Effects of copper sulfate and lead nitrate exposure on caspian sea kutum survival and behavior
Keywords:
Copper sulfate, lead nitrate, Rutilus frisii kutum, Caspian sea kutum,, physiological responses, median lethal concentration (LC50).Abstract
The aim of present study was to determine the LC50 value of in Caspian sea kutum. The results
indicated that median lethal concentration (LC50) of Caspian sea kutum (RUTILUS FRISII KUTUM) for 24,
48, 72 and 96 h of exposure are 2.944, 2.756, 2.562 and 2.310 ppm, respectively and median lethal
concentration (LC50) of lead to Caspian sea kutum (R. FRISII KUTUM) for 24, 48, 72 and 96 h of exposure
as 315.841, 298.456, 281.419 and 268.065 ppm, respectively. LC50 increased with decrease in mean
exposure times for both metals. Physiological responses like rapid opercular movement and frequent
gulping of air was observed during the initial stages of exposure after which it became occasional. All
these observations can be considered to monitor the quality of aquatic ecosystem and severity of
pollution. Hence, concluded that copper is more toxic than lead for Caspian sea kutum (R. FRISII
KUTUM).
