The ECOTOX measurements involved the inhibitory effects of
the detergent on motility parameters (motility and velocity), orientation
parameters (upward swimming and r-value) and morphology
(cell shape/cell compactness) in parallel. Immediately after
exposure to the detergent (0 h), motility was significantly decreased
at concentrations above 90 mg L1 with an EC50 value of
181 mg L1 (Fig. 1 a).