Table 1.

Number of observations (n), trait means (± SD), coefficients of variation (CV) and range

Trait	n	Mean	CV	Range
Birth mass (g)	10986	1.89 ± 0.22	0.11	0.84-3.28
Head width (mm)	10971	8.22 ± 0.38	0.05	5.78-10.56
Litter size	2665	4.48 ± 1.53	0.34	1-9