Fig. 4

Means and residual standard deviations and coefficients of variation among dam age classes for birth and weaning weights. Means and standard deviations (SD) are expressed as percentage deviations from the reference class (3- to 6-year-old dams). Coefficients of variation (CV) are expressed as absolute deviations from the reference class. *, **, *** indicate that residual variances or CV differ from those observed for 4- to 6-year-old dams at P < 0.05, 0.01, and 0.001, respectively, by F-test with Bonferroni adjustment for multiple comparisons