle
Connecting hole.
8. the multi-joint quantitative sampling net of a kind of fish-egg larva and juvenile according to claim 7, which is characterized in that the rigid frame
An at least float is respectively fixed with the top of the rectangle frame body.
9. the multi-joint quantitative sampling net of a kind of fish-egg larva and juvenile according to claim 8, which is characterized in that the rigid frame
It is formed in rectangle and being removably cooperatively connected by multiple sub-assemblies.
10. the multi-joint quantitative sampling net of a kind of fish-egg larva and juvenile according to claim 9, which is characterized in that the body net and
The keed is using Buddhist nun fiber crops without tubercle square mesh etting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811004324.7A CN109077033A (en) | 2018-08-30 | 2018-08-30 | A kind of multi-joint quantitative sampling net of fish-egg larva and juvenile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811004324.7A CN109077033A (en) | 2018-08-30 | 2018-08-30 | A kind of multi-joint quantitative sampling net of fish-egg larva and juvenile |
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| CN109077033A true CN109077033A (en) | 2018-12-25 |
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| CN201811004324.7A Pending CN109077033A (en) | 2018-08-30 | 2018-08-30 | A kind of multi-joint quantitative sampling net of fish-egg larva and juvenile |
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Cited By (4)
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| CN110521681A (en) * | 2019-09-29 | 2019-12-03 | 浙江海洋大学 | A kind of tear-away Cod-ends of Trawl of nested type separation catches and operational method |
| CN111528185A (en) * | 2020-05-27 | 2020-08-14 | 中国水产科学研究院东海水产研究所 | Anti-blocking releasing device for continuous fishing of euphausia superba trawl |
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| CN112450163A (en) * | 2020-11-03 | 2021-03-09 | 中国水产科学研究院南海水产研究所 | Double-layer net for collecting escaping catches |
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| CN110521681A (en) * | 2019-09-29 | 2019-12-03 | 浙江海洋大学 | A kind of tear-away Cod-ends of Trawl of nested type separation catches and operational method |
| CN111528185A (en) * | 2020-05-27 | 2020-08-14 | 中国水产科学研究院东海水产研究所 | Anti-blocking releasing device for continuous fishing of euphausia superba trawl |
| CN112056280A (en) * | 2020-08-26 | 2020-12-11 | 中国水产科学研究院东海水产研究所 | Layered sampling net |
| CN112450163A (en) * | 2020-11-03 | 2021-03-09 | 中国水产科学研究院南海水产研究所 | Double-layer net for collecting escaping catches |
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Application publication date: 20181225 |