Using growth measures in the freshwater shrimp Caridina nilotica as biomarkers of Roundup® pollution of South African freshwater systems

► Caridina nilotica was exposed to sub-lethal concentrations of Roundup®. ► Growth measures were evaluated as biomarkers of Roundup® toxicity. ► Growth indices and moulting rate increased in concentration-dependent manner. ► All the tested growth measures could be used as biomarkers of Roundup® toxicity. ► Moulting rate indicates clearer sub-lethal effects of Roundup® toxicity.