CN112005971B - Trawl equipment using camera monitoring and turtle escaping device - Google Patents
Trawl equipment using camera monitoring and turtle escaping device Download PDFInfo
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- CN112005971B CN112005971B CN202010831438.XA CN202010831438A CN112005971B CN 112005971 B CN112005971 B CN 112005971B CN 202010831438 A CN202010831438 A CN 202010831438A CN 112005971 B CN112005971 B CN 112005971B
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- 241000270666 Testudines Species 0.000 title claims abstract description 46
- 238000012544 monitoring process Methods 0.000 title claims abstract description 16
- 238000000926 separation method Methods 0.000 claims abstract description 28
- 238000012806 monitoring device Methods 0.000 claims abstract description 16
- 230000009194 climbing Effects 0.000 claims description 16
- 241000270617 Cheloniidae Species 0.000 claims description 7
- 241001233242 Lontra Species 0.000 abstract description 5
- 241000270708 Testudinidae Species 0.000 description 14
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 8
- 210000003194 forelimb Anatomy 0.000 description 6
- 238000005192 partition Methods 0.000 description 5
- 230000002349 favourable effect Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 210000001364 upper extremity Anatomy 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 241000251468 Actinopterygii Species 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 2
- 240000007643 Phytolacca americana Species 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 210000000078 claw Anatomy 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000029058 respiratory gaseous exchange Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
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- 210000004072 lung Anatomy 0.000 description 1
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- 230000004083 survival effect Effects 0.000 description 1
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Classifications
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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
- A01K73/00—Drawn nets
- A01K73/02—Trawling nets
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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
- A01K75/00—Accessories for fishing nets; Details of fishing nets, e.g. structure
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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
- A01K75/00—Accessories for fishing nets; Details of fishing nets, e.g. structure
- A01K75/04—Floats
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/181—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a plurality of remote sources
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Marine Sciences & Fisheries (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
Abstract
The invention discloses trawl equipment utilizing a camera monitoring and turtle escaping device, and aims to provide trawl equipment capable of enabling turtles captured by a trawl to escape without influencing normal fishing of the trawl so as to protect the turtles. It includes the dictyosome, camera monitoring device and chelonian escape device, the chelonian escape device is including both ends open-ended cylinder mould around including, set up the separation grid tray in the cylinder mould and set up the formula of dialling escape structure on the cylinder mould, the separation grid tray separates into preceding cavity and back cavity with the inner chamber of cylinder mould, dial formula escape structure including setting up the escape opening on the cylinder mould lateral wall, fix the intraoral carriage of escaping, fix the guide arm on the carriage, the stopper and the two gliding otter boards of guide arm are followed in the setting at the guide arm middle part, the dictyosome includes preceding dictyosome and the back dictyosome of being connected with the dictyosome, the rear end border of preceding dictyosome is connected with the front end border of cylinder mould, the front end border of back dictyosome is connected with the back end border of cylinder mould.
Description
Technical Field
The invention relates to a trawl, in particular to trawl equipment using a camera monitoring and turtle escaping device.
Background
At present, all turtles are determined as endangered species by the international alliance for natural and natural resource conservation and the international trade convention for endangered animal and plant species, and the international trade is strictly forbidden and protected. China also classified the sea turtles as national protection animals in the last 70 th century. At present, the main 5 factors threatening the survival of the turtles are fishery side-harvest, direct predation, coastal beach development, environmental pollution and diseases, and global warming, wherein the trawl fishing is caught together with the turtles, which are the organisms of lung respiration, and when the turtles are caught in the trawl, they are finally drowned because they cannot return to the sea surface for respiration.
Disclosure of Invention
The invention aims to provide trawl equipment which can enable turtles captured by a trawl to escape without influencing the normal fishing of the trawl so as to protect the turtles by using a camera monitoring and turtle escaping device.
The technical scheme of the invention is as follows:
a trawl apparatus using camera monitoring and chelonian escape device comprises a net body and a net bag, and is characterized by further comprising a camera monitoring device and a chelonian escape device, wherein the camera monitoring device is arranged at the joint of the net body or the net body and the net bag, and the camera monitoring device shoots the chelonian escape device;
the turtle escape device comprises a net cage with openings at the front end and the rear end, a separation grid plate arranged in the net cage and a poking-type escape structure arranged on the net cage, wherein the separation grid plate divides an inner cavity of the net cage into a front cavity and a rear cavity, the poking-type escape structure is positioned in the front cavity and is close to the separation grid plate, the poking-type escape structure comprises an escape opening arranged on the side wall of the net cage, a support frame fixed in the escape opening, a guide rod fixed on the support frame, a limiting block arranged in the middle of the guide rod and two sliding screen plates sliding along the guide rod, the two sliding screen plates are positioned at two opposite sides of the limiting block, the sliding screen plates are connected with the support frame through elastic pieces, the elastic pieces are used for providing elastic force so that the sliding screen plates slide along the guide rod and abut against the limiting block, when the two sliding screen plates abut against the limiting block, the two sliding net plates cover the escape opening;
the net bag comprises a front net bag and a rear net bag which are connected with the net body, the rear end edge of the front net bag is connected with the front end edge of the net cage, and the front end edge of the rear net bag is connected with the rear end edge of the net cage.
In the trawl fishing process, the fish can enter the rear cavity of the net cage through the separation grid plate and then enter the rear net bag; the turtles are blocked by the separation grid plates after entering the trawl; the turtles blocked by the separation grid plates will be located in the front cavities close to the separation grid plates. The poking-open type escape structure utilizes the characteristic that forelimbs can be continuously stirred outwards in the climbing process of the chelonian, and the poking-open type escape structure is arranged in the front cavity close to the separation grid plate, so that the chelonian blocked by the separation grid plate can hook the sliding screen plate by utilizing the claws of the forelimbs to poke the sliding screen plate to enable the chelonian to escape through the escape opening in the escape process of the chelonian; after the turtle passes through the poking-type escape structure, the sliding net plate resets under the action of the elastic piece to seal and cover the escape opening; therefore, the aim of enabling the turtles captured by the trawl to escape under the condition of not influencing the normal fishing of the trawl is fulfilled, and the turtles are protected.
Simultaneously, can also shoot towards the chelonian escape device direction through monitoring device that makes a video recording, acquire the process that the chelonian escaped from to improve the formula of dialling open and escape the structure in the later stage.
On the other hand, the turtle escaping device is independently arranged and then connected between the front net bag and the rear net bag, so that the actual production and manufacturing are facilitated.
Preferably, the rear end edge of the front net bag is connected with the front end edge of the net cage through a connecting rope. Therefore, the net bag and the net cage can be separated through the connecting rope between the net bag and the net cage before disassembly, so that the net cage can be conveniently disassembled, cleaned, maintained and replaced.
Preferably, the front end edge of the rear net bag is connected with the rear end edge of the net cage through a connecting rope. Therefore, the rear net bag can be separated from the net cage by disassembling the connecting rope between the rear net bag and the net cage, so that the net cage can be conveniently disassembled, cleaned, maintained and replaced.
Preferably, the upper part of the separation grid plate is inclined towards the rear cavity of the mesh bag, and the escape opening is positioned at the upper part of the side wall of the mesh bag. So, can lead to the tortoise through separating the grid plate, make the tortoise that is blocked by the separation grid plate, move about to escape the mouth department along separating the grid plate backward direction slant, be favorable to the tortoise to escape through the structure of fleing from the formula.
Preferably, the inclination angle of the partition grids is 30 to 60 degrees.
Preferably, the support frame is further provided with an outer climbing net plate, and the outer climbing net plate is located on the outer side of the net bag. So, after the forelimb of the tortoise passed the escape opening, the in-process of stirring at the forelimb just catches on outer climbing otter board easily to through outer climbing otter board as the support that the forelimb of tortoise took place the strength, make the climbing that the tortoise can be smooth pull out formula escape structure, be favorable to the tortoise to flee from.
Preferably, the turtle escaping device further comprises a floating ball, the floating ball is located above the net cage, and the floating ball is connected with the net cage through a connecting piece. So, can offset the weight of sea turtle escape device through the buoyancy of floater, effectively reduce the influence of sea turtle escape device to the trawl work.
Preferably, the netpen is cylindrical.
The invention has the beneficial effects that: can enable the turtles captured by the trawl to escape without influencing the normal fishing of the trawl, so as to protect the turtles.
Drawings
Fig. 1 is a partial structural schematic view of a trawl apparatus using a camera monitoring and turtle escaping device according to the present invention.
Fig. 2 is a partial structural view in the direction a of fig. 1.
Fig. 3 is a partial structural view in the direction B in fig. 2.
In the figure:
a net body 1;
a mesh bag 2, a front mesh bag 2.1 and a rear mesh bag 2.2;
a cylinder mould 3, a front cavity 3.1 and a rear cavity 3.2;
a partition grid plate 4;
the device comprises a poking-open type escape structure 5, an escape opening 5.1, a support frame 5.2, a guide rod 5.3, a sliding screen plate 5.4, an elastic piece 5.5, a sliding sleeve 5.6, a limiting block 5.7 and an outer climbing screen plate 5.8;
a floating ball 6;
and an image pickup monitoring device 7.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention are clearly explained and illustrated below with reference to the accompanying drawings, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present scheme, and are not construed as limiting the scheme of the present invention.
These and other aspects of embodiments of the invention will be apparent with reference to the following description and attached drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the ways in which the principles of the embodiments of the invention may be practiced, but it is understood that the scope of the embodiments of the invention is not limited thereby. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
In the description of the present invention, it is to be understood that the terms "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., and "several" means one or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The first embodiment is as follows: as shown in fig. 1, a trawl apparatus using a camera monitoring and turtle escaping device includes a net body 1, a net bag 2, a turtle escaping device and a camera monitoring device 7. The camera monitoring device 7 is fixed at the net body or the junction between the net bag and the net body, in this embodiment, the camera monitoring device 7 is fixed at the junction between the net bag and the net body. The camera monitoring device shoots towards the direction of the sea turtle escaping device. In this embodiment, the monitoring device that makes a video recording is the monitoring device that makes a video recording under water from taking battery and storage card, and is specific, and the monitoring device that makes a video recording includes a plurality of camera under water, and the camera under water is the camera under water from taking battery and storage card.
As shown in fig. 1 and 2, the turtle escape device comprises a turtle escape device including a net cage 3 with openings at the front and rear ends, a separation grid plate 4 arranged in the net cage, and a pull-out escape structure 5 arranged on the net cage. In this embodiment, the netpen is cylindrical, but may be square or other shapes. The inner cavity of the mesh cage is divided into a front cavity 3.1 and a rear cavity 3.2 by the separation grid plate. The poke-open type escape structure is positioned in the front cavity and is close to the separation grid plate.
The poking-type escape structure 5 comprises an escape opening 5.1 formed in the side wall of the cylinder mould, a support frame 5.2 arranged in the escape opening, a guide rod 5.3 fixed on the support frame, a limiting block 5.7 arranged in the middle of the guide rod and two sliding net plates 5.4 sliding along the guide rod. In this embodiment, the support frame is fixed to the side wall of the netpen. The two sliding net plates are positioned at two opposite sides of the limiting block. The sliding net plate is connected with the supporting frame through an elastic piece 5.5, one end of the elastic piece is connected with the corresponding sliding net plate, and the other end of the elastic piece is connected with the supporting frame. In this embodiment, the elastic member is a rubber band or a pull-cord spring. The elastic piece is used for providing elastic force so that the sliding screen plate slides along the guide rod and abuts against the limiting block. After the two sliding screen plates abut against the limiting block, the two sliding screen plates seal and cover the escape opening.
The mesh bag 2 comprises a front mesh bag 2.1 and a rear mesh bag 2.2 which are connected with the net body. The net cage is positioned between the front net sac and the rear net sac. The rear end edge of the front net bag is connected with the front end edge of the net cage. The front end edge of the back net bag is connected with the back end edge of the net cage. The rear end of the rear net bag is closed.
In the trawl fishing process, fish can enter the rear net sac through the separation grid plate, and the turtles are blocked by the separation grid plate after entering the trawl; the turtles blocked by the separation grid plates will be located in the front cavities close to the separation grid plates.
The poking-open type escape structure of the embodiment utilizes the characteristic that forelimbs can be continuously stirred outwards in the climbing process of the chelonian, and the poking-open type escape structure is arranged in the front cavity close to the separation grid plate, so that the chelonian blocked by the separation grid plate can hook the sliding screen plate by utilizing the claws of the forelimbs to poke the sliding screen plate when the chelonian is close to the poking-open type escape structure in the escape process, and the chelonian escapes through the escape opening; after the turtle passes through the poking-type escape structure, the sliding net plate resets under the action of the elastic piece to seal and cover the escape opening; therefore, the aim of enabling the turtles captured by the trawl to escape under the condition of not influencing the normal fishing of the trawl is fulfilled, and the turtles are protected.
Simultaneously, can also shoot towards the chelonian escape device direction through monitoring device that makes a video recording, acquire the process that the chelonian escaped from to improve the formula of dialling open and escape the structure in the later stage.
On the other hand, the turtle escaping device is independently arranged and then connected between the front net bag and the rear net bag, so that the actual production and manufacturing are facilitated.
Furthermore, the rear end edge of the front net bag is connected with the front end edge of the net cage through a connecting rope. Therefore, the net bag and the net cage can be separated through the connecting rope between the net bag and the net cage before disassembly, so that the net cage can be conveniently disassembled, cleaned, maintained and replaced.
Furthermore, the front end edge of the rear net bag is connected with the rear end edge of the net cage through a connecting rope. Therefore, the rear net bag can be separated from the net cage by disassembling the connecting rope between the rear net bag and the net cage, so that the net cage can be conveniently disassembled, cleaned, maintained and replaced.
Further, as shown in fig. 1, the turtle escaping device further comprises a floating ball 6, the floating ball is located above the net cage, and the floating ball is connected with the net cage through a connecting piece. The buoyancy of floater is more than or equal to the gravity of chelonian escape device, and in this embodiment, the buoyancy of floater is equal to the gravity of chelonian escape device. So, can offset the weight of sea turtle escape device through the buoyancy of floater, effectively reduce the influence of sea turtle escape device to the trawl work.
Further, as shown in fig. 1, the upper part of the partition grid plate 4 is inclined towards the rear cavity of the mesh bag, and the escape opening is positioned at the upper part of the side wall of the mesh bag. So, can lead to the tortoise through separating the grid plate, make the tortoise that is blocked by the separation grid plate, move about to escape the mouth department along separating the grid plate backward direction slant, be favorable to the tortoise to escape through the structure of fleing from the formula.
The inclination angle of the partition grids is 30-60 degrees, and in the embodiment, the inclination angle of the partition grids is 40 degrees.
Further, as shown in fig. 3, an outer climbing net plate 5.8 is further arranged on the supporting frame, and the outer climbing net plate is located on the outer side of the net bag. So, after the forelimb of the tortoise passed the escape opening, the in-process of stirring at the forelimb just catches on outer climbing otter board easily to through outer climbing otter board as the support that the forelimb of tortoise took place the strength, make the climbing that the tortoise can be smooth pull out formula escape structure, be favorable to the tortoise to flee from. In this embodiment, the opposite sides of the supporting frame are provided with an outer climbing net plate.
Further, as shown in fig. 2 and 3, sliding sleeves 5.6 corresponding to the guide rods one to one are arranged on the sliding net plate, and the sliding sleeves are sleeved on the corresponding guide rods and can slide along the guide rods, so that the sliding net plate can slide along the guide rods. The two guide rods are parallel, one guide rod is close to one side of the supporting frame, and the other guide rod is close to the other opposite side of the supporting frame.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, alterations and equivalents of the above embodiments according to the technical spirit of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (9)
1. A trawl apparatus using camera monitoring and turtle escaping device comprises a net body and a net bag, and is characterized by also comprising a camera monitoring device and a turtle escaping device,
the camera monitoring device is arranged at the joint of the net body or the net body and the net bag, and shoots the sea turtle escape device;
the turtle escape device comprises a net cage with openings at the front end and the rear end, a separation grid plate arranged in the net cage and a poking-type escape structure arranged on the net cage, wherein the separation grid plate divides an inner cavity of the net cage into a front cavity and a rear cavity, the poking-type escape structure is positioned in the front cavity and is close to the separation grid plate, the poking-type escape structure comprises an escape opening arranged on the side wall of the net cage, a support frame fixed in the escape opening, a guide rod fixed on the support frame, a limiting block arranged in the middle of the guide rod and two sliding screen plates sliding along the guide rod, the two sliding screen plates are positioned at two opposite sides of the limiting block, the sliding screen plates are connected with the support frame through elastic pieces, the elastic pieces are used for providing elastic force so that the sliding screen plates slide along the guide rod and abut against the limiting block, when the two sliding screen plates abut against the limiting block, the two sliding net plates cover the escape opening;
the net bag comprises a front net bag and a rear net bag which are connected with the net body, the rear end edge of the front net bag is connected with the front end edge of the net cage, and the front end edge of the rear net bag is connected with the rear end edge of the net cage.
2. The trawl apparatus with camera monitoring and turtle escaping device as claimed in claim 1, wherein the rear end edge of the front net bag is connected with the front end edge of the net cage by a connecting rope.
3. The trawl apparatus with camera monitoring and turtle escaping device as claimed in claim 1 or 2, wherein the front end edge of the rear net bag is connected with the rear end edge of the net cage by a connecting rope.
4. The trawl apparatus for monitoring and controlling turtle escape by camera according to claim 1 or 2, wherein the upper portion of the separation grid is inclined toward the rear end of the cylinder mould, and the escape opening is located at the upper portion of the side wall of the cylinder mould.
5. The trawl apparatus for monitoring and turtle escaping device by camera as claimed in claim 4, wherein the inclination angle of the separation grid is 30-60 degrees.
6. The trawl apparatus using camera monitoring and turtle escaping device according to claim 1 or 2, wherein the supporting frame is further provided with an outer climbing net plate, and the outer climbing net plate is located outside the net bag.
7. The trawl apparatus with camera monitoring and turtle escaping device according to claim 1 or 2, wherein the turtle escaping device further comprises a floating ball, the floating ball is connected with the net cage through a connecting member.
8. The trawl apparatus with camera monitoring and turtle escaping device as claimed in claim 7, wherein the floating ball is located above the net cage.
9. The apparatus as claimed in claim 1 or 2, wherein the net cage is cylindrical.
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| CN202010831438.XA CN112005971B (en) | 2020-08-18 | 2020-08-18 | Trawl equipment using camera monitoring and turtle escaping device |
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| CN202010831438.XA CN112005971B (en) | 2020-08-18 | 2020-08-18 | Trawl equipment using camera monitoring and turtle escaping device |
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| CN112005971B true CN112005971B (en) | 2022-03-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113261542B (en) * | 2021-05-17 | 2022-06-24 | 浙江省海洋水产研究所 | Self-adjusting marine animal selective fishing device |
| CN113180017B (en) * | 2021-05-24 | 2022-06-28 | 浙江海洋大学 | Fish and turtle separation device for trawl and use method thereof |
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| CN200938798Y (en) * | 2006-08-02 | 2007-08-29 | 中国水产科学研究院东海水产研究所 | Device for releasing scaleph by trawl |
| TWM392206U (en) * | 2010-06-28 | 2010-11-11 | Hui-Ming Yu | Ventilative escape exit structure |
| CN104285918A (en) * | 2014-09-23 | 2015-01-21 | 浙江海洋学院 | Selective catch separating device for trawl |
| CN107801699A (en) * | 2017-09-22 | 2018-03-16 | 浙江海洋大学 | A kind of special large jellyfish release acquisition method of trawlnet |
| 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 |
| CN209089724U (en) * | 2018-10-24 | 2019-07-12 | 四川农业大学 | A kind of tortoise oviposition case of unidirectional disengaging protection tortoise ovum |
| CN111034689A (en) * | 2019-10-08 | 2020-04-21 | 浙江省海洋水产研究所 | Automatic classification structure of trawl |
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