AU2020101448A4 - Drift net capable of quantitatively calculating fishery resources - Google Patents
Drift net capable of quantitatively calculating fishery resources Download PDFInfo
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- AU2020101448A4 AU2020101448A4 AU2020101448A AU2020101448A AU2020101448A4 AU 2020101448 A4 AU2020101448 A4 AU 2020101448A4 AU 2020101448 A AU2020101448 A AU 2020101448A AU 2020101448 A AU2020101448 A AU 2020101448A AU 2020101448 A4 AU2020101448 A4 AU 2020101448A4
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- Australia
- Prior art keywords
- drift net
- drift
- net
- fishery resources
- detachably connected
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Abstract
The utility model relates to a drift net capable of quantitatively calculating fishery
resources. The drift net is characterized by including a first drift net, a second drift
net, a third drift net, a float, a connecting rope, a flow meter and a lead sinker,
wherein the second drift net is detachably connected with the first drift net on one
side and detachably connected with the third drift net on the other side thereof; the
float is fixedly connected with the connecting rope on the underside thereof; the
connecting rope is detachably connected with the first drift net, the second drift net
and the third drift net on the underside thereof; the lead sinker is detachably
connected with the first drift net, the second drift net and the third drift net on the
upside thereof; and the connecting rope is fixedly connected with the flow meter. The
utility model performs the survey on the fishery resources by using the drift net and
the flow meter, which solves the problem that the fishery resources may not be
quantitatively calculated by sampling with the drift net. The utility model may
provide a netting with different meshes according to sizes of fish for respectively
catching fish with specific sizes without catching other fish due to the adoption of a
multilayer detachable drift net, thereby preventing the accidental catch and reducing
the impact on the fishery resources and the ecological environment.
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Figure 2
Description
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Figure 2
[0001] The utility model particularly relates to a drift net capable of quantitatively calculating fishery resources.
[0002] The survey on fishery resources is widely applied in seawater and freshwater as a means of managing and developing the fishery resources. The selection on a sampling method for the survey on the fishery resource, as an effective method for related researches in offshore regions, directly determines the accuracy of its results. Further, the selection has a direct effect on the estimation of resources of fish and large invertebrate species in a survey region and even research results of the ecology of its species and communities. In recent years, with the large-scale construction of reef-mounting type marine ranching, the change in the amount of the fishery resources in artificial reef construction regions and the change in the ecosystem have attracted more and more attention. However, since no quantitative sampling tools suitable for complex terrains such as coral reef regions and artificial reef regions exist, there have been great difficulties in quantitative calculation of the amount of the fishery resources in the artificial reef regions.
[0003] At present, there have been great difficulties in quantitative calculation of the fishery resources in complex terrains such as coral reef regions and artificial reef regions. When trawl nets are used for performing the survey, it is necessary to keep away from the artificial reef regions and other rocky reef regions, resulting in incomplete collection of samples, which cannot reflect the level of the fishery resources within the artificial reef regions. In some studies, gill nets and ground cages are used for performing sampling. These sampling tools have the advantage of being placed in complex seabed conditions. They may be operated under different water depths and in sea regions with poor sediments, and may only perform qualitative analysis or comparative research but not quantitative calculation. Accordingly, results obtained are incomprehensive.
[0004] In order to solve the above-mentioned problems, the utility model provides a drift net capable of quantitatively calculating fishery resources. The drift net may be used for surveying the fishery resources in complex terrains such as coral reef regions and artificial reef regions, and quantitatively calculating the amount of the fishery resources.
[0005] A drift net capable of quantitatively calculating fishery resources is characterized by including a first drift net, a second drift net, a third drift net, a float, a connecting rope, a flow meter and a lead sinker, wherein the second drift net is detachably connected with the first drift net on one side and detachably connected with the third drift net on the other side thereof; the float is fixedly connected with the connecting rope on the underside thereof; the connecting rope is detachably connected with the first drift net, the second drift net and the third drift net on the underside thereof; the lead sinker is detachably connected with the first drift net, the second drift net and the third drift net on the upside thereof; and the connecting rope is fixedly connected with the flow meter.
[0006] Preferably, the mesh number of the first drift net is smaller than that of the second drift net, and the mesh number of the second drift net is smaller than that of the third drift net.
[0007] Preferably, the connecting rope is fixedly connected with an upper spring buckle on the underside thereof, and the upper spring buckle passes through meshes of the first drift net, the second drift net and the third drift net.
[0008] Preferably, the lead sinker is fixedly connected with a lower spring buckle on the upside thereof, and the lower spring buckle passes through the meshes of the first drift net, the second drift net and the third drift net.
[0009] Preferably, the first drift net is detachably connected with the second drift net by a first Velcro, and the second drift net is detachably connected with the third drift net by a second Velcro.
[0010] The utility model has the following advantages. The survey is performed on the fishery resources by using the drift net and the flow meter, such that the problem that the fishery resources may not be quantitatively calculated by sampling with the drift net is solved. Moreover, a netting with different meshes is provided according to sizes of fish for respectively catching fish with specific sizes without catching other fish due to the adoption of a multilayer detachable drift net, such that the accidental catch is prevented and the impact on the fishery resources and the ecological environment is reduced.
[0011] In order to more clearly explain technical solutions in embodiments of the utility model or in the prior art, accompanying drawings required to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings in the following description are only one embodiment of the utility model. Those ordinarily skilled in the art may obtain other accompanying drawings according to the extension of the accompanying drawings provided herein without paying any creative efforts.
[0012] FIG. 1 is a schematic front view showing a structure of the utility model; and
[0013] FIG. 2 is a schematic side view showing a structure of the utility model.
[0014] The utility model will be further described below with reference to accompanying drawings and examples.
[0015] The embodiments of the utility model will be described in detail below, and examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and serve merely to explain, not to limit, the utility model.
[0016] In the description of the utility model, it should be noted that unless otherwise clearly specified and limited, the terms "install", "connect with", and "connect to" should be understood in a broad sense, for example, may be construed as a fixed connection or a detachable connection, or an integral connection; and may be a direct connection or an indirect connection via an intermediary. Those ordinarily skilled in the art may understand specific meanings of the above terms in the utility model depending on specific conditions.
[0017] As shown in FIG. 1 and FIG. 2, the utility model relates to a drift net capable of quantitatively calculating fishery resources. The drift net is characterized by including a first drift net 1, a second drift net 2, a third drift net 3, a float 4, a connecting rope 5, a flow meter 6 and a lead sinker 9, wherein the second drift net 2 is detachably connected with the first drift net 1 on one side and detachably connected with the third drift net 3 on the other side thereof; the float 4 is fixedly connected with the connecting rope 5 on the underside thereof; the connecting rope 5 is detachably connected with the first drift net 1, the second drift net 2 and the third drift net 3 on the underside thereof; the lead sinker 9 is detachably connected with the first drift net 1, the second drift net 2 and the third drift net 3 on the upside thereof; and the connecting rope 5 is fixedly connected with the flow meter 6.
[0018] Preferably, the mesh number of the first drift net 1 is smaller than that of the second drift net 2, and the mesh number of the second drift net 2 is smaller than that of the third drift net 3.
[0019] Preferably, the connecting rope 5 is fixedly connected with an upper spring buckle 7 on the underside thereof, and the upper spring buckle 7 passes through meshes of the first drift net 1, the second drift net 2 and the third drift net 3.
[0020] Preferably, the lead sinker 9 is fixedly connected with a lower spring buckle 8 on the upside thereof, and the lower spring buckle 8 passes through the meshes of the first drift net 1, the second drift net 2 and the third drift net 3.
[0021] Preferably, the first drift net 1 is detachably connected with the second drift net 2 by a first Velcro, and the second drift net 2 is detachably connected with the third drift net 3 by a second Velcro.
[0022] Preferably, the first Velcro includes a first loop fastener 11 and a first hook fastener 21. The second Velcro includes a second loop fastener 22 and a second hook fastener 31. The first loop fastener 11 is fixedly connected with the first drift net 1. The second drift net 2 is fixedly connected with the first hook fastener 21 on one side thereof and fixedly connected with the second loop fastener 22 on the other side thereof. The second hook fastener 31 is fixedly connected with the third drift net 3. There are corresponding Velcros fixedly connected with four sides of each of the first drift net 1, the second drift net 2 and the third drift net 3, respectively.
[0023] A working principle is described as follows.
[0024] When it is necessary to comprehensively survey the fishery resources, the first loop fastener 11 is fastened to the first hook fastener 21, and the second loop fastener 22 is fastened to the second hook fastener 31. Accordingly, the first drift net 1, the second drift net 2 and the third drift net 3 are fixed together, and then fixed with the upper spring buckle 7 and the lower spring buckle 8 through the meshes of all the drift nets, respectively.
[0025] When it is necessary to survey large-sized nektons, only the first drift net 1 is used, and then fixed with the upper spring buckle 7 and the lower spring buckle 8 are through the meshes of the first drift net 1, respectively. Preferably, sealing edges 12 are installed around the first drift net 1. When it is necessary to survey medium-sized nektons, only the second drift net 2 is used, and has the same principle as only using the first drift net 1. When it is necessary to survey small-sized nektons, only the third drift net 3 is used, and has the same principle as only using the first drift net 1.
[0026] When it is necessary to survey large and medium-sized nektons, only the first drift net 1 and the second drift net 2 are bonded together for use, and then fixed with the upper spring buckle 7 and the lower spring buckle 8 through the meshes of all the used drift nets, respectively. When it is necessary to survey small and medium-sized nektons, the second drift net 2 and the third drift net 3 are used, and have the same principle as above.
[0027] A D-Flow flow meter from Germany HYDRO-BIOS serves as the flow meter 6. It is determined that the meshes of the netting of the drift net are used according to the survey purpose. Before use, the flow meter 6 returns to zero, and the drift net capable of quantitatively calculating the fishery resources is spread and placed into a water body perpendicular to the water flow direction. The sampling time is set according to the general condition of the fishery resources in the water region, and should not be too long, generally no more than 48 hours. Catches on the nettings are collected, and classified and weighed respectively according to the species. The total amount of water passing through the drift net is calculated based on the count of the flow meter 6 and the area of the drift net. Finally, the amount of the fishery resources and the amount of resources of various species in the overall water region are estimated.
[0028] The utility model has been described above by way of examples, but the utility model is not limited to the specific embodiments described above, and any changes or modifications based on the utility model belong to the scope of protection of the utility model.
Claims (5)
1. A drift net capable of quantitatively calculating fishery resources, comprising a first drift net (1), a second drift net (2), a third drift net (3), a float (4), a connecting rope (5), a flow meter (6) and a lead sinker (9), wherein the second drift net (2) is detachably connected with the first drift net (1) on one side and detachably connected with the third drift net (3) on the other side thereof; the float (4) isfixedly connected with the connecting rope (5) on the underside thereof; the connecting rope (5) is detachably connected with the first drift net (1), the second drift net (2) and the third drift net (3) on the underside thereof; the lead sinker (9) is detachably connected with the first drift net (1), the second drift net (2) and the third drift net (3) on the upside thereof; and the connecting rope (5) is fixedly connected with the flow meter (6).
2. The drift net capable of quantitatively calculating fishery resources according to claim 1, wherein the mesh number of the first drift net (1) is smaller than that of the second drift net (2), and the mesh number of the second drift net (2) is smaller than that of the third drift net (3).
3. The drift net capable of quantitatively calculating fishery resources according to claim 1, wherein the connecting rope (5) is fixedly connected with an upper spring buckle (7) on the underside thereof, and the upper spring buckle (7) passes through meshes of the first drift net (1), the second drift net (2) and the third drift net (3).
4. The drift net capable of quantitatively calculating fishery resources according to claim 1, wherein the lead sinker (9) is fixedly connected with a lower spring buckle (8) on the upside thereof, and the lower spring buckle (8) passes through the meshes of the first drift net (1), the second drift net (2) and the third drift net (3).
5. The drift net capable of quantitatively calculating fishery resources according to claim 1, wherein the first drift net (1) is detachably connected with the second drift net (2) by a first Velcro, and the second drift net (2) is detachably connected with the third drift net (3) by a second Velcro.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922355752.0U CN211430685U (en) | 2019-12-25 | 2019-12-25 | Flow-pricking net capable of being used for quantitatively calculating fishery resources |
| CN2019223557520 | 2019-12-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2020101448A4 true AU2020101448A4 (en) | 2020-08-27 |
Family
ID=72146327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2020101448A Ceased AU2020101448A4 (en) | 2019-12-25 | 2020-07-22 | Drift net capable of quantitatively calculating fishery resources |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN211430685U (en) |
| AU (1) | AU2020101448A4 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113785800A (en) * | 2021-10-18 | 2021-12-14 | 中国科学院水生生物研究所 | Three-layer multi-mesh composite gill net device for investigating reservoir fish resources |
-
2019
- 2019-12-25 CN CN201922355752.0U patent/CN211430685U/en active Active
-
2020
- 2020-07-22 AU AU2020101448A patent/AU2020101448A4/en not_active Ceased
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| Publication number | Publication date |
|---|---|
| CN211430685U (en) | 2020-09-08 |
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| Date | Code | Title | Description |
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| FGI | Letters patent sealed or granted (innovation patent) | ||
| MK22 | Patent ceased section 143a(d), or expired - non payment of renewal fee or expiry |