Table 5.

Analysis results for number of sires per litter, female reproductive success, male reproductive success, and female size in Thamnophis elegans populations

Source of variation	Number of sires per litter (>58% sampled; N = 56)	Female reproductive success	Male reproductive success	Female size (SVL)
Ecotype
Test statistic	${\mathrm{\chi }}_1^2$ = 0.024	F 1,49 = 3.31	F 1,62 = 3.53	F 1,50 = 94.26
P-value	0.88	0.075	0.065	<0.0001***
Litter size sampled
Test statistic	${\mathrm{\chi }}_1^2$ = 1.76	—	—	—
P-value	0.19	—	—	—
Population (ecotype)
Test statistic	${\mathrm{\chi }}_1^2$ = 3.63	F 4,49 = 4.90	F 4,62 = 1.91	F 4,50 = 0.87
P-value	0.46	0.0021**	0.12	0.49
Body size
Test statistic	${\mathrm{\chi }}_1^2$ = 0.0038	F 1,49 = 6.66	—	—
P-value	0.95	0.013*	—	—

“—” indicates effect not included in model (see text for details). Asterisk denote significant factors (*P < 0.05, **P < 0.01, ***P < 0.001).