The objective of this study was to evaluate the effect of commercial formulation of triazophos on
esterase activity in the liver, kidney, brain, blood and muscles of Catla catla, Labeo rohita and
Cirrhinus mrigala fingerlings. Toxicity of triazophos was tested in the fingerlings of major carps
following static bioassay and probit analysis. The fingerlings of C. catla, L. rohita and C. mrigala
were exposed to three sub lethal concentrations: 1/5th (0.97, 0.48, 0.32), 1/10th (1.33, 0.66, 0.44) and

Abstract Water pollution is gradually increasing in natural
waters through anthropogenic activities. This study aimed to
use fish scales as a bio-indicator of pollution, along with water
quality parameters, and the assessment and detection of selected
heavy metals in water samples collected from the River
Chenab, including the Chakbandi drain that gathers domestic
sewage waste and industrial effluents from Faisalabad and
deposits it into this freshwater body. All water quality parameters