Table 2.

Deterministic and median stochastic growth rates of rock and white-tailed ptarmigan based on matrix model projections

		Rock ptarmigan		White-tailed ptarmigan
Juvenile survival	Correlation	Deterministic lambda	Stochastic lambda (sd)	Deterministic lambda	Stochastic lambda (sd)
0.22	0.5		0.917 (0.046)		0.818 (0.056)
0.22	0	0.944	0.923 (0.039)	0.864	0.826 (0.053)
0.22	−0.5		0.928 (0.033)		0.836 (0.045)
0.27	0.5		0.985 (0.048)		0.902 (0.063)
0.27	0	1.013	0.993 (0.042)	0.957	0.910 (0.056)
0.27	−0.5		0.999 (0.033)		0.923 (0.050)
0.32	0.5		1.052 (0.048)		0.997 (0.065)
0.32	0	1.082	1.062 (0.044)	1.048	1.000 (0.061)
0.32	−0.5		1.065 (0.038)		1.008 (0.057)

Models were run with three values for mean juvenile survival and three levels of within year correlation between mean juvenile and mean second-year/after-second year survival. Within year fertility and annual survival rates of yearlings and adults were assigned a correlation of 0.9. All other pairwise comparisons were assumed to have no correlation. Standard deviation for stochastic lambda estimates refer to the variation among 25-year projections.