Device for breeding of large-mouth bass fry and application thereof

Abstract

The application discloses a device for breeding of large-mouth bass fry and application thereof, and the device comprises a feed domestication feeding unit and a fry breeding unit; wherein the feed domestication feeding unit comprises at least one round pool, a breeding frame and a re-thrower are arranged in the round pool, the breeding frame is a spherical combined frame and is externally connected with a lifter, part of the structure of the re-thrower is embedded in the breeding frame, and a sewage discharge pipe is arranged at the bottom of the round pool; the fry breeding unit comprises a cement pool, a net cage frame and a net cage, the net cage frame is a combined structure of two semicylinders, the frame is rotationally connected with a pool ridge of the cement pool at the center of the bottom surface, and the net cage is sleeved on the semicylinders. Advantages are as follows: (1) the device saves bait by arranging the re-thrower in the breeding frame, and improves the domestication efficiency of artificial bait fry; (2) the device is convenient for fry screening, reduces the damage of fry in the screening process, and greatly reduces the labor intensity; and (3) the device is convenient for sewage cleaning, the fry breeding and production efficiency are improved, and the survival rate of fry is also significantly improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of large-mouth bass fry selection, and relates to a method for artificial feed domestication, segmented feeding and management of large-mouth bass fry and breeding of fine varieties, in particular to a large-mouth bass fry selection device and application thereof. BACKGROUND

[0002] The rapid development of large-mouth bass culture in China benefits from the application of artificial feed, and the growth and cultivation process includes opening cultivation, feed domestication cultivation, fry standardization and fish farming. At present, the artificial propagation technology of large-mouth bass has been successful, and the problem of fry opening has also been solved. However, the conversion of fry from animal feed to artificial feed and large-scale cultivation are two key factors. The survival rate of fry cultivated to 10 cm is about 15% on average, which limits the further improvement of breeding efficiency. After opening for about one week, the large-mouth bass is fed with frozen branchy or micro-particle feed. Due to the predatory nature of fry, the time between two feedings is long, which easily causes uneven feeding and sinking of feed (both micro-particle feed and frozen branchy are sinking feed). Therefore, the feeding time is long, the sinking feed is not taken again, which causes a large workload and feed waste, and the effect is not ideal. After the completion of feed conversion, there are about 3,000 fry per kilogram. At this time, due to the nature or uneven growth, it is easy to have the phenomenon of eating small fry, so the fry needs to be screened once every 3 days to ensure that fry of the same size are cultured together. During the screening of fry, the pool water needs to be drained, the net needs to be pulled to catch the fry, and manual screening is needed, which requires the cooperation of multiple people. Due to the complicated process of screening fry, the current production mode has high labor intensity and low efficiency, and it is easy to cause injury to fish and infection of bacteria, which seriously affects the survival rate and quality of fry. SUMMARY

[0003] The technical problem to be solved is to overcome the disadvantages of the prior art, that is, the low survival rate of large-mouth bass fry during artificial feed domestication and large-scale cultivation, and the difficulty in screening fry, so as to reduce the damage to fry, improve the screening and feeding efficiency, and increase the survival rate of fry. The present application provides a large-mouth bass fry selection device and application thereof.

[0004] Technical scheme: The large-mouth bass fry selection device comprises a feed domestication and feeding unit and a fry cultivation unit. The feed domestication and feeding unit comprises at least one circular pool, a cultivation frame and a re-feeding device are arranged in the circular pool, the cultivation frame is a spherical combined frame and is externally connected with a lifter, part of the structure of the re-feeding device is embedded in the cultivation frame, and a sewage discharge pipe is arranged at the bottom of the circular pool. The fry cultivation unit comprises a cement pool, a net cage frame and a net cage. The net cage frame is a combined structure of two semicylinders, the frame is rotationally connected with the pool ridge of the cement pool at the center of the bottom surface, and the net cage is sleeved on the semicylinders.

[0005] Preferably, the cultivation frame comprises a fish screen, an upper frame and a lower frame from top to bottom, and the contact edges among the three are provided with fixing ring plates, the ring plates are uniformly provided with fixing holes, and the fixing holes are connected through fixing bolts; the mesh of the fish screen is larger than that of the upper frame and the lower frame.

[0006] Preferably, the fixing ring plates between the upper frame and the lower frame are provided with shafts, and the shafts are used for connecting the lifters; the lifter comprises two fixing piles, a rotating shaft is arranged between the fixing piles, pull rings are uniformly arranged on the rotating shaft, the pull rings are connected with a carrying pole for connecting with the shafts, and the lifter controls the rotation of the rotating shaft through a motor A.

[0007] Preferably, the fixing bolt comprises a head, a spring plate and a tail, and the spring plate is clamped in the fixing hole.

[0008] Preferably, the re-casting device comprises a base, a material collecting funnel, a horn tube A, a pump pipe, a horn tube B, a long pipe and a horn mouth from bottom to top, and the upper part of the material collecting funnel is embedded in the cultivation frame; the base and the horn tube A are supported and connected by at least two small columns to form a water inlet gap; the lower edge of the material collecting funnel is matched with the upper edge of the base; a ring plate is arranged between the horn tube B and the long pipe, and a lamp tube is arranged on the ring plate.

[0009] Preferably, the pump pipe is provided with a spiral plate, the base is provided with a motor, and a magnetic rod is arranged to penetrate through the base and the horn tube A and is driven by the motor.

[0010] Preferably, the cement pool is uniformly provided with a waist shaft groove; the net cage frame comprises two semi-cylindrical structures formed by frame rods and a frame waist recessed inward between the two semi-cylindrical structures, and a waist shaft is arranged at the middle of the frame waist on the bottom surface and is rotationally connected with the waist shaft groove.

[0011] Preferably, the net cage comprises a main rein and a vice rein, the vice rein is interpenetrated to form a semi-cylindrical net structure, and small holes are left in the edge of the vice rein for the main rein to pass through; the main rein is arranged around the frame waist to fix the net cage on the net cage frame.

[0012] The device is applied in artificial feed domestication and seedling screening of large-mouth bass.

[0013] Preferably, the application comprises the following steps:

[0014] S1, the large-mouth bass fry is raised in each cultivation frame, the cultivation frame in the early domestication stage is only composed of an upper frame and a lower frame, a fish screen is installed on the cultivation frame in the late domestication stage to form a spherical net, and the spherical net is rotated to facilitate the small fry to swim out and prevent the large fry from eating the small fry; and the spherical net also plays a role in sorting seedlings, and the small fry swimming out is collected by a net cage.

[0015] S2, the artificial feeding and the method of the re-feeding device are combined to feed the artificial feed in the breeding frame. When the re-feeding device is used, the motor in the base is started to drive the magnetic rod in the base and the horn tube A, and the water in the horn tube A is rotated. The rotating water is lifted by the spiral blade in the pump pipe, so that the water at the bottom of the material collecting funnel is continuously sprayed from the horn mouth. When feeding, the artificial feeding method is used to feed the feed above the re-feeding device. When the feed falls, part of the feed is eaten by the fry, and the part not eaten is collected and lifted by the material collecting funnel, and then sprayed from the horn mouth. The cycle is repeated until the fry is eaten. When feeding, the lamp is turned on, so that the feed particles reflect light and are easily eaten by the fry;

[0016] S3, after the feeding is completed, the motor A is started to start the rotating shaft, the breeding frame is moved upwards to make the upper frame higher than the water surface, so that the density of the fry is increased, the activity of the fry under high-density conditions is increased to facilitate digestion, and the space between the fry is limited to reduce the mutual attack behavior. In addition, the breeding frame is manually pulled up by the pull ring to adjust the density of the fry in the other breeding frame.

[0017] S4, after the fry of the largemouth bass is successfully domesticated through S1-S3 steps, the fry is collected by the net cage, the main rein of the net cage is passed through the small hole of the secondary rein, and then the net cage is fixed on the net cage frame by winding around the frame waist for one turn, and then the waist shaft is clamped into the waist shaft slot, so that the net cage can rotate in the cement pool. During breeding, generally only the net cage is sleeved on the net cage frame under the water surface, and then the net cage is sleeved on the net cage frame on the water surface after a period of breeding. The net cage frame is rotated to make the clean net cage under the water surface, and the fry enters the new net cage with water. The old net cage is removed. After the cycle operation, the required fish size is cultivated.

[0018] In addition, the fish species cultivated through S4 can be returned to the breeding frame as needed, and the small size fish species is made to swim out by rotating the breeding frame, so that the large size fish species is selected.

[0019] Beneficial effects: (1) the largemouth bass fry breeding device saves bait by setting a re-feeding device in the breeding frame, and improves the domestication efficiency of artificial feed fry; (2) the device is convenient for fry screening, reduces the damage of fry in the screening process, and greatly reduces the labor intensity; (3) the device is convenient for cleaning, the survival rate of fry is improved, and the production efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is the overall structure schematic diagram of the feed domestication and feeding unit;

[0021] Figure 2 is a schematic diagram of the breeding frame structure;

[0022] Figure 3 is a schematic diagram of the upper frame structure of the breeding frame;

[0023] Figure 4 is the structure diagram of the lower frame of the breeding frame;

[0024] Figure 5 is the structure diagram of the fish screen;

[0025] Figure 6 is the structure diagram of the fixed stake;

[0026] Figure 7 is the structure diagram of the round pool;

[0027] Figure 8 is the structure diagram of the rethrower;

[0028] Figure 9 is the structure diagram of the pump pipe;

[0029] Figure 10 is the structure diagram of the whole structure of the seedling breeding unit;

[0030] Figure 11 is the structure diagram of the net cage frame;

[0031] Figure 12 is the structure diagram of the cement pool;

[0032] Figure 13 is the structure diagram of the net cage;

[0033] Wherein, 1 is the round pool, 2 is the breeding frame, 3 is the carrying rod, 4 is the pull ring, 5 is the rotating shaft, 6 is the fixed stake, 7 is the motor A, 8 is the joint shaft, 9 is the fixed ring piece, 10 is the fixed hole, 11 is the head, 12 is the elastic piece, 13 is the tail, 14 is the sewage pipe, 15 is the horn mouth, 16 is the long pipe, 17 is the horn pipe B, 18 is the pump pipe, 19 is the horn pipe A, 20 is the base, 21 is the water inlet gap, 22 is the material collecting hopper, 23 is the ring piece, 24 is the lamp tube, 25 is the spiral piece, 26 is the cement pool, 27 is the net cage frame, 28 is the net cage, 29 is the frame rod, 30 is the frame waist, 31 is the waist shaft, 32 is the waist shaft groove, and 33 is the main rein. DETAILED DESCRIPTION

[0034] The following examples further illustrate the content of the present application, but should not be understood as limiting the present application. Modifications and replacements of the method, steps or conditions of the present application, without departing from the spirit and essence of the present application, all belong to the scope of the present application. If not specifically indicated, the technical means used in the examples is the conventional means familiar to those skilled in the art.

[0035] Example 1

[0036] The device for breeding large-mouth bass fry includes a feed acclimation feeding unit and a fry breeding unit. The feed acclimation feeding unit includes at least one round pool 1, which is provided with a breeding frame 2 and a multiple feeder. The breeding frame 2 is a spherical combined frame and is externally connected with a lifter. The multiple feeder is partially embedded in the breeding frame 2. The bottom of the round pool 1 is provided with a sewage pipe 14. The fry breeding unit includes a cement pool 26, a net cage frame 27 and a net cage 28. The net cage frame 27 is a combined structure of two semicylinders, which are rotationally connected with the pool ridge of the cement pool 26 at the center of the bottom surface. The net cage 28 is sleeved on the semicylinders.

[0037] The breeding frame 2 includes a fish screen, an upper frame and a lower frame from top to bottom. Fixed ring plates 9 are arranged at the contact edges between the three frames. Fixed holes 10 are uniformly arranged on the ring plates and are connected by fixed pins.

[0038] A joint shaft 8 is arranged on the fixed ring plate 9 between the upper frame and the lower frame. The joint shaft 8 is used for connecting the lifter. The lifter includes two fixed piles 6. A rotating shaft 5 is arranged between the fixed piles 6. Pull rings 4 are uniformly arranged on the rotating shaft 5. A carrying rod 3 is connected with the pull rings 4 and is used for connecting with the joint shaft 8. The rotation of the rotating shaft 5 is controlled by a motor A 7.

[0039] The fixed pin includes a head 11, a spring plate 12 and a tail 13. The spring plate 12 is clamped in the fixed hole 10.

[0040] The multiple feeder includes a base 20, a material collecting funnel 22, a horn pipe A 19, a pump pipe 18, a horn pipe B 17, a long pipe 16 and a horn mouth 15 from bottom to top. The upper part of the material collecting funnel 22 is embedded in the breeding frame 2. The base 20 and the horn pipe A 19 are supported and connected by at least two small columns to form a water inlet gap 21. The lower edge of the material collecting funnel 22 is fitted with the upper edge of the base 20. A ring plate 23 is arranged between the horn pipe B 17 and the long pipe 16. A lamp tube 24 is arranged on the ring plate 23.

[0041] Spiral plates 25 are arranged in the pump pipe 18. A motor is arranged in the base 20. A magnetic rod is arranged in the base 20 and the horn pipe A 19 and is driven by the motor.

[0042] Waist shaft grooves 32 are uniformly arranged on the pool ridge of the cement pool 26. The net cage frame 27 includes two semicylinder structures formed by frame rods 29 and a frame waist 30 recessed inward between the two semicylinder structures. A waist shaft 31 is arranged at the middle of the frame waist 30 on the bottom surface. The waist shaft 31 is rotationally connected with the waist shaft grooves 32.

[0043] The net cage 28 includes a main rein 33 and a vice rein. The vice rein forms a semicylindrical net structure by being interpenetrated with each other. Small holes are left on the edge of the vice rein for the main rein 33 to pass through. The main rein 33 surrounds the frame waist 30 to fix the net cage 28 on the net cage frame 27.

[0044] Example 2

[0045] The device of Example 1 is used for artificial feed domestication and seedling screening of Micropterus salmoides, and the specific application method is as follows:

[0046] S1, the Micropterus salmoides fry is raised in each culture frame 2, and the culture frame 2 in the early domestication stage is only composed of an upper frame and a lower frame. In the later domestication stage, a fish screen is installed on the culture frame 2 to form a spherical net, which is rotated to facilitate the small fry to swim out and prevent the large fry from eating the small fry. In addition, the function of sorting seedlings is achieved, and the small fry swimming out are collected in the net cage 28.

[0047] S2, artificial feeding combined with a complex feeder is used to feed artificial feed into the culture frame 2. When the complex feeder is used, the motor in the base 20 is started to drive the magnetic rod in the base 20 and the horn tube A19, which drives the water in the horn tube A19 to rotate. The rotating water is lifted by the spiral blade 25 in the pump pipe 18, so that the water at the bottom of the material collecting hopper 22 is continuously sprayed out of the horn mouth 15. When feeding, the artificial feeding method is used to feed the feed above the complex feeder. When the feed falls, part of the feed is eaten by the fry, and the part not eaten is collected and lifted by the material collecting hopper 22, and then sprayed out of the horn mouth 15, and the cycle is repeated until the feed is eaten by the fry. When feeding, the lamp tube 24 is turned on, so that the feed particles reflect light and are easily eaten by the fry.

[0048] S3, after the feeding is completed, the motor A7 is started to start the rotating shaft 5, the culture frame 2 is moved upwards to make the upper frame higher than the water surface, so that the density of the fry is increased, the activity of the fry is increased under the condition of high density, which is convenient for digestion, and the space between the fry is limited, so the mutual attack behavior is reduced. In addition, the culture frame 2 is manually pulled up by the pull ring 4 to adjust the density of the fry in each culture frame 2.

[0049] S4, after the Micropterus salmoides fry is successfully domesticated by the steps S1-S3, the net cage 28 is used to collect the fry. The main rein 33 of the net cage 28 is passed through the small hole of the auxiliary rein, and then the net cage 28 is fixed on the net cage frame 27 by winding around the frame waist 30 for one turn, and then the waist shaft 31 is clamped into the waist shaft slot 32, which is convenient for the net cage 28 to rotate in the cement pool 26. During cultivation, generally only the net cage 28 is sleeved on the net cage frame 27 under the water surface, and after a period of cultivation, the water permeability of the net cage 28 is poor, then the net cage 28 is sleeved on the net cage frame 27 on the water surface, and the net cage frame 27 is rotated to make the clean net cage 28 rotate to the water surface, and the fry will enter the new net cage 28 with the water, and the old net cage 28 is removed. After the cycle operation, the required fish size is cultivated.

[0050] Example 3

[0051] The difference from Example 2 is that the fry after S4 cultivation is returned to the rearing frame 2, and the small-sized fry is screened out by rotating the rearing frame 2 to make the small-sized fry swim out of the fish screen. The large-sized fry is used for the subsequent production and culture of large-mouth bass.

Claims

1. A device for selecting and breeding of large-mouth bass fry, characterized in that, The device comprises a feed acclimation feeding unit and a seedling cultivation unit; wherein the feed acclimation feeding unit comprises at least one round pool (1), the round pool (1) is provided with a breeding frame (2) and a re-feeding device, the breeding frame (2) is a spherical combined frame and is externally connected with a lifting device, part of the structure of the re-feeding device is embedded in the breeding frame (2), and the bottom of the round pool (1) is provided with a sewage discharge pipe (14); the seedling cultivation unit comprises a cement pool (26), a net cage frame (27) and a net cage (28), the net cage frame (27) is a two-semi-cylinder combined structure, the center of the bottom surface of the frame is rotationally connected with the pool ridge of the cement pool (26), and the net cage (28) is sleeved on the semi-cylinder. The breeding frame (2) comprises a fish screen, an upper frame and a lower frame from top to bottom, and fixed ring plates (9) are arranged at the contact edges between the three, fixed holes (10) are uniformly arranged on the ring plates, and the ring plates are connected through fixed bolts; the mesh of the fish screen is larger than that of the upper frame and the lower frame. The re-feeding device comprises a base (20), a material collecting funnel (22), a horn pipe A (19), a pump pipe (18), a horn pipe B (17), an elongated pipe (16) and a horn mouth (15) from bottom to top, wherein the upper part of the material collecting funnel (22) is embedded in the breeding frame (2); the base (20) and the horn pipe A (19) are supported and connected by at least two small columns to form a water inlet gap (21); the lower edge of the material collecting funnel (22) is fitted with the upper edge of the base (20); the horn pipe B (17) and the elongated pipe (16) are provided with a ring plate (23), and the ring plate (23) is provided with a lamp tube (24).

2. The apparatus for breeding of Micropterus salmoides fingerlings according to claim 1, characterized in that, The fixed ring plates (9) between the upper frame and the lower frame are provided with joint shafts (8) for connecting the lifting device; the lifting device comprises two fixed stakes (6), a rotating shaft (5) is arranged between the fixed stakes (6), pull rings (4) are uniformly arranged on the rotating shaft (5), a carrying pole (3) is connected to the pull rings (4) for connecting with the joint shafts (8), and the lifting device controls the rotation of the rotating shaft (5) through a motor A (7).

3. The largemouth bass fry breeding device according to claim 2, characterized in that, The fixed bolt comprises a head (11), a spring plate (12) and a tail (13), wherein the spring plate (12) is clamped in the fixed hole (10).

4. The largemouth bass fry breeding device according to claim 3, characterized in that, The pump pipe (18) is provided with helical blades (25) and the base (20) is provided with a motor, and a magnetic rod is arranged in the base (20) and the horn pipe A (19) in a penetrating mode and is driven by the motor.

5. The largemouth bass fry breeding device according to claim 4, characterized in that, The pool ridge of the cement pool (26) is uniformly provided with a waist shaft groove (32); the net cage frame (27) comprises two semi-cylinder structures formed by frame rods (29) and a frame waist (30) recessed inward between the two, the waist shaft (31) is arranged at the center of the frame waist (30) on the bottom surface, and the waist shaft (31) is rotationally connected with the waist shaft groove (32).

6. The largemouth bass fry breeding device according to claim 5, characterized in that, The net cage (28) comprises a main rein (33) and a vice rein, wherein the vice rein is interpenetrated to form a semi-cylindrical net structure, and small holes are left at the edges of the vice rein for the main rein (33) to pass through; the main rein (33) surrounds the frame waist (30) for one round to fix the net cage (28) on the net cage frame (27).

7. The device of claim 6 is applied in artificial feed acclimation cultivation and seedling screening of largemouth bass.

8. Use according to claim 7, characterized in that, The application comprises the following steps: S1, the large mouth bass fry is released in each culture frame (2), the culture frame (2) is only made of upper frame and lower frame in early domestication, the culture frame (2) is installed fish screen in late domestication, forms spherical surface net, rotates to facilitate small fry to swim out, prevents large fry from eating small fry, and plays the role of sorting fry, and the small fry that swims out is collected with net cage (28); S2, artificial feeding and complex feeder are combined to feed artificial feed in culture frame (2), when complex feeder is used, the motor in base (20) is started, the magnetic rod in base (20) and loudspeaker tube A (19) is driven, the water body in loudspeaker tube A (19) is rotated, the water body that rotates is lifted by the spiral blade (25) in pump pipe (18), the water body at the bottom of material collecting hopper (22) is continuously sprayed from horn mouth (15); when feeding, the artificial feeding mode is used to feed the feed above the complex feeder, part of the feed is eaten by the fry when falling, the part that is not eaten is collected and lifted by material collecting hopper (22), and then sprayed from horn mouth (15), and the cycle is repeated until the feed is eaten by the fry; when feeding, the lamp tube (24) is started, so that the feed particles reflect light and are easy to be eaten by the fry; S3, after feeding, motor A (7) is started to start rotating shaft (5), culture frame (2) moves up to make upper frame higher than water surface, so that the density of fry is increased, the activity of fry is increased under high-density conditions to facilitate digestion, and the space between the fry is limited to reduce the mutual attack behavior; in addition, the culture frame (2) is manually pulled up through the pull ring (4) to adjust the density of fry in each culture frame (2); S4, after the artificial feed of large mouth bass fry is successfully domesticated through S1-S3 steps, the fry is collected with net cage (28), the main rein (33) of net cage (28) is passed through the small hole of auxiliary rein, and then the net cage (28) is fixed on net cage frame (27) after winding around frame waist (30) for one turn, then waist shaft (31) is clamped into waist shaft slot (32), so that the net cage (28) can rotate in cement pool (26); during cultivation, generally only net cage (28) is sleeved on net cage frame (27) under water surface, after a period of cultivation, the water permeability of net cage (28) is poor, then net cage (28) is sleeved on net cage frame (27) on water surface, the clean net cage (28) is rotated to the water surface, the fry enters the new net cage (28) with water, and the old net cage (28) is removed; after the cycle operation, the required fish size is cultivated.

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