Figure 1. Growth on algae with and without EAA addition.

Somatic growth rates (mean of n = 3 ± SD) of D. pulex fed Chlamydomonas or Cryptomonas, both either without additional EAA or with the addition of dissolved arginine and histidine or lysine and threonine at concentrations of 25 µmol L⁻¹; identical lowercase letters indicate no significant difference after Tukey's post-hoc HSD test following one-way ANOVA.