Figure 3
Cumulative apposition areas of bone tissue in six different limb bones during early life (scaled values of bone apposition area in mm2, plotted against age in days), of calves nursed by their mothers (C1: ID-23, ID-24), and hand-raised calves (C2: ID-1, ID-2, ID-3, ID-4). The cross indicates a breakpoint estimated by segmented regression, the horizontal bar above the x-axis indicates the 95% confidence interval of breakpoint location in which the weaning event (occurred at the age of 90 days) is included. Slopes of regression below and above the breakpoint differed significantly (F(1,57) = 6.25, p = 0.015; linear mixed modelling without a breakpoint yielded a significantly worse fit (model without breakpoints AIC = 32.14; model with breakpoints AIC = 11.22; ∆AICc = 19.92, p < 0.0001).
