Diplodon chilensis 8 enzyme activity 8 Coliform bacteria 6 Oxidative stress 6 Sewage pollution 6 mollusc 6 morphometry 6 pollution effect 6 sewage 6 Antioxidant defenses 4 Argentina 4 Bacteria (microorganisms) 4 Bivalvia 4 Escherichia coli 4 antioxidant 4 coliform bacterium 4 freshwater environment 4 growth 4 laboratory method 4 metabolism 4 oxidation 4 pollution exposure 4 Allochthonous organic matter 2 Animals 2 Anthropogenic impact 2 Biological Markers 2 Biomarkers 2 Catalase 2 Environmental Monitoring 2 Fecal coliforms 2