Pattern of Accumulation and Changes in Some Growth Parameters of Indian Flying Barb, Esomus danricus (Hamilton-Buchanan) during Sublethal Cadmium Exposure

摘要

In the present study, pattern of accumulation of three sublethal concentrations of cadmium (0.006,0.063 and 0.636 mg L 1) in different tissues and their effects on growth and somatic indices were determinedin Indian flying barb (Esomus danricus) at weekly interval for 28 days. At the end of 28 days of exposure, thetotal tissue cadmium concentration followed the pattern kidney > liver > gill >bone > flesh > brain for 0.063 and0.636 mg L 1 concentrations while for 0.006 mg L 1 exposure, accumulation pattern was kidney > gill > liver >bone > flesh=brain. Cd bio-magnified in all the studied tissues except brain and the rate of uptake of Cdincreased with time in the kidney, liver, bone and flesh but decreased in the gill. Cd also decreased body weight,brain and hepatosomatic index and increased kidney somatic index in a dose and exposure dependent manner.