Character divergence between treatment groups. Diet group differentiation for regressed morphometric data from LPJs. Regression was either against body weight or LPJ weight. Significance levels are given in Table 2. Boxes range from the lower to the upper quartile and a bar indicates the median. The whiskers exceed the boxes by 1.5 times the inter-quartile-range of the lower or upper quartile, respectively. Notches are a rough proxy for confidence intervals of the median; if they do not overlap between two plots, the medians are most likely significantly different. They extend to +/- 1.58 inter-quartile-range divided by the square root of the number of observations from the median.
Muschick et al. BMC Evolutionary Biology 2011 11:116 doi:10.1186/1471-2148-11-116