A method for segmented farming of golden pompano

Abstract

The present application belongs to the technical field of aquaculture, and particularly relates to a segmented type of pompano breeding method. The segmented type of breeding method provided by the present application supplies nutrition accurately according to the requirements of different growth stages of pompano, and significantly improves the growth speed. Through the optimization of water temperature and light conditions in different stages, the growth speed of pompano is significantly accelerated, thereby shortening the breeding cycle. The addition of licorice powder and melatonin in the feed further enhances the immunity of pompano and reduces the use of drugs. Through the segmented type of breeding, the present application improves the unit yield and survival rate of pompano, and significantly improves the economic benefits.

Description

Technical Field

[0001] This invention belongs to the field of aquaculture technology, specifically relating to a segmented farming method for golden pomfret. Background Technology

[0002] Golden pomfret is a warm-water, mid-to-upper-level migratory fish characterized by rapid growth, strong disease resistance, and tender flesh, making it an important economic fish species along the southern coast. The golden pomfret farming industry in China began in the 1980s, initially focusing on traditional pond farming on a small scale with relatively low technological levels. In the 1990s, with advancements in aquaculture technology, golden pomfret farming gradually shifted from single-pond farming to various forms such as cage farming and factory farming, leading to continuous expansion of the farming scale. Entering the 21st century, driven by policy support and market demand, the golden pomfret farming industry has gradually improved its industrial chain, forming a complete chain from seedling production, farming, processing to sales. In recent years, with the promotion of green development concepts, new aquaculture models such as ecological farming and recirculating aquaculture systems have gradually become mainstream.

[0003] Currently, golden pomfret farming mainly includes pond culture, cage culture, and recirculating aquaculture systems (RAS). Pond culture is low-cost and technologically mature, but it suffers from challenges such as difficult water quality management and susceptibility to disease. In recent years, ecological and recirculating aquaculture systems have gained increasing attention, as they improve farming efficiency while also contributing to environmental protection and resource conservation. However, traditional golden pomfret farming often employs a single-system approach, using cages or ponds of the same size throughout the entire process and feeding a single type of feed. This approach presents several problems: uneven growth rates: the growth requirements of fish from fry to adults vary significantly, and a single feed cannot meet the nutritional needs of different stages; difficulty in disease control: high-density farming and a single environment easily lead to frequent disease outbreaks, such as bacterial enteritis and furunculosis; limited farming efficiency: under traditional farming methods, golden pomfret have a long growth cycle and low survival rates, making it difficult to maximize economic benefits. Therefore, providing a more scientific and efficient farming solution is of great significance for improving the growth rate, survival rate, and farming efficiency of golden pomfret. Summary of the Invention

[0004] The purpose of this invention is to provide a segmented farming method for golden pomfret, which adjusts the farming method according to the needs of different growth stages of golden pomfret, shortens the farming cycle, and increases unit yield and economic benefits.

[0005] This invention provides a segmented farming method for golden pomfret, the method comprising the following steps: Fry rearing stage: control the water temperature at 25℃~28℃, the salinity at 25‰~35‰, maintain natural light, control the light intensity at 800~1200 Lux, and the light duration at 8~10 hours per day; mix the starter feed with licorice powder and feed it to the fish. Juvenile fish rearing: When the fry reach a body length of 2.5~3.5cm, control the water temperature at 25℃~27℃ and the salinity at 30‰~32‰, provide blue light irradiation, control the light intensity at 2000~3000Lux, and the light duration at 10~12h per day; mix the juvenile fish feed with licorice powder and feed it to the fish. Medium-sized fish rearing: When the juvenile fish reach a length of 13-15cm, control the water temperature at 23℃-25℃ and the salinity at 28‰-30‰, provide blue light irradiation, control the light intensity at 3000-5000Lux, and provide 12-14 hours of light per day; mix melatonin with the medium-sized fish feed and feed it to them. Adult fish rearing: When the fish reach a length of 28-30cm, control the water temperature at 20℃-23℃ and the salinity at 25‰-28‰. Provide blue light irradiation, controlling the light intensity at 5000-8000 Lux and the light duration at 12-14 hours per day. Mix melatonin with adult fish feed and feed it to the fish. Golden pomfret are harvested when they reach a length of 40cm or more and a weight of 1.5kg or more.

[0006] Preferably, the starter feed is given 4 times a day, and the amount given each time is 10% to 15% of the fish fry's weight; the amount of licorice powder is 0.1% to 1% of the starter feed's weight.

[0007] Preferably, the juvenile fish feed is given 4-5 times a day, with each feeding amount being 15%-20% of the juvenile fish's body weight; the amount of licorice powder used is 0.1%-1% of the juvenile fish feed weight. This invention, by administering licorice powder to golden pomfret fry and juveniles, can effectively improve the immunity and feed conversion rate of golden pomfret, further enhancing their growth performance.

[0008] Preferably, the medium-sized fish feed is given 3 to 4 times a day, and the amount given each time is 10% to 15% of the medium-sized fish's body weight; the amount of melatonin is 0.01‰ to 0.02‰ of the medium-sized fish feed weight.

[0009] Preferably, the adult fish feed is given 2-3 times a day, with each feeding amount being 5%-10% of the adult fish's body weight; the amount of melatonin used is 0.01‰-0.02‰ of the adult fish feed mass.

[0010] Preferably, the dissolved oxygen content in the water is ≥5mg / L throughout the entire aquaculture process.

[0011] Preferably, the starter feed consists of rotifers and / or Artemia nauplii.

[0012] Preferably, the composition of the juvenile fish feed is: 30wt%~40wt% fish meal, 25wt%~35wt% defatted corn flour, 10wt%~20wt% soybean meal, 3wt%~5wt% brewer's yeast, 5wt%~15wt% shrimp meal, 2wt%~4wt% emulsified coconut oil, and 0.5wt%~1wt% compound minerals.

[0013] Preferably, the composition of the fish feed is as follows: 25wt%~30wt% fish meal, 18wt%~20wt% defatted corn flour, 22wt%~26wt% soybean meal, 2wt%~4wt% brewer's yeast, 8wt%~10wt% shrimp meal, 7wt%~9wt% emulsified coconut oil, 1wt%~2wt% lecithin, 0.5wt%~1wt% compound vitamins, and 1wt%~1.5wt% compound minerals.

[0014] Preferably, the composition of the adult fish feed is as follows: 25wt%~35wt% fish meal, 10wt%~15wt% defatted corn flour, 20wt%~25wt% soybean meal, 5wt%~8wt% brewer's yeast, 8wt%~15wt% shrimp meal, 3wt%~5wt% spirulina powder, 5wt%~7wt% emulsified coconut oil, 1wt%~2wt% lecithin, 0.5wt%~1wt% compound vitamins, and 1wt%~1.5wt% compound minerals.

[0015] The beneficial effects of this invention are: Improving Growth Rate: The segmented aquaculture method provided by this invention precisely supplies nutrients according to the different growth stages of golden pomfret, significantly improving growth rate. This invention adjusts water temperature for different growth stages of golden pomfret. In the fry stage, the water temperature is controlled at 25℃~28℃ to promote rapid growth. As the fry grow, the water temperature is appropriately lowered to 23℃~25℃ to help stabilize growth in the mid-sized fish stage. In the adult stage, the water temperature is further lowered to 20℃~23℃, which is beneficial to the health and meat quality of the adult fish. Providing blue light irradiation during the growth stage not only promotes growth but also enhances the fish's immunity, regulates their physiological rhythms, and reduces the incidence of disease.

[0016] Reduced disease incidence: By optimizing the breeding environment and feed formulation, the incidence of diseases, especially bacterial enteritis and furunculosis, has been reduced.

[0017] Shortening the breeding cycle: Precise environmental control and nutrient supply have shortened the breeding cycle of golden pomfret and improved breeding efficiency.

[0018] Improved economic efficiency: Segmented breeding increased unit yield and survival rate, significantly improving economic efficiency.

[0019] Boosting immunity: Adding licorice powder and melatonin to the feed enhances the immunity of golden pomfret and reduces the need for medication. Detailed Implementation

[0020] To further illustrate the present invention, the following detailed description of a segmented farming method for golden pomfret provided by the present invention is provided in conjunction with embodiments, but these should not be construed as limiting the scope of protection of the present invention.

[0021] Example 1 Prepare the feed in advance according to the following proportions: Starter feed: Rotifers.

[0022] Juvenile fish feed: 35wt% fish meal, 25wt% defatted cornmeal, 15wt% soybean meal, 5wt% brewer's yeast, 15wt% shrimp meal, 4wt% emulsified coconut oil, and 1wt% compound minerals.

[0023] Medium-sized fish feed: 28wt% fish meal, 20wt% defatted corn flour, 26wt% soybean meal, 4wt% brewer's yeast, 10wt% shrimp meal, 8wt% emulsified coconut oil, 2wt% lecithin, 1wt% compound vitamins and 1wt% compound minerals.

[0024] Adult fish feed: 32wt% fish meal, 10wt% defatted corn flour, 25wt% soybean meal, 6wt% brewer's yeast, 13wt% shrimp meal, 4wt% spirulina powder, 6wt% emulsified coconut oil, 1.5wt% lecithin, 1wt% compound vitamins and 1.5wt% compound minerals.

[0025] Fry rearing stage: Control the water temperature at 26℃ and the salinity at 27‰, maintain natural light exposure, control the light intensity at 1000 Lux, and the light duration at 9 hours per day; mix the starter feed with licorice powder and feed it to the fry, with the amount of licorice powder being 0.8% of the starter feed weight; feed 4 times a day, with each feeding amount being 12% of the fry weight; Juvenile fish rearing: When the fry reach a length of 2.5-3.5cm, maintain a water temperature of 27℃ and a salinity of 32‰. Provide blue light illumination at an intensity of 2500 Lux for 12 hours daily. Mix juvenile fish feed with licorice powder, using 1% of the feed weight. Feed five times daily, with each feeding amount being 15% of the juvenile fish's weight. Medium-sized fish rearing: When the juvenile fish reach a length of 13-15cm, control the water temperature at 24℃ and the salinity at 28‰, and provide blue light irradiation with a light intensity of 4000Lux for 14 hours per day; mix melatonin with the medium-sized fish feed and feed it to the fish at a dosage of 0.01‰ of the feed weight; feed three times a day, with each feeding amount being 10% of the fish's body weight. Adult fish rearing: When the fish reach a length of 28-30cm, maintain a water temperature of 22℃ and a salinity of 25‰. Provide blue light irradiation at an intensity of 6000 Lux for 14 hours daily. Mix melatonin with the adult fish feed and feed at a dosage of 0.02‰ of the feed weight. Feed three times a day, with each feeding amount being 6% of the adult fish's body weight. Golden pomfret are harvested when they reach a length of 40cm or more and a weight of 500g or more.

[0026] Example 2 Prepare the feed in advance according to the following proportions: Starter feed: Artemia nauplii.

[0027] Juvenile fish feed: 40wt% fish meal, 25wt% defatted cornmeal, 20wt% soybean meal, 5wt% brewer's yeast, 5wt% shrimp meal, 4wt% emulsified coconut oil, and 1wt% compound minerals.

[0028] Medium-sized fish feed: 30wt% fishmeal, 20wt% defatted cornmeal, 24wt% soybean meal, 3wt% brewer's yeast, 10wt% shrimp meal, 9wt% emulsified coconut oil, 2wt% lecithin, 0.5wt% compound vitamins and 1.5wt% compound minerals.

[0029] Adult fish feed: 35wt% fish meal, 10wt% defatted corn flour, 25wt% soybean meal, 5wt% brewer's yeast, 14wt% shrimp meal, 3wt% spirulina powder, 5wt% emulsified coconut oil, 1wt% lecithin, 1wt% compound vitamins and 1wt% compound minerals.

[0030] Fry rearing stage: Control the water temperature at 26℃ and the salinity at 27‰, maintain natural light exposure, control the light intensity at 1000 Lux, and the light duration at 9 hours per day; mix the starter feed with licorice powder and feed, with the amount of licorice powder being 0.8% of the starter feed weight; feed 4 times a day, with each feeding amount being 10% of the fry weight; Juvenile fish rearing: When the fry reach a length of 2.5-3.5cm, maintain a water temperature of 27℃ and a salinity of 32‰. Provide blue light illumination at an intensity of 2500 Lux for 12 hours daily. Mix juvenile fish feed with licorice powder, using 1% of the feed weight. Feed five times daily, with each feeding amount being 15% of the juvenile fish's weight. Medium-sized fish rearing: When the juvenile fish reach a length of 13-15cm, control the water temperature at 24℃ and the salinity at 28‰, and provide blue light irradiation with a light intensity of 4000Lux for 14 hours per day; mix melatonin with the medium-sized fish feed and feed it to the fish at a dosage of 0.01‰ of the feed weight; feed three times a day, with each feeding amount being 10% of the fish's body weight. Adult fish rearing: When the fish reach a length of 28-30cm, maintain a water temperature of 22℃ and a salinity of 25‰. Provide blue light irradiation at an intensity of 6000 Lux for 14 hours daily. Mix melatonin with the adult fish feed and feed at a dosage of 0.02‰ of the feed weight. Feed three times a day, with each feeding amount being 6% of the adult fish's body weight. Golden pomfret are harvested when they reach a length of 40cm or more and a weight of 500g or more.

[0031] Example 3 Starter feed: Rotifers.

[0032] Juvenile fish feed: 30wt% fish meal, 25wt% defatted cornmeal, 20wt% soybean meal, 5wt% brewer's yeast, 15wt% shrimp meal, 4wt% emulsified coconut oil, and 1wt% compound minerals.

[0033] Medium-sized fish feed: 27wt% fishmeal, 20wt% defatted cornmeal, 26wt% soybean meal, 4wt% brewer's yeast, 10wt% shrimp meal, 9wt% emulsified coconut oil, 2wt% lecithin, 0.5wt% compound vitamins and 1.5wt% compound minerals.

[0034] Adult fish feed: 25wt% fish meal, 11wt% defatted cornmeal, 25wt% soybean meal, 8wt% brewer's yeast, 15wt% shrimp meal, 5wt% spirulina powder, 7wt% emulsified coconut oil, 2wt% lecithin, 0.5wt% compound vitamins and 1.5wt% compound minerals.

[0035] Fry rearing stage: Control the water temperature at 26℃ and the salinity at 27‰, maintain natural light exposure, control the light intensity at 1000 Lux, and the light duration at 9 hours per day; mix the starter feed with licorice powder and feed, with the amount of licorice powder being 0.8% of the starter feed weight; feed 4 times a day, with each feeding amount being 15% of the fry weight; Juvenile fish rearing: When the fry reach a length of 2.5-3.5cm, maintain a water temperature of 27℃ and a salinity of 32‰. Provide blue light illumination at an intensity of 2500 Lux for 12 hours daily. Mix juvenile fish feed with licorice powder, using 1% of the feed weight. Feed five times daily, with each feeding amount being 15% of the juvenile fish's weight. Medium-sized fish rearing: When the juvenile fish reach a length of 13-15cm, control the water temperature at 24℃ and the salinity at 28‰, and provide blue light irradiation with a light intensity of 4000Lux for 14 hours per day; mix melatonin with the medium-sized fish feed and feed it to the fish at a dosage of 0.01‰ of the feed weight; feed three times a day, with each feeding amount being 10% of the fish's body weight. Adult fish rearing: When the fish reach a length of 28-30cm, maintain a water temperature of 22℃ and a salinity of 25‰. Provide blue light irradiation at an intensity of 6000 Lux for 14 hours daily. Mix melatonin with the adult fish feed and feed at a dosage of 0.02‰ of the feed weight. Feed three times a day, with each feeding amount being 6% of the adult fish's body weight. Golden pomfret are harvested when they reach a length of 40cm or more and a weight of 500g or more.

[0036] Comparative Example 1 Prepare the feed in advance according to the following proportions: Starter feed: Rotifers.

[0037] Juvenile fish feed: 35wt% fish meal, 25wt% defatted cornmeal, 15wt% soybean meal, 5wt% brewer's yeast, 15wt% shrimp meal, 4wt% emulsified coconut oil, and 1wt% compound minerals.

[0038] Medium-sized fish feed: 28wt% fish meal, 20wt% defatted corn flour, 26wt% soybean meal, 4wt% brewer's yeast, 10wt% shrimp meal, 8wt% emulsified coconut oil, 2wt% lecithin, 1wt% compound vitamins and 1wt% compound minerals.

[0039] Adult fish feed: 32wt% fish meal, 10wt% defatted corn flour, 25wt% soybean meal, 6wt% brewer's yeast, 13wt% shrimp meal, 4wt% spirulina powder, 6wt% emulsified coconut oil, 1.5wt% lecithin, 1wt% compound vitamins and 1.5wt% compound minerals.

[0040] Fry rearing stage: Control the water temperature at 26℃, the salinity at 27‰, maintain natural light exposure, control the light intensity at 1000 Lux, and the light duration at 9 hours per day; feed the fry four times a day with starter feed, each time the amount of feed is 12% of the fry's weight; Juvenile fish rearing: When the fry reach a body length of 2.5~3.5cm, control the water temperature at 27℃ and the salinity at 32‰, provide blue light irradiation, control the light intensity at 2500Lux, and provide 12 hours of light per day; feed the juvenile fish 5 times a day, with each feeding amount being 15% of the juvenile fish's weight; Medium-sized fish rearing: When the juvenile fish reach a length of 13-15cm, control the water temperature at 24℃ and the salinity at 28‰, provide blue light irradiation, control the light intensity at 4000Lux, and provide 14 hours of light per day; feed the medium-sized fish three times a day, with each feeding amount being 10% of the medium-sized fish's body weight; Adult fish rearing: When the fish reach a length of 28-30cm, control the water temperature at 22℃ and the salinity at 25‰, provide blue light irradiation, control the light intensity at 6000Lux, and provide 14 hours of light per day; feed the fish three times a day with adult fish feed, each time the amount of feed is 6% of the adult fish's body weight; Golden pomfret are harvested when they reach a length of 40cm or more and a weight of 500g or more.

[0041] Comparative Example 2 Prepare the feed in advance according to the following proportions: Starter feed: Rotifers.

[0042] Juvenile fish feed: 35wt% fish meal, 25wt% defatted cornmeal, 15wt% soybean meal, 5wt% brewer's yeast, 15wt% shrimp meal, 4wt% emulsified coconut oil, and 1wt% compound minerals.

[0043] Medium-sized fish feed: 28wt% fish meal, 20wt% defatted corn flour, 26wt% soybean meal, 4wt% brewer's yeast, 10wt% shrimp meal, 8wt% emulsified coconut oil, 2wt% lecithin, 1wt% compound vitamins and 1wt% compound minerals.

[0044] Adult fish feed: 32wt% fish meal, 10wt% defatted corn flour, 25wt% soybean meal, 6wt% brewer's yeast, 13wt% shrimp meal, 4wt% spirulina powder, 6wt% emulsified coconut oil, 1.5wt% lecithin, 1wt% compound vitamins and 1.5wt% compound minerals.

[0045] Fry rearing stage: Control the water temperature at 26℃ and the salinity at 27‰, maintain natural light exposure, control the light intensity at 1000 Lux, and the light duration at 9 hours per day; mix the starter feed with licorice powder and feed it to the fry, with the amount of licorice powder being 0.8% of the starter feed weight; feed 4 times a day, with each feeding amount being 12% of the fry weight; Juvenile fish rearing: When the fry reach a length of 2.5-3.5cm, maintain a water temperature of 27℃ and a salinity of 32‰, and provide natural light with an intensity of 2500Lux for 12 hours per day. Mix juvenile fish feed with licorice powder, using 1% of the feed weight. Feed five times a day, with each feeding amount being 15% of the juvenile fish's weight. Medium-sized fish rearing: When the juvenile fish reach a length of 13-15cm, control the water temperature at 24℃ and the salinity at 28‰, maintain natural light exposure, and control the light intensity at 4000Lux for 14 hours per day; mix melatonin with the medium-sized fish feed and feed it to the fish at a dosage of 0.01‰ of the feed weight; feed three times a day, with each feeding amount being 10% of the fish's body weight. Adult fish rearing: When the fish reach a length of 28-30cm, maintain a water temperature of 22℃ and a salinity of 25‰, and provide natural light, controlling the light intensity to 6000Lux for 14 hours per day. Mix melatonin with the adult fish feed and feed it to the fish at a dosage of 0.02‰ of the feed weight. Feed three times a day, with each feeding amount being 6% of the adult fish's body weight. Golden pomfret are harvested when they reach a length of 40cm or more and a weight of 500g or more.

[0046] Comparative Example 3 Prepare the feed in advance according to the following proportions: Starter feed: Rotifers.

[0047] Juvenile fish feed: 35wt% fish meal, 25wt% defatted cornmeal, 15wt% soybean meal, 5wt% brewer's yeast, 15wt% shrimp meal, 4wt% emulsified coconut oil, and 1wt% compound minerals.

[0048] Medium-sized fish feed: 28wt% fish meal, 20wt% defatted corn flour, 26wt% soybean meal, 4wt% brewer's yeast, 10wt% shrimp meal, 8wt% emulsified coconut oil, 2wt% lecithin, 1wt% compound vitamins and 1wt% compound minerals.

[0049] Adult fish feed: 32wt% fish meal, 10wt% defatted corn flour, 25wt% soybean meal, 6wt% brewer's yeast, 13wt% shrimp meal, 4wt% spirulina powder, 6wt% emulsified coconut oil, 1.5wt% lecithin, 1wt% compound vitamins and 1.5wt% compound minerals.

[0050] Throughout the aquaculture process, the water temperature was controlled at 26℃, the salinity at 28‰, and natural light was maintained, with the light intensity controlled at 2000 Lux and the daily light duration at 12 hours. Fry rearing stage: Mix the starter feed with licorice powder and feed, with the amount of licorice powder being 0.8% of the starter feed weight; feed 4 times a day, with each feeding amount being 12% of the fry weight; Juvenile fish rearing: When the fry reach a body length of 2.5~3.5cm, mix the juvenile fish feed with licorice powder and feed them. The amount of licorice powder should be 1% of the weight of the juvenile fish feed. Feed them 5 times a day, with each feeding amount being 15% of the weight of the juvenile fish. Medium-sized fish rearing: When the juvenile fish reach a length of 13-15cm, mix melatonin with the medium-sized fish feed and feed it to the fish. The amount of melatonin should be 0.01‰ of the weight of the medium-sized fish feed. Feed the fish three times a day, with each feeding amount being 10% of the fish's body weight. Adult fish rearing: When the fish reach a length of 28-30cm, mix melatonin with adult fish feed and feed them. The amount of melatonin should be 0.02‰ of the weight of the adult fish feed. Feed them 3 times a day, with each feeding amount being 6% of the adult fish's body weight. Golden pomfret are harvested when they reach a length of 40cm or more and a weight of 500g or more.

[0051] Comparative Example 4 Prepare the feed in advance according to the following proportions: Starter feed: Rotifers.

[0052] Juvenile fish feed: 35wt% fish meal, 25wt% defatted cornmeal, 15wt% soybean meal, 5wt% brewer's yeast, 15wt% shrimp meal, 4wt% emulsified coconut oil, and 1wt% compound minerals.

[0053] Medium-sized fish feed: 28wt% fish meal, 20wt% defatted corn flour, 26wt% soybean meal, 4wt% brewer's yeast, 10wt% shrimp meal, 8wt% emulsified coconut oil, 2wt% lecithin, 1wt% compound vitamins and 1wt% compound minerals.

[0054] Adult fish feed: 32wt% fish meal, 10wt% defatted corn flour, 25wt% soybean meal, 6wt% brewer's yeast, 13wt% shrimp meal, 4wt% spirulina powder, 6wt% emulsified coconut oil, 1.5wt% lecithin, 1wt% compound vitamins and 1.5wt% compound minerals.

[0055] Fry rearing stage: Control the water temperature at 26℃, the salinity at 27‰, maintain natural light exposure, control the light intensity at 1000 Lux, and the light duration at 9 hours per day; feed the fry four times a day with starter feed, each time the amount of feed is 12% of the fry's weight; Juvenile fish rearing: When the fry reach a body length of 2.5~3.5cm, control the water temperature at 27℃ and the salinity at 32‰, provide blue light irradiation, control the light intensity at 2500Lux, and provide 12 hours of light per day; feed the juvenile fish 5 times a day, with each feeding amount being 15% of the juvenile fish's weight; Medium-sized fish rearing: When the juvenile fish reach a length of 13-15cm, control the water temperature at 24℃ and the salinity at 28‰, and provide blue light irradiation with a light intensity of 4000Lux for 14 hours per day; mix melatonin with the medium-sized fish feed and feed it to the fish at a dosage of 0.01‰ of the feed weight; feed three times a day, with each feeding amount being 10% of the fish's body weight. Adult fish rearing: When the fish reach a length of 28-30cm, maintain a water temperature of 22℃ and a salinity of 25‰. Provide blue light irradiation at an intensity of 6000 Lux for 14 hours daily. Mix melatonin with the adult fish feed and feed at a dosage of 0.02‰ of the feed weight. Feed three times a day, with each feeding amount being 6% of the adult fish's body weight. Golden pomfret are harvested when they reach a length of 40cm or more and a weight of 500g or more.

[0056] Test Example 1 1. From the time the fish fry were released until all the golden pomfret in Examples 1-3 and Comparative Examples 1-3 reached 500g, the time required for the fish to grow from stocking fry to reaching 500g or more was recorded for Examples 1-3 and Comparative Examples 1-3. 200 fish fry were randomly selected from each group for recording, and the average value was calculated. Furthermore, the disease rate and survival rate of the golden pomfret in Examples 1-3 and Comparative Examples 1-3 were statistically analyzed from stocking fry to reaching 500g.

[0057] The results are shown in Table 1.

[0058] Table 1. Time required for golden pomfret to grow to 500g, morbidity rate and survival rate

[0059] As shown in Table 1, the method provided by the present invention can effectively shorten the breeding cycle of golden pomfret, improve the disease rate of golden pomfret, increase the survival rate of fish fry, and thus improve economic benefits.

[0060] Test Example 2 The quality of 500g adult fish produced in Examples 1 to 3 and Comparative Examples 1 to 3 was tested respectively.

[0061] Evaluation process Appearance quality evaluation: The appearance of the fish is observed and scored by professional technicians.

[0062] Meat quality evaluation: Protein content and unsaturated fatty acid content are tested in the laboratory, and meat elasticity is tested manually.

[0063] Taste quality evaluation: Blind tasters conducted a test and scored the product based on umami, tenderness, delicacy and overall taste.

[0064] The quality evaluation criteria are as follows, and the results are shown in Table 2.

[0065] I. Appearance Quality (30 points in total) Color (10 points) 10 points: The fish has a bright color, silvery white or light yellow, without any dullness, blackening or yellowing.

[0066] 7 points: The color is good, but there are slight unevenness or local dark spots.

[0067] 5 points: The color is average, with obvious dullness or yellowing.

[0068] 3 points: Poor color, overall dull or black.

[0069] 0 points: The color is extremely poor and there are obvious signs of spoilage.

[0070] Body proportions (10 points) 10 points: Well-proportioned body, long body, and head in proportion to body.

[0071] 7 points: The body shape is relatively well-proportioned, but there is a slight disharmony.

[0072] 5 points: Average body type, with noticeable disproportion.

[0073] 3 points: Uneven body shape with obvious deformities.

[0074] 0 points: Severe physical deformity, affecting the value of the product.

[0075] 3. Fin integrity (10 points) 10 points: The fins are intact, without damage or missing parts.

[0076] 7 points: The fins are mostly intact, with minor damage.

[0077] 5 points: The fins are partially damaged or missing.

[0078] 3 points: The fins are severely damaged, affecting the fish's appearance.

[0079] 0 points: The fins are severely missing or damaged and cannot be repaired.

[0080] II. Meat Quality (30 points maximum) Protein content (10 points) 10 points: Protein content ≥ 20%.

[0081] 8 points: Protein content is between 18% and 20%.

[0082] 5 points: Protein content is between 15% and 18%.

[0083] 3 points: Protein content is between 12% and 15%.

[0084] 0 points: Protein content <12%.

[0085] Unsaturated fatty acid content (10 points) 10 points: Unsaturated fatty acid content ≥15%.

[0086] 8 points: The content of unsaturated fatty acids is between 12% and 15%.

[0087] 5 points: The content of unsaturated fatty acids is between 8% and 12%.

[0088] 3 points: The content of unsaturated fatty acids is between 5% and 8%.

[0089] 0 points: Unsaturated fatty acid content <5%.

[0090] Meat elasticity (10 points) 10 / 10: The meat is firm and elastic, and it quickly recovers its shape after being pressed.

[0091] 7 points: The meat is relatively firm and has good elasticity.

[0092] 5 points: The meat quality and elasticity are average.

[0093] 3 points: The meat is soft and lacks elasticity.

[0094] 0 points: The meat is loose and lacks elasticity.

[0095] III. Taste and Quality (out of 40 points) Umami (10 points) 10 points: Rich in umami flavor, with no fishy or other off-flavors.

[0096] 7 points: Strong umami flavor with a slight fishy smell.

[0097] 5 points: The umami flavor is average, and the fishy smell is quite noticeable.

[0098] 3 points: Mild umami flavor, strong fishy smell.

[0099] 0 points: No freshness, strong fishy smell or other unpleasant odor.

[0100] Tenderness (10 points) 10 / 10: The meat is tender and melts in your mouth.

[0101] 7 points: The meat is relatively tender, with a slight chewiness.

[0102] 5 points: The meat quality is average, with a noticeable chewiness.

[0103] 3 points: The meat is tough and difficult to chew.

[0104] 0 points: The meat is extremely tough and inedible.

[0105] Texture smoothness (10 points) 10 / 10: The texture is smooth and there is no roughness.

[0106] 7 points: The texture is relatively delicate, with a slightly rough feel.

[0107] 5 points: The taste is average, with a noticeably rough texture.

[0108] 3 points: The texture is rough, which affects the eating experience.

[0109] 0 points: The taste is extremely poor and it is inedible.

[0110] Overall taste (10 / 10) 10 / 10: Excellent overall taste, tender, delicate, and without any off-flavors.

[0111] 7 points: Good taste, but with minor shortcomings.

[0112] 5 stars: The taste is average and has obvious shortcomings.

[0113] 3 points: Poor taste, affecting the eating experience.

[0114] 0 points: Extremely poor taste, inedible.

[0115] Overall score 90-100 points: High-quality golden pomfret, excellent quality.

[0116] 80-89 points: Good quality golden pomfret.

[0117] 70-79 points: Medium-quality golden pomfret, average quality.

[0118] 60-69 points: Qualified golden pomfret, acceptable quality.

[0119] <60 points: Unqualified golden pomfret, poor quality.

[0120] Table 2 Quality Evaluation of Golden Pomfret

[0121] As shown in Table 2, compared with the comparative example, the golden pomfret produced in Examples 1 to 3 are of better quality, indicating that the method provided by the present invention is beneficial to improving the quality of golden pomfret.

[0122] Although the above embodiments have provided a detailed description of the present invention, they are only some embodiments of the present invention, and not all embodiments. People can obtain other embodiments based on these embodiments without creative effort, and these embodiments all fall within the protection scope of the present invention.

Claims

1. A segmented farming method for golden pomfret, characterized in that, The method includes the following steps: Fry rearing stage: control the water temperature at 25℃~28℃, the salinity at 25‰~35‰, maintain natural light, control the light intensity at 800~1200 Lux, and the light duration at 8~10 hours per day; mix the starter feed with licorice powder and feed it to the fish. Juvenile fish rearing: When the fry reach a body length of 2.5~3.5cm, control the water temperature at 25℃~27℃ and the salinity at 30‰~32‰, provide blue light irradiation, control the light intensity at 2000~3000Lux, and the light duration at 10~12h per day; mix the juvenile fish feed with licorice powder and feed it to the fish. Medium-sized fish rearing: When the juvenile fish reach a length of 13-15cm, control the water temperature at 23℃-25℃ and the salinity at 28‰-30‰, provide blue light irradiation, control the light intensity at 3000-5000Lux, and provide 12-14 hours of light per day; mix melatonin with the medium-sized fish feed and feed it to them. Adult fish rearing: When the fish reach a length of 28-30cm, control the water temperature at 20℃-23℃ and the salinity at 25‰-28‰. Provide blue light irradiation, controlling the light intensity at 5000-8000 Lux and the light duration at 12-14 hours per day. Mix melatonin with adult fish feed and feed it to the fish. Golden pomfret are harvested when they reach a length of 40cm or more and a weight of 1.5kg or more.

2. The method according to claim 1, characterized in that, The starter feed is given 4 times a day, with each feeding amount being 10% to 15% of the fish fry's weight; the amount of licorice powder used is 0.1% to 1% of the starter feed's weight.

3. The method according to claim 1, characterized in that, The juvenile fish feed is given 4-5 times a day, with each feeding amount being 15%-20% of the juvenile fish's body weight; the amount of licorice powder used is 0.1%-1% of the juvenile fish feed mass.

4. The method according to claim 1, characterized in that, The medium-sized fish feed is given 3-4 times a day, with each feeding amount being 10%-15% of the medium-sized fish's body weight; the dosage of melatonin is 0.01‰-0.02‰ of the medium-sized fish feed weight.

5. The method according to claim 1, characterized in that, The adult fish feed is given 2-3 times a day, with each feeding amount being 5%-10% of the adult fish's body weight; the amount of melatonin used is 0.01‰-0.02‰ of the adult fish feed weight.

6. The method according to claim 1, characterized in that, Throughout the aquaculture process, the dissolved oxygen content in the water must be ≥5mg / L.

7. The method according to claim 1, characterized in that, The starter feed consists of rotifers and / or Artemia nauplii.

8. The method according to claim 1, characterized in that, The composition of the juvenile fish feed is as follows: 30wt%~40wt% fish meal, 25wt%~35wt% defatted corn flour, 10wt%~20wt% soybean meal, 3wt%~5wt% brewer's yeast, 5wt%~15wt% shrimp meal, 2wt%~4wt% emulsified coconut oil, and 0.5wt%~1wt% compound minerals.

9. The method according to claim 1, characterized in that, The composition of the fish feed is as follows: fish meal 25wt%~30wt%, defatted corn flour 18wt%~20wt%, soybean meal 22wt%~26wt%, brewer's yeast 2wt%~4wt%, shrimp meal 8wt%~10wt%, emulsified coconut oil 7wt%~9wt%, lecithin 1wt%~2wt%, compound vitamins 0.5wt%~1wt%, and compound minerals 1wt%~1.5wt%.

10. The method according to claim 1, characterized in that, The composition of the adult fish feed is as follows: 25wt%~35wt% fish meal, 10wt%~15wt% defatted corn flour, 20wt%~25wt% soybean meal, 5wt%~8wt% brewer's yeast, 8wt%~15wt% shrimp meal, 3wt%~5wt% spirulina powder, 5wt%~7wt% emulsified coconut oil, 1wt%~2wt% lecithin, 0.5wt%~1wt% compound vitamins, and 1wt%~1.5wt% compound minerals.

Images