Fish viscous egg spawning induction and incubation device

Abstract

The utility model discloses a fish adhesive egg spawning induction incubation device which comprises a spawning net cage, the spawning net cage is in a cuboid or cube shape, four vertical edges of the spawning net cage are respectively connected with a spawning net cage fixing rod, and the spawning net cage is unfolded and vertically fixed in a pond or a water body of the pond through the four spawning net cage fixing rods. A fish inlet is formed in one side of the oviposition net cage, a fish outlet is formed in the opposite side of the oviposition net cage, and a mesh fish nest is installed in the oviposition net cage; an egg receiving bottom net of which the area is larger than that of the bottom of the egg laying net cage is additionally sewed at the bottom of the egg laying net cage; the egg receiving bottom net is connected with egg receiving bottom net fixing rods which are used for unfolding and fixing the egg receiving bottom net in the pond or a water body of the pond. According to the fish viscous egg spawning induction and hatching device, spawning induction and hatching operation of viscous egg fishes can be efficiently completed in a limited water body space, viscous egg particles are prevented from being scattered and densely distributed at the bottom of a pond, labor consumption can be effectively reduced, the hatching rate of the fish eggs can be increased, and the loss risk of fish fry in pond separation and pond transfer can be increased.

Description

Technical Field

[0001] The utility model relates to the technical field of aquaculture devices, in particular to a fish sticky egg incubation device. Background Art

[0002] In recent years, with the continuous rise of my country's aquaculture industry, it has shown a blowout development trend. It is facing the situation of reduced natural fish resources and the situation of increasingly reduced water resources for hatching and healthy breeding of fry. Artificial breeding of fry has become the fundamental solution to the current development of aquaculture. At present, the traditional hatching method generally adopts the method of arousing broodstock to spawn, and the spawning is naturally laid on water plants. The water plants serve as the hatching nest of fish eggs. This kind of fish nest is part of the natural plant. First, it is not convenient for large-scale industrial centralized application. The greater disadvantage is that the water plants are only suitable for natural spawning of fish. The density of fish eggs naturally spawned on water plants is low, and the yield of fry is small, which directly affects the planned commercial seedling operation. It has become a key technology restricting the production of fry and restricting fishery production.

[0003] In order to obtain high-quality fry more efficiently, a semi-artificial proliferation method is adopted, in which spawning broodstock and artificial fish nests are placed in the spawning pool water body. The method mainly involves injecting spawning drugs into the selected broodstock with good maturity, and then placing them in the spawning pool water body with a certain water level together with the palm fish nests used to stick the eggs. The broodstock are allowed to mate and lay eggs on their own, and then hatch on the fish nests. The hatched fry are divided into pools or transferred to ponds for cultivation. Some sticky fish egg hatching nests have also been reported in public literature, and the excerpts are quoted as follows:

[0004] 1. Chinese Patent: A Viscous Fish Egg Spawning Cage with Ramie Silk, Application No.: 201620135230.3, Application Date: 2016.02.23, Abstract: The utility model discloses a Viscous Fish Egg Spawning Cage with Ramie Silk, characterized in that the cage is rectangular, a pulling rope is tied to each of the four corners of the cage, the pulling rope is tied to the insertion rod, a horizontal support, a hanging rope and ramie silk are arranged in the cage, and the cage is used to hold the fish eggs. The cage is set near the shore of a pond or a river or lake, and ramie silk is spread in the cage like water grass. Male and female broodstock that are ready to give birth after induced spawning are placed in the cage. The broodstock lay eggs and are fertilized in the cage. The eggs adhere to the ramie silk, and excess eggs adhere to the cage wall and the bottom, which will not cause the loss of eggs. Since the cage space is relatively small, the contact opportunities between male and female broodstock are increased, and the fertilization rate and hatching rate of sticky eggs can be improved. The utility model is simple to set up, has good effects, and is worthy of promotion.

[0005] 2. Chinese Patent: A floating sticky fish egg attachment base, application number: 201620729847.8, application date: 2016.07.13, abstract: The utility model discloses a floating sticky fish egg attachment base, which is characterized in that the attachment base is composed of a float, a connecting rope, a vertical main pole, a support pole, a polyethylene mesh, and a sinker; when the attachment base of the utility model is used, after the attachment base is assembled, it is placed in the fish breeding waters during the fish spawning period, and the attachment base floats in the fish breeding waters through the buoyancy of the float, and the fish adhere to the polyethylene mesh after being laid and hatched autonomously. Since the floating sticky fish egg attachment base is not fixed, the fish eggs on the attachment base can obtain more dissolved oxygen in the floating of the attachment base, thereby improving the hatching rate of the sticky fish eggs; the utility model is simple in design, easy to use, and has good effect, and has promotion value.

[0006] 3. Chinese patent: Special fish nest for hatching sticky fish eggs, application number: 200910185941.6, application date: 2009.12.15, abstract: The present invention relates to a special fish nest for hatching sticky fish eggs, comprising a bamboo pole (1) and a connecting rope (2), characterized in that a group of connecting ropes (2) are arranged on the bamboo pole, and a plastic wire (3) is fixedly connected to the lower end of each connecting rope. The beneficial effects of the present invention are that the manufacturing material resources are extensive, suitable for large-scale centralized production, and can be reused; the structure is simple and easy to use; the manufacturing cost is low, and the hatching survival rate is high.

[0007] Through applied research, it is found that the above disclosed technology has the following problems: the nets used to catch the broodstock after spawning are easy to scratch the eggs adhering to the bottom and inner wall of the pool, causing dead eggs; most of the sticky eggs produced by the broodstock are scattered and densely distributed on the bottom of the pool, which is easy to cause local hypoxia and large dead eggs during the hatching process; after the eggs are hatched, they often need to be divided into pools or transferred to ponds for further cultivation due to the dense space, which not only consumes manpower but also has a high risk of fish loss. Therefore, it is necessary to design a new fish sticky egg spawning incubation device. Summary of the invention

[0008] The utility model aims to provide a device for induced hatching of fish sticky eggs. The device can efficiently complete the induced hatching operation of sticky egg fish in a limited water space, avoiding the sticky eggs from being scattered and densely covering the bottom of a pond. It can not only effectively reduce the labor cost, but also improve the hatching rate of fish eggs and the risk of loss when fry are divided into ponds and transferred to other ponds.

[0009] The utility model is realized by adopting the following technical solutions:

[0010] A device for incubating fish sticky eggs comprises a spawning cage, which is in the shape of a rectangular parallelepiped or a cube. The four vertical sides of the spawning cage are respectively connected with a spawning cage fixing rod, and the four spawning cage fixing rods unfold the spawning cage and vertically fix it in a water body of a pond or a pool. A fish inlet is arranged on one side of the spawning cage, and a fish outlet is arranged on the opposite side. A mesh fish nest is installed in the spawning cage, and specifically, an opening on one side of a top cover of the spawning cage is arranged as the fish inlet, and a fish outlet is arranged below the other side; an egg receiving bottom net with an area larger than the bottom of the spawning cage is sewn at the bottom of the spawning cage, and the egg receiving bottom net is connected with an egg receiving bottom net fixing rod used for unfolding and fixing the egg receiving bottom net in the water body of the pond or the pool, and the four egg receiving bottom net fixing rods unfold the four corners of the egg receiving bottom net, and the four sides of the egg receiving bottom net are slightly higher than the four sides of the bottom of the spawning cage to form a pot bottom shape.

[0011] Further preferably, the fish outlet is sewn with a long square tube-shaped fish outlet passage made of polyethylene or nylon mesh, and the mesh size of the fish outlet passage is the same as the mesh size of the spawning cage.

[0012] Further preferred: the egg receiving bottom net is connected to the egg receiving bottom net fixing rod by a fixing rope of the egg receiving bottom net. The egg receiving bottom net adopts a polyethylene mesh with a mesh size of 40 meshes, which is sewn to the bottom of the spawning cage and is 125% larger than the bottom area of ​​the spawning cage. The spawning cage is located at the center of the egg receiving bottom net. The four corners of the egg receiving bottom net and the four corners of the bottom of the spawning cage sewn with the egg receiving bottom net are all provided with fixing ropes of the egg receiving bottom net.

[0013] Further preferably, the spawning cage is connected to the spawning cage fixing rod by tying the spawning cage fixing rope.

[0014] Further preferred: the spawning cage is a rectangular or cubic cage made of polyethylene or nylon mesh, its depth does not exceed 1 meter, and egg cage fixing ropes are left at the four corners of the top. The mesh size of the spawning cage is close to the head width of the spawning parent fish and ensures that they cannot escape from it.

[0015] Further preferred: the mesh fish nest comprises two parallel arranged support rods, and a plurality of fish nest meshes are connected between the two support rods. The fish nest mesh is made of 9-mesh polyethylene mesh, and the sagging width does not exceed 40 cm. Two adjacent fish nest meshes are spaced 30 cm apart on the support rods. When in use, the mesh fish nest as a whole extends into the inside of the spawning cage from the fish inlet of the spawning cage, and the two ends of the two support rods are respectively mounted on the two spawning cage fixing rods at the four corners of the spawning cage.

[0016] The device for inducing the laying and hatching of fish sticky eggs adopts a spawning cage with a mesh fish nest inside to temporarily raise parent fish, can assist the laying by means of water flow, most of the produced sticky fish eggs are adhered to the mesh fish nest, and the mesh fish nest can be taken out from the fish inlet of the spawning cage and set up in other waters for hatching, so as to avoid the need for timely separation of ponds or transfer to ponds for continued cultivation after the fish eggs are hatched and emerged due to being too dense; an egg-catching bottom net is sewn at the place of the spawning cage, and the egg-catching bottom net is used to catch the scattered fish eggs, so as to avoid the sticky eggs from being scattered on the bottom of the pond and causing local hypoxia and large dead eggs; a fish outlet is arranged on the opposite side of the fish inlet of the spawning cage, and the fish outlet is connected with a fish outlet channel, so that the parent fish can be caught and transferred out of the pond or pool through the fish outlet channel, so that the parent fish and the fish eggs are separated, and a good water environment is created for the hatching of the fish eggs attached to the spawning cage and the egg-catching bottom net. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the placement structure of the device for inducing the incubation of fish sticky eggs;

[0018] Figure 2 It is a schematic diagram of the structure of the spawning cage;

[0019] Figure 3 It is a structural diagram of a mesh fish nest;

[0020] Figure 4 It is a structural schematic diagram of the egg receiving bottom net;

[0021] The names corresponding to the numbers in the figure are:

[0022] 1. Fixing rod of bottom net for egg-receiving; 2. Bottom net for egg-receiving; 3. Fixing rope of bottom net for egg-receiving; 4. Fish outlet; 5. Spawning cage; 6. Fixing rod of spawning cage; 7. Fish nest with mesh; 8. Fish outlet; 9. Fish inlet; 10. Supporting rod; 11. Fish nest mesh; 12. Fixing rope of spawning cage. DETAILED DESCRIPTION

[0023] In order to describe the present technology more clearly, the present technology is further described in detail below with reference to the accompanying drawings and embodiments. Example

[0024] A device for accelerating the laying and hatching of fish sticky eggs comprises a spawning net cage 5, wherein the spawning net cage 5 is in a rectangular or cubic shape, and the four vertical sides of the spawning net cage 5 are respectively connected with a spawning net cage fixing rod 6, and the four spawning net cage fixing rods 6 unfold the spawning net cage 5 and vertically fix it in the water body of a pond or a pool, a fish inlet 9 is arranged on one side of the spawning net cage 5, and a fish outlet 8 is arranged on the opposite side, and a mesh fish nest 7 is installed in the spawning net cage 5; an egg receiving bottom net 2 with an area larger than the bottom of the spawning net cage 5 is sewn at the bottom of the spawning net cage 5, and the egg receiving bottom net 2 is connected with an egg receiving bottom net fixing rod 1 for unfolding and fixing the egg receiving bottom net 2 in the water body of a pond or a pool, and the four egg receiving bottom net fixing rods 1 unfold the four corners of the egg receiving bottom net 2, and the four sides of the egg receiving bottom net 2 are slightly higher than the four sides of the bottom of the spawning net cage, forming a pot bottom shape. After the broodstock finishes spawning, the fish inlet 9 is opened, and the mesh fish nest 7 with the eggs attached is moved out of the spawning net cage 5 as a whole, and is set up in other waters for hatching. The bottom fixing rope of the mesh fish nest 7 is loosened, and the broodstock in the net cage is driven from one side of the fish inlet to the other side of the fish outlet with a long pole that exceeds the side length of the spawning net cage, and the fish outlet passage is opened to transfer the broodstock out of the pond or pool. The bottom fixing rope of the expedited hatching device is re-fixed, so that the expedited hatching device as a whole is suspended in the water body, creating a good water environment for hatching the fish eggs attached thereto.

[0025] The fish outlet 8 is sewn with a long square tube-shaped fish outlet passage 4 made of polyethylene or nylon mesh, and the mesh size of the fish outlet passage 4 is the same as the mesh size of the spawning cage 5 .

[0026] The egg receiving bottom net 2 is connected to the egg receiving bottom net fixing rod 1 by means of an egg receiving bottom net fixing rope 3. The egg receiving bottom net 2 is made of a polyethylene mesh with a mesh size of 40 meshes, which is sewn to the bottom of the spawning cage and is 125% larger than the bottom area of ​​the spawning cage. The spawning cage is located at the center of the egg receiving bottom net 2. The four corners of the egg receiving bottom net 2 and the four corners of the bottom of the spawning cage sewn with the egg receiving bottom net 2 are all provided with an egg receiving bottom net fixing rope 3.

[0027] The spawning cage 5 is connected to the spawning cage fixing rod 6 by tying with the spawning cage fixing rope 12 .

[0028] The spawning cage 5 is a rectangular or cubic cage made of polyethylene or nylon mesh, with a depth of no more than 1 meter. Egg cage fixing ropes 12 are left at the four corners of the top. The mesh size of the spawning cage 5 is preferably close to the head width of the spawning parent fish to ensure that it cannot escape from it.

[0029] The mesh fish nest 7 comprises two parallel supporting rods 10, and a plurality of fish nest meshes 11 are connected between the two supporting rods 10. The fish nest meshes 11 are made of 9-mesh polyethylene mesh, and the sagging width does not exceed 40 cm. Two adjacent fish nest meshes 11 are spaced 30 cm apart on the supporting rods 10. When in use, the mesh fish nest 7 as a whole extends into the inside of the spawning cage from the fish inlet of the spawning cage, and the two ends of the two supporting rods 10 are respectively mounted on the two spawning cage fixing rods 6 at the four corners of the spawning cage.

[0030] Application Examples

[0031] This fish sticky egg induced hatching device has been used many times in the Wuming base of Guangxi Aquatic Breeding Center in Wuming District, Nanning City, Guangxi, with good results. A fish sticky egg induced hatching device is placed in a pond with a water depth of 1.1 meters and an area of ​​2.9 acres: the spawning cage is 4×4×1 meters long, with a mesh size of 2 cm; the fish outlet channel has a diameter of 0.4×0.4 meters and a length of 1 meter; the egg receiving bottom net is 6×6 meters long and wide, with a mesh size of 40 meshes; the two bamboo poles of the arranged mesh fish nest are 4.5 meters long each, and multiple fish nest nets with a mesh size of 9 mesh and polyethylene material are hung between the two bamboo poles, with a drooping width of no more than 40 cm, and the fish nest nets are spaced about 30 cm apart to form a mesh fish nest. Before releasing the broodstock, tie a knot in the fish outlet channel of the induced hatching device to temporarily block the passage. After 60 groups of mature golden carp broodstock with an average weight of 1.06 kg / tail were injected with induced spawning, they were concentrated into the spawning cage through the fish inlet, and the fish inlet was temporarily sealed with a polyethylene net rope to prevent the broodstock from escaping. After the broodstock were put into the induced spawning hatching device, the oxygenation and water pushing equipment was turned on. On the one hand, it ensured that the broodstock had sufficient dissolved oxygen in the water, and on the other hand, a water flow was formed along the gaps between the adjacent fish nests to stimulate the broodstock to mate and lay eggs on their own; in addition, new water was added to the water body in the area where the induced spawning hatching device was located to keep the water quality fresh. One day after the broodstock were put into the induced spawning hatching device, the spawning was completed, the fish inlet was opened, and the arranged mesh fish nests with attached eggs were removed from the spawning cage as a whole, and set up in other waters for hatching. The bottom fixing rope of the induced spawning hatching device was loosened, and the broodstock in the cage was driven from one side of the fish inlet to the other side of the fish outlet with a 4.5-meter long pole, and the fish outlet channel was opened to transfer the broodstock out of the pond. The rope used to fix the bottom of the hatching device was re-fixed, so that the hatching device as a whole was suspended in the water body, creating a good water environment for the hatching of the fish eggs attached to it. After 3 days, the fish eggs attached to the hatching device hatched out of the membrane, and the total number of hatched fish eggs was estimated to be about 4.5 million.

[0032] The above description is not a limitation of the present application, and the present application is not limited to the above examples. Any changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present application should fall within the scope of protection of the present application.

Claims

1. A device for inducing the laying and hatching of fish sticky eggs, comprising a spawning cage (5), characterized in that: The spawning net cage (5) is in the shape of a rectangular parallelepiped or a cube. The four vertical sides of the spawning net cage (5) are respectively connected to a spawning net cage fixing rod (6). The four spawning net cage fixing rods (6) unfold the spawning net cage (5) and vertically fix it in the water body of a pond or a pool. A fish inlet (9) is arranged on one side of the spawning net cage (5), and a fish outlet (8) is arranged on the opposite side. A mesh fish nest (7) is installed in the spawning net cage (5). The bottom of the spawning net cage (5) is sewn with an egg receiving bottom net (2) with an area larger than the bottom of the spawning net cage (5). The egg receiving bottom net (2) is connected to an egg receiving bottom net fixing rod (1) used for unfolding and fixing the egg receiving bottom net (2) in the water body of a pond or a pool.

2. The fish sticky egg hatching device according to claim 1, characterized in that: The fish outlet (8) is sewn with a long square tube-shaped fish outlet passage (4) made of polyethylene or nylon mesh.

3. The fish sticky egg hatching device according to claim 1, characterized in that: The egg receiving bottom net (2) is tied and connected to the egg receiving bottom net fixing rod (1) via an egg receiving bottom net fixing rope (3).

4. The fish sticky egg hatching device according to claim 1, characterized in that: The spawning cage (5) is connected to the spawning cage fixing rod (6) by tying the spawning cage fixing rope (12).

5. The fish sticky egg hatching device according to claim 1 or 4, characterized in that: The spawning cage (5) is a rectangular or cubic cage made of polyethylene or nylon mesh, with a depth of no more than 1 meter, and egg cage fixing ropes (12) are left at the four corners of the top.

6. The fish sticky egg hatching device according to claim 1, characterized in that: The mesh fish nest (7) comprises two support rods (10) arranged in parallel, and a plurality of fish nest mesh sheets (11) are connected between the two support rods (10).

7. The device for accelerating the laying and hatching of fish sticky eggs according to claim 6, characterized in that: The fish nest mesh (11) is made of 9-mesh polyethylene mesh, with a drooping width of no more than 40 cm, and two adjacent fish nest meshes (11) are spaced 30 cm apart on the support rod (10).

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