The use of pesticides and fertilizers has increased rapidly in Pakistan. Pesticide use in Pakistan increased seven-fold in quantity between 1981 and 1992, from 915 million tons to 6,865 million tons of which 80% were organophosphate. Several studies have reported the toxicological issues and adverse effects of pesticides in aquatic biodiversity. The present study included the effects of cypermethrin on cholinesterase activity and protein content against Rana tigrina. After preliminary experiments of the under test compound, two different doses were selected for the studies. It was observed...