This study provides valuable information about recovery capacity
of B-esterases and neurotoxic signals recovery capacity in the
non-target freshwater invertebrate C. gibbosa after exposure to an
organophosphate pesticide. After a recovery period of 21 days, ChE
activity could not reach control values but there was a signifi-
cant reduction of neurotoxic signs. Our work shows that C. gibbosa
ChEs were a very useful biomarker showing a strong sensitivity
and a slow recovery capacity increasing the possibility to indirectly
detect the presence of OP compounds for long periods. Neurotoxicity
signs were also very sensitive and, after an acute exposure, they
can be easily detected for about one week. C. gibbosa could provide
relevant information about effects of pesticides used in Argentina.