Table 4.

Relative importance of age-specific mortalities and catastrophes on roan population viability. The parameters R² (coefficient of determination) and β (regression coefficient) and AIC are derived from generalized linear models (GLM).

Parameter	R 2	β	AIC
Adult mortality	78.3%	−4.096	71.89
Subadult mortality	3.7%	−0.810	138.84
Calf mortality	3.4%	−0.925	138.96
Fire	4.8%	−0.738	138.33
Drought	6.1%	−1.257	137.68