Azinphos-methyl causes in Planorbarius corneus toxic effects on reproduction, offspring survival and B-esterases depending on the exposure time

摘要: Abstract This work aimed to study in the freshwater gastropod Planorbarius corneus effects of acute (2 days) and subchronic (14 days) exposures an environmental concentration organophosphate azinphos-methyl on different reproductive parameters, offspring survival B-esterase activities gonads whole organism soft tissue. The exposure inhibited only carboxylesterase activity both tissues while also cholinesterase activity, decreased number hatched-eggs increased lethality (92%). On other hand, B-esterases were more effective biomarkers than due their inhibition appeared earlier time (cholinesterase activity) remained for a longer (carboxylesterase when recovery studies performed. We concluded that parameters can be used as effect aquatic contamination with azinphos-methyl. Our showed 14 days produced severe signs toxicity adult organisms, egg masses juveniles could cause negative at population level contaminated environments.