Table 1.

Proportions of early females staying on the nest throughout the worker phase as a function of foundress presence and initial foundress number (n = 45; 1993 and 1994 colonies combined)

Foundress status	Proportion of early females staying on nest
	Single-foundress	Multiple-foundress
Absent	0.098	0.109
Present	0.112	0.259*

^*Three-factor ANOVA (site, foundress presence, foundress number) revealed a significant positive effect of foundress presence (F test = 7.70; P = 0.0086) and a significant positive effect of foundress number (F test = 7.66; P = 0.0088).