Figure 2.

Box plots of the mean fluorescence intensity of mussel feces following dosing with PS beads containing a red dye. Mussels were dosed with a) 200 nm beads at 1 × 10⁻¹² m and allowed to clear for 21 d; b) 1000 nm beads at 1 × 10⁻¹² m and allowed to clear for 44 d; and c) 2000 nm beads at 0.01 × 10⁻¹² m and allowed to clear for 20 d. The boxes labeled “c” are the control.