60-
 0 Unfertilized
 50- M Fertilized
 E


 0
 "i 40- o


 c 30- -



 d o
 10- o



 I I
 1 5
 Plant age (years)

Figure 3-2. The number of worker ants present in focal domatia varied with plant age but
 fertilization treatment had no effect. Boxplots show inter-quartile ranges and
 expected minimum and maximum values, with values beyond the 95% CI
 indicated by open circles. All of the high outliers in the 1-yr-old plants were
 domatia occupied by Crematogaster carinata.