What does the freshwater clam, Corbicula largillierti, have to tell us about chlorothalonil effects?

Chlorothalonil (CLT) is a broad spectrum, and non-systemic fungicide applied in foliar structures to prevent treat pathogens. This compound reaches aquatic environments affects the biota. In this context, main goal of study was assess effects CLT at biochemical, tissular, individual levels biological organization using invasive bivalve Corbicula largillierti as bioindicator species. Clams were exposed different sublethal concentrations (0, 10, 20 50 µg. L?1 CLT) for 96 h. At biochemical level, enzymatic activity (Glutathione-s-Transferase, Catalase, Acetyl-, Butiryl- Carboxyl-esterases) lipid peroxidation measured gills visceral mass. Also, digestive gland morphometry through quantitative histological indexes registered tissular level. Finally, filtering burial behavior level measured. highest concentration, most significant changes observed (except butyrylcholinesterase), morphometry. It also increases latency time burial. Most biomarkers assessed showed responses under exposure. Therefore, taking into account that C. affected by CLT, it can be expected other species could potential risk if present freshwater systems.