Author(s)

Jianguo Wang, Zhou Wang, Quan Wang, Ming Wang

Corresponding Author

Jianguo Wang

Abstract

In order to clarify the effects of photosynthetic bacteria on water quality improvement and non-specific immunity in Australian freshwater crayfish culture environment. Seedlings with an average body weight of 0.265 g were placed in a 50 L sink and various concentrations of Rhodop seudanonas palustris were applied. Ammonia nitrogen, nitrite nitrogen and pH were measured once every 5 days, and lysozyme and acid phosphatase were determined at 25 days. The results showed that the concentration of photosynthetic bacteria was 4×104cfu/ml, which could effectively control the increase of ammonia nitrogen and nitrite nitrogen, stabilize the pH value, increase the activity of lysozyme and acid phosphatase, and increase the survival rate and increase of seed. The concentration of photosynthetic bacteria was 4×104cfu/ml. The ammonia nitrogen and nitrite increased to different degrees, the pH decreased, the activity of lysozyme and acid phosphatase increased significantly, and the survival rate and weight gain rate of seedlings decreased significantly. The results showed that the photosynthetic bacteria concentration of 102-103 cfu / ml can effectively improve the water quality of breeding, improve the immunity and survival rate of shrimp, and the concentration may be inhibited if the concentration is too high.

Keywords

Photosynthetic bacteria; Australian freshwater lobster; Lysozyme (LZM); Acid phosphatase (ACP)