Organophosphate insecticide spray poses potential threat of contamination of environmental components their accumulation in aquatic organisms. Although various physiological deficits associated with their exposure in fishes are documented, yet their retention in their edible muscle tissues has been poorly studied. In this context, the study was undertaken to ascertain the bioaccumulation of two organophosphate insecticide compounds (dimethoate and chlorpyrifos) in the muscles of juvenile Cyprinus carpio. The study could provide insight into the risks to human health associated with consuming contaminated fish flesh. The fishes exposed to various concentrations of dimethoate and chlorpyrifos in-vivo for 96 to ascertain the uptake and retention of these insecticides in the muscle. Results indicated that fish muscles accumulated the residues at all the concentrations with the recovery of 2.99% (0.032 ppm) of dimethoate exposed to LC₅₀ concentrations. In contrast, the chlorpyrifos residues were found Below the Detection Level (BDL) in the fishes exposed to LC₅₀ concentrations. The percentage bioaccumulation of dimethoate in fish muscle was 88.10%, and that of chlorpyrifos was BDL. The bio-concentration factor was dose-dependent and increased with increasing doses of both insecticides. The study invites attention to human health risk assessment in the regions where contaminated fish are consumed without scientific supervision.

IJPAB - 2017 Volume 5, issue 6

The Waskura lake is a small, rural freshwater body situated in the flood plains of river Jhelum. The lake water besides being used for recreation is also used for fishing activities. The present paper is an attempt to assess its present water quality status and to record the chemical enrichment of the lake water over a period of time. Chemical parameters like Dissolved Oxygen, Free CO₂, Total Alkalinity, Calcium Hardness showed significant variation (P<0.05) amongst different sites under study. The indicators of nutrient enrichment viz, Orthophosphate, Total Phosphorous, Ammonical Nitrogen and Nitrate Nitogen (pg/l) were recorded in concentrations of 38.5±3.6 pg/l, 379.0±36.9 pg/l, 135.3±11.8 pg/l and 309.0±39.5 pg/l respectively. Comparison of present values with previously available data indicates an increase in the concentrations of most of the limnological parameters which reflect the change in the trophic level of the lake.