1. Infrastructure
1.1 Fiberglass basin round, diameter 1m, depth 50cm, flute surface water supply, central bottom drainage, vertical elbow control water level, and can maintain constant flow.
1.2 The shape of the cement pool can be round or square, square is to avoid dead ends, the area is suitable for 10m2 ~ 15m2, the depth is 1m. It requires convenient drainage and drainage, drainage outlets, drainage level, and micro-flowing water.
1.3 Inflator Air Compressor, 2 bubble stone per fiberglass basin, Roots blower, and one anaerobic tube per concrete pool.
2. Seedlings, living environment, Amur sturgeon, domestic water environment require fresh water, high dissolved oxygen is higher than 6mg/l, optimum growth temperature is 18°C～24°C, and when it is lower than 4°C or higher than 27°C, artificial feed is rejected . The temperature should not change too much and must not exceed 5°C per day. PH value 7-8.
3, feed from the larvae opening to the end of the breeding, the use of compound feed throughout the particle size of 0.2 ~ 2.5mm. The early stage is micro-particle feed, and the later stage is sink feed. Juvenile fish protein requirements for 46% -50%. Juveniles have a protein requirement of 42%-45%. At the same time pay attention to the addition of highly unsaturated fatty acids to meet nutritional needs.
4, cultivation methods
4.1 Astragalus is divided into three stages according to growth
4.1.1 The larval stage The larvae have just broken into the glass fiber reinforced plastic pots and are reared at a density of 2000-3000 tails/m2. The water level is maintained at about 25 cm and the water flow rate is 15 liters/min. The larvae melanin suppository discharge indicates that the larvae are transferred from the vegetative period of the body to the mixed vegetative period, and the feed is opened for feeding, and the feed particle size is 0.2-0.4 mm. The density during this period was 1500-2000 tails/m2, the number of feedings was 8-12 times per day, and the daily feeding was 10%-12% of body weight.
4.1.2 Juvenile stages The larvae grow to 3 cm in size and they assume the shape of adult fish and are considered to enter the juvenile stage. Juvenile fish and 3-5cm, stocking density of 1000-1500 tail / m2, the water level is maintained at 30cm, the flow is 20 liters / minute. The grain size of the diet is 0.4-0.6mm, and the daily feeding amount is 7%-10% of the body weight. When the fish is 5-10cm in length, they are moved into the cement pool and stocked at a density of 400-800 tails/m2, the water level is kept at 35-40cm, the flow rate is 25 liters/min, and the bait size is 0.6-1mm. Feeding 6 times, the daily feeding amount is 5%-7% of body weight.
4.1.3 juvenile fish fry total length of 10cm, as juvenile fish into the stage, continue to feed in the cement pool, specifications for the 10-15cm stocking density of 300-500 / m2, the water level to maintain 40-50cm, flow rate 30 litres/minute. The number of feedings per day was reduced to 5, and the daily feeding amount was 5%-7% of the fish's body weight, and the feed particle size was 1-1.5 mm. When the fish is 15-20cm in length, the stocking density is 250-300 tails/m2, which is fed 4 times a day. The daily feeding amount is 4%-5% of body weight and the bait material diameter is 1.5-2.0cm.
4.2 Day-to-day management and disease prevention Carefully observe the pool daily to determine the physical and chemical factors of water on a regular basis. Measure the body weight and body length on the fifth day to determine the amount of bait. The water temperature is measured 3 times a day, and the water temperature is preferably controlled at 18°C-24°C. In line with the principles of human prevention and active treatment. The larval stage is best not to use drugs, juvenile stage to prevent the development of red mouth merchants, using "elimination" and internal methods. "Extinguishing": Quanchiposa salt water, so that the pool water concentration of 5 ‰-7 ‰, once every 3 days. Oral: furazolidone for feedstuffs, 2.5 grams per 100kg of fish. The juvenile stage prevents bacterial bleeding. "External drug": Quantum fluoride acid splash, 2g per cubic meter of water used for 3 days. Oral: Mixed oxytetracycline in feed, 3 g per 100.kg of fish, fed every other time.
1.1 Fiberglass basin round, diameter 1m, depth 50cm, flute surface water supply, central bottom drainage, vertical elbow control water level, and can maintain constant flow.
1.2 The shape of the cement pool can be round or square, square is to avoid dead ends, the area is suitable for 10m2 ~ 15m2, the depth is 1m. It requires convenient drainage and drainage, drainage outlets, drainage level, and micro-flowing water.
1.3 Inflator Air Compressor, 2 bubble stone per fiberglass basin, Roots blower, and one anaerobic tube per concrete pool.
2. Seedlings, living environment, Amur sturgeon, domestic water environment require fresh water, high dissolved oxygen is higher than 6mg/l, optimum growth temperature is 18°C～24°C, and when it is lower than 4°C or higher than 27°C, artificial feed is rejected . The temperature should not change too much and must not exceed 5°C per day. PH value 7-8.
3, feed from the larvae opening to the end of the breeding, the use of compound feed throughout the particle size of 0.2 ~ 2.5mm. The early stage is micro-particle feed, and the later stage is sink feed. Juvenile fish protein requirements for 46% -50%. Juveniles have a protein requirement of 42%-45%. At the same time pay attention to the addition of highly unsaturated fatty acids to meet nutritional needs.
4, cultivation methods
4.1 Astragalus is divided into three stages according to growth
4.1.1 The larval stage The larvae have just broken into the glass fiber reinforced plastic pots and are reared at a density of 2000-3000 tails/m2. The water level is maintained at about 25 cm and the water flow rate is 15 liters/min. The larvae melanin suppository discharge indicates that the larvae are transferred from the vegetative period of the body to the mixed vegetative period, and the feed is opened for feeding, and the feed particle size is 0.2-0.4 mm. The density during this period was 1500-2000 tails/m2, the number of feedings was 8-12 times per day, and the daily feeding was 10%-12% of body weight.
4.1.2 Juvenile stages The larvae grow to 3 cm in size and they assume the shape of adult fish and are considered to enter the juvenile stage. Juvenile fish and 3-5cm, stocking density of 1000-1500 tail / m2, the water level is maintained at 30cm, the flow is 20 liters / minute. The grain size of the diet is 0.4-0.6mm, and the daily feeding amount is 7%-10% of the body weight. When the fish is 5-10cm in length, they are moved into the cement pool and stocked at a density of 400-800 tails/m2, the water level is kept at 35-40cm, the flow rate is 25 liters/min, and the bait size is 0.6-1mm. Feeding 6 times, the daily feeding amount is 5%-7% of body weight.
4.1.3 juvenile fish fry total length of 10cm, as juvenile fish into the stage, continue to feed in the cement pool, specifications for the 10-15cm stocking density of 300-500 / m2, the water level to maintain 40-50cm, flow rate 30 litres/minute. The number of feedings per day was reduced to 5, and the daily feeding amount was 5%-7% of the fish's body weight, and the feed particle size was 1-1.5 mm. When the fish is 15-20cm in length, the stocking density is 250-300 tails/m2, which is fed 4 times a day. The daily feeding amount is 4%-5% of body weight and the bait material diameter is 1.5-2.0cm.
4.2 Day-to-day management and disease prevention Carefully observe the pool daily to determine the physical and chemical factors of water on a regular basis. Measure the body weight and body length on the fifth day to determine the amount of bait. The water temperature is measured 3 times a day, and the water temperature is preferably controlled at 18°C-24°C. In line with the principles of human prevention and active treatment. The larval stage is best not to use drugs, juvenile stage to prevent the development of red mouth merchants, using "elimination" and internal methods. "Extinguishing": Quanchiposa salt water, so that the pool water concentration of 5 ‰-7 ‰, once every 3 days. Oral: furazolidone for feedstuffs, 2.5 grams per 100kg of fish. The juvenile stage prevents bacterial bleeding. "External drug": Quantum fluoride acid splash, 2g per cubic meter of water used for 3 days. Oral: Mixed oxytetracycline in feed, 3 g per 100.kg of fish, fed every other time.
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