prevention of acute ammonia toxicity in beluga, huso huso, using natural zeolite

this study was accomplished to examine the efficiency of natural zeolite in preventing acute toxicity of total ammonia to huso huso. the study was performed using water static method in 96 hours. fish averaged 46 ? 5 g in weight and 22 ? 4 cm in total length were exposed to four different concentrations (15, 30, 50, 75 mgl-1) of ammonia and a group was considered as control. under stable condition, the lethal concentration of ionized ammonia was 75 mgl-1 in 96 hours. in the lethal concentration of total ammonia, different amounts of 5, 10, 15 g.l-1 granulated clinoptilolite zeolite were used. results indicated significant differences between treatments and control (p