Tuna roe collecting device
By designing a tuna egg collection device and using support members and counterweights to stabilize the egg collection mesh, the problem of difficulty in collecting tuna fertilized eggs is solved, and efficient collection of fertilized eggs is achieved, meeting the needs of tuna breeding.
Patent Information
- Application Number
- CN202422016353.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-19
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-08-19
AI Technical Summary
现有技术中缺乏高效的金枪鱼受精卵集卵装置,导致金枪鱼繁育工作难以进行。
A tuna egg collection device is designed, including support members, breeding mesh and egg collection mesh. The egg collection mesh and breeding mesh are set up together to set up a moving boundary, and the egg collection mesh is prevented from deforming through the counterweight body to prevent the fertilized egg from falling out.
It improves the collection efficiency of fertilized tuna eggs, reduces the probability that fertilized eggs are pushed away by the waves, increases the amount of collection each time, and meets the needs of tuna breeding.
Smart Images
Figure CN223080837U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the field of aquaculture, and particularly to the industry of tuna breeding in cage culture. Background Art
[0002] At present, the development of seawater fish tends to cage culture, especially cage culture for breeding. Cage culture for breeding has the characteristics of being environmentally friendly, high-yield, less prone to disease, and less use of medicine. Therefore, the breeding of seawater fish tends to develop cage culture for breeding. In recent years, the tuna breeding technology has been successfully broken through in China, providing a new high-value breeding species for the cage culture industry in China.
[0003] The tuna breeding cage culture industry is in its infancy. Although the tuna breeding technology has been broken through and major enterprises across the country are eager to try the tuna industry, the work of tuna fry breeding urgently needs to be broken through. Since the body size of tuna broodstock is relatively large (≥50 kg) and its special breathing method causes it unable to stop swimming, it is necessary to collect tuna fertilized eggs under the conditions of cage culture for breeding. At present, there is a lack of an efficient fertilized egg collecting device in tuna breeding work. Summary of the Utility Model
[0004] The present disclosure provides a tuna egg collecting device to at least solve the above technical problems existing in the prior art.
[0005] According to a first aspect of the present disclosure, there is provided a tuna egg collecting device, comprising: a support member configured to be able to float on the sea surface, the support member having a first opening;
[0006] A breeding net, an upper edge of the breeding net is connected to an upper edge of the support member and forms a barrel-shaped structure with a second opening at the top together with the support member;
[0007] An egg collecting net, the egg collecting net is sleeved inside the support member and the breeding net through the first opening and the second opening, an upper edge of the egg collecting net is connected to a top surface of the first opening, a lower edge of the egg collecting net is flush with a first position of the breeding net, and the egg collecting net communicates between the first opening and the bottom of the breeding net;
[0008] A counterweight, the counterweight is suspended on an inner wall of the egg collecting net for providing a blocking force to prevent the egg collecting net from deforming on its circumferential side.
[0009] In an implementable embodiment, the support member includes a support frame and a support platform extending out of the outer periphery of the support frame, an upper edge of the egg collecting net is connected to a top surface of the support frame, and an upper edge of the breeding net is connected to a top surface of the support frame.
[0010] In one implementable embodiment, the aquaculture net is circumferentially and centrally fixed at the first position to form a fixed annular structure by bundling a plurality of sinkers or counterweights and ropes. Under the influence of gravity, the aquaculture net forms a net pocket with a reduced diameter that tightens inward below the first position.
[0011] In one implementable embodiment, the counterweight is a sandbag, and the sandbag hangs above the sinker. The sandbag and the sinker make the egg-collecting net closely adhere to the aquaculture net through the action of gravity.
[0012] In one implementable embodiment, the weight of each sinker is in the range of 30 - 50 g, and each sinker is used to provide uniform gravity.
[0013] In one implementable embodiment, the upper edge of the egg-collecting net is connected to the top surface of the support frame by a rope, and the upper edge of the egg-collecting net is arranged above the sea surface.
[0014] In one implementable embodiment, the upper edge of the egg-collecting net is at least 0.8 m above the sea surface.
[0015] In one implementable embodiment, the egg-collecting net is a barrel-shaped net made of a 40 - 80 mesh net piece stitched together.
[0016] In one implementable embodiment, a plurality of counterweights are provided, and each counterweight hangs evenly inside the circumference of the egg-collecting net.
[0017] In one implementable embodiment, the counterweight hangs at a position 20 - 40 cm above the lower edge of the egg-collecting net.
[0018] The tuna egg-collecting device of the present disclosure uses the egg-collecting net and the aquaculture net to jointly enclose a boundary for the activity of tuna, which can limit the spawning action of tuna and prevent the fertilized eggs of tuna from escaping from this boundary. In addition, hanging the counterweight on the inner wall of the egg-collecting net can prevent the egg-collecting net from deforming laterally under bad weather conditions, and further prevent a longitudinal gap from forming between the lower edge of the egg-collecting net and the first position of the aquaculture net. In this way, it can prevent the fertilized eggs from escaping from the original boundary area through this gap, improve the collection efficiency of tuna fertilized eggs, reduce the probability of the fertilized eggs of tuna being washed away by the waves, and increase the collection amount of tuna fertilized eggs each time.
[0019] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present disclosure, nor is it used to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features, and advantages of the exemplary embodiments of the present disclosure will become readily understandable. In the drawings, several embodiments of the present disclosure are shown in an exemplary but non-limiting manner, where:
[0021] In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.
[0022] Figure 1 Shows a schematic structural diagram of the tuna egg collection device in an embodiment of the present disclosure with sandbags and lead weights;
[0023] Figure 2 Shows a schematic structural diagram of the support member (cultivation net cage) in the tuna egg collection device of an embodiment of the present disclosure;
[0024] Figure 3 Shows a schematic structural diagram of the cultivation netting being installed in the support member in the tuna egg collection device of an embodiment of the present disclosure;
[0025] Figure 4 Shows the installation of the egg collection netting in the tuna egg collection device of an embodiment of the present disclosure Figure 3 And the schematic structural diagram after installation.
[0026] Description of reference numerals in the figure:
[0027] 001 - Tuna egg collection device; 1 - Support member; 11 - Support frame; 12 - Support platform; 2 - Cultivation netting; 21 - First position; 3 - Egg collection netting; 4 - Sandbag; 5 - Lead weight. Detailed implementation manners
[0028] To make the objects, features, and advantages of the present disclosure more obvious and understandable, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present disclosure.
[0029] Reference Figures 1 - 4, an embodiment of the present disclosure provides a tuna egg collection device 001. At least part of the structure of the egg collection device can float on the sea surface. Meanwhile, tuna can move within the breeding area enclosed by the two-layer mesh structure of the egg collection net 3 and the breeding net 2. Moreover, the mesh holes of the egg collection net 3 are smaller than those of the breeding net 2, and the mesh holes of the egg collection net 3 are smaller than the size of the fertilized eggs, which can prevent the fertilized eggs from flowing out through the mesh holes of the egg collection net 3. Further, the upper edge of the egg collection net 3 is set higher than the sea surface, and the lower edge of the egg collection net 3 is flush with the first position 21 of the breeding net 2, which can prevent a longitudinal gap for the fertilized eggs to swim out from being formed between the upper edge of the egg collection net 3 and the sea surface, and can also prevent a longitudinal gap for the fertilized eggs to flow out from being formed between the lower edge of the egg collection net 3 and the first position 21 of the breeding net 2.
[0030] Specifically, the tuna egg collection device 001 provided by the embodiment of the present disclosure includes: a support member 1, a breeding net 2, an egg collection net 3, and a counterweight 4. The support member 1 is configured to be able to float on the sea surface, and the support member 1 has a first opening; the upper edge of the breeding net 2 is connected to the lower edge of the support member 1 and forms a barrel-shaped structure with a second opening at the top with the support member 1; the egg collection net 3 is sleeved inside the support member 1 and the breeding net 2 through the first opening and the second opening. The upper edge of the egg collection net 3 is connected to the top surface of the first opening, the lower edge of the egg collection net 3 is flush with the first position 21 of the breeding net 2, and the egg collection net 3 is communicated between the first opening and the bottom of the breeding net 2; the counterweight 4 is hung on the inner wall of the egg collection net 3 for providing a blocking force to prevent the circumferential deformation of the egg collection net 3. Exemplarily, the counterweight 4 is a sandbag.
[0031] The embodiment of the present disclosure does not limit the shapes of the first opening and the second opening, and they are kept consistent. They can both adopt circular, square or other regular or irregular shapes.
[0032] Using the egg collection net 3 and the breeding net 2 of the embodiment of the present disclosure to jointly enclose the boundary for the activity of tuna can limit that tuna and tuna fertilized eggs will not escape from this boundary. In addition, hanging the counterweight 4 on the inner wall of the egg collection net 3 can prevent the circumferential deformation of the egg collection net 3 under bad weather conditions, and further prevent a longitudinal gap from being formed between the lower edge of the egg collection net 3 and the first position 21 of the breeding net 2. In this way, it can prevent the fertilized eggs from escaping from the original boundary area through this gap, can improve the collection efficiency of tuna fertilized eggs, reduce the probability of tuna fertilized eggs being pushed away by the sea waves, and increase the collection amount of tuna fertilized eggs each time.
[0033] Specifically, the support member 1, also known as the cage, for the sake of convenience of description, the support member 1 includes a support frame 11 and a support platform 12 extending out of the outer periphery of the support frame 11. The upper edge of the egg-collecting netting 3 is connected to the top surface of the support frame 11, and the upper edge of the culture netting 2 is connected to the top surface of the support frame 11. In this way, both the egg-collecting netting 3 and the culture netting 2 can be stably connected to the support member 1.
[0034] Considering the actual assembly and application scenarios of the tuna egg-collecting device 001, the following elaborates on this solution in detail.
[0035] The tuna egg-collecting device 001 provided by the embodiments of the present disclosure includes: an egg-collecting netting 3, sandbags (or other corrosion-resistant counterweights), and lead weights 5. The egg-collecting netting 3 is tied to the upper edge of the culture cage (support member 1) by ropes. The sandbags (or other wrapable counterweights) are hung (suspended) from the upper edge of the support frame 11 by ropes. The lead weights 5 are fixed to the lower edge of the egg-collecting netting 3 by ropes. Exemplarily, the lead weights 5 can also be replaced by a structural body with a counterweight. The lower end of the culture netting 2 is tightened inward under the influence of gravity, and the diameter is reduced. The sandbags (or counterweight body 4) and the lead weights 5 make the egg-collecting netting 3 closely adhere to the culture netting 2 through the action of gravity. Among them, the lead weights 5 can keep the egg-collecting netting 3 flat and in a stretched state, and the sandbags (or counterweight body 4) can enable the egg-collecting netting 3 to have the ability to resist water flow, sea waves, and strong winds.
[0036] It should be noted that the egg-collecting netting 3 is an annular netting made of a 40-80 mesh net piece. Both the top surface and the bottom surface of the egg-collecting netting 3 are through holes, without a top cover or a bottom cover. Without a bottom cover, it can promote the exchange of water flow and keep the water quality clean. Without a top cover, it is convenient to collect fertilized eggs from above. The egg-collecting netting 3 has a pore size of 40-80 meshes, which can pass water flow, microalgae, and most plankton, ensuring smooth water flow and fresh water quality, while blocking the outflow of tuna fertilized eggs. In addition, the upper edge of the egg-collecting netting 3 is at least 1 m higher (or exposed) above the water surface (or sea surface) in the longitudinal direction, which can ensure that the fertilized eggs will not escape from above due to the action of sea waves. The lower edge of the egg-collecting netting 3 is basically flush with the bottom surface of the culture netting 2 at the first position 21, which can ensure the maximum collection of fertilized eggs. The upper edge and the lower edge of the egg-collecting netting 3 are both locked with ropes to ensure that they will not come off the line or undergo irreversible deformation.
[0037] Furthermore, the material of the sandbag (or the counterweight 4) is a canvas flood-prevention sandbag, which can ensure its firmness and durability; it is filled with sand (about 10kg) to provide a high-density content and is easy to obtain; the sandbag is tied to the upper edge of the support frame 11 with a rope to fix it; the sandbag is hung above the lower edge of the egg-collecting net 3. Exemplarily, the distance from the longitudinal position of the egg-collecting net 3 to the lower edge of the egg-collecting net 3 is 20-40cm. By using gravity ropes and sandbags, the egg-collecting net 3 can be pressed tightly against the inner wall of the breeding net 2; exemplary, at the lower edge of the egg-collecting net 3, sandbags (or counterweights 4) are tied every 5-6m to ensure uniform force distribution.
[0038] It should be noted that the lead sinker 5 is a lead sinker for fishing nets or a stainless steel sinker; the lead sinker 5 is fixed to the lower edge of the egg collecting net 3 by a rope, and a lead sinker 5 can be set every 0.5m to ensure uniform force distribution; a single lead sinker 5 weighs 30-50g to provide uniform gravity, ensuring that the egg collecting net 3 is in a naturally stretched state, and at the same time, the egg collecting net 3 will not be damaged due to excessive gravity.
[0039] The tuna egg collecting device 001 of the disclosed embodiment is assembled according to the following steps:
[0040] 1. Place the egg collecting net 3 prepared in advance on the platform around the net cage.
[0041] 2. The upper edge of the egg-collecting net 3 is gradually fixed to the upper edge of the breeding cage along a point to both sides through ropes until it is fully fixed for a week. At the same time, the length of the rope is controlled to ensure that the upper edge of the egg-collecting net 3 is about 0.8m away from the water surface.
[0042] 3. Slowly place the egg collecting net 3 into the breeding net 2 along the edge of the net cage, and shake the egg collecting net 3 to fully unfold it.
[0043] 4. Slowly lower the sandbags prepared in advance into the breeding cage along the inside of the egg-collecting net 3, control the length of the rope, and tie and fix the sandbags 20-40 cm above the lower edge of the egg-collecting net 3, one every 4-6 m.
[0044] 5. The next morning, use an egg collection net or egg collection trawl to collect the fertilized tuna eggs.
[0045] An egg collection experiment was conducted using the egg collection device of the disclosed embodiment: a breeding cage with a circumference of 80 m was used, and about 100 yellowfin tunas weighing about 50 kg were cultured. The breeding net 2 was 6 m deep, and normal induced spawning measures were taken. An egg collection net 3 with a depth of 6 m was used. An egg collection device with a sandbag (with a lead sinker 5 at the bottom) was used. The amount of fertilized eggs collected was significantly increased, and more than 196,800 eggs were harvested.
[0046] In order to compare the effect, another experiment was conducted: using an egg-collecting device without sandbags (with a lead weight 5 at the bottom), a breeding cage with a circumference of 80m, and breeding about 100 yellowfin tunas weighing about 50kg. The breeding net 2 was 6m deep, and normal induced spawning was adopted. The egg-collecting net 3 with a side depth of 6m was used. At night, the egg-collecting net 3 was easily blown away by the wind, resulting in the escape of almost all fertilized eggs, and only more than 100 eggs were harvested.
[0047] In order to compare the effect, another experiment was conducted: sand bags were added (with lead weights 5 at the bottom), but the egg-collecting net 3 was only 4m deep, the circumference of the breeding cage was 80m, and about 100 yellowfin tunas weighing about 50kg were cultured. The breeding net 2 was 6m deep, and a 4m deep egg-collecting net 3 was used. In this way, there was a gap in the longitudinal direction between the egg-collecting net 3 and the breeding net 2. Normal induced spawning was adopted, and the amount of fertilized eggs collected was very small, with only more than 1,000 eggs harvested.
[0048] Comparing the experiments of the above three scenarios, we can draw the following conclusions:
[0049] 1. It is necessary that the egg collecting net 3 and the breeding net 2 are flush at the first position 21 to avoid a gap between the two, which can increase the fertilized egg collection rate by 99%;
[0050] 2. It is necessary to install sandbags in the breeding area of the breeding cage to stabilize the egg collecting net 3 to prevent the egg collecting net 3 from being blown up, which can increase the fertilized egg collection rate by 99.9%.
[0051] In summary, the egg collecting device according to the embodiment of the present disclosure can improve the collection efficiency of tuna fertilized eggs, reduce the probability of tuna fertilized eggs being pushed away by waves, increase the collection amount of tuna fertilized eggs each time, provide more high-quality fertilized eggs for tuna artificial breeding research and production, improve scientific research and production efficiency, reduce waste, and thus improve production efficiency; the materials are convenient and easy to obtain, the production method is simple, and it is conducive to promotion.
[0052] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this disclosure can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solutions disclosed in this disclosure can be achieved, and this document does not limit this.
[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0054] As described above, this is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure can easily think of changes or substitutions, which should all be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.
Claims
1. A tuna egg collection device, characterized in that, Comprising: A support member (1), the support member (1) being configured to be able to float on the sea surface, the support member (1) having a first opening; A culture net (2), an upper edge of the culture net (2) being connected to an upper edge of the support member (1) and forming a barrel-shaped structure with the support member (1) having a second opening at the top; An egg-collecting net (3), the egg-collecting net (3) being sleeved inside the support member (1) and the culture net (2) via the first opening and the second opening, an upper edge of the egg-collecting net (3) being connected to a top surface of the first opening, a lower edge of the egg-collecting net (3) being flush with a first position (21) of the culture net (2), and the egg-collecting net (3) being communicated between the first opening and a bottom of the culture net (2); A counterweight (4), the counterweight (4) being suspended from an inner wall of the egg-collecting net (3) and configured to provide a blocking force for blocking circumferential deformation of the egg-collecting net (3).
2. The tuna egg collecting device according to claim 1, characterized in that, The support member (1) includes a support frame (11) and a support platform (12) extending out of an outer periphery of the support frame (11), an upper edge of the egg-collecting net (3) being connected to a top surface of the support frame (11), and an upper edge of the culture net (2) being connected to an inner circle of the support platform (12).
3. The tuna egg collecting device according to claim 1, characterized in that, The culture net (2) forms a fixed annular structure by being circumferentially tied and fixed at the first position (21) through a plurality of sinkers and ropes, and the culture net (2) forms a net pocket with a reduced diameter and inwardly tightened below the first position (21) under the influence of gravity.
4. The tuna egg collecting device according to claim 3, characterized in that, The counterweight (4) is a sandbag, the sandbag being suspended above the sinker (5), and the sandbag and the sinker (5) make the egg-collecting net (3) closely adhere to the culture net (2) through the action of gravity.
5. The tuna egg collecting device according to claim 3, wherein The weight of each sinker (5) is in the range of 30 - 50 g, and each sinker (5) is configured to provide uniform gravity.
6. The tuna egg collecting device according to claim 2, wherein The upper edge of the egg-collecting net (3) is connected to the top surface of the support frame (11) through a rope, and the upper edge of the egg-collecting net (3) is arranged above the sea surface.
7. The tuna egg collection device according to claim 6, wherein, The upper edge of the egg-collecting net (3) is at least 0.8 m above the sea surface.
8. The tuna egg-collecting device according to claim 1, characterized in that, The egg-collecting net (3) is a barrel-shaped net made of a 40 - 80 mesh netting stitched together.
9. The tuna egg collection device according to claim 1, wherein, A plurality of counterweights (4) are provided, and each counterweight (4) is uniformly suspended from an inner circumference of the egg-collecting net (3).
10. The tuna egg collection device according to claim 1, characterized in that, The counterweight (4) is suspended at a position 20 - 40 cm above a lower edge of the egg-collecting net (3).