Behaviour and morphology pattern analysis of Indian major carps fingerlings exposed to commercial diesel oil suspension

Increased demand for commercial petroleum derivatives, including diesel has increased the possibility of numerous spills and leakages into the aquatic environment worldwide that can directly or indirectly pollute waterbody disrupting the health status of fish species and other aquatic organisms. This study was conducted to understand the effects of commercial diesel oil on freshwater species of rui (Labeo rohita), catla (Catla catla), and mrigal (Cirrhinus mrigala) fingerlings. The fingerlings were exposed to four different concentrations (0; 0.25; 0.50 and 0.75 ppm) of diesel oil, each containing three replications for 96 h. After 96 h lethal concentration (LC50) for rui, 0.35 ppm; catla, 0.30 ppm; and mrigal fingerlings 0.3625 ppm, were calculated through probit analysis. Maximum mortality occurred at the highest…