Abstract: Detections were made on the serum biochemical indices and ion concentrations of juvenile Chinese sturgeon (Acipenser sinensis) after exposed to the water body added with different concentration Cu²⁺ for 30 and 60 days, aimed to understand the toxic effect of Cu²⁺ on the juveniles. With the increasing concentration of Cu²⁺in water body, the concentrations of glucose (Glu), alkaline phosphatase (ALP), urea, total cholesterol (TC), and creatinine (CREA) in the serum increased, while that of triglycerides (TG) decreased.The Cu²⁺ had little effects on the concentrations of total protein (TP), aspartate aminotransferase (AST),alanine aminotransferase (ALT), and lactate dehydrogenase (LDH), and there were no significant differences in the test biochemical indices except ALP between the treatment low concentration Cu²⁺ and the control. At medium (0.89 μg·L^-1) and high (2.00 μg·L^-1) concentrations of Cu²⁺, the concentrations of GLU, ALP, urea, TC, CREA, and TG were significantly higher than those of the control (P<0.05). The  pH and Na⁺, Cl^-, and P concentrations decreased significantly with increasing concentration of Cu²⁺ while the Ca²⁺ and Mg²⁺ concentrations were in adverse, and the  K⁺ concentration was less affected. The minimum observable and the maximum unobservable effect concentrations of Cu²⁺  were 0.89 and 0.40 μg·L^-1, respectively. Among the test indices, ALP was most affected by Cu²⁺, and increased significantly with increasing time of Cu²⁺ exposure, being able to be the sensitive index of juvenile Chinese sturgeon under water body Cu²⁺ pollution.

Key words: Landscape, Spatial dynamic model, Remote sensing, GIS, Model test