CN213029539U - Trawl net device - Google Patents
Trawl net device Download PDFInfo
- Publication number
- CN213029539U CN213029539U CN202021886524.2U CN202021886524U CN213029539U CN 213029539 U CN213029539 U CN 213029539U CN 202021886524 U CN202021886524 U CN 202021886524U CN 213029539 U CN213029539 U CN 213029539U
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- China
- Prior art keywords
- fishing net
- fishing
- shoal
- subassembly
- component
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- 238000005188 flotation Methods 0.000 abstract description 3
- 241000251468 Actinopterygii Species 0.000 description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 238000005070 sampling Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 241000894007 species Species 0.000 description 2
- 230000006399 behavior Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000001617 migratory effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Images
Abstract
The utility model provides a trawl device. Comprises a fishing net component and a stay bar arranged at the opening of the fishing net component; the top of the stay bar is connected with the buoy through a rope with adjustable length; the stay bar is also provided with a hauling rope used for being connected with a fishing boat; the fishing net component comprises a first fishing net and a second fishing net; the open end of first fishing net is connected with the vaulting pole, the end of first fishing net is equipped with the tapered mouth that the specification reduces gradually, the open end of second fishing net is connected the end of first fishing net. The utility model discloses a setting has the fishing net subassembly of vaulting pole, and the fishing net subassembly is connected to the flotation pontoon through the rope of adjustable length, can adjust the degree of depth that the fishing net subassembly is located, realizes fishing the shoal of the different degree of depth of reservoir, and the fishing net subassembly can prevent the shoal to escape, is convenient for investigate shoal kind and shoal density of the different degree of depth of reservoir.
Description
Technical Field
The utility model relates to a shoal of fish ecological management technical field, concretely relates to trawl apparatus.
Background
According to the records of data, including introduction species, 1384 species of inland fishes in China are abundant in variety, not only the level of biodiversity is high, but also the treasure house of the biogenetic diversity in China is provided. China has a plurality of reservoirs, most of which are canyon type reservoirs, and has the characteristic of larger water depth. The reservoir is an important fishery water area in China, and on the one hand, the reservoir is an important economic source of local fishery economy; on the other hand, fishery ecological parameters such as reservoir fish population structure, age composition, resource storage amount, spatial distribution, periodic variation and the like are important theoretical bases for reservoir fishery resource management and reservoir fishery sustainable development.
At present, reservoir fish sampling methods and nets comprise barbed nets (composite type and single type), fixed nets, lifting nets, ground cages, and the like, and the underwater acoustic technology is more and more widely applied. The investigation and sampling methods have certain defects, wherein the gill net sampling water layer is mainly a middle and upper water area or a shallow reservoir; the fixed net is mainly applied to a near-shore area and is not suitable for a deep water area; the ground cage is only suitable for sampling small fishes on the bottom layer; the hydro-acoustic method cannot accurately distinguish the types and needs fishery catch sampling for assistance.
In view of the above, there is a need for a trawl apparatus to solve the problems in the prior art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a trawl device to solve the problem of the different degree of depth shoal kind of reservoir and density statistics.
In order to realize the purpose, the utility model provides a trawl apparatus, which comprises a fishing net component and a brace rod arranged at the opening of the fishing net component; the top of the stay bar is connected with the buoy through a rope with adjustable length; the stay bar is also provided with a hauling rope used for being connected with a fishing boat.
Preferably, the fishing net component comprises a first fishing net and a second fishing net; the open end of first fishing net is connected with the vaulting pole, the end of first fishing net is equipped with the tapered mouth that the specification reduces gradually, the open end of second fishing net is connected the end of first fishing net.
Preferably, a sinker is arranged at the bottom end of the opening of the fishing net component; and a floater is arranged at the top end of the opening of the fishing net component.
Preferably, an underwater camera is arranged on the stay bar.
Use the technical scheme of the utility model, following beneficial effect has:
(1) the utility model discloses in, have the fishing net subassembly of vaulting pole through the setting, the fishing net subassembly is connected to the flotation pontoon through the rope of adjustable length, can adjust the degree of depth that the fishing net subassembly is located, realizes fishing for the shoal of the different degree of depth of reservoir, is convenient for investigate shoal kind and shoal density of the different degree of depth of reservoir.
(2) The utility model discloses in, through setting up the bell at the end of first fishing net, the end at first fishing net is connected to the second fishing net, and the shoal of fish is from the bell trip to the second fishing net of first fishing net back, is difficult to the migratory to first fishing net in, reduces the condition that the shoal of fish escaped, influences final statistical result.
(3) The utility model discloses in, set up the sinker through the bottom at fishing net subassembly opening part, set up the float on the top of fishing net subassembly opening part, make fishing net subassembly opening part catch the net gape and open, the shoal of being convenient for goes into the net.
(4) The utility model discloses in, through set up camera under water on the vaulting pole, can be used to observe the kind of shoal of fish under water, the action of record shoal of fish, whether still can observe whether have the fish to escape from the fishing net subassembly simultaneously, revise the volume of catching.
In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:
FIG. 1 is a schematic diagram of a trawl apparatus according to an embodiment of the present application;
the underwater camera comprises a fishing net component 1, a first fishing net 1.1, a first fishing net 1.2, a second fishing net 1.3, a sinker 1.4, a floater 2, a stay bar 3, a buoy 4, a hauling rope 5 and an underwater camera.
Detailed Description
The embodiments of the invention will be described in detail hereinafter with reference to the accompanying drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims.
Example (b):
referring to fig. 1, the embodiment of the trawl apparatus is applied to survey the fish shoal types and fish shoal densities at different depths of a reservoir.
A trawl apparatus, including fishing net assembly 1 and brace rod 2 set up in the opening place of fishing net assembly 1, in this embodiment, the brace rod 2 is set up in both sides of the opening place of fishing net assembly 1, make the fishing net mouth of the fishing net assembly 1 open, facilitate catching the shoal of fish; the top of the support rod 2 is connected with the buoy 3 through a rope with adjustable length, the total weight of the fishing net component 1 and the support rod 2 is smaller than the buoyancy of the buoy 3, the length of the rope can be adjusted by arranging a hoisting mechanism, and the length of the rope can be directly changed by knotting, cutting and the like, so that the fishing depth of the fishing net component 1 is adjusted, and the types and the density of fish groups in different depths of the reservoir can be conveniently investigated; and the stay bar 2 is also provided with a towing rope 4 used for being connected with a fishing boat, and the movement of the trawl device in water is realized by towing the fishing boat.
The fishing net component 1 comprises a first fishing net 1.1 and a second fishing net 1.2; the opening end of the first fishing net 1.1 is connected with the support rod 2, the tail end of the first fishing net 1.1 is provided with a tapered opening with gradually reduced specification, and the diameter of the tapered opening is 10-20 cm; the open end of second fishing net 1.2 is connected the end of first fishing net 1.1, the end of second fishing net 1.2 is sealed, and the shoal of fish swims into second fishing net 1.2 from the cone opening of the end of first fishing net 1.1, because the effect of dragging of fishing boat, produce relative motion between rivers and the fishing net subassembly 1 and exert pressure to the shoal of fish, simultaneously because the cone opening specification of first fishing net 1.1 is less, can prevent that the shoal of fish from escaping from second fishing net 1.2.
The bottom end of the opening of the fishing net component 1 is provided with a sinker 1.3, and the sinker 1.3 is a heavy object which can make the bottom end of the fishing net component 1 sink, such as a stone, a sand bag and the like; the top end of the opening of the fishing net component 1 is provided with a floater 1.4 which can be made of hollow plastic pieces, rubber pieces and the like; under the action of the sinker 1.3 and the floater 1.4, the fishing net port of the fishing net component 1 is expanded along the vertical direction, so that fish shoals can enter the fishing net component 1 conveniently.
The supporting rods 2 are provided with underwater cameras 5 for observing the types of underwater fish schools, recording the behaviors of the fish schools, and meanwhile, observing whether fish escape from the fishing net component 1 or not, and correcting the fishing amount of the fishing net component 1 in different depths of the reservoir.
The use method of the trawl apparatus comprises the following steps: install the tow rope 4 of trawl device to the fishing boat on, adjust 2 tops of vaulting pole to the distance of flotation pontoon 3 (adjusting rope length promptly), make fishing net subassembly 1 be in the target degree of depth, the fishing boat pulls the trawl device and mentions the trawl device after traveling a certain specific distance, kind and the quantity of shoal in the statistics fishing net subassembly 1, revise the volume of catching according to the record picture of camera 5 under water again, catch through placing fishing net subassembly 1 in the reservoir degree of depth of difference, can statistics reservoir different degree of depth shoal's kind and density.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A trawl apparatus is characterized by comprising a fishing net component (1) and a stay bar (2) arranged at the opening of the fishing net component (1); the top of the stay bar (2) is connected with a buoy (3) through a rope with adjustable length; the stay bar (2) is also provided with a hauling rope (4) used for being connected with a fishing boat.
2. A trawl apparatus according to claim 1, wherein the fishing net assembly (1) comprises a first fishing net (1.1) and a second fishing net (1.2); the open end of first fishing net (1.1) is connected with vaulting pole (2), the end of first fishing net (1.1) is equipped with the taper mouth that the specification reduces gradually, the open end of second fishing net (1.2) is connected the end of first fishing net (1.1).
3. A trawl apparatus according to claim 1, wherein the bottom end of the opening of the fishing net assembly (1) is provided with a sinker (1.3); the top end of the opening of the fishing net component (1) is provided with a floater (1.4).
4. A trawl apparatus according to claim 1, wherein the stay (2) is provided with an underwater camera (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021886524.2U CN213029539U (en) | 2020-09-02 | 2020-09-02 | Trawl net device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021886524.2U CN213029539U (en) | 2020-09-02 | 2020-09-02 | Trawl net device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213029539U true CN213029539U (en) | 2021-04-23 |
Family
ID=75533495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021886524.2U Expired - Fee Related CN213029539U (en) | 2020-09-02 | 2020-09-02 | Trawl net device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213029539U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114128682A (en) * | 2021-11-30 | 2022-03-04 | 大连海洋大学 | Flounder fishing device and method |
-
2020
- 2020-09-02 CN CN202021886524.2U patent/CN213029539U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114128682A (en) * | 2021-11-30 | 2022-03-04 | 大连海洋大学 | Flounder fishing device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210423 |