Deep sea submerging type net cage culture fish fingerling screening device and deep sea submerging type net cage culture fish fingerling screening method

Abstract

The invention relates to the technical field of deep sea net cage culture fish fingerling screening, in particular to a deep sea submerging type net cage culture fish fingerling screening device and a deep sea submerging type net cage culture fish fingerling screening method. A deep sea submerging type net cage culture fish fingerling screening device comprises a net cage and a control device, a bearing rope is arranged on the net cage, the control device is connected with the bearing rope, and an underwater camera and a water environment factor monitor are arranged in the net cage. According to the system, the condition in the net cage is observed through the underwater camera, the change of water environment factors in the net cage is monitored through the water environment factor monitor, the floating speed of the net cage is adjusted through the control device, the staying time of each safety staying station is recorded by arranging the safety staying station marks, and the stress response condition of fishes is observed. And the purpose of screening the deep and far sea submerged net cage cultured fish fingerlings is achieved by combining the change of water environment factors, the death rate of fishes and whether the net cage can normally grow after submerging and floating up.

Description

Technical Field

[0001] The present invention relates to the technical field of deep-sea cage culture fish species screening, and in particular to a deep-sea submerged and floating cage culture fish species screening device and method. Background Art

[0002] In my country, offshore cage aquaculture is mainly distributed in inner bays and sheltered seas with certain windbreaks. With the rapid development of cage aquaculture for decades, offshore aquaculture has approached saturation, with high aquaculture density, environmental degradation, frequent diseases, and ecological and environmental pressure. It is urgent to expand aquaculture space to the open sea. Deep-sea aquaculture is an important direction for the development of green fisheries. Deep-sea aquaculture generally refers to open sea areas with a water depth of more than 30m, completely out of the protection of windbreaks, with strong winds and rough waves, high water exchange rate, good water quality, and high requirements for aquaculture facilities.

[0003] Since deep-sea submersible floating cage aquaculture equipment is mostly used in open seas with more extreme weather such as typhoons, the cages need to dive to avoid typhoons. The pressure at different water depths is different, and the regulation of the amount of gas in the swim bladder of fish with swim bladders is a slow process. If the floating speed is too fast, the gas in the swim bladder will expand beyond the fish's tolerance limit, which will have fatal consequences for the fish. In addition, dissolved oxygen, water temperature, water flow, etc. at different water depths all cause different stress responses to fish. Whether fish can resist the rapid changes in these water environment factors is the first step in selecting fish species for deep-sea submersible floating cage aquaculture. Summary of the invention

[0004] The purpose of the invention is to solve the problems existing in the prior art. The present invention provides a screening device which can control the floating rate of the cage through a control device, set a safe stop station and a stay time to observe the stress response of fish, and combine various factors such as changes in water environmental factors, fish mortality rate and whether the fish can grow normally after diving and floating in the cage, so as to achieve the purpose of screening deep-sea submerged and floating cage cultured fish species.

[0005] In order to solve the problems existing in the prior art, the present invention adopts the following technical solutions:

[0006] A deep-sea submerged floating cage culture fish screening device comprises a cage and a control device, wherein a load-bearing rope is arranged on the cage, and the control device is connected to the load-bearing rope.

[0007] An underwater camera and a water environment factor monitor are arranged in the cage. The underwater camera is used to observe the situation in the cage, and the water environment factor monitor is used to monitor water environment factors such as water temperature, flow rate and dissolved oxygen in the cage.

[0008] As an improvement on the technical solution of the deep-sea submerged and floating cage culture fish fingerling screening device of the present invention, the load-bearing rope is arranged at the center position of the top of the cage, and a safety stop station mark is arranged on the load-bearing rope.

[0009] As an improvement on the technical solution of the deep-sea submerged and floating cage culture fish species screening device of the present invention, the cage is in the shape of a cuboid or a cube.

[0010] As an improvement on the technical solution of the deep-sea submerged and floating cage culture fish species screening device of the present invention, a direction adjustment rope is arranged at the top corner of the upper part of the cage.

[0011] As an improvement of the technical solution of the deep-sea submerged and floating cage culture fish fingerling screening device of the present invention, the cage includes a metal frame and a net, and the net is draped outside the metal frame.

[0012] A method for screening fish species cultured in deep-sea submerged floating cages, using the deep-sea submerged floating cages screening device as described above, comprises the following steps:

[0013] The cage is sunk into the deep sea. After staying there for several days, the load-bearing rope is pulled to pull the cage up. During the buoyancy process, the behavior of the fish is observed through underwater cameras, and the water environment factors such as water temperature, flow rate and dissolved oxygen in the cage are monitored through water environment factor monitors.

[0014] During the ascent, the system stops at different water depths and records the corresponding water environment indicators such as water temperature, flow rate and dissolved oxygen at the depths.

[0015] After the cages float to the surface, observe the condition of the fish, record the mortality rate of the fish, and culture them on the water surface for a period of time to observe whether the fish can grow normally.

[0016] As an improvement of the technical solution of the deep-sea submerged floating cage culture fish species screening method of the present invention, the cage is sunk to 35m underwater; the load-bearing rope is pulled by the control device to pull the cage up at a rate not greater than 2m / min.

[0017] As an improvement of the technical solution of the deep-sea submerged floating cage culture fish species screening method of the present invention, a safety stop mark is set on the load-bearing rope to mark the stop depth and stay for different time at different stop depths. The stop depth and stay time are as follows:

[0018] Stop depth: 25m, stop time>=5min;

[0019] Stop depth: 20m, stop time>=8min;

[0020] Stop depth: 15m, stop time>=15min;

[0021] Stop depth: 10-5m, stop time >= 20min.

[0022] As an improvement of the technical solution of the method for screening fish species in deep-sea submerged and floating cage culture of the present invention, there are 3-5 days of typhoon avoidance time on typhoon days, and the cages begin to float after 3-5 days in the deep sea.

[0023] Beneficial effects of the present invention:

[0024] In the present invention, the situation in the cage is observed by an underwater camera, and the changes of water environmental factors in the cage are monitored by a water environmental factor monitor. The buoyancy rate of the cage is adjusted by a control device, and the stay time of each safety stop is recorded by setting a safety stop mark, and the stress response of the fish is observed. In combination with the changes in water environmental factors, the mortality rate of the fish, and whether the cage can grow normally after diving and floating, the purpose of screening deep-sea submerged and floating cage cultured fish species is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 It is a schematic diagram of the structure of the present invention after omitting the net.

[0027] Explanation of the reference numerals: 1-net cage; 2-load-bearing rope; 3-underwater camera; 4-water environmental factor monitor; 5-safety stop station mark; 6-direction adjustment rope; 7-metal frame; 8-net. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and beneficial effects of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] The deep-sea submersible and floating cage culture fish species screening device of the present invention is generally operated on a deep-sea culture platform, and the staff performs the sinking or floating operation of the cage 1 on the deep-sea culture platform.

[0030] like Figure 1 As shown, a deep-sea submerged floating cage culture fish species screening device includes a cage 1 and a control device. The cage 1 is provided with a load-bearing rope 2, and the control device and the load-bearing rope 2 are connected.

[0031] An underwater camera 3 and a water environment factor monitor 4 are arranged in the cage 1. The underwater camera 3 is used to observe the situation in the cage 1, and the water environment factor monitor 4 is used to detect water environment factors such as water temperature, flow rate and dissolved oxygen in the cage 1.

[0032] In the present invention, the main weight of the net cage 1 is borne by the load-bearing rope 2, that is, the effect of pulling the net cage 1 down and floating up is achieved by the tightness of the load-bearing rope 2, and the depth of the net cage 1 in the deep sea is adjusted by pulling the load-bearing rope 2 through the control device, and the floating speed of the net cage 1 is adjusted by pulling the load-bearing rope 2 through the control device. Preferably, the load-bearing rope 2 is set at the center of the top of the net cage 1, and when the net cage 1 is pulled up, the balance of the net cage 1 can be ensured as much as possible. The load-bearing rope 2 is provided with a safety stop mark 5, and the depth of the net cage 1 in the deep sea is marked by the safety stop mark 5.

[0033] When the cage 1 is placed in the deep sea, the staff can observe the situation inside the cage 1 through the underwater camera 3, and monitor the water environment factors such as water temperature, flow rate and dissolved oxygen in the cage 1 through the water environment factor monitor 4. When in use, under the joint action of the underwater camera 3 and the water environment factor monitor 4, it stays at different water depths for a certain period of time to observe the stress response of fish, and combines the changes in the water environment, the mortality rate of fish and whether the fish can grow normally after the cage 1 dives and floats, so as to achieve the purpose of screening deep-sea submersible and floating cages 1 for aquaculture, and solve the problems existing in the prior art.

[0034] The net cage 1 comprises a metal frame 7 and a net 8 . The net 8 is draped over the metal frame 7 . The metal frame 7 forms a supporting frame of the net cage 1 . The net 8 can prevent fish from escaping from the net cage 1 .

[0035] Preferably, the cage 1 is in the shape of a rectangular parallelepiped or a cube, and the underwater camera 3 is placed at the center of the top of the cage 1, which can ensure that the underwater camera 3 can fully capture the situation inside the cage 1, and the water environment factor monitor 4 is placed in the middle of the cage 1, which can avoid the water environment factor monitor 4 from shaking due to the flow of seawater during monitoring, thereby affecting the water environment factor monitor 4 in monitoring the water environment.

[0036] As an embodiment of the present invention, one end of the load-bearing rope 2 is bound to the middle position of the top of the metal frame 7, and the other end is connected to the control device. The underwater camera 3 is fixed at the center position of the inner surface of the top of the metal frame 7 by a conventional connection method, and the water environment factor monitor 4 is fixed below the underwater camera 3 by a conventional connection method and is placed in the middle position of the metal frame 7.

[0037] More preferably, a direction adjusting rope 6 is provided at the top corner of the upper part of the net cage 1. Due to the effect of the ocean current, the net cage 1 often deviates to one side. Under the effect of the direction adjusting rope 6, when the net cage 1 is in the process of floating up, the direction of the net cage 1 can be slowly corrected during this process.

[0038] The present invention adjusts the buoyancy rate of the cage 1 through a control device, and marks the water depth of each safety stop station by setting a safety stop station mark 5, and records the stay time at the water depth, observes the stress response of the fish, and combines the changes in water environmental factors, the mortality rate of the fish, and whether the cage 1 can grow normally after diving and floating, so as to achieve the purpose of screening deep-sea submerged and floating cage 1 cultured fish species.

[0039] The working principle of the deep-sea submerged floating cage culture fish species screening device of the present invention is to sink the cage 1 to a specified depth, pull the main rope 2 through the control device, and pull the cage 1 through the main rope 2 to make the cage 1 float up, and control the rate of pulling the cage 1 up through the control device. During the floating process, it stays at different water depths, and the corresponding water depth can be marked by the safety stop station mark 5, and the residence time of the cage 1 at the water depth can be recorded. The water environment factor monitor 4 monitors the water temperature, flow rate, dissolved oxygen and other water environment factors at the water depth, and the underwater camera 3 takes pictures of the situation at the water depth. The direction of the cage 1 can also be adjusted by the direction adjustment rope 6. After the cage 1 floats to the surface, the state of the fish is observed, the mortality rate is recorded, and the fish are cultured on the water surface for a period of time to observe whether the fish can grow normally.

[0040] As an embodiment of the deep-sea submerged cage culture fish species screening device of the present invention, it includes a square metal frame 7, and the size of the metal frame 7 can be set as needed, generally 2m*2m*2m, and the outer surface of the metal frame 7 is provided with a net 8. The top center position of the metal frame 7 is provided with a load-bearing rope 2 that bears the main weight and a direction adjustment rope 6 arranged at the top corner position. Through the direction adjustment rope 6, the cage 1 is prevented from leaning to one side under the action of the ocean current, that is, the cage 1 is slowly returned to the right position during the floating process to maintain the stability of the cage 1. An underwater camera 3 is arranged at the top center position inside the cage 1, and the shooting direction of the underwater camera 3 can clearly see the activity range of the fish inside the cage 1 as a standard. In addition, a water environment factor monitor for monitoring water flow, water temperature, dissolved oxygen and other water environments is also arranged at the center position of the cage.

[0041] When in use, the net cage sinks quickly to a specified depth by its own weight. In the present invention, the depth within 35m is taken as an example. According to the requirement of 3-5 days of typhoon avoidance, the net cage 1 starts to float after 3-5 days of adaptation in the water.

[0042] The operator first pulls the main rope to float the cage 1. During the floating process, the cage 1 floats at a rate not exceeding 2 m / min. At the same time, the behavior of the fish in the cage 1 is observed through the underwater camera 3, and during the floating process of the cage 1, a stopover is set. The depth and stay time of the stopover are shown in Table 1 below, and environmental indicators such as water flow rate, temperature and dissolved oxygen at different stopover depths are recorded; when the cage 1 floats out of the water, the state of the fish is observed, the mortality rate is recorded, and the fish are cultured on the water surface for a period of time to observe whether the fish can grow normally, so as to realize the selection of farmed fish species.

[0043] The present invention also provides a method for screening fish species cultured in deep-sea submerged and floating cages, using the deep-sea submerged and floating cages screening device, the method comprises the following steps:

[0044] The net cage 1 is sunk into the deep sea, and the main rope 2 is pulled to pull the net cage 1 up. During the upswing, the behavior of the fish is observed through the underwater camera 3, and the water environment factors such as water temperature, flow rate and dissolved oxygen in the net cage 1 are monitored through the water environment factor monitor 4;

[0045] During the ascent, the system stops at different water depths and records the corresponding water environment factors such as water temperature, flow rate, and dissolved oxygen at that depth.

[0046] After the cage 1 floats to the surface, the state of the fish is observed, the mortality rate of the fish is recorded, and the fish are cultured on the water surface for a period of time to observe whether the fish can grow normally.

[0047] Taking the case of a typhoon as an example, there is a 3-5 day shelter time required during a typhoon, and the cage 1 starts to float up after 3-5 days in the deep sea area.

[0048] As an embodiment of the method for screening fish species cultured in deep-sea submerged floating cages of the present invention, the cage 1 is sunk to 35m underwater, the load-bearing rope 2 is pulled by the control device, and the cage 1 is floated up at a speed of no more than 2m / min. During the process of the cage 1 floating up, the behavior of the fish is observed by the underwater camera 3, and the fish stay at multiple stopovers with safety stopover marks 5, and the water environment data such as flow rate, water temperature and dissolved oxygen at multiple stopovers and the stay time are recorded respectively. After the cage 1 floats up to the surface, the state of the fish is observed, the mortality rate is recorded, and the fish are cultured on the water surface for a period of time to observe whether the fish can grow normally, so as to achieve the purpose of screening fish species cultured in deep-sea submerged floating cages 1. Among them, the water depth and the stay time at the safety stopover are shown in Table 1, which is a record table of the depth, stay time and floatation rate of the safety stopover of the cage 1 floating up in a water depth of 35m.

[0049]

[0050]

[0051] Table 1

[0052] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

Claims

1. A deep-sea submerged floating cage culture fish screening device, comprising a cage and a control device, wherein a load-bearing rope is provided on the cage, and the control device is connected to the load-bearing rope, characterized in that: An underwater camera and a water environment factor monitor are arranged in the cage. The underwater camera is used to observe the situation in the cage, and the water environment factor monitor is used to monitor water environment factors such as water temperature, flow rate and dissolved oxygen in the cage.

2. The deep-sea submerged and floating cage culture fish species screening device according to claim 1 is characterized in that: The load-bearing rope is arranged at the center position of the top of the net cage, and a safety stop mark is arranged on the load-bearing rope.

3. The deep-sea submerged and floating cage culture fish species screening device according to claim 1 is characterized in that: The net box is in a rectangular parallelepiped or cube shape.

4. The deep-sea submerged and floating cage culture fish species screening device according to claim 3 is characterized in that: A direction adjusting rope is arranged at the top corner of the upper part of the net box.

5. The deep-sea submerged and floating cage culture fish species screening device according to claim 1 is characterized in that: The net box comprises a metal frame and a net, and the net is draped outside the metal frame.

6. A method for screening fish species for deep-sea submerged and floating cage culture, characterized in that: The use of the deep-sea submerged and floating cage culture fish fingerling screening device as described in any one of claims 1 to 5 comprises the following steps: The cage is sunk into the deep sea. After staying there for several days, the load-bearing rope is pulled to pull the cage up. During the buoyancy process, the behavior of the fish is observed through underwater cameras, and the water environment factors such as water temperature, flow rate and dissolved oxygen in the cage are monitored through water environment factor monitors. During the ascent, the system stops at different water depths and records the corresponding water environment indicators such as water temperature, flow rate and dissolved oxygen at the depths. After the cages float to the surface, observe the condition of the fish, record the mortality rate of the fish, and culture them on the water surface for a period of time to observe whether the fish can grow normally.

7. The method for screening fish species for deep-sea submerged and floating cage culture according to claim 6, characterized in that: The cage sinks to 35m underwater; the load-bearing rope is pulled by the control device to pull the cage up at a rate not exceeding 2m / min.

8. The method for screening fish species for deep-sea submerged and floating cage culture according to claim 7, characterized in that: A safety stop mark is set on the load-bearing rope to mark the stop depth and stay for different times at different stop depths. The stop depth and stop time are as follows: Stop depth: 25m, stop time>=5min; Stop depth: 20m, stop time>=8min; Stop depth: 15m, stop time>=15min; Stop depth: 10-5m, stop time >= 20min.

9. The method for screening fish species for deep-sea submerged and floating cage culture according to claim 6, characterized in that: There is a 3-5 day shelter period during a typhoon, and the cages will begin to float after being in the deep sea for 3-5 days.

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