. 2014 Feb;10(2):20140043. doi: 10.1098/rsbl.2014.0043

Table 2.

Linear selection differentials calculated via the number of lambs produced, weaned and recruited, on horn length and body mass of bighorn rams at Ram Mountain, Canada, 1988–1992 and 1996–2011. Different superscripts indicate significant differences between selection differentials.

traits	fitness proxy	linear selection differential ± s.e.	t	p
horn length	production	0.934 ± 0.006^a	9.675	<0.001
horn length	weaning	0.939 ± 0.007^a	9.403	<0.001
horn length	recruitment	1.065 ± 0.009^b	7.004	<0.001
body mass	production	0.853 ± 0.007^c	9.764	<0.001
body mass	weaning	0.844 ± 0.008^c	9.352	<0.001
body mass	recruitment	0.885 ± 0.010^d	7.188	<0.001