Figure 2. Reproduction on algae with and without EAA addition – exp. 1.

Cumulative production of subitaneous eggs (A) and ephippia (resting eggs, B) by 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; egg numbers are means of n = 3 ± SD; identical lowercase letters indicate no significant difference after Tukey's post-hoc HSD test following one-way ANOVA for the subitaneous eggs and Mann-Whitney U-tests following Kruskal-Wallis ANOVA for the resting eggs.