Acipenser sinensis is a warm-water fish with wide adaptability to water temperature. Under the condition of artificial culture, the suitable water temperature for the growth of Chinese sturgeon is about 14-24℃, and the optimum water temperature is 2 1℃. Water temperature plays an important role in the growth of Chinese sturgeon, which will lead to the decrease of food intake, slow growth and even death in low water temperature environment. Therefore, the temperature is preferably controlled at 20-25℃.
2. Oxygen content of aquaculture water source.
The Chinese sturgeon has a very high demand for dissolved oxygen in water, which is more than 5 mg. If the dissolved oxygen in the water decreases, the appetite of Chinese sturgeon will decrease, and when it is lower than 3 mg, the food intake will decrease, and even lead to death in severe cases. It should be noted that the Chinese sturgeon fry are very sensitive to dissolved oxygen, and the water quality with large changes in dissolved oxygen is not suitable as the water source for fry culture.
3. control of 3.PH value.
As a seasonal migratory fish, ACIPENSER sinensis also has certain requirements for the pH value of water quality. Acipenser sinensis is most suitable for living in weak alkaline water with PH value of 7-8. When the PH value decreases, it means that the carbon dioxide in the water increases and the oxygen content decreases, which will affect the growth and development of Chinese sturgeon. On the contrary, when the PH value of water is too high, it is also very unfavorable for Chinese sturgeon which is sensitive to ammonia nitrogen.
4. Salinity control.
Because ACIPENSER sinensis is a migratory fish, the requirement for water salinity is not so high.
5. Light intensity.
In the seedling stage, ACIPENSER sinensis has strong phototaxis. Generally speaking, light has no obvious effect on the growth and development of fry, but attention should be paid to the change of water temperature caused by light.
6. Ammonia nitrogen.
Ammonia nitrogen is mainly decomposed by organic matter in water, such as food residue and feces. Acipenser sinensis is very sensitive to ammonia nitrogen. Living in water with high ammonia nitrogen for a long time will lead to many diseases and even death. Therefore, we should attach great importance to the water quality of aquaculture at ordinary times, clean up the organic matter in the aquaculture pond in time and reduce the production of ammonia nitrogen.
7. water flow.
Because the Chinese sturgeon in nature is a migratory fish, it is necessary to simulate natural conditions as much as possible in artificial breeding to make it easy for Chinese sturgeon to lay eggs.
8. Feed selection.
Acipenser sinensis belongs to animal omnivorous fish, which mainly feeds on mollusks such as shrimp, crab and shellfish, and feeds on plankton or insect larvae in the water in the juvenile stage. Therefore, when feeding, we mainly choose animal feed or synthetic feed. Feed flexibly according to weather, water quality and fish density.
9. Daily inspection and management.
Patrol three times a day, especially in summer nights. Since Chinese sturgeon belongs to benthic fish, if floating head is found, it is necessary to check whether the dissolved oxygen in the water is too low in time and check the individual size difference of sturgeon regularly. If the size difference is too large, the pond should be strictly divided.