The effect of presence of a queen on workload (sweeping, n = 4902; digging, n = 5970) by other caste individuals in experiment 1.

<p>RM: reproductive males. W: workers. The identity of colony (n = 3) and individual (n = 28) were determined at random. (See <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0044584#pone-0044584-t001" target="_blank">Table 1</a> for the number of trials in each colony.).