CN216931287U - Be used for prosthetic purse seine device of submerged plant - Google Patents

Be used for prosthetic purse seine device of submerged plant Download PDF

Info

Publication number
CN216931287U
CN216931287U CN202220565993.7U CN202220565993U CN216931287U CN 216931287 U CN216931287 U CN 216931287U CN 202220565993 U CN202220565993 U CN 202220565993U CN 216931287 U CN216931287 U CN 216931287U
Authority
CN
China
Prior art keywords
channel
inlet
seine
outlet
passage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202220565993.7U
Other languages
Chinese (zh)
Inventor
操瑜
邓兆林
李伟
支永威
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan Botanical Garden of CAS
Original Assignee
Wuhan Botanical Garden of CAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuhan Botanical Garden of CAS filed Critical Wuhan Botanical Garden of CAS
Priority to CN202220565993.7U priority Critical patent/CN216931287U/en
Application granted granted Critical
Publication of CN216931287U publication Critical patent/CN216931287U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Abstract

The utility model relates to the technical field of water environment restoration, in particular to a purse seine device for restoring submerged plants. The purse seine device provided by the utility model comprises a purse seine and a fish channel, wherein submerged plants are planted in the purse seine; the fish passage comprises an inlet passage and an outlet passage; the inlet of the inlet channel is arranged in the purse net, the outlet of the inlet channel is connected with the inlet of the outlet channel, and the outlet of the outlet channel is connected with the purse net and leads to the outer side of the purse net; the inlet to the inlet channel is wider than its outlet and the inlet to the outlet channel is narrower than its outlet. According to the seine device, the fishes are transferred to the outside of the recovery area by virtue of the autonomous activities of the fishes, so that the cost for artificial fishing of the fishes from the recovery area and reproduction is reduced, and the interference of the artificial fishing process on the growth of submerged plants is avoided; is beneficial to adaptation of the submerged plants to the habitat of natural lakes, smoothly realizes the recovery of the submerged vegetation and achieves the purposes of water quality purification and ecological restoration.

Description

Be used for prosthetic purse seine device of submerged plant
Technical Field
The utility model relates to the technical field of water environment restoration, in particular to a purse seine device for restoring submerged plants.
Background
Submerged plants are an important component of the lake ecosystem and are important primary producers providing food sources and habitats for fish and other consumers in lakes. The submerged plant has a purifying function on lake water environment and can inhibit the growth of planktonic algae. The submerged plants have an important ecological restoration function, the submerged plants are luxuriant, the stable clear water stability can be maintained, the water quality is kept clear, the aquatic products are abundant, the physical and chemical indexes of the water body are relatively stable, and if the submerged plants die, the water quality is turbid, plankton and benthonic animals are rare, and the ecological environment of the water body is relatively fragile.
The recovery or reconstruction of submerged vegetation is often used as a core technology in water environment protection and ecological management such as eutrophication management, black and odorous water body management, lake water body ecological restoration, wetland restoration and the like. When the submerged plant community is restored or rebuilt, the aquatic plant species which are suitable for the environment and have developed root systems, strong tillering capacity (especially strong root tillering capacity), strong pollution resistance and decontamination capacity, strong water purification capacity and large biomass are selected according to the ecological habits (temperature, water depth, substrate, transparency, hydrodynamic characteristics and the like) of the aquatic plants, so that sufficient attachment surface area is provided for microorganism attachment, and endogenous pollution is reduced through the effects of nutrition absorption, biological detention, water flow slowing, substrate sludge fixation and the like of the aquatic plants.
The recovery of submerged vegetation is usually improved by means of artificial strengthening measures, and the submerged vegetation is usually recovered by means of purse nets and fence devices. However, in a closed enclosure system, herbivorous (omnivorous) fishes and benthic fishes can exert a certain habitat pressure on the growth and recovery of submerged plants, and the success of aquatic vegetation restoration is influenced. The regulations of fishing prohibition in the Yangtze river basin for ten years are also very difficult to implement for artificial fishing. The utility model provides a purse seine device which can effectively reduce the gnawing and habitat damage of aquatic animals such as fishes to submerged plants.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a purse net device, which reduces the gnawing of herbivorous aquatic animals and the damage of benthic fishes to the habitat when carrying out community restoration of submerged plants in the purse net.
The purse seine device provided by the utility model can reduce the damage of fishes or other aquatic animals to submerged vegetation. Specifically, the purse seine device provided by the utility model comprises a purse seine and a fish channel, wherein submerged plants are planted in the purse seine; the fish passage comprises an inlet passage and an outlet passage; the inlet of the inlet channel is arranged in the purse net, the outlet of the inlet channel is connected with the inlet of the outlet channel, and the outlet of the outlet channel is connected with the purse net and leads to the outer side of the purse net; the inlet channel is wider than its outlet and the inlet of the outlet channel is narrower than its outlet.
More specifically, in the seine device provided by the utility model, the inlet channel is a hollow circular truncated cone, the inlet of the inlet channel is formed by a wide-mouth circular ring, the outlet of the inlet channel is formed by a narrow-mouth circular ring, and the inlet channel further comprises an inlet channel fishing net connecting the wide-mouth circular ring and the narrow-mouth circular ring; the inlet channel outlet is connected with the discharge channel; the discharge channel is connected with the purse net and leads to the outside of the purse net.
In the purse net device provided by the utility model, the discharge channel consists of a discharge channel inlet, a discharge channel outlet and a discharge channel fishing net, and the discharge channel fishing net is connected with the discharge channel inlet and the discharge channel outlet; the inlet of the discharge channel is narrower than the outlet thereof, and the outlet is trumpet-shaped.
In the seine device provided by the utility model, the fish channel further comprises a peripheral fishing net, and the peripheral fishing net surrounds and seals the outer side of the inlet channel and the outer side of the outlet channel.
In the purse net device provided by the utility model, the inlet of the inlet channel is arranged at the inner side of the purse net, and the outer side of the inlet channel is provided with a line for fixing the inlet, so that the contact area between the fish channel and the aquatic animals is enlarged.
In one embodiment of the utility model, the seine device comprises two or more fish passages; the outlet of the discharge channel of the previous fish channel is connected to the inlet of the intake channel of the next fish channel. More specifically, in the seine arrangement, the fish passage consists of a first inlet passage, a first discharge passage, a second inlet passage and a second discharge passage.
When using a seine apparatus comprising two fish passages, aquatic animals in the seine are discharged outside the seine via the first inlet passage, the first discharge passage, the second inlet passage and the second discharge passage.
As a specific embodiment of the utility model, the fish channel is provided, wherein the length of an inlet channel is 100cm, the diameter of an inlet channel is 60cm, and the diameter of an outlet channel is 20 cm; the length of the discharge channel is 50cm, the diameter of the inlet is 20cm, the purse seine is quadrilateral, the length is 10-100m, and the width is 10-100 m.
When the submerged plants are planted for river or lake ecological restoration, the inlet of the fish channel is arranged in the purse net, and the outlet of the fish channel is connected with the purse net and leads to the outside of the purse net. Submerged plants are planted in the purse net, and the whole fish channel is positioned in a submerged plant planting area; when the fishes enter the submerged plant planting area, the fishes move by themselves and enter the fish channel, and due to the special structures of the inlet channel and the discharge channel in the fish channel, the inlet is large, the outlet is small, and the net outflow of the fishes can be kept. Once the fishes enter the fish channel, the fishes can only flow in a single direction and are discharged out of the purse net through the inlet channel and the discharge channel, namely, the fishes originally in the planting area are far away from the submerged plant planting area.
The utility model has the beneficial effects that:
according to the seine device, the fishes are transferred to the outside of the recovery area by virtue of the autonomous activities of the fishes, so that the cost for artificial fishing of the fishes from the recovery area and reproduction is reduced, and the interference of the artificial fishing process on the growth of submerged plants is avoided; is beneficial to the adaptation of the submerged plants to the habitat of natural lakes, smoothly realizes the recovery of the submerged vegetation and achieves the purification of water quality and ecological restoration.
Drawings
Figure 1 is a schematic view of the inlet and outlet passages of a seine apparatus provided in accordance with the present invention; wherein 21 is an inlet channel, 211 is an inlet channel fishing net, 212 is an inlet channel inlet, and 213 is an inlet channel outlet; the discharge passage 22 is a fishing net with a discharge passage 221.
Fig. 2 is a schematic view of two closely connected fish passages of a seine apparatus provided by the present invention; wherein 23 is a peripheral fishing net; 24 is a line fixing the inlet.
Figure 3 is a schematic view of a seine apparatus of the present invention; wherein 1 is a purse net and 2 is a fish passage.
Detailed Description
The following examples are intended to illustrate the utility model, but are not intended to limit the scope of the utility model. It is intended that all modifications or alterations to the methods, procedures or conditions of the present invention be made without departing from the spirit and substance of the utility model.
Unless otherwise specified, the experimental materials, reagents, instruments and the like used in the examples of the present invention are commercially available; unless otherwise specified, all technical means in the examples of the present invention are conventional means well known to those skilled in the art.
Example 1 Fish walkway in seine installations
This embodiment provides a schematic view of the fish passage in the seine installation, see fig. 1, 2 and 3.
The fish passageway 2 comprises an inlet passageway 21, an outlet passageway 22 and a peripheral net 23. Specifically, the outside of the inlet 212 of the inlet channel and the outside of the outlet of the discharge channel are enclosed by the peripheral net 23.
The inlet channel 21 is a hollow round table and consists of an inlet channel inlet 212, an inlet channel outlet 213 and an inlet channel fishing net 211 connecting the inlet channel inlet 212 and the inlet channel outlet 213; the inlet channel outlet 213 is connected to the outlet channel 22.
As an embodiment of the utility model, the inlet channel inlet 212 comprises a wide-mouthed annular ring and the inlet channel outlet 213 comprises a narrow-mouthed annular ring.
The entry passage 21 is placed inside the seine 1 and outside the entry passage entrance 212 there are lines 24, 24 being fixed entrances through which the area of the fish passage in contact with the aquatic animals can be enlarged.
The discharge channel 22 consists of a discharge channel fishing net 221, and the discharge channel 22 is connected with the seine 1 and leads to the outside of the seine 1.
Example 2 seine apparatus comprising multiple fish corridors
The seine device provided by the utility model can contain two or more fish channels, and two closely connected fish channels are usually used for providing channels for fishes in a submerged plant growing area. Usually, every 100 square meters of submerged plant growing area is increased, two closely connected fish channels are required.
In one embodiment of the utility model, the seine units comprise two closely connected fish passages, as shown in fig. 2.
When the purse net device comprises two fish channels, the outlet of the discharge channel of the previous fish channel is connected with the inlet of the inlet channel of the next fish channel; more specifically, the fish passage consists of a first inlet passage, a first discharge passage, a second inlet passage and a second discharge passage.
When using a seine apparatus comprising two fish passages, aquatic animals in the seine are discharged outside the seine via the first inlet passage, the first discharge passage, the second inlet passage and the second discharge passage.
Embodiment 3 the seine device is used for submerged plant planting
The embodiment provides the application of the seine device in submerged plant planting. Specifically, the seine device used in the present embodiment has a seine length of 10m, a width of 10m, and an area of 100m2。
The seine apparatus used in this example contains two fish passages, schematically shown in figure 3. The submerged plants planted in this embodiment are hydrilla verticillata, meretrix and dartsia, and the fish channel is placed on the left side of the seine in this embodiment.
The seine device can obviously improve the survival rate of submerged plants, and the large-arrowhead algae can be stored inside and outside the seine due to the tolerance of the fish to take foodHowever, the biomass of the large-arrowroot algae outside the seine device is low, and the biomass of the large-arrowroot algae outside the seine is 250g/m2(ii) a The biomass of the macrorrhiza algae in the purse seine is 360g/m2. The hydrilla verticillata and the picrasma spinosum only survive in the purse net device, wherein the biomass of the hydrilla verticillata in the purse net is 300g/m2(ii) a The biomass of the Dendranthema indicum in the purse seine is 450g/m2The purse seine device provided by the utility model is proved to be capable of remarkably improving the survival rate of submerged plants.
The biomass data of the macrobrachium nipponensis, the hydrilla verticillata and the picrasma spinosum prove that the seine device provided by the utility model can transfer aquatic animals from the inside of the seine to the outside of the seine. Therefore, when the submerged vegetation is recovered ecologically, the purse net device provided by the utility model can reduce and eliminate the interference of fishes in the submerged vegetation recovery area.
Furthermore, the fish transferred to the outside of the purse net (aquatic plant growing area) has no damage, so the purse net device provided by the utility model can transfer the fish to the outside of the recovery area (aquatic plant growing area) by means of the autonomous activity of the fish on the premise of not damaging aquatic organisms such as the fish.
Although the utility model has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the utility model. Accordingly, such modifications and improvements are intended to be within the scope of the utility model as claimed.

Claims (10)

1. A purse seine device for submerged plant restoration is characterized by comprising a purse seine and a fish channel, wherein submerged plants are planted in the purse seine; the fish passage comprises an inlet passage and an outlet passage; the inlet of the inlet channel is arranged in the purse net, the outlet of the inlet channel is connected with the inlet of the outlet channel, and the outlet of the outlet channel is connected with the purse net and leads to the outer side of the purse net; the inlet channel entrance is wider than its exit and the outlet channel entrance is narrower than its exit.
2. The seine apparatus according to claim 1, characterized in that the fish passageway further comprises a peripheral fishing net enclosing the outside of the entrance of the entry passageway and the outside of the exit passageway.
3. Seine unit according to claim 2, characterized in that outside the entrance to the passage there is provided a line for fixing the entrance, enlarging the contact area of the fish passage with the aquatic animals.
4. The seine apparatus according to claim 3, wherein the entryway consists of an entryway entrance, an entryway exit and an entryway fishing net connecting the entryway entrance and the entryway exit;
the discharge passage consists of a discharge passage inlet, a discharge passage outlet and a discharge passage fishing net, and the discharge passage fishing net is connected with the discharge passage inlet and the discharge passage outlet.
5. A seine apparatus according to any one of claims 1-4, characterized in that the seine apparatus comprises two or more fish passages; the outlet of the discharge channel of the previous fish channel is connected to the inlet of the intake channel of the next fish channel.
6. Seine apparatus according to claim 5, characterized in that the fish passageway in the seine apparatus is composed of a first inlet passageway, a first discharge passageway, a second inlet passageway and a second discharge passageway.
7. Seine apparatus according to claim 6, characterized in that the length of the entry passage in the fish passage is 60-100cm, the diameter of the entry passage entrance is 50-70cm and the diameter of the entry passage exit is 10-20 cm.
8. Seine apparatus according to claim 7, characterized in that the ratio of the lengths of the inlet channel and the outlet channel is (1-2): 1.
9. seine apparatus according to claim 8, characterized in that the length of the discharge channel in the fish passage is 30-55cm and the diameter of the entrance of the discharge channel is 10-40 cm.
10. The seine apparatus according to claim 9, characterized in that the seine is quadrilateral, 10-100m long and 10-100m wide.
CN202220565993.7U 2022-03-15 2022-03-15 Be used for prosthetic purse seine device of submerged plant Active CN216931287U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202220565993.7U CN216931287U (en) 2022-03-15 2022-03-15 Be used for prosthetic purse seine device of submerged plant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202220565993.7U CN216931287U (en) 2022-03-15 2022-03-15 Be used for prosthetic purse seine device of submerged plant

Publications (1)

Publication Number Publication Date
CN216931287U true CN216931287U (en) 2022-07-12

Family

ID=82294699

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202220565993.7U Active CN216931287U (en) 2022-03-15 2022-03-15 Be used for prosthetic purse seine device of submerged plant

Country Status (1)

Country Link
CN (1) CN216931287U (en)

Similar Documents

Publication Publication Date Title
Rogers et al. Ammonia removal in selected aquaculture water reuse biofilters
CN204400695U (en) Water ecology repair system
CN103070130A (en) System and method for purifying and circularly utilizing water in fish aquaculture pond
CN113213710A (en) Seawater factory greenhouse aquaculture penaeus vannamei tail water treatment system and method
CN110950436A (en) Seawater pond culture tail water treatment system and method
Arulampalam et al. Water quality and bacterial populations in a tropical marine cage culture farm
Boxaspen Geographical and temporal variation in abundance of salmon lice (Lepeophtheirus salmonis) on salmon (Salmo salar L.)
Beveridge et al. Aquaculture and the environment
CN216931287U (en) Be used for prosthetic purse seine device of submerged plant
Tepe et al. Treatment of effluents from fish and shrimp aquaculture in constructed wetlands
CN109650546A (en) A kind of method of method and water purifying based on Daphnia magna removal water body cyanobacteria
KR20200103282A (en) Environmentally friendly Biofloc seahorse culture technology
CN116076425A (en) Fully-closed circulating water intensive culture system for prawns and culture method thereof
CN110352900A (en) A kind of aquatic ecological culturing system with interior cycle water processing function
CN113697961B (en) Reconstruction method of artificial wetland for pond water body
CN114304018A (en) River crab ecological breeding system and method
CN113620431A (en) Method for constructing river and lake stable three-dimensional water ecological food chain
Davies et al. Effects of tide on zooplankton community of a tributary of upper bonny estuary, Niger Delta, Nigeria
CN207525106U (en) Inland sea farming system
CN201160417Y (en) Fish pond with biological purification system
Pierrenia et al. The Effectiveness of Three Biofilter Media on Total Ammonia Nitrogen (TAN) Removal and Survival Rate of Tilapia Gift Seeds (Oreochromis niloticus) in Recirculation Aquaculture System
Ernst Design and operation of a hatchery for seawater production of tilapia in the Caribbean
CN110759469A (en) Shrimp and rice irrigation water self-purification system capable of efficiently discharging sewage in shrimp pond
JPH0351479B2 (en)
Tian et al. Land-based intensive aquaculture systems

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant