NL2031710B1

NL2031710B1 - Stereoscopic artificial fish nest for promoting natural propagation of fish that lay viscid eggs in reservoir region

Info

Publication number: NL2031710B1
Application number: NL2031710A
Authority: NL
Inventors: Yang Qing; Hu Lian; Zou Xi; Shi Fang; Yuan Yujie
Original assignee: Inst Of Hydroecology Mwr & Cas
Priority date: 2022-03-07
Filing date: 2022-04-26
Publication date: 2023-08-15
Also published as: CN114617092A; CN114617092B

Abstract

The disclosure relates to the technical field of artificial fish nests, solving the problem that, due to a water storage operation of a large-scale reservoir, spawning adhesion substrates for the fish that lay viscid eggs are reduced, or spawning habitats are lost, which results in a decline in resources of the fish. The stereoscopic artificial fish nest includes a plurality of diamond-shaped frames. Each diamond-shaped frame includes steel tubes and first connectors for connecting adjacent steel tubes, and second connectors for connecting the first connectors are arranged between the diamond-shaped frames so that the plurality of diamond-shaped frames form a grid structure as a whole. A floating plate is arranged inside the diamond-shaped frame to provide a buoyancy. The diamond-shaped frame is connected to ropes, sinkers are connected to bottoms of the ropes, and the ropes are provided with a plurality of scale rings.

Description

STEREOSCOPIC ARTIFICIAL FISH NEST FOR PROMOTING NATURAL PROPAGATION

OF FISH THAT LAY VISCID EGGS IN RESERVOIR REGION

TECHNICAL FIELD

The present invention relates to the technical field of artificial fish nests, and in particular to a stereoscopic artificial fish nest for promoting natural propagation of fish that lay viscid eggs in a reservoir region.

BACKGROUND

Fish are an important part of a river ecosystem, as well as an important part of aquatic biological resources and biodiversity. Affected by the development of river water conservancy and the construction of barrages, some links of fish propagation are cut off, which will affect or destroy the fish propagation, and result in a decline in fish resources. There are many types of river fish that lay viscid eggs, and their fertilized eggs need to adhere to substrates such as rocks, silts, aquatic plants or mussels to complete the embryonic development process. With scheduling of a water storage operation of a large-scale reservoir, a river habitat changes, making spawning environments required for many fish that lay viscid eggs disappear. For example, eggs laid on an aquatic plant substrate in a shallow coastal water by fish that lay eggs adhering to plants are exposed to air to dry up and die. These fish lost their natural breeding conditions, leading to a sharp decline in the number and species of fish.

At present, a general method to protect and restore fishery resources of fish that lay viscid eggs is to set up artificial fish nests in rivers and lakes to provide spawning environments for the fish that lay viscid eggs, so as to expand the spawning scale and increase their resources.

However, the previous artificial fish nests are of simple structures, are only effective for fish that lay eggs adhering to plants and use aquatic plants as an adhesion substrate, and are not suitable for fish that use rocks, silt, shells, and the like as adhesion substrates. In particular, fish using different spawning adhesion substrates have different water depth preferences. Some fish-nest ecological revetments take into account fish using different spawning adhesion substrates to a certain extent, but they are only effective for reservoirs with fairly constant water levels. For a reservoir with a great water level fluctuation, when a water level drops too fast or the water level is lower than a revetment, functions of the fish-nest ecological revetments will be unavailable, and moreover, the fish-nest ecological revetments are expensive and difficult to operate.

Therefore, there is an urgent need for an artificial fish nest for fish that lay viscid eggs and that have different preferences for spawning substrates so as to alleviate the impact of a water storage operation of a reservoir on these resources of fish that lay viscid eggs. The stereoscopic artificial fish nest for promoting natural propagation of fish that lay viscid eggs in a reservoir region of the present invention can effectively fill in the above-mentioned technical gap, can be used in specific production practices, and is of great significance to protect these resources of fish that lay viscid eggs, maintain local fishery resources, and protect the watershed biodiversity.

SUMMARY

On the basis of the foregoing description, the present invention provides a stereoscopic artificial fish nest for promoting natural propagation of fish that lay viscid eggs in a reservoir region, for solving the problem that, due to a water storage operation of a large-scale reservoir, spawning adhesion substrates for the fish that lay viscid eggs are reduced, or spawning habitats are lost, which results in a decline in resources of the fish.

A technical solution of the present invention for solving the above technical problems is as follows:

A stereoscopic artificial fish nest for promoting natural propagation of fish that lay viscid eggs in a reservoir region, characterized in that it comprises a plurality of diamond-shaped frames, wherein each diamond-shaped frame includes steel tubes and first connectors for connecting adjacent steel tubes, and second connectors for connecting the first connectors are arranged between the diamond-shaped frames so that the plurality of diamond-shaped frames form a grid structure as a whole, a floating plate is arranged inside the diamond-shaped frame to provide a buoyancy, the diamond-shaped frame is connected to ropes, sinkers are connected to bottoms of the ropes, and the ropes are provided with a plurality of scale rings.

On the basis of the above technical solution, the present invention may also be improved as follows.

Further, characterized in that the steel tubes each are provided with loop hooks, and the loop hooks are hooked with an aquatic plant substrate.

Further, characterized in that a woven basket is hung on the scale rings, the woven basket has a quadrangular frame, iron gauzes are welded onto the side and bottom of the quadrangular frame, four corners of the quadrangular frame are provided with hooks extending upwards for hooking the scale rings, and a pebble substrate is placed in the woven basket.

Further, characterized in that a sheet-iron basket is hung on the scale rings, the sheet-iron basket has a quadrangular frame, sheet iron is welded onto the side and bottom of the quadrangular frame, the sheet-iron on the side of the quadrangular frame is bent to the middle to form an edge, the bottom of the sheet-iron basket is provided with a plurality of small holes, four corners of the quadrangular frame are provided with hooks extending upwards for hooking the scale rings, and a sludge substrate is placed in the sheet-iron basket.

Further, characterized in that a mesh basket is hung on the scale rings, the mesh basket has a quadrangular frame, polyethylene meshes are stitched onto the side and bottom of the quadrangular frame, another polyethylene mesh is stitched at an edge of a top surface of the mesh basket to reduce the area of a top opening, four corners of the quadrangular frame are provided with hooks extending upwards for hooking the scale rings, and a mussel substrate is placed in the mesh basket.

Further, characterized in that a large round hole is formed in the middle of the floating plate, and a hydroponic plant basket is placed in the circular hole to grow an aquatic plant.

Further, characterized in that small round holes are formed on the periphery of the floating plate, and the small round holes and the steel tubes are fixedly bundled with ropes arranged therebetween.

Further, characterized in that each steel tube and each first connector, as well as each first connector and each second connector, are secured by means of threads, the first connector is a

Y-shaped connector, and the second connector is a linear connector.

Compared with the prior art, the technical solution of the present invention has the following beneficial effects. 1. The stereoscopic artificial fish nest has scientific and reasonable design and elegant appearance, can create an overwater landscape while constructing a spawning habitat for fish that lay viscid eggs, and has a certain ornamental value. 2. The stereoscopic artificial fish nest has strong practicability and wide application, and can be applied to various reservoirs to promote natural propagation of fish that lay viscid eggs, thereby alleviating the adverse impact of a continuous decline of the reservoir water level on hatching of viscid eggs. 3. The stereoscopic artificial fish nest has low cost, is convenient to mount and demount, can be reused, and has high operability.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a schematic structural diagram according to an embodiment of the present invention.

FIG. 2 is an enlarged view of A in FIG. 1.

FIG. 3 is an enlarged view of B in FIG. 1.

FIG. 4 is an enlarged view of C in FIG. 1.

In the figures, a list of components represented by various numerals is as follows: 1.diamond-shaped frame; 2. steel tube; 3. first connector; 4. second connector; 5. floating plate; 6. rope; 7. sinker; 8. scale ring; 9. loop hook; 10. woven basket; 11. sheet-iron basket; 12. mesh basket; 13. quadrangular frame; 14. iron gauze; 15. hook; 16. hydroponic plant basket; 17. edge; 18. small hole; 19. polyethylene mesh; 20, large round hole; 21, small round hole; and 22, aquatic plant.

DETAILED DESCRIPTION OF THE EMBODIMENTS

In order to make this application convenient to understand, this application will be described more comprehensively below with reference to the related drawings. The drawings show embodiments of this application. However, this application may be implemented in various forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the content disclosed in this application understood more thoroughly and comprehensively.

Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art that this application belongs to.

Herein, terms used in the description of this application are only for the purpose of describing specific embodiments and not intended to limit this application.

It can be understood that spatially relational terms such as "below", "under", "lower", "beneath", "above", and "upper" may be used herein for describing a relationship between one element or feature and another element or feature illustrated in the figures. It is to be understood that, in addition to the orientation shown in the figures, the spatially relational terms further include different orientations of devices in use and operation. For example, if the devices in the figures are turned over, elements or features described as being "under" or "beneath" or "below" other elements or features will be oriented to be "on" the other elements or features. Therefore, the exemplary terms "under" and "below" may include both upper and lower orientations. Moreover, the device may include otherwise orientation (such as rotation by 90 degrees or in other orientations) and the spatial descriptors used herein may be interpreted accordingly.

As shown in FIG. 1 to FIG. 4, a stereoscopic artificial fish nest for promoting natural propagation of fish that lay viscid eggs in a reservoir region includes a plurality of diamond-shaped frames 1. Each diamond-shaped frame 1 includes steel tubes 2 and first connectors 3 for connecting adjacent steel tubes 2, and second connectors 4 for connecting the first connectors 3 are arranged between the diamond-shaped frames 1 so that the plurality of diamond-shaped frames 1 form a grid structure as a whole.

Preferably, each steel tube 2 and each first connector 3, as well as each first connector 3 and each second connector 4, are secured by means of threads, the first connector 3 is a Y-type connector, and the second connector 4 is a linear connector.

A floating plate 5 is arranged inside the diamond-shaped frame 1 to provide a buoyancy. The diamond-shaped frame 1 is connected to ropes 6, sinkers 7 are connected to bottoms of the ropes 6, and the ropes 6 are provided with a plurality of scale rings 8. The diamond-shaped frame 1 can float on the water surface using the floating plate 5, and the fish nest structure may follow the movement no matter a water level rises or falls.

Specifically, a large round hole 20 is formed in the middle of the floating plate 5, and a hydroponic plant basket 16 is placed in the circular hole to grow an aquatic plant 22. A root system of the aquatic plant 22 can better attract fish to gather and lay eggs. Small round holes 21 are formed on the periphery of the floating plate 5, and the small round holes 21 and the steel tubes 2 are fixedly bundled with ropes arranged therebetween.

Preferably, the steel tubes 2 each are provided with loop hooks 9, and the loop hooks 9 are hooked with an aquatic plant substrate.

Preferably, a woven basket 10 is hung on the scale rings 8, the woven basket 10 has a quadrangular frame 13, iron gauzes 14 are welded onto the side and bottom of the quadrangular frame 13, four corners of the quadrangular frame 13 are provided with hooks 15 extending upwards for hooking the scale rings 8, and a pebble substrate is placed in the woven basket 10.

Preferably, a sheet-iron basket 11 is hung on the scale rings 8, the sheet-iron basket 11 has a quadrangular frame 13, sheet iron is welded onto the side and bottom of the quadrangular frame

13, the sheet-iron on the side of the quadrangular frame 13 is bent to the middle to form an edge 17, the bottom of the sheet-iron basket 11 is provided with a plurality of small holes 18, four corners of the quadrangular frame 13 are provided with hooks 15 extending upwards for hooking the scale rings 8, and a sludge substrate is placed in the sheet-iron basket 11. The edge 17 may 5 prevent the sludge substrate from being washed away by running water, and the small holes 18 play a role of filtering water.

Preferably, a mesh basket 12 is hung on the scale rings 8, the mesh basket 12 has a quadrangular frame 13, polyethylene meshes 19 are stitched onto the side and bottom of the quadrangular frame 13, another polyethylene mesh 19 is stitched at an edge of a top surface of the mesh basket 12 to reduce the area of a top opening, four corners of the quadrangular frame 13 are provided with hooks 15 extending upwards for hooking the scale rings 8, and a mussel substrate is placed in the mesh basket 12. The polyethylene mesh 19 is used to prevent the mussel substrate from crawling out of the mesh basket 12.

The abovementioned quadrangular frames 13 each are welded with steel bars and form frames of the woven basket 10, the sheet-iron basket 11, and the mesh basket 12.

In the solution, the diamond-shaped frames 1 are connected to one another to form a grid structure, and the ropes 6 can be connected to the bottom of each diamond-shaped frame 1 as required and can be straightened by means of the sinkers 7; a plurality of woven baskets 10, sheet-iron baskets 11 and mesh baskets 12 are hung on the ropes 6, by default, one woven basket 10, one iron basket 11 and one mesh basket 12 are hung in sequence from top to bottom, but they can be selectively matched orderly or disorderly according to the actual water conditions, or the aquatic plant substrate can be hung thereon appropriately; the ropes 6 under the adjacent diamond-shaped frame 1 can also be selectively hung with others according to the preference of fish that lay viscid eggs for adhesion substrates in water.

Claims

CONCLUSIESCONCLUSIONS

1. Een stereoscopisch kunstmatig visnest voor het bevorderen van de natuurlijke voortplanting van vis die kleverige eieren legt in een reservoirgebied, welk visnest een aantal ruitvormige frames omvat, waarbij elk ruitvormig frame stalen buizen en eerste verbindingsstukken voor het verbinden van aangrenzende stalen buizen omvat, waarbij tweede verbindingsstukken voor het verbinden van de eerste verbindingsstukken tussen de ruitvormige frames zijn geplaatst zodat het aantal ruitvormige frames als geheel een roosterstructuur vormt, waarbij een drijvende plaat binnen het ruitvormige frame is geplaatst voor het verlenen van drijfvermogen , waarbij het ruitvormige frame is verbonden aan touwen, waarbij zinkers zijn verbonden aan de uiteinden van de touwen, waarbij de touwen zijn voorzien van een aantal van schaalringen.A stereoscopic artificial fish nest for promoting the natural reproduction of fish laying sticky eggs in a reservoir area, the fish nest comprising a plurality of diamond-shaped frames, each diamond-shaped frame comprising steel pipes and first connectors for connecting adjacent steel pipes, wherein second connectors for connecting the first connectors between the diamond-shaped frames are arranged so that the plurality of diamond-shaped frames as a whole form a lattice structure, a floating plate placed inside the diamond-shaped frame for imparting buoyancy, the diamond-shaped frame being connected by ropes , where sinkers are connected to the ends of the ropes, the ropes being provided with a number of scale rings.

2. Het stereoscopische kunstmatige visnest voor het bevorderen van de natuurlijke voortplanting van vis die kleverige eieren legt in een reservoirgebied volgens conclusie 1, met het kenmerk dat de stalen buizen elk voorzien zijn van lusvormige haken, en dat de lusvormige haken aan een substraat van waterplanten gehaakt zijn.The stereoscopic artificial fish nest for promoting the natural reproduction of fish laying sticky eggs in a reservoir area according to claim 1, characterized in that the steel pipes are each provided with looped hooks, and the looped hooks are attached to a substrate of aquatic plants. be crocheted.

3. Het stereoscopische kunstmatige visnest voor het bevorderen van de natuurlijke voortplanting van vis die kleverige eieren legt in een reservoirgebied volgens conclusie 1, met het kenmerk dat een gevlochten mand aan de schaalringen is opgehangen, de gevlochten mand een vierhoekig frame heeft, ijzeren gaaswerk aan de zij- en onderkant van het vierhoekige frame is gelast, vier hoeken van het vierhoekige frame voorzien zijn van haken die zich naar boven uitstrekken voor het vasthaken van de schaalringen, en een substraat van kiezelstenen in de gevlochten mand is geplaatst.The stereoscopic artificial fish nest for promoting the natural reproduction of fish laying sticky eggs in a reservoir area according to claim 1, characterized in that a braided basket is suspended from the shell rings, the braided basket has a quadrilateral frame, iron mesh on the side and bottom of the quadrangular frame is welded, four corners of the quadrangular frame are fitted with hooks extending upwards for hooking the shell rings, and a substrate of pebbles is placed in the braided basket.

4. Het stereoscopische kunstmatige visnest voor het bevorderen van de natuurlijke voortplanting van vis die kleverige eieren legt in een reservoirgebied volgens conclusie 1, met het kenmerk dat een plaatijzeren korf aan de schaalringen is gehangen, de plaatijzeren korf een vierhoekig frame heeft, plaatijzer aan de zij- en onderkant van het vierhoekige frame is gelast, het plaatijzer aan de zijkant van het vierhoekige frame naar het midden toe is gebogen om een rand te vormen, de bodem van de plaatijzeren mand is voorzien van een aantal kleine gaatjes, vier hoeken van het vierhoekige frame zijn voorzien van zich naar boven uitstrekkende haken voor het vasthaken van de schaalringen, en een slibsubstraat in de plaatijzeren mand is geplaatst.The stereoscopic artificial fish nest for promoting the natural reproduction of fish laying sticky eggs in a reservoir area according to claim 1, characterized in that a sheet iron basket is hung on the shell rings, the sheet iron basket has a quadrilateral frame, sheet iron on the side and bottom of the quadrilateral frame is welded, the sheet iron on the side of the quadrilateral frame is bent toward the center to form an edge, the bottom of the sheet iron basket has a number of small holes, four corners of the quadrangular frames are provided with upwardly extending hooks for hooking the scale rings, and a sludge substrate is placed in the sheet iron basket.

5. Het stereoscopische kunstmatige visnest voor het bevorderen van de natuurlijke voortplanting van vis die kleverige eieren legt in een reservoirgebied volgens conclusie 1, met het kenmerk dat een gaasmand is opgehangen aan de schaalringen, de gaasmand een vierhoekig frame heeft, polyethyleen mazen aan de zijkant en de onderkant van het vierhoekige frame zijn vastgenaaid, een ander polyethyleen gaas aan een rand van een bovenzijde van de maasmand is vastgenaaid om het oppervlak van een boven gelegen opening te verkleinen, vier hoeken van het vierhoekige frame zijn voorzien van haken die zich naar boven uitstrekken voor het vasthaken van de schaalringen, en een mosselsubstraat is in de maasmand geplaatst.The stereoscopic artificial fish nest for promoting the natural reproduction of fish laying sticky eggs in a reservoir area according to claim 1, characterized in that a mesh basket is suspended from the shell rings, the mesh basket has a quadrilateral frame, polyethylene meshes on the side and the bottom of the quadrangular frame are sewn together, another polyethylene mesh is sewn to an edge of a top of the mesh basket to reduce the area of an opening above, four corners of the quadrangular frame are fitted with hooks extending upwards extend for hooking the shell rings, and a mussel substrate is placed in the mesh basket.

6. Het stereoscopische kunstmatige visnest voor het bevorderen van de natuurlijke voortplanting van vis die kleverige eieren legt in een reservoirgebied volgens conclusie 1, met het kenmerk dat in het midden van de drijvende plaat een groot rond gat is gevormd, en een hydroponische plantenmand in het ronde gat is geplaatst om een waterplant te laten groeien.The stereoscopic artificial fish nest for promoting the natural reproduction of fish laying sticky eggs in a reservoir area according to claim 1, characterized in that a large round hole is formed in the center of the floating plate, and a hydroponic plant basket in the round hole is placed to grow a water plant.

7. Het stereoscopische kunstmatige visnest voor het bevorderen van de natuurlijke voortplanting van vis die kleverige eieren legt in een reservoirgebied volgens conclusie 1, met het kenmerk dat kleine ronde openingen aan de omtrek van de drijvende plaat zijn gevormd, en de kleine ronde openingen en de stalen buizen met touwen die daartussen zijn geplaatst vast zijn gebundeld.The stereoscopic artificial fish nest for promoting the natural reproduction of fish laying sticky eggs in a reservoir area according to claim 1, characterized in that small round openings are formed on the periphery of the floating plate, and the small round openings and the steel pipes with ropes placed between them are firmly bundled.

8. Het stereoscopische kunstmatige visnest voor het bevorderen van de natuurlijke voortplanting van vis die kleverige eieren legt in een reservoirgebied volgens conclusie 1, met het kenmerk dat elke stalen buis en elke eerste verbindingsstuk, evenals elk eerste verbindingsstuk en elk tweede verbindingsstuk door middel van draden zijn vastgemaakt, het eerste verbindingsstuk een Y-vormig verbindingsstuk is, en het tweede verbindingsstuk een lineair verbindingsstuk is.The stereoscopic artificial fish nest for promoting the natural reproduction of fish laying sticky eggs in a reservoir area according to claim 1, characterized in that each steel pipe and each first connector, as well as each first connector and each second connector are connected by wires are attached, the first connector is a Y-shaped connector, and the second connector is a linear connector.