CN115039729B - Small yellow croaker transfer device and method capable of improving survival rate - Google Patents
Small yellow croaker transfer device and method capable of improving survival rate Download PDFInfo
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- CN115039729B CN115039729B CN202210703007.4A CN202210703007A CN115039729B CN 115039729 B CN115039729 B CN 115039729B CN 202210703007 A CN202210703007 A CN 202210703007A CN 115039729 B CN115039729 B CN 115039729B
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K61/00—Culture of aquatic animals
- A01K61/60—Floating cultivation devices, e.g. rafts or floating fish-farms
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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
Abstract
The invention discloses a small yellow croaker transfer device and a method capable of improving survival rate, comprising a transfer net cage, wherein the transfer net cage is of a cylindrical structure, the side wall of the transfer net cage is composed of a split screen cloth, a separation net is arranged in the middle of an inner cavity of the transfer net cage, and the separation net is fixedly connected to the separation net; the upper part of the transition net cage is provided with a buoyancy adjusting component; the gravity adjusting component is arranged at the lower part of the transition net cage; an upper moving ring is arranged on the outer side wall of the split screen cloth, a lower moving ring is arranged below the upper moving ring, the upper moving ring and the lower moving ring are fixedly connected through an elastic rope body, and the upper moving ring and the lower moving ring are of a ring-shaped structure and are coaxially arranged with the transition net cage; the invention utilizes the separation net in the transition net cage to realize layered trapping of the small yellow croaker, reduces extrusion risk, increases the toughness of the bottom of the transition net cage through the second flexible connecting rod of the gravity adjusting component, and can not damage the fish at the bottom while guaranteeing bearing capacity.
Description
Technical Field
The invention relates to the technical field of fish transfer cultivation, in particular to a small yellow croaker transfer device and method capable of improving survival rate.
Background
The small yellow croaker is warm-temperature bottom layer knot group migration fish which generally inhabits soft mud or silt sea areas, the phenomenon of vertical movement of the small yellow croaker can enter estuary areas, is hard to light, is loved to turbid water flow, rises in dusk, falls in dawn, and often inhabits the bottom layer or near the bottom layer in daytime, main foods are planktonic crustaceans, predatory decagons and other young fishes, and are distributed in northwest taiflat ocean areas including China, korean and Korean coasts, and in China, bohai sea, east sea and south of yellow sea.
A transit and classification temporary rearing system (CN 113273534 a) for dam-populated fish disclosed in the prior art, the invention comprises: the chute is a transport channel which is obliquely arranged, and is provided with a counting device; a temporary culture pond, wherein a fish inlet is formed in one side of the temporary culture pond and is connected with an outlet of the chute, the temporary culture pond is divided into two temporary culture areas by a baffle, and the temporary culture pond is provided with an electric valve, a submersible pump and an oxygenation device; the grading grating is arranged in the temporary rearing pond, one end, close to the sliding groove, of the grating strip is arranged on the bottom surface of the fish inlet, the other end of the grating strip is scattered and fixed on the baffle plate in a fan shape, fish flowing out of the sliding groove are conveyed into the temporary rearing pond through the grading grating, small fish with smaller volume drop into the first temporary rearing area from gaps among the grating strips, and large fish slides on the grading grating to the second temporary rearing area; the fish counting and sorting device can count and sort fish well and temporarily cultivate fish, and meanwhile, the survival rate of fish can be effectively guaranteed.
Disclosure of Invention
The invention aims to provide a small yellow croaker transfer device and method capable of improving survival rate, and aims to solve the problems that in the existing transfer device, fishes are seriously extruded mutually, the fish feeding efficiency is low during trapping, and the fish is easy to deform under the impact of water flow.
In order to achieve the above purpose, the present invention provides the following technical solutions: the small yellow croaker transfer device capable of improving survival rate comprises a transfer net cage, wherein the transfer net cage is of a cylindrical structure, the side wall of the transfer net cage is composed of a separation net cloth, a separation net is arranged in the middle of an inner cavity of the transfer net cage and fixedly connected to the separation net cloth, and the separation net is parallel to a plane where the bottom surface of the transfer net cage is located; the upper part of the transition net cage is provided with a buoyancy adjusting component; the gravity adjusting component is arranged at the lower part of the transition net cage; an upper moving ring is arranged on the outer side wall of the split screen cloth, a lower moving ring is arranged below the upper moving ring, the upper moving ring and the lower moving ring are fixedly connected through an elastic rope body, and the upper moving ring and the lower moving ring are of a ring-shaped structure and are coaxially arranged with the transition net cage;
according to the small yellow croaker transfer device capable of improving the survival rate, layering trapping of the small yellow croakers is achieved by utilizing the separation net in the transfer net box, the extrusion risk is reduced, the toughness of the bottom of the transfer net box is improved through the second flexible connecting rod of the gravity adjusting component, the bearing capacity is ensured, and meanwhile, the fishes at the bottom are not damaged;
the outer side wall of the split screen cloth is combined with the upper moving ring and the lower moving ring, so that the aim of driving large yellow croakers can be achieved, specifically, the upper moving ring adopts a hollow shell design with larger buoyancy, the lower moving ring adopts a solid block design without buoyancy, when small yellow croakers are trapped, the buoyancy adjusting component and the gravity adjusting component can firstly expand the split screen cloth to be cylindrical, meanwhile, the lower moving ring firstly moves downwards under the action of gravity and simultaneously enables an elastic rope body to obtain elastic potential energy, when the lower moving ring moves to the bottom of a transition net cage, the elastic potential energy of the elastic rope body reaches the maximum, and then the lower moving ring is pulled back by the elastic rope body, so that the repeated circulation is realized, and the split screen cloth can be used for driving the large yellow croakers which are attracted by a phagostimulant and want to enter the split screen cloth, so that the fish feeding efficiency of the small yellow croakers is improved; on the other hand, the arrangement of the upper moving ring and the lower moving ring is beneficial to consuming the impact energy of water bodies in water to the transition net cage, stabilizing the position of the transition net cage in water and reducing the displacement of the transition net cage when impacted by the water bodies.
The buoyancy adjusting component is provided with a buoyancy main ring body, a buoyancy auxiliary ring body is coaxially arranged in the buoyancy main ring body, an upper sealing net piece is fixedly connected between the buoyancy main ring body and the buoyancy auxiliary ring body, a first auxiliary connecting rod is coaxially arranged below the buoyancy auxiliary ring body, a plurality of first flexible connecting rods are arranged on the side wall of the first auxiliary connecting rod, the other end part of each first flexible connecting rod is fixedly connected to the inner side wall of the buoyancy main ring body, and the other end part of each first auxiliary connecting rod is fixedly connected with a first floating body;
the gravity adjusting component is provided with a gravity main ring body, a gravity auxiliary ring body is coaxially arranged in the gravity main ring body, a lower sealing net piece is fixedly connected between the gravity main ring body and the gravity auxiliary ring body, a second auxiliary connecting rod is coaxially arranged below the gravity auxiliary ring body, a plurality of second flexible connecting rods are arranged on the side walls of the second auxiliary connecting rods, the other end parts of the second flexible connecting rods are fixedly connected to the inner side walls of the gravity main ring body, and the other end parts of the second auxiliary connecting rods are fixedly connected with first counterweight bodies;
the buoyancy adjusting component and the gravity adjusting component are designed, so that the transition net cage can be quickly unfolded by separating the screen cloth after falling into water, and the accommodating space range of the transition net cage is enlarged; on the other hand, the second flexible rod is matched with the lower sealing net piece to increase the toughness of the gravity adjusting component, so that the fish at the bottom of the transition net cage is prevented from being severely pressed when the transition net cage is lifted; on the other hand, the buoyancy adjusting component floats to enable the split screen cloth to deform, and then the combination of the upper moving ring and the lower moving ring is matched, so that the swimming of internal and external fishes is promoted, and the phenomenon that the entry of target fish shoals is influenced by gathering of fish shoals in the transition net box or large yellow croaker heads outside the transition net box are drilled into meshes of the split screen cloth is avoided.
A suspension sphere is arranged in the transition net cage, the upper end part of the suspension sphere is fixedly connected with the first floating body through an iron chain, and the lower end part of the suspension sphere is fixedly connected with the first counterweight body through an iron chain;
the buoyancy main ring body of the buoyancy adjusting component can drive the first floating body connected with the first auxiliary connecting rod to float through the first flexible connecting rod, and then the first floating body can drive the suspended sphere arranged in the middle of the transition net cage to float up and down, and the water flow impact energy suffered by the split screen cloth is consumed through the up-down floating of the suspended sphere in the middle, so that the deformation range of the split screen cloth when floating in water is reduced, and the transfer net cage is ensured to be in a relatively stable columnar form in the water body.
The application method of the small yellow croaker transfer device capable of improving the survival rate comprises the following steps:
-placing the transfer device in the culture pond, wherein the gravity adjusting component carries the bottom of the transfer net cage to enter the water bottom, the buoyancy adjusting component controls the top of the transfer net cage to float on the water surface, and the water body surrounded by the split screen cloth forms a screening area;
the method comprises the steps that a phagostimulant is placed in a transition net cage to attract fishes in a culture pond, large yellow croakers are intercepted by a separating screen cloth to the outside, meanwhile, a lower moving ring firstly moves downwards under the action of gravity, meanwhile, an elastic rope body obtains elastic potential energy, when the lower moving ring moves to the bottom of the transition net cage, the elastic potential energy of the elastic rope body is maximum, and then the elastic rope body pulls the lower moving ring back, so that the large yellow croakers which want to enter the separating screen cloth can be driven to circulate repeatedly;
after a certain number of small yellow croakers are trapped in the diversion net cage, the diversion device is lifted, then the small yellow croakers are placed in a diversion water tank with water body being prepared, and finally the small yellow croakers are transported to a target cultivation area.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the small yellow croaker transfer device capable of improving the survival rate, the purpose of driving large yellow croakers can be achieved by utilizing the combination of the upper moving ring and the lower moving ring on the outer side wall of the split screen cloth, the impact energy of water bodies in water to the transfer net cage is also favorably consumed, the position of the transfer net cage in the water is stabilized, and the displacement of the transfer net cage when impacted by the water bodies is reduced;
2. according to the small yellow croaker transfer device capable of improving the survival rate, the toughness of the gravity adjusting component is improved by matching the second flexible rod with the lower sealing net piece, so that the fish at the bottom of the transfer net box is prevented from being seriously pressed when the transfer net box is lifted; 3. according to the small yellow croaker transfer device capable of improving the survival rate, the split screen cloth can be deformed through the floating of the buoyancy adjusting component, and then the combination of the upper moving ring and the lower moving ring is matched, so that the swimming of inner and outer fishes is promoted, the aggregation of fish shoals in the transfer net box or the penetration of large yellow croaker heads outside the transfer net box into meshes of the split screen cloth is avoided, and the entry of target fish shoals is influenced; 3. this little yellow croaker of survival rate can be improved and device is transferred, through the upper and lower unsteady rivers impact energy that consume branch screen cloth received of middle part suspension spheroid, the deformation scope that makes branch screen cloth when floating in water reduces, guarantees to transport the net cage and is the column form of relative stability in the water.
Drawings
FIG. 1 is a schematic diagram of a small yellow croaker transfer device with improved survival rate according to an embodiment of the present invention;
FIG. 2 is a schematic view of the buoyancy adjustment assembly of FIG. 1;
FIG. 3 is a schematic view of the gravitational adjustment assembly of FIG. 1;
fig. 4 is a schematic diagram of a connection structure of the suspension sphere shown in fig. 1.
In the figure: 1. a transition net cage; 11. separating screen cloth; 12. a separation net; 2. a buoyancy adjustment assembly; 21. a buoyancy main ring body; 22. a buoyancy secondary ring body; 23. a sealing net piece is arranged on the upper part; 24. a first auxiliary link; 25. a first flexible link; 26. a first floating body; 3. a gravity adjustment assembly; 31. a gravity main ring body; 32. a gravity auxiliary ring body; 33. a lower sealing net sheet; 34. a second auxiliary link; 35. a second flexible link; 36. a first counterweight; 4. an upper moving ring; 41. a lower moving ring; 42. an elastic rope body; 5. suspending the sphere; 51. an iron chain.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, an embodiment of the present invention is provided: the small yellow croaker transfer device capable of improving survival rate comprises a transfer net cage 1, wherein the transfer net cage 1 is of a cylindrical structure, the side wall of the transfer net cage 1 is composed of a separation net cloth 11, a separation net 12 is arranged in the middle of an inner cavity of the transfer net cage 1, the separation net 12 is fixedly connected to the separation net cloth 11, and the separation net 12 is parallel to a plane where the bottom surface of the transfer net cage 1 is located; the buoyancy adjusting component 2 is arranged at the upper part of the transition net cage 1; the gravity adjusting component 3 is arranged at the lower part of the transition net cage 1; an upper moving ring 4 is arranged on the outer side wall of the split screen cloth 11, a lower moving ring 41 is arranged below the upper moving ring 4, the upper moving ring 4 and the lower moving ring 41 are fixedly connected through an elastic rope body 42, and the upper moving ring 4 and the lower moving ring 41 are of a ring-shaped structure and are coaxially arranged with the transition net cage 1;
according to the small yellow croaker transfer device capable of improving the survival rate, layering trapping of small yellow croakers is achieved by using the separation net 12 in the transfer net cage 1, the extrusion risk is reduced, the toughness of the bottom of the transfer net cage 1 is improved through the second flexible connecting rod 35 of the gravity adjusting component 3, and the supporting capacity is ensured, and meanwhile, fishes at the bottom are not damaged;
the outer side wall of the split screen cloth 11 is combined with the upper moving ring 4 and the lower moving ring 41, so that the aim of driving large yellow croakers can be achieved, specifically, the upper moving ring 4 adopts a hollow shell design with larger buoyancy, the lower moving ring 41 adopts a solid block design without buoyancy, when small yellow croakers are trapped, the buoyancy adjusting component 2 and the gravity adjusting component 3 can firstly expand the split screen cloth 11 to be cylindrical, meanwhile, the lower moving ring 41 firstly moves downwards under the action of gravity, and simultaneously the elastic rope body 42 obtains elastic potential energy, when the lower moving ring 41 moves to the bottom of the transition net cage 1, the elastic potential energy of the elastic rope body 42 reaches the maximum, and then the lower moving ring 41 is pulled back by the elastic rope body 42, so that the small yellow croakers repeatedly circulate, and the split screen cloth can be used for driving the large yellow croakers which are attracted by a phagostimulant and want to enter the split screen cloth 11, and the fish feeding efficiency of the small yellow croakers is improved; on the other hand, the arrangement of the upper moving ring 4 and the lower moving ring 41 is beneficial to consuming the impact energy of the water body in water to the transition net cage 1, stabilizing the position of the transition net cage 1 in the water and reducing the displacement of the transition net cage 1 when impacted by the water body.
Referring to fig. 1-3, a buoyancy adjusting assembly 2 has a buoyancy main ring body 21, a buoyancy auxiliary ring body 22 is coaxially arranged in the buoyancy main ring body 21, an upper sealing net piece 23 is fixedly connected between the buoyancy main ring body 21 and the buoyancy auxiliary ring body 22, a first auxiliary connecting rod 24 is coaxially arranged below the buoyancy auxiliary ring body 22, a plurality of first flexible connecting rods 25 are arranged on the side wall of the first auxiliary connecting rod 24, the other end part of the first flexible connecting rod 25 is fixedly connected to the inner side wall of the buoyancy main ring body 21, and the other end part of the first auxiliary connecting rod 24 is fixedly connected with a first floating body 26;
the gravity adjusting component 3 is provided with a gravity main ring body 31, a gravity auxiliary ring body 32 is coaxially arranged in the gravity main ring body 31, a lower sealing net piece 33 is fixedly connected between the gravity main ring body 31 and the gravity auxiliary ring body 32, a second auxiliary connecting rod 34 is coaxially arranged below the gravity auxiliary ring body 32, a plurality of second flexible connecting rods 35 are arranged on the side walls of the second auxiliary connecting rods 34, the other end parts of the second flexible connecting rods 35 are fixedly connected to the inner side walls of the gravity main ring body 31, and the other end parts of the second auxiliary connecting rods 34 are fixedly connected with first counterweight bodies 36;
the buoyancy adjusting component 2 and the gravity adjusting component 3 are designed, so that the transition net cage 1 can be quickly unfolded by separating the screen cloth 11 after falling into water, and the accommodating space range of the transition net cage is enlarged; on the other hand, the second flexible rod is matched with the lower sealing net piece 33, so that the toughness of the gravity adjusting component 3 is increased, and the fish at the bottom of the transition net cage 1 is prevented from being severely pressed when the transition net cage 1 is lifted; on the other hand, the buoyancy adjusting component 2 can deform the split screen cloth 11, and then the combination of the upper moving ring 4 and the lower moving ring 41 is matched, so that the swimming of fishes inside and outside is promoted, and the phenomenon that the inside of the transition net cage 1 gathers fish shoals or the heads of large yellow croakers outside the transition net cage 1 dig into meshes of the split screen cloth 11 to influence the entering of target fish shoals is avoided.
Referring to fig. 1 and 4, a suspension sphere 5 is arranged in the transition net cage 1, the upper end of the suspension sphere 5 is fixedly connected with the first floating body 26 through an iron chain 51, and the lower end of the suspension sphere 5 is fixedly connected with the first counterweight body 36 through the iron chain 51;
the buoyancy main ring body 21 of the buoyancy adjusting component 2 can drive the first floating body 26 connected with the first auxiliary connecting rod 24 to float through the first flexible connecting rod 25, and then the first floating body 26 can drive the suspended sphere 5 arranged in the middle of the transition net cage 1 to float up and down, the water flow impact energy received by the branch screen cloth 11 is consumed through the up-and-down floating of the suspended sphere 5 in the middle, so that the deformation range of the branch screen cloth 11 when floating in water is reduced, and the transfer net cage is ensured to be in a relatively stable columnar form in the water body.
Working principle:
placing the transfer device in a culture pond, carrying the bottom of the transfer net cage 1 by the gravity adjusting component 3 to enter the water bottom, controlling the top of the transfer net cage 1 to float on the water surface by the buoyancy adjusting component 2, and forming a screening area by the water body surrounded by the split screen cloth 11;
by placing a phagostimulant inside the transfer cage 1, attracting the fish in the culture pond, the large yellow croaker is intercepted by the split screen cloth 11 from the outside, at the same time, the lower moving ring 41 moves downwards under the action of gravity, the elastic rope 42 obtains elastic potential energy, when the lower moving ring 41 moves to the bottom of the transfer cage 1, the elastic potential energy of the elastic rope 42 reaches the maximum, and then the elastic rope 42 pulls the lower moving ring 41 back, so that the large yellow croaker is repeatedly circulated for driving the large yellow croaker which wants to enter the inside of the split screen cloth 11;
after a certain number of small yellow croakers are trapped in the diversion net cage 1, the diversion device is lifted, then the small yellow croakers are placed in a diversion water tank with a water body being prepared, and finally the small yellow croakers are transported to a target cultivation area.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (4)
1. A small yellow croaker transfer device capable of improving survival rate comprises,
the device comprises a transition net box (1), wherein the transition net box (1) is of a cylindrical structure, the side wall of the transition net box (1) is composed of a branch screen cloth (11), a separation net (12) is arranged in the middle of an inner cavity of the transition net box (1), the separation net (12) is fixedly connected to the branch screen cloth (11), and the separation net (12) is parallel to a plane where the bottom surface of the transition net box (1) is located; the buoyancy adjusting component (2) is arranged at the upper part of the transition net cage (1);
the gravity adjusting assembly (3) is arranged at the lower part of the transition net cage (1);
the method is characterized in that: an upper moving ring (4) is arranged on the outer side wall of the split screen cloth (11), a lower moving ring (41) is arranged below the upper moving ring (4), the upper moving ring (4) and the lower moving ring (41) are fixedly connected through an elastic rope body (42), and the upper moving ring (4) and the lower moving ring (41) are of a ring-shaped structure and are coaxially arranged with the transition net cage (1);
the buoyancy adjusting assembly (2) is provided with a buoyancy main ring body (21), a buoyancy auxiliary ring body (22) is coaxially arranged in the buoyancy main ring body (21), an upper sealing net piece (23) is fixedly connected between the buoyancy main ring body (21) and the buoyancy auxiliary ring body (22), a first auxiliary connecting rod (24) is coaxially arranged below the buoyancy auxiliary ring body (22), a plurality of first flexible connecting rods (25) are arranged on the side wall of the first auxiliary connecting rod (24), the other end part of each first flexible connecting rod (25) is fixedly connected to the inner side wall of the buoyancy main ring body (21), and a first floating body (26) is fixedly connected to the other end part of each first auxiliary connecting rod (24);
the gravity adjusting component (3) is provided with a gravity main ring body (31), a gravity auxiliary ring body (32) is coaxially arranged inside the gravity main ring body (31), a lower sealing net piece (33) is fixedly connected between the gravity main ring body (31) and the gravity auxiliary ring body (32), a second auxiliary connecting rod (34) is coaxially arranged below the gravity auxiliary ring body (32), a plurality of second flexible connecting rods (35) are arranged on the side wall of the second auxiliary connecting rod (34), the other end part of the second flexible connecting rod (35) is fixedly connected to the inner side wall of the gravity main ring body (31), and the other end part of the second auxiliary connecting rod (34) is fixedly connected with a first counterweight body (36).
2. A small yellow croaker transfer device capable of improving survival rate according to claim 1, wherein: the inside of transition box with a net (1) is equipped with suspension spheroid (5), the upper end of suspension spheroid (5) with first body (26) pass through iron chain (51) fixed connection, the lower tip of suspension spheroid (5) with first counterweight body (36) pass through iron chain (51) fixed connection.
3. The small yellow croaker transition device capable of improving survival rate according to claim 2, further comprising a lifting device and a transition water tank, wherein when a certain number of small yellow croakers are trapped in the transition net cage (1), the small yellow croakers in the transition net cage (1) are placed into the transition water tank of the well-matched water body through the lifting device.
4. A method of using a small yellow croaker transfer device with improved survival as recited in claim 3, comprising the steps of:
-placing the transfer device in a culture pond, enabling the gravity adjusting component (3) to carry the bottom of the transfer net cage (1) to enter the water bottom, enabling the buoyancy adjusting component (2) to control the top of the transfer net cage (1) to float on the water surface, and enabling the water body surrounded by the split screen cloth (11) to form a screening area;
-by placing a phagostimulant inside the transfer cage (1), attracting the fish in the tank, the large yellow croaker is caught outside by the split screen cloth (11), while the lower moving ring (41) can move up and down along the outside of the split screen cloth (11) due to the action of gravity and the tension of the elastic rope (42), for driving the large yellow croaker wanting to enter inside the split screen cloth (11).
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| CN202210703007.4A CN115039729B (en) | 2022-06-21 | 2022-06-21 | Small yellow croaker transfer device and method capable of improving survival rate |
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| CN202210703007.4A CN115039729B (en) | 2022-06-21 | 2022-06-21 | Small yellow croaker transfer device and method capable of improving survival rate |
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| CN115039729B true CN115039729B (en) | 2023-05-16 |
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