Figure 5From: Evolution of sociality by natural selection on variances in reproductive fitness: evidence from a social beeBoxplots of per capita brood number for early spring samples (blue bars) and early summer samples (red bars). Colonies with four or more females were pooled because of low sample sizes. Extremes are indicated by â—† and outliers are indicated by â—‹ The line shows the median, and boxes and the whiskers represent interquartile ranges. Sample sizes are indicated directly below the abscissa.Back to article page