Table 1. Parameters and values used in the PVA for the basic model.

Category Parameter Value (SD)
Scenario settings
No. of iterations

500
No. of years 100
Extinction definition 1 sex remains
Species description Inbreeding depression none
Environmental concordance in survival and reproduction 1
Reproduction system Mating system polygyny
Age at first breeding for F 2 yr
Age at first breeding for M 2 yr
Maximum reproductive age 15
Max. no. progeny per year 1
% M at birth 50
Reproduction rates % adult females breeding (EV) 100 (10)
% adult females with litter size of 1 70
Mate monopolization % males in breeding pool 100
Mortality rates (%) Females – age 0 to 1 (SD) 20 (3)
Females – age 1 to 2 (SD) 25 (3)
Females – age >2 (SD) 25 (3)
Males – age 0 to 1 (SD) 20 (3)
Males – age 1 to 2 (SD) 25 (3)
Males – age >2 (SD) 25 (3)
Dispersal Age range 1–2 yr
Dispersing sex both
% survival of dispersers 70
Annual dispersal prob. among populations 0.5%
Initial population size Stable age distribution
Carrying capacity Defined by initial population size (5)