Life expectancy at hatching (e₀), net reproduction rate (R₀), generation time (T), intrinsic rate of population increase (r_m) and proportion of sexual offspring (PS) of B. calyciflorus exposed to different concentrations of OTC and cultured at 1.0 × 10⁶ (white bars), 2.0 × 10⁶ (grey bars) and 4.0 × 10⁶ (black bars) cells mL⁻¹ of Scenedesmus obliquus (mean ± standard error). ^*Significant (P < 0.05) or ^**highly significant (P < 0.01) difference from the control at the same algal density.