(Xinjiang Shihezi Thermal Power Plant Farm Ma Lixin Wang Xinjun Shihezi Technical College Huang Lihong)
Aphids, also known as saltwater insects, are small, low-grade crustaceans that live in saltwater. The United States discovered in 1933 and applied it in aquaculture seed production. China began research in the late 1950s. In recent years, extensive attention has been paid to the cultivation of fry, shrimp, and crab seedlings.
1. Aphid hatching. Conventional hatching locust technology is used. The water temperature is controlled at 28°C, artificial seawater is prepared from coarse salt, sodium bicarbonate, and water, and the salinity is 2%. Incubation rate reached 75% after 24 hours incubation. The number of aphids hatched must be strictly calculated. The larvae of different producing areas have different salinity requirements for water bodies. Before hatching, they must first understand their origins. In addition, management must be strengthened to prevent insufficient supply of bait, resulting in a decrease in the survival rate, irregularities in the out-of-pool specifications, and an increase in costs.
2. Aphid feeding. After the yolk absorption of the fry was completed, the treated aphid-free nauplii was started to be fed. In the Shihezi Thermal Power Plant Farm in Xinjiang, 100,000 tails and 400,000 watercress were put into the two cement tanks of 100 square meters and 200 square meters, respectively. It was estimated that 80 g and 320 g of dormant eggs were required for the feeding amount of the two ponds. Based on this calculation, the proportion of hatched non-mother beasts in the two ponds was calculated to be 30.7% and 69.3%, respectively. When feeding, the proportion of each pool was allocated. Feed 3 times a day.
3. Water quality management. The quality of water quality is an important factor affecting the survival rate and the out-of-water specification of the pond. The fish will not enter the water within 2 days after entering the pool, and will maintain the microfluidic water afterwards to reach the required dissolved oxygen and water temperature for fry cultivation. After testing, the dissolved oxygen in the early stage was maintained at 4 mg/L or more, the water temperature was maintained at about 21°C, and the temperature difference between day and night was 2°C.
4. Effect analysis. According to the practice in the Shihezi Thermal Power Plant farm, through the analysis, the mites nauplii are used as fry for the fry cultivation, as long as the food supply is adequate, the survival rate of the fry is higher. And the water quality is not polluted. Shihezi Thermal Power Plant farms were tested and all larvae of the aphid-free nauplii were fed to Jianjian. After 10 days of cultivation, 70,000 and 300,000 Jianwa black owls with a size of 1.5 cm were harvested in two concrete pools of 100 m2 and 200 m2 respectively, and the survival rate of fry was 90% and 92%, respectively. However, due to the limited conditions of the farm, the water temperature is relatively low. If the water temperature is maintained at about 25°C, a larger fry size will be obtained.
Aphids, also known as saltwater insects, are small, low-grade crustaceans that live in saltwater. The United States discovered in 1933 and applied it in aquaculture seed production. China began research in the late 1950s. In recent years, extensive attention has been paid to the cultivation of fry, shrimp, and crab seedlings.
1. Aphid hatching. Conventional hatching locust technology is used. The water temperature is controlled at 28°C, artificial seawater is prepared from coarse salt, sodium bicarbonate, and water, and the salinity is 2%. Incubation rate reached 75% after 24 hours incubation. The number of aphids hatched must be strictly calculated. The larvae of different producing areas have different salinity requirements for water bodies. Before hatching, they must first understand their origins. In addition, management must be strengthened to prevent insufficient supply of bait, resulting in a decrease in the survival rate, irregularities in the out-of-pool specifications, and an increase in costs.
2. Aphid feeding. After the yolk absorption of the fry was completed, the treated aphid-free nauplii was started to be fed. In the Shihezi Thermal Power Plant Farm in Xinjiang, 100,000 tails and 400,000 watercress were put into the two cement tanks of 100 square meters and 200 square meters, respectively. It was estimated that 80 g and 320 g of dormant eggs were required for the feeding amount of the two ponds. Based on this calculation, the proportion of hatched non-mother beasts in the two ponds was calculated to be 30.7% and 69.3%, respectively. When feeding, the proportion of each pool was allocated. Feed 3 times a day.
3. Water quality management. The quality of water quality is an important factor affecting the survival rate and the out-of-water specification of the pond. The fish will not enter the water within 2 days after entering the pool, and will maintain the microfluidic water afterwards to reach the required dissolved oxygen and water temperature for fry cultivation. After testing, the dissolved oxygen in the early stage was maintained at 4 mg/L or more, the water temperature was maintained at about 21°C, and the temperature difference between day and night was 2°C.
4. Effect analysis. According to the practice in the Shihezi Thermal Power Plant farm, through the analysis, the mites nauplii are used as fry for the fry cultivation, as long as the food supply is adequate, the survival rate of the fry is higher. And the water quality is not polluted. Shihezi Thermal Power Plant farms were tested and all larvae of the aphid-free nauplii were fed to Jianjian. After 10 days of cultivation, 70,000 and 300,000 Jianwa black owls with a size of 1.5 cm were harvested in two concrete pools of 100 m2 and 200 m2 respectively, and the survival rate of fry was 90% and 92%, respectively. However, due to the limited conditions of the farm, the water temperature is relatively low. If the water temperature is maintained at about 25°C, a larger fry size will be obtained.