Figure 6. The sensitivity of juveniles released by adults exposed to different nTiO₂ products.

Sensitivity, displayed as percent relative to the 96 h-EC₅₀ of the respective control, of the fifth brood released by adult D. magna exposed to different nTiO₂ treatments using the products P25 or A-100. The data displayed for P25 represent the weighted mean values of the seven experiments (first and second set of experiments), each with four replicates per treatment, whereas the 96 h-EC₅₀ for the offspring released from the control parents was 3.13 mg/L nTiO₂. For the product A-100, the results of one experiment with four replicates of pre-treatment are displayed (fourth set of experiments). In this situation, the 96 h-EC₅₀ for the offspring released from the control parents was 1.98 mg/L nTiO₂. The error bars and dashed lines indicate the standard error. The dashed lines are related to the control. Asterisks (*) denote significant differences between a treatment and the respective control.