Anti-scratch coral clump imitating net for live fish cultured in deep and far sea

Abstract

The utility model relates to a coral clump imitating net for preventing bruise of live fish cultured in deep and far sea, and belongs to the field of fishery transportation or culture, the coral clump imitating net comprises an air stone or sinker, a main rope and biological villus, one end of the air stone is connected with an inflation device, the other end of the air stone is connected to the main rope, or the sinker is connected to the main rope, and the biological villus is densely distributed on the periphery of the main rope. The device simulates coral clumps, and the problem of fish body surface damage caused by stress clustering, rapid swimming, uneven oxygen supply and the like of fishes to the environment in the deep and far sea transfer or culture process can be solved.

Description

[0001] This utility model claims the priority of the patent with the patent number "2023113608692_" and the patent title "An anti-abrasion device and usage method for live fish in deep-sea and far-sea aquaculture" applied on October 20, 2023. Technical Field

[0002] This invention belongs to the field of fishery transportation or aquaculture, and particularly relates to a coral reef-like net for preventing abrasion of live fish in deep-sea and far-sea aquaculture. Background Art

[0003] 90% of China's seawater aquaculture is concentrated on land-based and inshore areas. With the development of the economy and society and the increasing requirements for the ecological environment, the space for seawater aquaculture has been severely squeezed, resulting in increasingly prominent problems such as excessive aquaculture density, environmental deterioration, and frequent diseases. Therefore, at this stage, China's seawater aquaculture urgently needs to develop in a more scientific and standardized direction, expanding from traditional land-based ponds, industrialized farming, and inshore cages, rafts, bottom sowing, and hanging cage farming models to deep-sea and far-sea areas, constructing new deep-sea and far-sea aquaculture models such as gravity cages, engineered enclosures, truss cages, and aquaculture vessels, and promoting and completing industrial transformation and upgrading. Deep-sea and far-sea aquaculture has become an important way to expand the space for seawater aquaculture, relieve the pressure on the inshore ecological environment, optimize the industrial layout, and achieve the sustainable development of seawater aquaculture.

[0004] Compared with inshore aquaculture, deep-sea and far-sea aquaculture is far from the shoreline and requires supporting live fish transport ships to transfer aquaculture seedlings from land-based bases or small inshore fishing raft cages to large deep-sea and far-sea aquaculture facilities such as deep-water cages, engineered enclosures, and aquaculture vessels through long-distance transportation. During the long-distance transfer process, fish need to withstand the sloshing, noise, and crowding stress from the transport ship, which may cause their body surfaces to be easily abraded and damaged, and even cause serious injuries. For some fish that are easily affected by external environmental changes, such as water temperature and sea conditions, it may cause physiological discomfort in fish, thereby affecting the survival rate. The fish body is easily damaged during the transfer process, affecting the survival rate and appearance. When fish are transported, they need to be loaded into the cabins of live water ships, and due to the sudden increase in density, they are frightened and rub against each other, resulting in abrasions.

[0005] During the process of deep-sea and far-sea aquaculture, such as gravity cages, truss cages, and engineered enclosures. These large deep-sea and far-sea aquaculture facilities are far from the shoreline, with limited artificial aquaculture intervention means and being greatly affected by natural environmental conditions. For example, sudden changes in water temperature, typhoons, and other drastic natural environmental changes may cause stress responses, mutual friction, and friction with netting materials in fish, resulting in abrasions.

[0006] These injuries not only affect the survival rate of fish, but also reduce their commercial value and affect their competitiveness in the market. Based on this, it is necessary to invent an anti-abrasion device during the transportation of live fish to reduce the surface injuries of live fish during transportation and thus improve their transportation survival rate. Summary of the Invention

[0007] In view of the above technical problems, the present invention provides a coral reef-like net for preventing abrasion of live fish in deep-sea aquaculture. The device imitates a coral reef and avoids abrasion between individuals by simulating fish swimming through the coral reef, so as to reduce the problems of stress aggregation, rapid swimming of fish caused by uneven oxygen supply, and surface injuries of fish during deep-sea transportation or aquaculture.

[0008] The technical solution of the present invention is realized as follows:

[0009] An anti-abrasion device for live fish in deep-sea aquaculture, the device includes an air stone or a sinker, a main cable, and biological villi. One end of the air stone is connected to an inflation device, and the other end is connected to the main cable, or the sinker is connected to the main cable, and biological villi are densely distributed on the outer circumference of the main cable.

[0010] Further, the length of the biological villi is set according to the specifications of the fish so that the fish can hide therein.

[0011] Further, the main cable is made of a soft material or a hard material.

[0012] Further, the main cable is hollow, made of a soft material, and has air holes. The gas in the air stone comes out through the air holes on the main cable to inflate the water body. This situation is used for the transportation of live fish.

[0013] Further, the main cable is composed of a hard solid material, and the sinker is connected to the main cable. This situation is used for deep-sea cage aquaculture.

[0014] The present invention also provides a method for transporting live fish in deep-sea aquaculture using the above device. The method is to arrange a plurality of the devices in a vertical column as a group of coral reef-like nets, and then multiple nets form a coral reef in the aquaculture water body in the transportation cabin. The distance between adjacent two main cables and the length of the biological villi are determined according to the specifications of the transportation object. During transportation, the inflation device is turned on, and the air stone is used to inflate. The main cable with biological villi is distributed at the other end of the air stone, and an oxygen-rich water body is formed around the main cable. The transported fish will be distributed in the biological villi, reducing collisions and abrasions.

[0015] Further, the distance between adjacent two main cables is 2 times the body width of the fish, and the length of the biological villi is 1.5 times the body width of the fish.

[0016] The present invention also provides a method for deep - sea cage aquaculture using the said device. The method is as follows: Arrange a plurality of the said devices in a vertical column to form a group of coral - like netting. Then, multiple nets form coral clusters in the deep - sea aquaculture cage. The distance between adjacent main cables and the length of the biological villi are determined according to the specifications of the aquaculture object. The sinkers are connected to the main cables, and biological villi are arranged on the main cables. The fish cultured in the cage will be distributed among the biological villi, reducing the collisions and abrasions caused by wind and waves.

[0017] Further, the distance between adjacent main cables is 2 times the body width of the fish, and the length of the biological villi is 1.5 times the body width of the fish.

[0018] Further, the said coral - like netting is arranged inside the cage and distributed around the cage in a circle.

[0019] Advantages of the present invention compared with the prior art:

[0020] (1) During the transportation of fish for deep - sea aquaculture using the device of the present invention, by connecting an air stone to the main cable, the water body around the main cable is rich in oxygen, thus attracting fish to gather around the main cable and hide in the biological villi, reducing the collisions and abrasions during transportation. During the deep - sea cage aquaculture using the device of the present invention, the sinkers are connected to the main cables, and the main cables are supported by rigid materials, standing straight in the aquaculture cage. The cultured fish hide in the biological villi, and the dense biological villi around the main cables reduce the collisions and abrasions caused by wind and waves.

[0021] (2) The biological villi used in the present invention are biological materials, which have the characteristics of inhibiting bacterial growth, being not easy to attach, and being easy to clean. Each monomer is detachable, and the villi are rinsed reversely with medium - high - speed water flow to achieve the purpose of cleaning.

[0022] (3) According to different aquaculture water bodies, two types of main cable materials, soft and hard, are provided for selection. For example, in long - term fixed aquaculture water bodies such as aquaculture cages, hard main cable materials can be used. The sinkers or air stones at the bottom of the device can be adsorbed on the bottom of the cabin by magnets or fixed on the bottom of the aquaculture environment through perforated net plates to ensure that the water flow or the movement of the aquaculture object does not affect the designed interval; in scenarios where the volume is not fixed, such as live - fish transfer hanging bags, soft main cable materials can be provided. The soft main cable can be directly connected to devices with unfixed volumes such as hanging bags. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Front view of the device of the present invention;

[0024] Figure 2 Schematic structural diagram of the device of the present invention, A is the front view, and B is the top view;

[0025] Figure 3 Schematic application structural diagram of the device of the present invention;

[0026] Figure 4 Schematic diagram of the main cable spacing determined by the device of the present invention; the length of the biological villi is 1.5d;

[0027] Figure 5 Schematic diagram of the device of the present invention in the buoyant cage mode;

[0028] Figure 6 Schematic diagram of the device of the present invention in the truss mode;

[0029] Figure 7 Schematic diagram of the device of the present invention in the engineering fence mode;

[0030] 1. Biological villi, 2. Main cable, 3. Air stone, 4. Sinker, 5. Netting, 6. Coral-like net, 7. Cultured water body. Detailed implementation manners

[0031] The technical solution of the present invention will be further explained below through embodiments, but the protection scope of the present invention is not limited by any form of the embodiments.

[0032] The materials and dimensions of the device for preventing abrasion of live fish in deep-sea and far-sea aquaculture in the following embodiments are as follows:

[0033] Material of biological villi: Nylon 612 (PA612). Nylon 612 is a nylon filament with relatively high quality, having low water absorption, better recovery and wear resistance than nylon 66. In addition, nylon 612 has properties such as anti-mildew and antibacterial, and is often used in the food, medical, and electronic related industries.

[0034] Dimensions: Solid main cable, the diameter of the main cable is 0.5 cm, and the diameter of the biological villi is 1 cm;

[0035] Hollow main cable, the hollow diameter is 0.5 cm, the outer diameter of the main cable is 1 cm, and the diameter of the biological villi is 1 cm;

[0036] Embodiment 1

[0037] A device for preventing abrasion of live fish in deep-sea and far-sea aquaculture, as Figure 1-2 shown, the device includes an air stone 3, a main cable 2 and biological villi 1. One end of the air stone 3 is connected to an air inflation device, and the other end is connected to the main cable 2. The outer circumference of the main cable 2 is densely distributed with biological villi.

[0038] During use, the spacing between adjacent main cables is 2 times the body width of the fish, and the length of the biological villi is 1.5 times the body width of the fish, as Figure 4 shown. In this embodiment, the device is used to transport large yellow croakers with an average weight of 400 g, a total length of 35 cm, and a body width of 4 cm. The single water tank specification of the transport ship is 20 m * 10 m * 4 m, and the transport density is 50 kg / m 3Transported from the aquaculture cage to the shore. Therefore, the length of the biological fluff is 6 cm and the diameter is 0.5 cm, enabling the large yellow croaker to hide therein. The main cable used is made of PVC material that can stand upright and has a certain flexibility, with a length of 4 m. The biological fluff is arranged in a circular pattern on the main cable, with 8 holes in each circle, 6 fluff in each hole, and the ring spacing is 0.5 cm.

[0039] The main cable is hollow and densely distributed with air holes. The gas in the air stone comes out through the air holes on the main cable to inflate the transportation water body.

[0040] A method for transporting large yellow croaker using the device. The method is to arrange 120 of the devices in a vertical column as a group of coral reef-like nets. Set 240 coral reef-like nets in the aquaculture water body in the transportation cabin to form a coral reef. The distance between adjacent main cables is 4 cm. During transportation, turn on the inflation device to inflate through the air stone. The main cable with biological fluff is distributed at the other end of the air stone. Since the gas in the main cable makes the water body around the main cable rich in oxygen, the transported fish will hide in the biological fluff, reducing collisions and abrasions.

[0041] Example 2

[0042] An anti-abrasion device for cultivating live fish in the deep sea. The device includes sinkers, a main cable, and biological fluff. The sinkers are connected to the main cable, and the outer circumference of the main cable is densely distributed with biological fluff, as Figure 3 shown.

[0043] In this example, the device is used in the gravity buoyancy cage for groupers. Since groupers are fast-swimming fish, during the aquaculture production process, collisions often occur between fish or abrasions are caused by rubbing against the netting during typhoon disasters. Therefore, the device of the present invention is set in the aquaculture cage. This example uses a gravity cage with a perimeter of 80 m and a depth of 30 m; the size of the groupers is an average weight of 150 g, a body length of 15 cm, and a body width of 2 cm. The length of the biological fluff is 3 cm and the diameter is 1.5 cm, enabling large-sized groupers to hide therein. The main cable used is made of PVC hard pipe, with a length of 30 m.

[0044] As Figure 5 shown, arrange 20 of the devices in a vertical column as a group of coral reef-like nets 6. Set 2600 coral reef-like nets in the aquaculture water body 7 inside the circular netting 5 to form a coral reef. The distance between the main cables is 3 cm. During the aquaculture process, the fish will hide in the biological fluff, reducing collisions and abrasions.

[0045] Example 3

[0046] An anti-abrasion device for culturing live fish in the deep and far sea. The device includes sinkers, main cables, and biological villi. The sinkers are connected to the main cables, and the outer circumference of the main cables is densely covered with biological villi.

[0047] In this embodiment, the device is used in a truss-type cage for culturing sea bass. Since sea bass are relatively fierce and slender in body shape, during the cultivation process, especially during the lifting and lowering of the truss cage, they will have relatively strong stress behaviors, resulting in abrasions. Therefore, the device of the present invention is set in the truss-type cage. As Figure 6 shown, this example uses a self-elevating truss-type cage with a length of 25 meters, a width of 25 meters, and a height of 15 meters; the sea bass has a specification of 300 g, a body length of 30 cm, and a body width of 6 cm. The length of the villi is 9 cm and the diameter is 1.5 cm, enabling sea bass of this specification to hide therein. The main cable used is made of PVC hard pipe and has a length of 15 m.

[0048] Arrange 5 of the said devices in a vertical column as a group of coral reef-like nets 6, and then combine 210 coral reef-like nets into a coral reef-like wall (the distance between adjacent main cables is 12 cm), and set it around the truss cage to form a buffer barrier to prevent sea bass from rubbing against the netting. During the cultivation process, the cultured fish will hide in the biological villi, reducing collisions and abrasions.

[0049] Example 4

[0050] An anti-abrasion device for culturing live fish in the deep and far sea. The device includes sinkers, main cables, and biological villi. The sinkers are connected to the main cables, and the outer circumference of the main cables is densely covered with biological villi.

[0051] In this embodiment, the device is used in a large-scale deep-sea pipe pile enclosure for culturing spotted knifejaw. Usually, the engineering enclosure is fixed in the deep and far sea area with good water quality, so it will be affected by stronger natural factors such as tides, ocean currents, and wind waves. Spotted knifejaw is a relatively large-sized marine fish, and they are not very suitable for long-distance rapid swimming. They are better at lurking and preying in habitats such as coral reefs and rock crevices. Therefore, a 1-meter-wide coral reef-like protection wall is set inside the enclosure to deal with the occurrence of abrasions caused by spotted knifejaw ramming the netting under special conditions. Since the engineering enclosure is driven piles into the seabed with the seabed as the bottom of the enclosure, considering issues such as the seawater exchange volume, the design interval of this device needs to be appropriately increased.

[0052] As Figure 7 shown, this embodiment uses an engineered enclosure with a perimeter of 160 m; the spotted knifejaw has an average weight of 1000 g, a body length of 30 cm, and a body width of 8 cm. The length of the biological villi is 12 cm and the diameter is 2 cm, enabling large-sized spotted knifejaw to hide therein. The main cable used is made of PVC hard pipe and has a length of 10 m, and the distance between adjacent main cables is 16 cm, forming a coral reef-like net 6.

Claims

1. A coral-like net for preventing scratches on live fish in deep sea aquaculture, characterized in that: The simulated coral net is composed of an anti-abrasion device, which includes an air stone or a sinker, a main line and biological villi. One end of the air stone is connected to the inflation device and the other end is connected to the main line, or the sinker is connected to the main line. The periphery of the main line is densely covered with biological villi. The main line is hollow and has air vents. The gas in the air stone comes out through the air vents on the main line to inflate the water. A plurality of the devices are arranged in a vertical row to form a group of simulated coral nets. The spacing between two adjacent main lines is twice the width of the fish body, and the length of the biological villi is 1.5 times the width of the fish body.

2. The coral-like net for preventing scratches on live fish in deep sea aquaculture according to claim 1, characterized in that: The main structure is made of soft material or hard material.

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