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.

Wilson and Martin

Wilson and Martin BMC Ecology 2012 12:9   doi:10.1186/1472-6785-12-9

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