Figure 2.

Reduced B. floridanus levels affect C. floridanus’ development by decreasing body size and relative worker polymorphism within colonies. (A) Head widths of minor worker ants receiving antibiotic (orange dots) or ordinary diet (blue dots) during (immature-treated) or after (adult-treated) development from egg to adult. Overlaying boxes indicate the mean ± SE; letters specify significant post hoc groups (α = 0.05). (B) Proportion of major-to-minor workers and colony size after seven months on the antibiotic (orange dots) or ordinary diet (blue dots).