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¹ Key Field Scientific Observing and Experimental Station of Fishery Resources and Environment of the Middle and Upper Reaches of the Yangtze River of the Ministry of Agriculture, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Science, Wuhan, China DOI : 10.4194/1303-2712-v16_4_14 Viewed : 3811 - Downloaded : 2852 To gain a better understanding of the ultrasonic telemetry research and apply the ultrasonic telemetry into freshwater fish, we estimated the influence of surgical implantation of ultrasonic transmitters on the biochemical parameters of silver carp. The experiment was repeated thrice. SPSS 17.0 software was used for data processing. The results showed that The level of plasma glucose，total protein，globulin and aspartate aminotransferase (AST) in the sham and surgery groups increased significantly (P＜0.01) 1 day after surgery, on the contrary, The level of plasma Albumin and chlorine declined significantly when compared with the control group. After 7 days, the level of total protein, globulin and AST had declined but still remained higher for sham and surgery groups than control group, whereas the level of plasma glucose had declined to normal level. The level of plasma albumin in the sham and surgery groups continued to decline and they were significantly lower than control group (P＜0.01). After 14 days, there was no significant difference between the three groups. The level of triglycerides, cholesterol and alanine aminotransferase (ALT) showed no significant difference between the three groups in 1 day, 7 days and 14 days after surgery. Keywords : Surgical implantation, ultrasonic telemetry, biochemical parameters, silver carp Hypophthalmichthys molitrix