CN205266673U - Shrimp trawlnet net bag - Google Patents
Shrimp trawlnet net bag Download PDFInfo
- Publication number
- CN205266673U CN205266673U CN201520794207.0U CN201520794207U CN205266673U CN 205266673 U CN205266673 U CN 205266673U CN 201520794207 U CN201520794207 U CN 201520794207U CN 205266673 U CN205266673 U CN 205266673U
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- mesh
- net capsule
- shrimp
- net bag
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Abstract
The utility model discloses a shrimp trawlnet net bag, its end are equipped with halting back at the bottom of the bag, and the front end is used for connecting the end of shrimp trawlnet body, its characterized in that: the net bag divide into net bag anterior segment and net bag back end after to in the past, net bag anterior segment be square mesh structure, net bag back end is rhombus mesh structure. - the utility model discloses a shrimp trawlnet net bag has the high selectivity ability, can reduce the by -catch when guaranteeing the shrimps amount of fishing to protection fisheries resources, it is balanced to maintain coastal waters ecosystem.
Description
Technical field
This utility model relates to a kind of fishing gear, particularly relates to a kind of shrimp disease net capsule.
Background technology
Shrimp disease is to fish for, marine, the fishing gear that a kind of efficiency that shrimps use often is higher, and fishing operation is typically in coastal waters to carry out. In-shore fishery is lay eggs nursing ground and the various halobiontic habitat of multiple fishery resources, therefore shrimp disease fishing operation often obtains substantial amounts of secondary fishery harvesting. At the torrid zone and subtropical seas, secondary fishery harvesting problem is the most serious, fishery resources causes bigger infringement, has caused showing great attention to of various circles of society. The poor selectivity of shrimp disease net capsule is to cause the main cause of secondary fishery harvesting problem: traditional shrimp disease net capsule is diamond mesh, under the towing of fishing boat and the combined effect of current, mesh of cod-end is almost completely in closure state, causes that the secondary fishery harvesting entered in net capsule cannot be escaped. Therefore, in the urgent need to net capsule structure is improved, to improve its selection performance, with protection and Appropriate application fishery resources, keep Marginal Sea Ecosystems balance.
Summary of the invention
The purpose of this utility model is in that to provide a kind of shrimp disease net capsule, and it has high selection performance, can reduce by-catch while ensureing shrimps amount of fishing, thus protecting fishery resourses, maintains Marginal Sea Ecosystems balance.
Solving above-mentioned technical problem, this utility model takes techniques below scheme to be achieved:
A kind of shrimp disease net capsule, its end is equipped with drawline, and front end is for connecting the end of shrimp disease body, it is characterised in that: described net capsule is divided into net capsule leading portion and net capsule back segment from front to back, described net capsule leading portion is square mesh structure, and described net capsule back segment is diamond mesh structure.-preferably, the size of mesh of the square mesh of described net capsule leading portion is 35 ~ 40mm, and longitudinal mesh number is 30 ~ 40 orders, and circumference mesh number is 25 ~ 30 orders.
It is highly preferred that the size of mesh of the square mesh of described net capsule leading portion is 35mm, longitudinal mesh number 40 order, circumference mesh number is 29 orders.
Preferably, the size of mesh of the diamond mesh of described net capsule back segment is 18 ~ 25mm, and longitudinal mesh number is 30 ~ 40 orders, and circumference mesh number is 60 ~ 80 orders.
It is highly preferred that the size of mesh of the diamond mesh of described net capsule back segment is 18mm, longitudinal mesh number is 40 orders, and circumference mesh number is 80 orders.
Preferably, described shrimp disease net capsule selects structure number to be the netting twine of PE36tex3 �� 3.
The shrimp disease existing square mesh of net capsule of the present utility model, also has diamond mesh. Under the towing of fishing boat and the effect of current, network almost all closes, and square net is mostly in open configuration. The active escape capability of Fish is relatively strong, and it can pass through the grid that net capsule leading portion opens on one's own initiative and escape; The active escape capability of shrimps is more weak, therefore its majority is stayed in the etting of net capsule back segment Guan Bi. By this structural design, substantial amounts of secondary fishery harvesting can be released, and the quantity of the catch of shrimps is also guaranteed simultaneously.
This utility model has following beneficial effect:
1. the net capsule structure adopting square mesh to combine with diamond mesh, improves the selectivity of shrimp disease net capsule, protects fishery resourses while meeting production requirement, maintains Marginal Sea Ecosystems balance;
2. the use of square mesh decreases the hydrodynamic force of shrimp disease, decreases the oil consumption of fishing boat fuel oil to a certain extent, economizes on resources, and reduces production cost;
3., owing to part diamond mesh replacing with square mesh, shrimp disease net capsule of the present utility model is compared with existing shrimp disease net capsule, and etting consumption is less, and cost of manufacture is relatively low.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, this utility model is further described.
Fig. 1 is the structural representation of shrimp disease net capsule of the present utility model.
Accompanying drawing labelling: 1-net capsule leading portion; 2-net capsule back segment; 3-drawline.
Detailed description of the invention
In a preferred embodiment, shrimp disease net capsule of the present utility model is as shown in Figure 1. This shrimp disease net capsule is divided into net capsule leading portion 1 and net capsule back segment 2 from front to back. Net capsule leading portion 1 is square mesh structure, and its size of mesh is 35mm, longitudinal mesh number 40 order, and circumference mesh is 29 orders; Net capsule back segment 2 is diamond mesh structure, and its size of mesh is 18mm, and longitudinal mesh number is 40 orders, and circumference mesh is 80 orders. The end of net capsule back segment 2 is equipped with drawline 3. The structure number of this netting twine selected by shrimp disease net capsule is PE36tex3 �� 3. In use, it is only necessary to net capsule leading portion 1 and shrimp disease body are sewed up, drawline 3 is tightened and can carry out fishing operation. During hauling, unclamp drawline 3 and pour out fishery harvesting.
Adopt set net method in Northern Part of South China Sea fishing ground, the present embodiment is tested. Result shows that shrimp disease net capsule of the present utility model both ensure that the yield of shrimps, releases again substantial amounts of secondary fishery harvesting. Wherein, in secondary fishery harvesting, mantissa's escapement ratio of the little Schizothor axyunnanensis Norman of Kang Shi, black tail eel, center line cardinal fish and omnivorous bean tooth eel is all more than 80%, and mantissa's escapement ratio of acne rosacea rib, lactarid, brown patch, Nemipterus bathybius, mesognathy rib, Harengula nymphaea (Richardson). and many squamas is all more than 50%; Mantissa's escapement ratio of targeted species Metapenaeus joyneri and the new prawn of cutter volume only respectively 6.18% and 2.07%. As can be seen here, this utility model is releasable Fish pair fishery harvesting both, can guarantee that again shrimps yield, reaches reasonable utilization of fishery resources.
Claims (4)
1. a shrimp disease net capsule, its end is equipped with drawline (3), front end is for connecting the end of shrimp disease body, it is characterized in that: described net capsule is divided into net capsule leading portion (1) and net capsule back segment (2) from front to back, described net capsule leading portion (1) is square mesh structure, and described net capsule back segment (2) is diamond mesh structure; The size of mesh of the square mesh of described net capsule leading portion (1) is 35��40mm, and longitudinal mesh number is 30��40 orders, and circumference mesh number is 25��30 orders; The size of mesh of the diamond mesh of described net capsule back segment (2) is 18��25mm, and longitudinal mesh number is 30��40 orders, and circumference mesh number is 60��80 orders.
2. shrimp disease net capsule according to claim 1, it is characterised in that: the size of mesh of the square mesh of described net capsule leading portion (1) is 35mm, and longitudinal mesh number 40 order, circumference mesh number is 29 orders.
3. shrimp disease net capsule according to claim 1, it is characterised in that: the size of mesh of the diamond mesh of described net capsule back segment is 18mm, and longitudinal mesh number is 40 orders, and circumference mesh number is 80 orders.
4. shrimp disease net capsule according to claim 1, it is characterised in that: described shrimp disease net capsule selects structure number to be the netting twine of PE36tex3 �� 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520794207.0U CN205266673U (en) | 2015-10-15 | 2015-10-15 | Shrimp trawlnet net bag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520794207.0U CN205266673U (en) | 2015-10-15 | 2015-10-15 | Shrimp trawlnet net bag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205266673U true CN205266673U (en) | 2016-06-01 |
Family
ID=56051315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520794207.0U Expired - Fee Related CN205266673U (en) | 2015-10-15 | 2015-10-15 | Shrimp trawlnet net bag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205266673U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107410230A (en) * | 2017-05-18 | 2017-12-01 | 中国水产科学研究院东海水产研究所 | A kind of small mesh middle layer trawl |
| CN108575924A (en) * | 2018-03-13 | 2018-09-28 | 中国水产科学研究院南海水产研究所 | A kind of shrimp disease selectivity device |
| CN111642469A (en) * | 2020-06-04 | 2020-09-11 | 中国水产科学研究院东海水产研究所 | Bag-shaped net and method for acquiring escape rate of caught object from trawl mesh by using same |
-
2015
- 2015-10-15 CN CN201520794207.0U patent/CN205266673U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107410230A (en) * | 2017-05-18 | 2017-12-01 | 中国水产科学研究院东海水产研究所 | A kind of small mesh middle layer trawl |
| CN108575924A (en) * | 2018-03-13 | 2018-09-28 | 中国水产科学研究院南海水产研究所 | A kind of shrimp disease selectivity device |
| CN111642469A (en) * | 2020-06-04 | 2020-09-11 | 中国水产科学研究院东海水产研究所 | Bag-shaped net and method for acquiring escape rate of caught object from trawl mesh by using same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160601 Termination date: 20161015 |
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| CF01 | Termination of patent right due to non-payment of annual fee |