CN102657108A - Device and method for detecting central shrimp fishing ground - Google Patents
Device and method for detecting central shrimp fishing ground Download PDFInfo
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- CN102657108A CN102657108A CN2012100939538A CN201210093953A CN102657108A CN 102657108 A CN102657108 A CN 102657108A CN 2012100939538 A CN2012100939538 A CN 2012100939538A CN 201210093953 A CN201210093953 A CN 201210093953A CN 102657108 A CN102657108 A CN 102657108A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
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Abstract
The invention relates to a device and a method for detecting a central shrimp fishing ground. The device comprises a sampling net and expanders. The expanders are respectively connected to two sides of the rear end of the sampling net through legs. The other end of each expander is connected with a branch chain. The other end of every branch chain is connected with a steel warp. The other end of the steel warp is connected with a winch on a fishing vessel. The method includes: casting the sampling net near the fishing ground to obtain a sample, casting nets for production after high-density shrimp population is located, continuing using the sampling net to obtain samples during production, and sequentially adjusting the running direction of the fishing vessel to gradually approach a central shrimp fishing ground. By the aid of the device and the method, density of the shrimp population can be confirmed before the net is cast from the fishing vessel so that net casting and production are determined, and in addition, density of the shrimp population can be known anytime during net casting and towing, and accordingly change of the towing direction of the fishing vessel can be determined. The device is convenient to operate, can be operated by a single person, is reasonable and simple in structure, low in cost and high in applicability, and has broad application prospect.
Description
Technical field
The invention belongs to the shrimping technical field, particularly relate to a kind of device and method of surveying fishing ground, shoal of shrimps center.
Background technology
All there are shrimps in a lot of waters of world ocean, and its economic worth is occupied critical role in fishery.Using different Fishing Gear and Fishing Method in China's ocean shrimp fishery, wherein most typical is shrimp trawlnet (comprise singly drag, twoly drag, drag the purlin and the double bracket trawlnet).Grasp to the fishing ground, center in the shrimp trawling is most important for enhancing productivity, and the grasp in fishing ground, center at present is mainly according to the produced on-site situation with to the monitoring and the analysis of the fishing ground environment factor.China's fishing boat current detecting during shoal of shrimps main means be to use " fish detector "; Reflection according to being shown is judged; But because shoal of shrimps is generally lived in bottom or lain prone in the seabed, add other interfere information, Effect on Detecting is very poor; Cause shrimps production captain when confirming the circuit of towing, can only judge, thereby increased the waste of the blindness of pulling and production time, resource according to own experience with reference to the trend of his ship.Because the decline of marine resources and the biological habit of shrimps; Shoal of shrimps often only is gathered into very little a group in the shrimp fishing ground; Have only and pull circuit accurately and just high yield can be arranged, inaccurate like the towing place, small place difference will make output differ greatly even not have output fully.
Summary of the invention
Technical problem to be solved by this invention provides a kind of device and method of surveying fishing ground, shoal of shrimps center; Can put the density of confirming shoal of shrimps before net is produced at fishing boat; So that whether decision will put net production; And in the process of putting the net towing, can understand the density of shoal of shrimps at any time, so that whether the decision fishing boat need change tow direction.
The technical solution adopted for the present invention to solve the technical problems is: a kind of device of surveying fishing ground, shoal of shrimps center is provided; Comprise sampling network, expander; Both sides, described sampling network rear end connect expander through empty guiding principle respectively; Described two expander other ends connect side chain respectively, and guiding principle is draged in described side chain other end connection, and the described guiding principle other end that drags connects the winch on the fishing boat; Described sampling network comprises sampling network main body, headline, infraclass; Described sampling network main body is a pocket-like, is combined by net capsule, upper net plate, lower net plate, side net sheet, and described net capsule is the hollow circle tube of end opening other end sealing; Openend connects upper net plate, lower net plate and two side net sheets; Described upper net plate rear end is provided with headline along the edge, and with some floats, described lower net plate rear end is provided with infraclass along the edge on the described headline; Described expander comprises panel, drags iron, drags the guiding principle frame, empty guiding principle junction button, and described panel is the rectangular slab of fillet for the front end downside, and described panel downside is fixed with and drags iron; The described fillet of iron front end and panel front end downside that drags matches; Described panel centre position is parallel to long limit and has finedraw, and described panel front portion is provided with drags the guiding principle frame, and the described guiding principle frame that drags is fixed on the anterior both sides up and down of panel through two block pressur plates; And can be the axis rotation along the line of two block pressur plates; The described guiding principle frame front end that drags connects side chain, and described panel rear is provided with sky guiding principle junction button, and described empty guiding principle junction button is " U " shape; Two ends are the both sides up and down of joint face postlaminar part respectively, and described empty guiding principle junction button connects empty guiding principle.
Described sampling network main body adopts polyethylene 21 strands to process, and mesh size is 50mm; Described net capsule is by long 28 orders, and wide 44 purpose rectangle net sheets are coiled into cylindrical shape; Described upper net plate is made up of the trapezoidal net sheet of centre and two network of triangle sheets of both sides, and trapezoidal net sheet broadside is 40 orders, and narrow limit is 8 orders, high 32 orders, triangulation network sheet bottom side length 12 orders, high 20 orders; Described lower net plate is made up of the trapezoidal net sheet of centre and two network of triangle sheets of both sides, and trapezoidal net sheet broadside is 40 orders, and narrow limit is 16 orders, high 24 orders, triangulation network sheet bottom side length 14 orders, high 21 orders; Described side netting length is 56 orders, and width is 8 orders; Described headline is the polyethylene rope of diameter 8mm, and described infraclass is the iron chains of length 4.1m, diameter 6mm.
Described some float gross buoyancies are the half the of the suffered gravity of sampling network.
Described panel is long 600mm, wide 300mm, the steel plate of thick 5mm; The described iron that drags is by long 700mm, wide 80mm, and the steel plate of thick 10mm curves.
Described mode of dragging Tie Tong to cross welding is fixed on the panel downside.
Described finedraw front end below is a chamfering.
The described guiding principle frame that drags adopts the round steel of diameter 10mm to curve.
A kind of method of surveying fishing ground, shoal of shrimps center comprises the following steps:
(1) after fishing boat arrives near the fishing ground, uses fish detector tentatively to survey the shoal of shrimps approximate location, put down sampling network and sample;
(2) pack up sampling network and to wherein shrimp counting; Confirm whether to have the density of shrimps and judgement shoal of shrimps; If there is not the shrimp quantity subcritical value in shrimps or the sampling network, then fishing boat is moved resampling behind the certain distance, the shrimp quantity in sampling network is greater than critical value;
(3) find and put net production behind the bigger position of shoal of shrimps density;
(4) continue in the production process to use sampling network to sample, if find that shrimps quantity reduces to below the critical value in the sampling network, then with the fishing boat tune, toward continuing towing in the other direction;
(5) continue to use sampling network to sample, up to finding that again shrimps quantity reduces to below the critical value in the sampling network;
(6) the towing time of comparison both direction, judge the shoal of shrimps center.
In the described step 1,4,5, each sampling time of sampling network is 10 minutes, packs up sampling network at every turn and also accomplishes behind the counting of the shrimp in the sampling network, puts down sampling network immediately and samples next time.
Beneficial effect
The present invention can be put the density of confirming shoal of shrimps before net is produced at fishing boat; So that whether decision will put net production, and in the process of putting the net towing, can understand the density of shoal of shrimps at any time, so that whether the decision fishing boat need change tow direction; Easy to operate; Can be single independent operation use, rational in infrastructure and succinct, cost is low, practical, have broad application prospects.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a sampling network structural representation of the present invention;
Fig. 3 respectively nets sheet for sampling network of the present invention and launches sketch map;
Fig. 4 is an expander structural representation of the present invention;
1. fishing boat 2. winches 3. drag empty guiding principle 7. sampling networks of guiding principle 4. side chains 5. expanders 6. 8. net capsules 9. upper net plates 10. lower net plates 11. 12. infraclasses, 13. side net sheets, 14. floats, 15. panels 16. of raising to the higher plane of principle and drag iron 17. finedraws 18. to drag guiding principle frame 19. empty guiding principle junction buttons
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in the restriction scope of the present invention.Should be understood that in addition those skilled in the art can do various changes or modification to the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Like Fig. 1～shown in Figure 4; A kind of device of surveying fishing ground, shoal of shrimps center of the present invention; Comprise sampling network 7, expander 5, both sides, described sampling network 7 rear end connect expander 5 through empty guiding principle 6 respectively, and described two expander 5 other ends connect side chain 4 respectively; Guiding principle 3 is draged in described side chain 4 other ends connection, and described guiding principle 3 other ends that drag connect the winch 2 on the fishing boat 1; Described sampling network 7 comprises sampling network main body, headline 11, infraclass 12; Described sampling network main body is a pocket-like, is combined by net capsule 8, upper net plate 9, lower net plate 10, side net sheet 13, and described net capsule 8 is the hollow circle tube of end opening other end sealing; Openend connects upper net plate 9, lower net plate 10 and two side net sheets 13; Described upper net plate 9 rear ends are provided with along the edge raises to the higher plane of principle 11, and with some floats 14, described lower net plate 10 rear ends are provided with infraclass 12 along the edge on the described headline 11; Described expander 5 comprises panel 15, drags iron 16, drags guiding principle frame 18, empty guiding principle junction button 19, and described panel 15 is the rectangular slab of fillet for the front end downside, and described panel 15 downsides are fixed with and drag iron 16; The described fillet of iron 16 front ends and panel 15 front end downsides that drags matches; Described panel 15 centre positions are parallel to long limit and have finedraw 17, and described panel 15 front portions are provided with drags guiding principle frame 18, and the described guiding principle frame 18 that drags is fixed on the anterior both sides up and down of panel 15 through two block pressur plates; And can be the axis rotation along the line of two block pressur plates; Described guiding principle frame 18 front ends that drag connect side chain 4, and described panel 15 rear portions are provided with sky guiding principle junction button 19, and described empty guiding principle junction button 19 is " U " shape; Two ends connect the both sides up and down at panel 15 rear portions respectively, and described empty guiding principle junction button 19 connects empty guiding principle 6.
Described sampling network main body adopts polyethylene 21 strands to process, and mesh size is 50mm; Described net capsule 8 is by long 28 orders, and wide 44 purpose rectangle net sheets are coiled into cylindrical shape; Described upper net plate 9 is made up of the trapezoidal net sheet of centre and two network of triangle sheets of both sides, and trapezoidal net sheet broadside is 40 orders, and narrow limit is 8 orders, high 32 orders, triangulation network sheet bottom side length 12 orders, high 20 orders; Described lower net plate 10 is made up of the trapezoidal net sheet of centre and two network of triangle sheets of both sides, and trapezoidal net sheet broadside is 40 orders, and narrow limit is 16 orders, high 24 orders, triangulation network sheet bottom side length 14 orders, high 21 orders; Described side net sheet 13 length are 56 orders, and width is 8 orders; Described headline 11 is the polyethylene rope of diameter 8mm, and described infraclass 12 is the iron chains of length 4.1m, diameter 6mm.
Described some floats 14 gross buoyancies are the half the of sampling network 7 suffered gravity.
Described panel 15 is long 600mm, wide 300mm, the steel plate of thick 5mm; The described iron 16 that drags is by long 700mm, wide 80mm, and the steel plate of thick 10mm curves.
The described iron 16 that drags is fixed on panel 15 downsides through the mode of welding.
Described finedraw 17 front ends below is a chamfering.
The described guiding principle frame 18 that drags adopts the round steel of diameter 10mm to curve.
A kind of method of surveying fishing ground, shoal of shrimps center comprises the following steps:
(1) after near the fishing boat 1 arrival fishing ground, uses fish detector tentatively to survey the shoal of shrimps approximate location, put down sampling network 7 and sample;
(2) pack up sampling network 7 and to wherein shrimp counting; Confirm whether to have the density of shrimps and judgement shoal of shrimps; If there is not the shrimp quantity subcritical value in shrimps or the sampling network 7, then fishing boat 1 is moved resampling behind the certain distance, the shrimp quantity in sampling network 7 is greater than critical value;
(3) find and put net production behind the bigger position of shoal of shrimps density;
(4) continue in the production process to use sampling network 7 to sample, if find that shrimps quantity reduces to below the critical value in the sampling network 7, then with fishing boat 1 tune, toward continuing towing in the other direction;
(5) continue to use sampling network 7 to sample, shrimps quantity reduces to below the critical value in finding sampling network 7 again;
(6) the towing time of comparison both direction, judge the shoal of shrimps center.
In the described step 1,4,5,7 each sampling times of sampling network are 10 minutes, pack up sampling network 7 at every turn and also accomplish behind the counting of the shrimps in the sampling network 7, put down sampling network 7 immediately and sample next time.
Sampling network 7 provided by the invention is sewed up through cutting out after and is formed by five net sheets, certain buoyancy, the power of sinking of outfit on guiding principle 11, the infraclass 12 above that, make its in water, keep certain upper and lower to tension force;
Sampling network 7 net capsules 8 are the hollow circle tube of end opening other end sealing, and openend is connected to the netting gear below, and the other end tightens up when sampling, can open after the hauling and emit sample;
The effect of expander 5 is to make netting gear when towing, keep opening of horizontal direction;
Expander 5 panels 15 downsides are fixed with and drag iron 16, and the effect of dragging iron 16 is for expander 5 when pulling smoothly contacts with the seabed, and can cross some less barriers;
Power operated winch 2 is used for receiving and unclasping through strand draging guiding principle 3 and playing, put netting gear.
Claims (9)
1. device of surveying fishing ground, shoal of shrimps center; Comprise sampling network (7), expander (5); It is characterized in that: described sampling network (7) both sides, rear end connect expander (5) through empty guiding principle (6) respectively; Described two expanders (5) other end connects side chain (4) respectively, and guiding principle (3) is draged in the connection of described side chain (4) other end, and described guiding principle (3) other end that drags connects the winch (2) on the fishing boat (1); Described sampling network (7) comprises sampling network main body, headline (11), infraclass (12); Described sampling network main body is a pocket-like; Combine by net capsule (8), upper net plate (9), lower net plate (10), side net sheet (13); Described net capsule (8) is the hollow circle tube of end opening other end sealing, and openend connects upper net plate (9), lower net plate (10) and two side net sheets (13), and described upper net plate (9) rear end is provided with headline (11) along the edge; Described headline (11) is gone up with some floats (14), and described lower net plate (10) rear end is provided with infraclass (12) along the edge; Described expander (5) comprises panel (15), drags iron (16), drags guiding principle frame (18), empty guiding principle junction button (19); Described panel (15) is the rectangular slab of fillet for the front end downside; Described panel (15) downside is fixed with and drags iron (16), and the described fillet of iron (16) front end and panel (15) front end downside that drags matches, and described panel (15) centre position is parallel to long limit and has finedraw (17); Described panel (15) front portion is provided with drags guiding principle frame (18); The described guiding principle frame (18) that drags is fixed on the anterior both sides up and down of panel (15) through two block pressur plates, and can be the axis rotation along the line of two block pressur plates, and described guiding principle frame (18) front end that drags connects side chain (4); Described panel (15) rear portion is provided with sky guiding principle junction button (19); Described empty guiding principle junction button (19) is " U " shape, and two ends connect the both sides up and down at panel (15) rear portion respectively, and described empty guiding principle junction button (19) connects empty guiding principle (6).
2. a kind of device of surveying fishing ground, shoal of shrimps center as claimed in claim 1 is characterized in that: described sampling network main body adopts polyethylene 21 strands to process, and mesh size is 50mm; Described net capsule (8) is by long 28 orders, and wide 44 purpose rectangle net sheets are coiled into cylindrical shape; Described upper net plate (9) is made up of the trapezoidal net sheet of centre and two network of triangle sheets of both sides, and trapezoidal net sheet broadside is 40 orders, and narrow limit is 8 orders, high 32 orders, triangulation network sheet bottom side length 12 orders, high 20 orders; Described lower net plate (10) is made up of the trapezoidal net sheet of centre and two network of triangle sheets of both sides, and trapezoidal net sheet broadside is 40 orders, and narrow limit is 16 orders, high 24 orders, triangulation network sheet bottom side length 14 orders, high 21 orders; Described side net sheet (13) length is 56 orders, and width is 8 orders; Described headline (11) is the polyethylene rope of diameter 8mm, and described infraclass (12) is the iron chains of length 4.1m, diameter 6mm.
3. a kind of device of surveying fishing ground, shoal of shrimps center as claimed in claim 1 is characterized in that: described some floats (14) gross buoyancy is the half the of the suffered gravity of sampling network (7).
4. a kind of device of surveying fishing ground, shoal of shrimps center as claimed in claim 1 is characterized in that: described panel (15) is long 600mm, wide 300mm, the steel plate of thick 5mm; The described iron (16) that drags is by long 700mm, wide 80mm, and the steel plate of thick 10mm curves.
5. a kind of device of surveying fishing ground, shoal of shrimps center as claimed in claim 1 is characterized in that: the described iron (16) that drags is fixed on panel (15) downside through the mode of welding.
6. a kind of device of surveying fishing ground, shoal of shrimps center as claimed in claim 1 is characterized in that: described finedraw (17) front end below is chamfering.
7. a kind of device of surveying fishing ground, shoal of shrimps center as claimed in claim 1 is characterized in that: the described guiding principle frame (18) that drags adopts the round steel of diameter 10mm to curve.
8. a method of surveying fishing ground, shoal of shrimps center is used a kind of device of surveying fishing ground, shoal of shrimps center as claimed in claim 1, it is characterized in that, comprises the following steps:
(1) after fishing boat (1) arrives near the fishing ground, uses fish detector tentatively to survey the shoal of shrimps approximate location, put down sampling network (7) and sample;
(2) pack up sampling network (7) and to wherein shrimp counting; Confirm whether to have the density of shrimps and judgement shoal of shrimps; If there is not the shrimp quantity subcritical value in shrimps or the sampling network (7), then with resampling behind the mobile certain distance of fishing boat (1), the shrimp quantity in sampling network (7) is greater than critical value;
(3) find and put net production behind the bigger position of shoal of shrimps density;
(4) continue in the production process to use sampling network (7) to sample, reduce to below the critical value, then with fishing boat (1) tune, toward continuing towing in the other direction if find the interior shrimps quantity of sampling network (7);
(5) continue to use sampling network (7) to sample, shrimps quantity reduces to below the critical value in finding sampling network (7) again;
(6) the towing time of comparison both direction, judge the shoal of shrimps center.
9. a kind of method of surveying fishing ground, shoal of shrimps center as claimed in claim 8; It is characterized in that: in the described step 1,4,5; Each sampling time of sampling network (7) is 10 minutes; Pack up sampling network (7) at every turn and also accomplish, put down sampling network (7) immediately and sample next time behind the counting of the shrimp in the sampling network (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100939538A CN102657108A (en) | 2012-04-01 | 2012-04-01 | Device and method for detecting central shrimp fishing ground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100939538A CN102657108A (en) | 2012-04-01 | 2012-04-01 | Device and method for detecting central shrimp fishing ground |
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| Publication Number | Publication Date |
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| CN102657108A true CN102657108A (en) | 2012-09-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN2012100939538A Pending CN102657108A (en) | 2012-04-01 | 2012-04-01 | Device and method for detecting central shrimp fishing ground |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106922634A (en) * | 2017-04-11 | 2017-07-07 | 中国水产科学研究院东海水产研究所 | A kind of abyssal benthos sampling network |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB772885A (en) * | 1955-05-04 | 1957-04-17 | John William Phillips | Improvements relating to trawl boards |
| DE19755991A1 (en) * | 1997-12-17 | 1999-06-24 | Jens Jensen | Trawling net arrangement for catching crabs |
| KR20030045898A (en) * | 2001-12-03 | 2003-06-12 | 대한민국(관리부서:국립수산과학원) | Fishing gear with escaping equipment for small fish |
| CN2671338Y (en) * | 2003-12-29 | 2005-01-19 | 中国水产科学研究院东海水产研究所 | Double boat surface and middle layer rope trawl |
| CN1781367A (en) * | 2004-12-03 | 2006-06-07 | 中国水产科学研究院东海水产研究所 | Single dragging rope self expanding type single ship middle layer dragnet |
| CN2819792Y (en) * | 2005-08-26 | 2006-09-27 | 中国水产科学研究院东海水产研究所 | Parallel shrimp trawl net |
-
2012
- 2012-04-01 CN CN2012100939538A patent/CN102657108A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB772885A (en) * | 1955-05-04 | 1957-04-17 | John William Phillips | Improvements relating to trawl boards |
| DE19755991A1 (en) * | 1997-12-17 | 1999-06-24 | Jens Jensen | Trawling net arrangement for catching crabs |
| KR20030045898A (en) * | 2001-12-03 | 2003-06-12 | 대한민국(관리부서:국립수산과학원) | Fishing gear with escaping equipment for small fish |
| CN2671338Y (en) * | 2003-12-29 | 2005-01-19 | 中国水产科学研究院东海水产研究所 | Double boat surface and middle layer rope trawl |
| CN1781367A (en) * | 2004-12-03 | 2006-06-07 | 中国水产科学研究院东海水产研究所 | Single dragging rope self expanding type single ship middle layer dragnet |
| CN2819792Y (en) * | 2005-08-26 | 2006-09-27 | 中国水产科学研究院东海水产研究所 | Parallel shrimp trawl net |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106922634A (en) * | 2017-04-11 | 2017-07-07 | 中国水产科学研究院东海水产研究所 | A kind of abyssal benthos sampling network |
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Application publication date: 20120912 |