Weever cage culture method

Abstract

The invention relates to the field of weever culture, and provides a weever cage culture method, which comprises a support and a fish culture pond provided with a first fish culture chamber, a second fish culture chamber and a third fish culture chamber, the bottom of the pond is an inclined part inclined along the third fish culture chamber, ports are arranged among the chambers, the third fish culture chamber comprises a fishing net and a fishing device, each chamber is provided with a constant temperature, oxygen and water adding system and a drain valve, and the top of the pond is provided with a sun shield. Breeding is divided into three stages, wherein the temperature is accurately controlled to be 18-20 DEG C in the egg hatching and fry rearing stage, egg yolk emulsified feed is fed, and medicated bath is conducted in stages; respectively culturing in three fish culture chambers, gradually raising the temperature to 28-30 DEG C in the adult fish growth period, and feeding crushed feed; gradually reducing the temperature to 15-25 DEG C in the spawning period of adult fishes, regulating and controlling illumination, and feeding immunity enhancing feed containing beta-glucan and vitamin C; sequentially fishing and collecting roes after spawning, cleaning each chamber, and circularly culturing. The water quality is detected every month, ammonia nitrogen and nitrite are guaranteed to reach the standard, efficient and healthy breeding is achieved, and the technical problem that the perch breeding effect is poor is solved.

Description

Technical Field

[0001] This invention relates to the field of sea bass farming, and more particularly to a method for sea bass cage farming. Background Technology

[0002] Sea bass, a high-quality aquaculture species known for its tender flesh and rich nutrition, is experiencing a continuous rise in market demand, driving the rapid development of its large-scale aquaculture industry. Currently, sea bass farming mainly employs pond culture and cage culture methods. Among these, cage culture is widely used due to its advantages such as high space utilization and convenient management. However, existing technologies still face many problems that urgently need to be addressed. First, the precision of aquaculture environment control is insufficient. Different growth stages of sea bass (egg hatching, fry rearing, adult growth, and adult spawning) have significantly different requirements for environmental parameters such as water temperature, dissolved oxygen, and light. Traditional cage aquaculture often uses a uniform rearing area and extensive environmental management, making it difficult to precisely match the specific environmental conditions for each stage. This results in low egg hatching rates, low fry survival rates, slow adult growth, and low spawning. For example, a stable low-temperature environment is required during egg hatching, while higher water temperatures are needed to promote metabolism during adult growth. Traditional aquaculture methods cannot flexibly switch water temperature ranges, and water temperature fluctuations can easily trigger stress responses in sea bass, increasing the risk of disease.

[0003] Secondly, the functional division of aquaculture areas is vague, lacking efficient tiered aquaculture design. Existing cage aquaculture mostly uses single-species spaces, requiring mixed rearing of bass at different growth stages or frequent manual transfers. This is not only cumbersome and prone to injuring the fish, but also leads to the accumulation of pollution in the aquaculture water, causing cross-infection. Simultaneously, traditional aquaculture facilities lack targeted designs for egg collection and cleaning of the aquaculture area. Mixed rearing of eggs with adult fish makes them susceptible to ingestion, and untimely discharge of aquaculture wastewater can breed bacteria and parasites, further impacting aquaculture efficiency.

[0004] Furthermore, the disease prevention and control system is inadequate. During bass farming, diseases such as saprolegniasis, bacterial gill rot, and protozoan parasitic diseases occur frequently. Traditional control methods often rely on single-drug administration throughout the entire feeding cycle or medicated baths, lacking phased and targeted control plans. This not only results in poor control effects but also easily leads to drug residues and damage to the aquatic ecosystem. Additionally, oxygen deficiency is a significant problem during medicated baths in high-temperature periods, further increasing the risk of bass mortality. Moreover, the application of immune enhancement measures is insufficient; bass have weak immunity and are unable to resist environmental changes and pathogen invasion.

[0005] Finally, there is a lack of scientific standards for water exchange and water quality management. Traditional aquaculture relies heavily on experience to determine the frequency and volume of water exchanges, without developing targeted plans based on the different growth stages of the bass. This easily leads to problems such as excessive levels of ammonia nitrogen and nitrite in the water. At the same time, the fish experience significant stress during water exchanges, and the collection of fish eggs is disconnected from the cleaning of the aquaculture area, making it impossible to achieve a closed-loop cycle of the aquaculture cycle and resulting in low resource utilization.

[0006] In summary, existing methods of sea bass cage culture have significant shortcomings in terms of environmental control, regional division, disease prevention and control, and water quality management, which restrict the improvement of aquaculture efficiency and the sustainable development of the industry. Summary of the Invention

[0007] Therefore, to address the aforementioned problems, this invention proposes a method for sea bass cage culture. This method solves the technical problem of poor sea bass culture results.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: A method for cage culture of bass includes a support frame and a fish pond. The fish pond has a first, second, and third fish pond with upward-facing openings. The bottom of the fish pond is inclined, and the inclined section slopes downwards along the direction of the third fish pond. There are openings between the first and second fish ponds, and between the second and third fish ponds. A fishing net is placed in the third fish pond. A retrieval device is provided on the support frame. The fishing net is connected to the retrieval device, which can move the fishing net upwards to retrieve the fish in the third fish pond. There is a gap between the bottom of the fishing net and the bottom of the third fish pond. The first, second, and third fish ponds are respectively equipped with a constant temperature system, an oxygen system, a water supply system, and a drain valve. A sunshade is provided on the top of the fish pond. The sunshade is connected to a first drive device, which can open and close the sunshade.

[0009] Including the following methods: (1) Egg hatching period and fry rearing period: Place the fish eggs in the first fish rearing room. The water temperature in the first fish rearing room is precisely controlled at 18-20℃ with a daily fluctuation of ≤0.5℃. The oxygen system uses microporous aeration discs with a pore size of 0.6-1.8mm and an air distribution of 1.0-1.4m³ / h to maintain dissolved oxygen ≥7mg / L. Feed the fish with egg yolk emulsion feed with a particle size of ≤0.1mm. The daily feed amount is 2%-5% of the weight of the eggs or fry, and the feed weight is increased by 1%-3% every week. (2) Adult growth period: According to the growth of the sea bass, open the opening between the first and second fish rearing rooms, and send the sea bass and water from the first fish rearing room into the second fish rearing room. Add water to the second fish rearing room using the water supply system. Increase the water temperature by 0.5-1℃ per week. After the water temperature reaches 28-30℃, keep it constant. Feed crushed feed with a particle size of 0.5-1.0mm. Increase the feed weight by 2.5%-3.5% per week.

[0010] (3) Spawning period of adult fish: According to the growth of the sea bass, open the opening between the second and third fish rearing rooms, and send the sea bass and water from the second fish rearing room into the third fish rearing room. Add water to the third fish rearing room through the water supply system. The water temperature is reduced by 0.5-1℃ every week. After the water temperature drops to 15-25℃, it is kept constant. The light time is increased by 1 hour every week until the light time is maintained after 13-15 hours. Feed extruded feed and immune-enhancing feed. The feed weight is increased by 1%-3% every week until 1-1.5 months later, and then the feed amount is maintained.

[0011] (4) Water change and cleaning: After the bass in the third fish tank spawn, the fish eggs will fall to the bottom through the fishing net. The retrieval device will move the fishing net upward to retrieve the fish in the third fish tank, drain the water in the third fish tank and collect the fish eggs, and clean the third fish tank. After the third fish tank is cleaned, open the opening between the second and third fish tanks. The bass and water in the second fish tank will flow into the third fish tank due to the height difference, and the second fish tank will be cleaned. After the second fish tank is cleaned, open the opening between the first and second fish tanks. The bass and water in the first fish tank will flow into the second fish tank due to the height difference, and the first fish tank will be cleaned. After the first fish tank is cleaned, add water and put the collected fish eggs into the first fish tank.

[0012] Further: Medicated bath methods during incubation and fry rearing periods: a1. Starting from the third water change, add 6%-10% saline solution and soak for 5-15 minutes. After soaking, kill bacteria and water mold spores on the surface and replace 1 / 2-2 / 3 of the total water. a2. Before the fifth water change, mix potassium permanganate solution at a ratio of 10-20g dissolved in 100L of water, and prepare a potassium permanganate solution of 10-20mg / L in the dark. Prepare the solution immediately and pour it into the first fish room to kill parasites such as Cryptosporidium gillii and Chilodonella. Replace 1 / 2 to 2 / 3 of the total water volume. a3. Before the seventh water change, soak the fish in a solution of copper sulfate and ferrous sulfate for 10-30 minutes at a concentration of 1.0-1.2 g / m³, then pour it into the first fish tank to prevent protozoan diseases and replace 1 / 2-2 / 3 of the total water volume. a4. Before the ninth water change, take bleaching powder and pour it into the first fish room for 15-30 minutes to prevent bacterial gill rot. Replace 1 / 2 to 2 / 3 of the total water volume. During the hot summer months, it is necessary to increase oxygen levels to avoid oxygen deficiency caused by medicated baths.

[0013] Methods for medicated bathing adult fish during their growth period: b1. Before the first water change in the second fish tank, soak the fish in a mixture of 0.3 mg / L trichlorfon and 5:2 copper sulfate and ferrous sulfate for 5-15 minutes, and then replace 1 / 2 to 2 / 3 of the total water. b2. Before the fifth water change in the second fish tank, administer a therapeutic medicated bath once a day for 3-5 consecutive days, combined with a 7-day course of antibiotics. Use formalin (30-50ml / m³) or povidone-iodine (0.5g / L) to soak for 20-30 minutes, and replace 1 / 2-2 / 3 of the total water volume. b3. Before the eighth water change in the second fish tank, mix bile acids with Happiness 100 in the feed, reduce the feeding of high-fat feed, and use medicated baths to enhance immunity. During the hot summer months, it is necessary to increase oxygen levels to avoid oxygen deficiency caused by medicated baths.

[0014] Methods for medicated bathing adult fish during spawning period: c1. One week before breeding, administer a preventative medicated bath once a week, using povidone-iodine (0.5g / L) for 20 minutes. After rinsing, replace 1 / 2 to 2 / 3 of the total water volume. c2. If symptoms appear during the breeding season, soak the water in a mixture of copper sulfate and ferrous sulfate in a 5:2 ratio or in a decoction of Sophora flavescens for 10-30 minutes. After cleaning, replace 1 / 2 to 2 / 3 of the total water. c3. In cases of severe water mold disease, use salicylic acid + povidone-iodine solution for soaking, and add Sanhuang powder and florfenicol for oral administration to prevent nocardiosis. After a medicated bath, replenish nutrients promptly to enhance physical fitness. Strict water quality management is required, with dissolved oxygen ≥5mg / L and pH 7.0-8.5.

[0015] The inclined portion includes a first inclined surface provided in the first fish rearing room, on which multiple long grooves are provided for fish eggs to hatch; the inclined portion includes a second inclined surface provided in the second fish rearing room, on which the second inclined surface has a wave-shaped structure; the inclined portion includes a third inclined surface provided in the third fish rearing room, on which multiple arc-shaped grooves are provided.

[0016] The inclination angle of the inclined surface is 10 to 30 degrees, the length of the second fish pond is 3 to 6 times the length of the first fish pond, and the length of the third fish pond is 2 to 5 times the length of the second fish pond.

[0017] Water quality is tested monthly, with ammonia nitrogen ≤0.3mg / L and nitrite ≤0.05mg / L.

[0018] The immune-enhancing feed is supplemented with 2g / kg of β-glucan and 1g / kg of vitamin C.

[0019] The third fish-raising room is connected to a water circulation device to increase water flow and stimulate fish to spawn.

[0020] Water change method: (1) Egg hatching period and fry rearing period: The first water change should be started on the 5th to 10th day after all the fry hatch, and the water should be changed every three days. The water volume of the first three water changes should be 20%-30% of the total water volume. After the third time, water should be added every 5-7 days and the water should be changed every 15-20 days. The water volume of each water change should be about 30%. When medicated bath is required, the water volume of the water change should be 50%-67%. (2) Adult fish growth period: Change the water once every 12-18 days, with a water change volume of 50%-67%; add water once every 5-7 days, and combine with oxygenation measures, with dissolved oxygen > 5mg / L. During the high temperature period, the aerator should be turned on for more than 10 hours a day. (3) Adult fish spawning period: Change the water once every 15-20 days, with a water change volume of 30%-50%. When encountering medicated bath, the water change volume is 50%-67%.

[0021] By adopting the aforementioned technical solution, the beneficial effects of the present invention are: This invention divides the fish pond into three rearing chambers, corresponding to the egg hatching period, fry rearing period, adult growth period, and adult spawning period, respectively. A constant temperature system enables precise temperature control at each stage (e.g., 18-20℃ for egg hatching, 28-30℃ for adult growth, and 15-25℃ for adult spawning), with temperature fluctuations controlled to ≤0.5℃, effectively preventing stress in the bass. Combined with targeted feeding programs (e.g., emulsified egg yolk feed for fry, and crushed and extruded feed for adults) and light regulation (gradually increasing light to 13-15 hours during adult spawning), it significantly improves egg hatching rate (more than 30% higher than traditional methods), fry survival rate (25%-35% higher), promotes rapid adult growth, shortens the rearing cycle by 15%-20%, and increases adult spawning by approximately 40%.

[0022] The fish ponds are designed with a sloping bottom (10°-30°) and openings between each rearing chamber. This height difference allows for the natural transfer of bass between chambers, eliminating the need for manual handling and reducing fish injury and stress. A net and retrieval device are installed in the third rearing chamber, allowing fish eggs to fall through the net to the sloping bottom for easy collection and preventing adult fish from eating them. The retrieval device also quickly separates adult fish from eggs, improving operational efficiency. The long groove structure on the first sloping surface provides a stable incubation environment for the eggs, while the wave-shaped structure on the second sloping surface increases the activity space and water contact area for adult fish. The curved groove on the third sloping surface facilitates egg deposition and collection, further optimizing rearing conditions at each stage. Furthermore, alternating cleaning of the rearing chambers and water recycling achieve a closed-loop operation of the rearing cycle, increasing water resource utilization by 40%-50%.

[0023] This invention develops customized medicated bath programs targeting high-incidence diseases at different growth stages: During egg hatching and fry rearing, a phased medicated bath using saline solution, potassium permanganate, a mixture of copper sulfate and ferrous sulfate, and bleaching powder is employed to specifically kill bacteria, water mold spores, and parasites on the fish's body surface, preventing protozoan diseases and bacterial gill rot; during the adult growth period, a mixture of trichlorfon, copper sulfate, and ferrous sulfate, along with formalin, is used to address both parasitic and bacterial diseases; during the spawning period, a preventative medicated bath using povidone-iodine is the primary method, supplemented with traditional Chinese medicine preparations such as Sophora flavescens decoction and Sanhuang powder, reducing the use of chemical drugs and lowering the risk of drug residues. Simultaneously, the oxygenation requirements and water exchange volume (50%-67%) during the medicated baths are clearly defined to avoid oxygen deficiency stress, resulting in a disease incidence rate reduced by more than 60% compared to traditional methods and an increase in survival rate to over 90%.

[0024] This invention establishes a phased water exchange scheme, combined with monthly water quality testing (ammonia nitrogen ≤ 0.3 mg / L, nitrite ≤ 0.05 mg / L), to ensure a stable aquatic environment for aquaculture. During the egg hatching and fry rearing periods, phased water exchanges begin 5-10 days after hatching, balancing water quality renewal with fry adaptation. During the adult growth period, the frequency and volume of water exchanges are increased, and the aerator operating time is extended during high-temperature periods to ensure dissolved oxygen > 5 mg / L. During the spawning period, the volume of water exchanges is controlled to avoid stress, while a water circulation device increases water flow to stimulate spawning. Scientific water quality management not only reduces disease outbreaks but also promotes digestion and absorption in bass, increasing growth rate, while reducing environmental pollution from aquaculture wastewater discharge, aligning with green aquaculture principles.

[0025] Feeding adult sea bass with immune-enhancing feed during their spawning period, combined with bile acids and Happiness 100, significantly improves their immunity and stress resistance, reducing mortality caused by environmental changes or diseases during the breeding process. Dynamic adjustments to feed particle size and feeding amount at each stage (e.g., 2%-5% daily feeding amount during the fry stage, increasing by 1%-3% weekly) ensure precise matching of nutrient supply with growth needs, avoiding feed waste and water pollution, while also improving the tenderness and nutrient content of sea bass meat, significantly enhancing the product's market competitiveness. Attached Figure Description

[0026] Figure 1 This is a simplified structural diagram of the present invention.

[0027] Figure 2 This is a simplified structural diagram of a fishpond.

[0028] Figure 3 This is a simplified structural diagram of the bracket and sunshade.

[0029] Figure 4 yes Figure 3 A simplified structural diagram of another state of the sun visor.

[0030] Figure 5 This is a simplified structural diagram of the salvage device.

[0031] Figure 6 This is a simplified structural diagram of the second slide rail.

[0032] Figure 7 This is a simplified structural diagram of the third fish farming room.

[0033] Figure label: 1. Support frame; 10. First slide rail; 2. Fish pond; 21. First fish rearing room; 22. Second fish rearing room; 23. Third fish rearing room; 24. Inclined section; 241. First inclined surface; 242. Second inclined surface; 243. Third inclined surface; 244. Long groove; 245. Arc-shaped groove; 25. Through opening; 26. Fishing net; 3. Salvage device; 31. Second slide rail; 32. Electric hoist; 33. First position; 4. Water supply system; 5. First drive device; 51. First slider; 52. Bidirectional screw; 53. First drive motor; 6. Sunshade. Detailed Implementation

[0034] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0035] refer to Figures 1 to 7 This embodiment provides a method for cage culture of sea bass, including a support frame 1 and a fish pond 2. The fish pond 2 has a first fish pond 21, a second fish pond 22, and a third fish pond 23 with upward-opening sections. The bottom of the fish pond 2 is an inclined section 24, which slopes downward along the direction of the third fish pond 23. There are openings 25 between the first fish pond 21 and the second fish pond 22, and between the second fish pond 22 and the third fish pond 23. A fishing net 26 is installed inside the third fish pond 23. The support frame 1 is equipped with... There is a retrieval device 3, and the fishing net 26 is connected to the retrieval device 3. The retrieval device 3 can move the fishing net 26 upward to retrieve the fish in the third fish pond 2. There is a gap between the bottom of the fishing net 26 and the bottom of the third fish pond 23. The first fish pond 21, the second fish pond 22 and the third fish pond 23 are respectively equipped with a constant temperature system, an oxygen system, a water supply system 4 and a drain valve. The top of the fish pond 2 is equipped with a sunshade 6, and the sunshade 6 is connected to a first drive device 5. The first drive device 5 can open and close the sunshade 6.

[0036] The main methods include the following: (1) Egg hatching period and fry rearing period: Place the fish eggs in the first fish rearing room 21. The water temperature in the first fish rearing room 21 is precisely controlled at 18-20℃ with a daily fluctuation of ≤0.5℃. The oxygen system uses microporous aeration discs with a pore size of 0.6-1.8mm and an air distribution of 1.0-1.4m³ / h to maintain dissolved oxygen ≥7mg / L. Feed the fish with egg yolk emulsion feed with a particle size of ≤0.1mm. The daily feed amount is 2%-5% of the weight of the eggs or fry, and the feed weight is increased by 1%-3% every week. (2) Adult growth period: According to the growth of the sea bass, open the opening 25 of the first fish room 21 and the second fish room 22, and send the sea bass and water from the first fish room 21 into the second fish room 22. Add water to the second fish room 22 through the water supply system 4. Increase the water temperature by 0.5-1℃ per week. After the water temperature reaches 28-30℃, keep it constant. Feed crushed feed with a particle size of 0.5-1.0mm. Increase the feed weight by 2.5%-3.5% per week.

[0037] (3) Spawning period of adult fish: According to the growth of the sea bass, open the opening 25 of the second fish room 22 and the third fish room 23, and send the sea bass and water from the second fish room 22 into the third fish room 23. Add water to the third fish room 23 through the water supply system 4. The water temperature is lowered by 0.5-1℃ every week. After the water temperature drops to 15-25℃, it is kept constant. The light time is increased by 1 hour every week until the light time is maintained after 13-15 hours. Feed extruded feed and immune-enhancing feed. The feed weight is increased by 1%-3% every week until 1-1.5 months later, the feed amount is maintained.

[0038] (4) Water change and cleaning: After the bass in the third fish tank 23 spawn, the fish eggs will fall to the bottom through the fishing net 26. The retrieval device 3 moves the fishing net 26 upward to retrieve the fish in the third fish tank 2, drain the water in the third fish tank 23 and collect the fish eggs, and clean the third fish tank 23. After the third fish tank 23 is cleaned, the opening 25 between the second fish tank 22 and the third fish tank 23 is opened. The bass and water in the second fish tank 22 flow into the third fish tank 23 due to the height difference, and the second fish tank 22 is cleaned. After the second fish tank 22 is cleaned, the opening 25 between the first fish tank 21 and the second fish tank 22 is opened. The bass and water in the first fish tank 21 flow into the second fish tank 22 due to the height difference, and the first fish tank 21 is cleaned. After the first fish tank 21 is cleaned, water is added and the collected fish eggs are put into the first fish tank 21.

[0039] When the bass and water from the second fish tank 22 flow into the third fish tank 23, the fishing net 26 near the opening 25 is lowered to the lower end of the opening 25. After the bass and water from the second fish tank 2 have completely drained into the second fish tank 2, the fishing net 26 is then raised. At the same time, hooks are installed on the top of the third fish tank 2 to hang the fishing net 26.

[0040] Medicated bath methods during incubation and fry rearing periods: a1. Starting from the third water change, add 6%-10% saline solution and soak for 5-15 minutes. After soaking, kill bacteria and water mold spores on the surface and replace 1 / 2-2 / 3 of the total water. a2. Before the fifth water change, mix potassium permanganate solution at a ratio of 10-20g dissolved in 100L of water, and prepare a potassium permanganate solution of 10-20mg / L in the dark. Prepare the solution immediately and pour it into the first fish room 21 to kill parasites such as gill caterpillars and chilodonella. Replace 1 / 2 to 2 / 3 of the total water volume. a3. Before the seventh water change, soak the fish in a solution of copper sulfate and ferrous sulfate for 10-30 minutes at a concentration of 1.0-1.2 g / m³, then pour it into the first fish tank 21 to prevent protozoan diseases and replace 1 / 2-2 / 3 of the total water volume. a4. Before the ninth water change, take bleaching powder and pour it into the first fish room for 15-30 minutes to prevent bacterial gill rot. Replace 1 / 2 to 2 / 3 of the total water volume. During the hot summer months, it is necessary to increase oxygen levels to avoid oxygen deficiency caused by medicated baths.

[0041] Methods for medicated bathing adult fish during their growth period: b1. Before the first water change in the second fish tank 22, soak the tank for 5-15 minutes with a mixture of 0.3 mg / L trichlorfon and 5:2 copper sulfate and ferrous sulfate, and then replace 1 / 2 to 2 / 3 of the total water. b2. Before the fifth water change in the second fish tank 22, administer a therapeutic medicated bath once a day for 3-5 consecutive days, combined with an antibiotic course of 7 days. Use formalin (30-50ml / m³) or povidone-iodine (0.5g / L) to soak for 20-30 minutes, and replace 1 / 2-2 / 3 of the total water volume. b3. Before the eighth water change in the second fish tank 22, mix bile acids and Happiness 100 into the feed, reduce the feeding of high-fat feed, and use medicated bath to enhance immunity. During the hot summer months, it is necessary to increase oxygen levels to avoid oxygen deficiency caused by medicated baths.

[0042] Methods for medicated bathing adult fish during spawning period: c1. One week before breeding, administer a preventative medicated bath once a week, using povidone-iodine (0.5g / L) for 20 minutes. After rinsing, replace 1 / 2 to 2 / 3 of the total water volume. c2. If symptoms appear during the breeding season, soak the water in a mixture of copper sulfate and ferrous sulfate in a 5:2 ratio or in a decoction of Sophora flavescens for 10-30 minutes. After cleaning, replace 1 / 2 to 2 / 3 of the total water. c3. In cases of severe water mold disease, use salicylic acid + povidone-iodine solution for soaking, and add Sanhuang powder and florfenicol for oral administration to prevent nocardiosis. In one embodiment, nutrients are replenished promptly after the medicated bath to enhance physical fitness. Strict water quality management is required, with dissolved oxygen ≥5mg / L and pH 7.0-8.5.

[0043] In one embodiment, the inclined portion 24 includes a first inclined surface 241 disposed in the first fish rearing chamber 21, the first inclined surface 241 having a plurality of elongated grooves 244, in which fish eggs can be incubated; the inclined portion 24 includes a second inclined surface 242 disposed in the second fish rearing chamber 22, the second inclined surface 242 having a wave-shaped structure; the inclined portion 24 includes a third inclined surface 243 disposed in the third fish rearing chamber 23, the third inclined surface 243 having a plurality of arc-shaped grooves 245.

[0044] In one embodiment, the inclination angle of the inclined surface is 10 to 30 degrees, the length of the second fish pond 2 is 3 to 6 times the length of the first fish pond 2, and the length of the third fish pond 2 is 2 to 5 times the length of the second fish pond 2.

[0045] In one embodiment, water quality is tested monthly, with ammonia nitrogen ≤0.3 mg / L and nitrite ≤0.05 mg / L.

[0046] In one embodiment, the immune-enhancing feed was supplemented with 2 g / kg of β-glucan and 1 g / kg of vitamin C.

[0047] In one embodiment, the third fish-rearing chamber 23 is connected to a water circulation device to increase water flow and stimulate fish to spawn.

[0048] In one embodiment, a water replacement method is also included: (1) Egg hatching period and fry rearing period: The first water change should be started on the 5th to 10th day after all the fry hatch, and the water should be changed every three days. The water volume of the first three water changes should be 20%-30% of the total water volume. After the third time, water should be added every 5-7 days and the water should be changed every 15-20 days. The water volume of each water change should be about 30%. When medicated bath is required, the water volume of the water change should be 50%-67%. (2) Adult fish growth period: Change the water once every 12-18 days, with a water change volume of 50%-67%; add water once every 5-7 days, and combine with oxygenation measures, with dissolved oxygen > 5mg / L. During the high temperature period, the aerator should be turned on for more than 10 hours a day. (3) Adult fish spawning period: Change the water once every 15-20 days, with a water change volume of 30%-50%. When encountering medicated bath, the water change volume is 50%-67%.

[0049] The constant temperature system is equipped with an independent variable frequency electric heater and chiller for each fish tank to achieve precise water temperature control; the oxygen system is equipped with microporous aeration discs for each fish tank. The first fish tank 21 uses 4 aeration discs with a pore size of 0.6-1.8mm, while the second fish tank 22 and the third fish tank each use 8 aeration discs with a pore size of 1.5mm. They are equipped with Roots blowers, and the air distribution volume can be steplessly adjusted in the range of 1.0-1.4m³ / h.

[0050] Among them, the water supply system 4 uses deep groundwater as its water source. After being filtered by quartz sand and disinfected by ultraviolet light, the water is connected to each fish farming room through branch pipelines.

[0051] Among them, the water circulation device is a 1.1kW submersible propeller pump (water circulation device) installed in the third fish room 23, with a flow rate of 3m³ / h, which is used to increase water flow to stimulate bass to spawn.

[0052] It is equipped with rapid detectors for ammonia nitrogen and nitrite to meet monthly water quality testing needs.

[0053] The aforementioned constant temperature system, oxygen system, water supply system 4, and drain valve are known devices and are not shown in the figure, so they will not be described in detail here.

[0054] In one embodiment, the port 25 is sealed by a baffle or valve, the baffle being drivable by a second drive device.

[0055] In one embodiment, the first driving device 5 includes a first slide rail 10 mounted on the bracket 1 and located at the top of the fish pond 2, two first sliders 51 slidable on the first slide rail 10, a bidirectional screw 52 threadedly connected to the two first sliders 51, a first driving motor 53 driving the bidirectional screw 52 to rotate, and two sunshades 6. The sunshades 6 have a corrugated structure, with one end of the sunshade 6 fixedly connected to both ends of the bracket 1 and the other end fixed to the first sliders 51. When providing shade or protection from rain, the first driving motor 53 drives the bidirectional screw 52 to rotate, causing the two sunshades 6 to move relative to each other and unfold to the top of the fish pond 2.

[0056] In one embodiment, the width of the third fish-raising chamber 23 gradually decreases along the first position 33, and the horizontal cross-section of the third fish-raising chamber 23 can be a triangular or trapezoidal structure, which facilitates the setting of the fishing net 26 and the movement of the electric hoist 32.

[0057] In one embodiment, the fishing device 3 includes a second slide rail 31 and a plurality of electric hoists 32 that can slide on the second slide rail 31. The fishing net 26 is detachably connected to the electric hoists 32. The frame has a first position 33, and one end of the second slide rail 31 extends to the first position 33. When fishing for sea bass, the fishing net 26 is fixed on the electric hoist 32. The electric hoist 32 is raised to concentrate the fish in the fishing net 26. The electric hoist 32 moves along the first position 33 and is concentrated in the first position 33 to retrieve the fishing net 26.

[0058] When hauling in the net, each electric hoist 32 moves to the edge of the fishing net 26. The electric hoist 32 descends, hooking its hook onto the fishing net 26. The electric hoist 32 rises, raising the fishing net 26. The electric hoist 32 is manually pushed to the first position 33 to haul in the fishing net 26.

[0059] The electric hoist 32 described above can be controlled by a single remote control for lifting and lowering, which is a well-known technology and will not be described in detail here.

[0060] In one embodiment, the frame has a lighting system that can supplement lighting during cloudy or rainy weather.

[0061] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which shall be within the scope of protection of the invention.

Claims

1. A method of farming sea bass in a net cage, characterized by: The utility model provides a fish -breeding device, including support and fish pond, the fish pond has first fish -breeding chamber, second fish -breeding chamber and third fish -breeding chamber with opening upwards in turn, the fish pond bottom is inclined portion, the inclined portion inclines downward along the direction of third fish -breeding chamber, and the second fish -breeding chamber and third fish -breeding chamber have through -opening between first fish -breeding chamber and second fish -breeding chamber, the third fish -breeding chamber has fishing net in, the fishing net is connected fishing device, and the fishing device can move fishing net upward and fish in third fish -breeding pool is fished, and the gap exists between the third fish -breeding chamber bottom and fishing net bottom, and the first fish -breeding chamber, second fish -breeding chamber and third fish -breeding chamber have constant temperature system, oxygen system, water adding system and drain valve respectively, the fish pond top is equipped with sun -shading board, and the sun -shading board is connected first drive arrangement, and the first drive arrangement can open and close sun -shading board; The utility model provides a fish -breeding device, including support and fish pond, the fish pond has first fish -breeding chamber, second fish -breeding chamber and third fish -breeding chamber with opening upwards in turn, the fish pond bottom is inclined portion, the inclined portion inclines downward along the direction of third fish -breeding chamber, and the second fish -breeding chamber and third fish -breeding chamber have through -opening between first fish -breeding chamber and second fish -breeding chamber, the third fish -breeding chamber has fishing net in, the fishing net is connected fishing device, and the fishing device can move fishing net upward and fish in third fish -breeding pool is fished, and the gap exists between the third fish -breeding chamber bottom and fishing net bottom, and the first fish -breeding chamber, second fish -breeding chamber and third fish -breeding chamber have constant temperature system, oxygen system, water adding system and drain valve respectively, the fish pond top is equipped with sun -shading board, and the sun -shading board is connected first drive arrangement, and the first drive arrangement can open and close sun -shading board; (1) egg hatching period and fry cultivation period: the fish eggs are placed in the first fish -breeding chamber, the water temperature of the first fish -breeding chamber is accurately controlled at 18-20 DEG C, the daily fluctuation is less than or equal to 0.5 DEG C, the oxygen system adopts the microporous oxygenation disc, the aperture is 0.6-1.8 mm, the air distribution is 1.0-1.4 m³ / h, the dissolved oxygen is maintained to be greater than or equal to 7 mg / L, the egg yolk emulsified feed is fed, the particle size is less than or equal to 0.1 mm, the daily feeding amount of feed is 2%-5% of the weight of the eggs or fry, and the weight of the feed is increased by 1%-3% per week; (2) adult fish growth period: according to the growth of the perch, the through -openings of the first fish -breeding chamber and the second fish -breeding chamber are opened, the perch in the first fish -breeding chamber and water are sent into the second fish -breeding chamber, the water adding system adds water in the second fish -breeding chamber, the water temperature is increased by 0.5-1 DEG C per week, the water temperature is kept constant after being increased to 28-30 DEG C, the broken feed is fed, the particle size of the feed is 0.5-1.0 mm, and the weight of the feed is increased by 2.5%-3.5% per week; (3) adult fish spawning period: according to the growth of the perch, the through -openings of the second fish -breeding chamber and the third fish -breeding chamber are opened, the perch in the second fish -breeding chamber and water are sent into the third fish -breeding chamber, the water adding system adds water in the third fish -breeding chamber, the water temperature is decreased by 0.5-1 DEG C per week, the water temperature is kept constant after being decreased to 15-25 DEG C, the illumination time is increased by 1 hour per week, and the illumination time is kept constant after being increased to 13-15 hours; the puffed feed and the immune-enhancing feed are fed, the weight of the feed is increased by 1%-3% per week, and the feeding amount of the feed is kept constant after 1-1.5 months; (4) Water change and cleaning: After the bass in the third fish tank spawn, the fish eggs will fall to the bottom through the fishing net. The retrieval device will move the fishing net upward to retrieve the fish in the third fish tank, drain the water in the third fish tank and collect the fish eggs, and clean the third fish tank. After the third fish tank is cleaned, open the opening between the second and third fish tanks. The bass and water in the second fish tank will flow into the third fish tank due to the height difference, and the second fish tank will be cleaned. After the second fish tank is cleaned, open the opening between the first and second fish tanks. The bass and water in the first fish tank will flow into the second fish tank due to the height difference, and the first fish tank will be cleaned. After the first fish tank is cleaned, add water and put the collected fish eggs into the first fish tank.

2. A seabass net cage farming method according to claim 1, characterized in that: Medicated bath methods during incubation and fry rearing periods: a1. Starting from the third water change, add 6%-10% saline solution and soak for 5-15 minutes. After soaking, kill bacteria and water mold spores on the surface and replace 1 / 2-2 / 3 of the total water. a2. Before the fifth water change, mix potassium permanganate solution at a ratio of 10-20g dissolved in 100L of water, and prepare a potassium permanganate solution of 10-20mg / L in the dark. Prepare the solution immediately and pour it into the first fish room to kill parasites such as Cryptosporidium gillii and Chilodonella. Replace 1 / 2 to 2 / 3 of the total water volume. a3. Before the seventh water change, soak the fish in a solution of copper sulfate and ferrous sulfate for 10-30 minutes at a concentration of 1.0-1.2 g / m³, then pour it into the first fish tank to prevent protozoan diseases and replace 1 / 2-2 / 3 of the total water volume. a4. Before the ninth water change, take bleaching powder and pour it into the first fish room for 15-30 minutes to prevent bacterial gill rot. Replace 1 / 2 to 2 / 3 of the total water volume. During the hot summer months, it is necessary to increase oxygen levels to avoid oxygen deficiency caused by medicated baths.

3. A seabass net cage farming method according to claim 1, characterized in that: Methods for medicated bathing adult fish during their growth period: b1. Before the first water change in the second fish tank, soak the fish in a mixture of 0.3 mg / L trichlorfon and 5:2 copper sulfate and ferrous sulfate for 5-15 minutes, and then replace 1 / 2 to 2 / 3 of the total water. b2. Before the fifth water change in the second fish tank, administer a therapeutic medicated bath once a day for 3-5 consecutive days, combined with a 7-day course of antibiotics. Use formalin (30-50ml / m³) or povidone-iodine (0.5g / L) to soak for 20-30 minutes, and replace 1 / 2-2 / 3 of the total water volume. b3. Before the eighth water change in the second fish tank, mix bile acids with Happiness 100 in the feed, reduce the feeding of high-fat feed, and use medicated baths to enhance immunity. During the hot summer months, it is necessary to increase oxygen levels to avoid oxygen deficiency caused by medicated baths.

4. A seabass net pen culture method according to claim 1, characterized by: Methods for medicated bathing adult fish during spawning period: c1. One week before breeding, administer a preventative medicated bath once a week, using povidone-iodine (0.5g / L) for 20 minutes. After rinsing, replace 1 / 2 to 2 / 3 of the total water volume. c2. If symptoms appear during the breeding season, soak the water in a mixture of copper sulfate and ferrous sulfate in a 5:2 ratio or in a decoction of Sophora flavescens for 10-30 minutes. After cleaning, replace 1 / 2 to 2 / 3 of the total water. c3. When the fish is seriously infected with water mold, use salicylic acid + povidone iodine solution to soak and wash, and add Sanhuang Powder and florfenicol orally to prevent and treat Nocardiosis; After the bath, supplement nutrients in time to enhance the constitution, and strictly manage the water quality, with dissolved oxygen ≥ 5 mg / L and pH 7.0-8.

5.

5. A seabass net cage farming method according to claim 1, characterized in that: The inclined part comprises a first inclined surface arranged in the first fish breeding chamber, and a plurality of long grooves are arranged on the first inclined surface, and the fish eggs can be hatched in the long grooves; the inclined part comprises a second inclined surface arranged in the second fish breeding chamber, and the second inclined surface is in a wave shape structure; the inclined part comprises a third inclined surface arranged in the third fish breeding chamber, and the third inclined surface has a plurality of arc concave grooves.

6. A seabass net pen culture method according to claim 1, characterized by: The inclined angle of the inclined surface is 10-30 degrees, the length of the second fish breeding pool is 3-6 times the length of the first fish breeding pool, and the length of the third fish breeding pool is 2-5 times the length of the second fish breeding pool.

7. A seabass net cage farming method according to claim 1, characterized by: The water quality is detected every month, and the ammonia nitrogen is ≤0.3 mg / L and the nitrite is ≤0.05 mg / L.

8. A seabass net pen culture method according to claim 1, characterized by: The immune-enhancing feed is added with β-glucan 2 g / kg and vitamin C 1 g / kg.

9. A seabass net pen culture method according to claim 1, characterized by: The third fish breeding chamber is connected with a water flow circulating device to increase the water flow and stimulate the fish to spawn.

10. A seabass net pen culture method according to claim 1, characterized by: Water changing method: (1) Egg hatching period and fry cultivation period: the first water changing is started at 5-10 days after all the fry are hatched, and the water is changed every three days, and the water changing amount is 20%-30% of the total water body for the first three times; after the third time, water is added every 5-7 days, and water is changed every 15-20 days, and the water changing amount is about 30% every time, and when the bath is encountered, the water changing amount is 50%-67%; (2) Adult fish growth period: water is changed every 12-18 days, and the water changing amount is 50%-67%; water is added every 5-7 days, and the oxygenation measure is matched, and the dissolved oxygen is >5 mg / L, and the oxygenation machine is started for more than 10 hours every day in the high temperature period; (3) Adult fish spawning period: water is changed every 15-20 days, and the water changing amount is 30%-50%, and when the bath is encountered, the water changing amount is 50%-67%.

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