CN108719165B - Fishing gear selective experiment sampling device and method - Google Patents
Fishing gear selective experiment sampling device and method Download PDFInfo
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- CN108719165B CN108719165B CN201810407562.6A CN201810407562A CN108719165B CN 108719165 B CN108719165 B CN 108719165B CN 201810407562 A CN201810407562 A CN 201810407562A CN 108719165 B CN108719165 B CN 108719165B
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- 238000005070 sampling Methods 0.000 title claims abstract description 94
- 238000002474 experimental method Methods 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims description 10
- 238000012216 screening Methods 0.000 claims abstract description 117
- 241000251468 Actinopterygii Species 0.000 claims abstract description 95
- 230000005484 gravity Effects 0.000 claims description 3
- 238000012935 Averaging Methods 0.000 description 8
- 238000012360 testing method Methods 0.000 description 7
- 241001596950 Larimichthys crocea Species 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 241000356842 Larimichthys polyactis Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000000366 juvenile effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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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
- A01K61/00—Culture of aquatic animals
- A01K61/90—Sorting, grading, counting or marking live aquatic animals, e.g. sex determination
- A01K61/95—Sorting, grading, counting or marking live aquatic animals, e.g. sex determination specially adapted for fish
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- Environmental Sciences (AREA)
- Marine Sciences & Fisheries (AREA)
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- Biodiversity & Conservation Biology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a fishing gear selectivity experiment sampling device, which comprises a fish seed screening cylinder, a plurality of screening nets, a fish catch collator, a baffle plate and an experiment sampling cylinder, wherein the screening nets are arranged in the fish seed screening cylinder from top to bottom; the upper part of the experiment sampling cylinder is provided with an opening, a plurality of vertically extending sampling uniform boxes are arranged in the experiment sampling cylinder, and the upper end of each sampling uniform box is provided with an opening; the mesh size of each screening net reduces from top to bottom in proper order, and each screening net all can be opened along the fish species cylinder inner wall, and the baffle can be taken out along the bottom surface of fish species cylinder. The invention has the characteristics of effectively screening target fish species, facilitating uniform sampling and effectively saving space.
Description
Technical Field
The invention relates to the technical field of marine fishery, in particular to a fishery selective experimental sampling device and method capable of effectively screening target fish species, facilitating uniform sampling and effectively saving space.
Background
China is rich in marine fishery resources, and the characteristics of the marine fishery resources also determine various fishing modes in China, such as trawling, net stretching, gill net and other operation modes, but the marine fishery resources in China are seriously damaged because the mesh size of the marine fishery resources is small and a large number of juvenile fishes are captured. With the continuous emphasis on fishery resources in China, selective research on fishing gear is gradually increased, and the purpose is to determine the mesh size of each type of fishing gear through experiments and evaluate the yield loss condition. The selectivity test generally employs distinguishing mesh size from suitability of fishery resources based on weight and quantity of the fishery catch, while determining a minimum mesh size to accommodate the netting gear based on size of the primary fishery catch.
In the selectivity test of the cover net, the important factor that decides the success or failure of the selectivity test is the problem of sampling, and the proportion of sampling is the most loaded down with trivial details difficult problem in the selectivity test implementation process, and current sieving mechanism relies on the continuous screen cloth of changing of manpower, extravagant manpower, and space resource occupies great. Reasonable sampling in the selectivity test has influence on analyzing the results of the selectivity test of the fishing gear, evaluating yield loss and difference between nets. Therefore, the invention provides a sampling device and a sampling method aiming at the selective sampling problem so as to provide certain scientific guidance for the selective test sampling problem.
Disclosure of Invention
The invention aims to overcome the defects that the accurate sampling cannot be realized, the screening and sampling device occupies a large space and wastes manpower in the prior art, and provides a fishery selective experimental sampling device and method which can effectively screen target fish species, are convenient for uniform sampling and effectively save space.
In order to achieve the purpose, the invention adopts the following technical scheme:
a fishing gear selectivity experiment sampling device comprises a fish seed screening cylinder, a plurality of screening nets which are arranged in the fish seed screening cylinder from top to bottom in sequence, a catch finishing device arranged in the fish seed screening cylinder, a baffle plate arranged at the bottom of the fish seed screening cylinder and an experiment sampling cylinder arranged at the lower part of the fish seed screening cylinder; the upper part of the experiment sampling cylinder is provided with an opening, a plurality of vertically extending sampling uniform boxes are arranged in the experiment sampling cylinder, and the upper end of each sampling uniform box is provided with an opening; the mesh size of each screening net reduces from top to bottom in proper order, and each screening net all can be opened along the fish species cylinder inner wall, and the baffle can be taken out along the bottom surface of fish species cylinder.
The invention relates to a device for selective experimental sampling of fishing gear, which screens fish seeds in a fish seed screening cylinder; selecting a screening net according to the size of a target fish species, selecting a sampling averaging box according to the averaging proportion of sampling, and putting the sampling averaging box into an experimental sampling cylinder, wherein the experimental sample is a fish species sample to be sampled after being filtered by the screening net, and the fish catch collator is used for flattening the fish species sample to be sampled so as to prevent the fish species sample from being unevenly distributed in the fish species screening cylinder to influence the sampling; the baffle of screening bobbin base portion with the fish species is taken out, and the fish species sample that needs the sampling gets into the sample and equally divides the box, then has carried out the fish species sample that needs the sampling and has equallyd divide.
Preferably, each screen is divided into 4 parts, and the rotating shafts are arranged on the edges of the parts contacting with the inner wall of the fish seed screening cylinder. Each screening net can be opened along the rotating shaft, and because each screening net is opened or closed in the cylinder, the space is saved, and the screening nets are not required to be replaced layer by manpower.
Preferably, the fish seed screening cylinder is in a funnel-shaped cylindrical shape, the screening net at the uppermost end of the fish seed screening cylinder is a planar screening net, and the rest screening nets are all arch-shaped screening nets; when the arched screening net is opened, all parts of the arched screening net can be attached to the inner wall of the fish seed screening cylinder. Because the fish species screen cylinder is for leaking hopper-shaped cylinder, the lateral wall of fish species screen cylinder is circular-arc, therefore the inside screening net of fish species screen cylinder is the bellied arch that makes progress in the middle part, and when opening, the inner wall of fish species screen cylinder can be laminated to each part of arched screening net, saves the inside space of fish species screen cylinder.
Preferably, the catch finishing device comprises an oblique rotating wheel, the lower part of the oblique rotating wheel is provided with a connecting rod connected with the oblique rotating wheel, and the lower part of the connecting rod is provided with a horizontal rotating wheel connected with the connecting rod; the oblique rotating wheel and the horizontal rotating wheel are fixed in the fish seed screening cylinder through fixing rods. The oblique runner drives the connecting rod to rotate, and the connecting rod drives the horizontal runner to rotate.
Preferably, the oblique runner comprises a plurality of rotating blades, the horizontal runner comprises a plurality of sorting blades, and the size of the rotating blades is larger than that of the sorting blades. The rotating blade is used for driving the whole fishing device to rotate, and the arranging blade is used for flatly arranging the fish sample in the fish seed screening cylinder.
Preferably, the cross section of each sampling and equally dividing box is fan-shaped, and the cross section of the structure formed by combining the sampling and equally dividing boxes is circular. The radius of each sampling halving box is equal to that of the experimental sampling cylinder.
A method of a device based on fishing gear selective experimental sampling comprises the following steps:
(7-1) selecting a target fish species by an operator, selecting a screening net suitable for the target fish species by the operator, and selecting a sampling and evenly dividing box according to an experimental sampling proportion;
(7-2) opening other screening nets by an operator, enabling the other screening nets to be attached to the inner wall of the fish seed screening cylinder, and placing each sampling uniform box into the experimental sampling cylinder by the operator;
(7-3) an operator pours the experimental sample into the fish seed screening cylinder, and the inclined rotating wheel rotates under the action of the gravity of the experimental sample and drives the horizontal rotating wheel to rotate;
(7-4) enabling the target fish species in the experimental sample to enter the bottom of the fish species screening cylinder through the screening net, and leveling the target fish species by rotating the horizontal rotating wheel;
(7-5) after the screening is finished, an operator draws out the baffle at the bottom of the fish seed screening barrel, the target fish seeds fall into each sampling uniform box, and the operator selects one or more sampling uniform boxes according to the experimental sampling proportion to finish the sampling.
Therefore, the invention has the following beneficial effects: the method comprises the steps of screening fingerlings in a fingerling screening cylinder, selecting a screening net according to a target fingerling, selecting a sampling and averaging box according to an averaging proportion of the sampling, and placing the sampling and averaging box into an experimental sampling cylinder, wherein the experimental sample is filtered out through the screening net to obtain a fingerling sample to be sampled; the screening net in the fish seed screening cylinder is arched and can be tightly attached to the inner wall of the fish seed screening cylinder when opened, so that the space in the cylinder is saved; the catch collator is used for flattening the fish species sample to be sampled so as to prevent the fish species sample from being unevenly distributed in the fish species screening cylinder to influence sampling; the corresponding sampling uniform distribution box is selected according to the experimental sampling proportion, so that the accuracy of the sampling proportion is ensured.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a schematic diagram of a construction of an experimental sample cylinder according to the present invention.
In the figure: the fish kind filter cylinder 1, the screen cloth 2, the fish catch reorganizer 3, baffle 4, experiment sampler barrel 5, the equal box 6 that divides of sample, rotation axis 7, slant runner 8, connecting rod 9, horizontal runner 10, dead lever 11, rotating vane 12, arrangement blade 13.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
The embodiment shown in fig. 1 is a device for selective experimental sampling of fishing gear, which comprises a fish seed screening cylinder 1, a plurality of screening nets 2 arranged in the fish seed screening cylinder from top to bottom in sequence, a fish catch finishing device 3 arranged in the fish seed screening cylinder, a baffle 4 arranged at the bottom of the fish seed screening cylinder and an experimental sampling cylinder 5 arranged at the lower part of the fish seed screening cylinder; the upper part of the experiment sampling cylinder is provided with an opening, a plurality of sampling uniform boxes 6 which extend vertically are arranged in the experiment sampling cylinder, and the upper end of each sampling uniform box is provided with an opening; the mesh size of each screening net reduces from top to bottom in proper order, and each screening net all can be opened along the fish species cylinder inner wall, and the baffle can be taken out along the bottom surface of fish species cylinder. Each screen mesh is divided into 4 parts equally, and the edges of each part contacting with the inner wall of the fish seed screening cylinder are provided with rotating shafts 7. The fish seed screening cylinder is in a funnel-shaped cylindrical shape, the screening net at the uppermost end of the fish seed screening cylinder is a planar screening net, and the rest screening nets are arched screening nets; when the arched screening net is opened, all parts of the arched screening net can be attached to the inner wall of the fish seed screening cylinder. The fishing catch finishing device comprises an oblique rotating wheel 8, the lower part of the oblique rotating wheel is provided with a connecting rod 9 connected with the oblique rotating wheel, and the lower part of the connecting rod is provided with a horizontal rotating wheel 10 connected with the connecting rod; the oblique rotating wheel and the horizontal rotating wheel are fixed in the fish seed screening cylinder through a fixing rod 11. The oblique runner includes a plurality of rotating blade 12, and the horizontal runner includes a plurality of arrangement blade 13, rotating blade's size is greater than arrangement blade's size.
As shown in fig. 2, the cross section of each sampling averaging box is fan-shaped, and the cross section of the combined structure of the sampling averaging boxes is circular.
The method of the fishing gear selective experimental sampling device shown in figure 1 comprises the following steps:
(7-1) selecting a target fish species as a small yellow croaker by an operator, selecting a screening net suitable for the target fish species, wherein the mesh size is 60mm, and selecting 1/4 samples according to an experimental sampling ratio of 1: 4 to divide into 4 boxes;
(7-2) opening the screening nets with other mesh sizes by an operator, enabling the other screening nets to be attached to the inner wall of the fish seed screening cylinder, folding the screening nets with the mesh size of 60mm for filtering the little yellow croakers, and placing each sampling average box into an experimental sampling cylinder by the operator;
(7-3) an operator pours the experimental sample into the fish seed screening cylinder, and the inclined rotating wheel rotates under the action of the gravity of the experimental sample and drives the horizontal rotating wheel to rotate;
(7-4) enabling the target fingerling small yellow croakers in the experimental sample to enter the bottom of the fingerling screening barrel through the screening net, and leveling the target fingerling small yellow croakers by rotating the horizontal rotating wheel so that the small yellow croakers are uniformly placed at the bottom of the fingerling screening barrel;
(7-5) after the screening is finished, an operator draws out the baffle at the bottom of the fish species screening barrel, the target fish species yellow croaker falls into each sampling uniform box, and the operator selects one sampling uniform box according to the experimental sampling proportion to finish the sampling.
It should be understood that this example is for illustrative purposes only and is not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Claims (6)
1. A fishing gear selectivity experiment sampling device is characterized by comprising a fish seed screening cylinder (1), a plurality of screening nets (2) which are arranged in the fish seed screening cylinder from top to bottom in sequence, a catch finishing device (3) which is arranged in the fish seed screening cylinder, a baffle (4) which is arranged at the bottom of the fish seed screening cylinder and an experiment sampling cylinder (5) which is arranged at the lower part of the fish seed screening cylinder; the upper part of the experiment sampling cylinder is provided with an opening, a plurality of vertically extending sampling uniform boxes (6) are arranged in the experiment sampling cylinder, and the upper end of each sampling uniform box is provided with an opening; the mesh size of each screening net is sequentially reduced from top to bottom, each screening net can be opened along the inner wall of the fish seed screening cylinder, and the baffle can be pulled out along the bottom surface of the fish seed screening cylinder; each screening net is divided into 4 parts equally, and the edges of each part contacting with the inner wall of the fish seed screening cylinder are provided with rotating shafts (7).
2. The fishing gear selectivity experiment sampling device according to claim 1, wherein the fish seed screening cylinder is in a funnel-shaped cylindrical shape, the screening net at the uppermost end of the fish seed screening cylinder is a planar screening net, and the rest screening nets are all arch-shaped screening nets; when the arched screening net is opened, all parts of the arched screening net can be attached to the inner wall of the fish seed screening cylinder.
3. The fishing gear selective experimental sampling device according to claim 1, wherein the catch organizer comprises an inclined runner (8), a connecting rod (9) connected with the inclined runner is arranged at the lower part of the inclined runner, and a horizontal runner (10) connected with the connecting rod is arranged at the lower part of the connecting rod; the oblique rotating wheel and the horizontal rotating wheel are fixed in the fish seed screening cylinder through a fixing rod (11).
4. A fishing gear selective laboratory sampling device according to claim 3, characterized in that the diagonal wheel comprises a number of rotating blades (12) and the horizontal wheel comprises a number of collating blades (13), the size of said rotating blades being larger than the size of said collating blades.
5. The fishing gear selective experimental sampling device according to claim 1, wherein the cross section of each sampling distribution box is fan-shaped, and the cross section of the combined structure of the sampling distribution boxes is circular.
6. A method for selective experimental sampling of fishing gear based on the device of claim 1, characterized by comprising the following steps: (6-1) selecting a target fish species by an operator, selecting a screening net suitable for the target fish species by the operator, and selecting a sampling and evenly dividing box according to an experimental sampling proportion; (6-2) opening other screening nets by an operator, enabling the other screening nets to be attached to the inner wall of the fish seed screening cylinder, and placing each sampling average box into the experimental sampling cylinder by the operator; (6-3) an operator pours the experimental sample into the fish seed screening cylinder, and the inclined rotating wheel rotates under the action of the gravity of the experimental sample and drives the horizontal rotating wheel to rotate; (6-4) enabling the target fish species in the experimental sample to enter the bottom of the fish species screening cylinder through the screening net, and leveling the target fish species by rotating the horizontal rotating wheel; (6-5) after the screening is finished, an operator draws out the baffle at the bottom of the fish seed screening barrel, the target fish seeds fall into each sampling uniform box, and the operator selects one or more sampling uniform boxes according to the experimental sampling proportion to finish the sampling.
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CN114051964B (en) * | 2021-11-15 | 2022-11-08 | 中国水产科学研究院淡水渔业研究中心 | Perch micropterus salmoides fry screening system and method |
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CN106719481A (en) * | 2016-12-06 | 2017-05-31 | 浙江省海洋水产研究所 | A kind of Eco-friendly Trawl gear Choice tests device |
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2018
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Patent Citations (10)
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SU1147310A1 (en) * | 1982-09-03 | 1985-03-30 | Полярный научно-исследовательский институт морского рыбного хозяйства и океанографии им.Н.М.Книповича | Apparatus for determining selectivity of trawl |
WO2009136797A1 (en) * | 2008-05-06 | 2009-11-12 | Calanus As | Trawl |
CN201585346U (en) * | 2009-11-20 | 2010-09-22 | 浙江省海洋水产研究所 | Selective crab pot fishing tackle |
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