The measurement of cholinesterase activities as a biomarker in chub (Leuciscus cephalus): the fish length should not be ignored

摘要

Biomarkers are early warning systems of the exposure of aquatic organisms to pollutants. Among them, the measurement of the cholinesterase (ChE) activities in fish muscle is a biomarker of the exposure to organophosphosphates and carbamates pesticides. As such it has been used in numerous field studies both in marine and continental waters. Cyprinids (chub, Leuciscus cephalus) were Sampled in river sites (France0 in relatively clean and polluted areas. We performed the statistical analysis of the ChE activities and We generally observed a statistical relationship between ChE activities and fish length, the larger fish having the lower ChE activ- Ities.