Lethality and acetylcholinesterase inhibition in a native invertebrate species exposed to water samples of an impacted stream (Reconquista River Basin, Argentina)

BIANCO, KARINA ALESIA; BERNAL-REY, DAISSY L.; MENENDEZ-HELMAN RENATA J.; KRISTOFF, GISELA

BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY

SPRINGER

Lugar: Berlin; Año: 2023

0007-4861

AbstractThe study of multiple biomarkers in bioindicator species is a useful tool to evaluate water quality inaddition to physicochemical analysis. The aim of this work was to study the toxicity of water samples from two sites with different anthropogenic impacts (R: near a residential area and FP: close to horticultural farms and industrial waste treatment plants) from Las Catonas sub-basin (Reconquista River basin) in the native gastropod Biomphalaria straminea in laboratory conditions. Some physicochemical parameters and chlorpyrifos concentration were measured in the water samples. Snails were exposed for 48 h to the water samples and neurotoxicity signs, behavior, lethality and acetylcholinesterase, carboxylesterase, glutathione S-transferase, glutathione reductase and catalase activities were measured. In water from FP site, the anticholinesterase insecticide chlorpyrifos was detected and conductivity and pH were higher than in R. Lethality (60%) and a decrease (30%) in acetylcholinesterase activity were observed in snails exposed to FP indicating that water contamination causes high toxicity in B. straminea.