1.School of Life Science and Technology,Dalian Ocean University,Dalian 116023,China;2.South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences,Guangzhou 510300,China
Abstract: The activities of phenoloxidase(PO),superoxide dismutase(SOD),alkaline phosphatase(AKP),and acid phosphatase(ACP)and antibacterial activity(Ua)in the serum,hepatapancreas,and muscles and temperature,dissolved oxygen,ammonia,and nitrite were determined in two Pacific white leg shrimp Litopenaeus vannamei culture ponds(Pond 305#,Pond 301#)from June to August,2009 to evaluate the relationship between non-specific immunity and water quality.The activity of the non-specificity immune enzymes was significantly changed with change in the ammonia,and nitrite levels in the culture ponds,from higher activity of the non-specificity immune enzymes in Pond 301#with lower concentrations of the ammonia,and nitrite to the lower activity of the non-specificity immune enzymes in Pond 305#with higher concentrations of the ammonia,and nitrite,indicating that the key factors affecting the shrimp non-specific immunity were ammonia nitrogen and nitrite.
2011, Vol. 26 
