Table 2.
Demographic parameters of roans used by different PVA scenarios in comparison with the baseline model. All other parameters are the same as those listed in Table 1. The scenarios/management options are (1) reducing adult mortality; (2) reducing calf mortality; (3) reducing subadult mortality; (4) reducing effects of fire; (5) reducing effects of drought; (6) combined interventions; (7) restocking with current scenario; (8) protected sanctuary together with restocking. The values in bold are those different from the baseline model.
| Demographic Parameter | Baseline model | Scenario 1 | Scenario 2 | Scenario 3 | Scenario 4 | Scenario 5 | Scenario 6 | Scenario 7 | Scenario 8 |
|---|---|---|---|---|---|---|---|---|---|
| Mortality | |||||||||
| Calves | 11% | 11% | 5% | 11% | 11% | 11% | 5% | 11% | 5% |
| Subadult | 8% | 8% | 8% | 5% | 8% | 8% | 5% | 8% | 5% |
| Adult | 21% | 10% | 21% | 21% | 21% | 21% | 10% | 21% | 10% |
| Number of breeding | 4, 6, | 3, 4, 6, | |||||||
| groups @ 12 roans | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 8 & 10 | 8 & 10 |
| Carrying capacity (mean ± SE) | 288 ± 20 | 288 ± 20 | 288 ± 20 | 288 ± 20 | 288 ± 20 | 288 ± 20 | 288 ± 20 | 288 ± 20 | 640 |
| Multiplicative impacts of catastrophes | |||||||||
| (i) Drought | |||||||||
| (a) Frequency | 20% | 20% | 20% | 20% | 20% | 20% | 20% | 20% | 20% |
| (b) Reproduction | 10% | 10% | 10% | 10% | 10% | 5% | 5% | 10% | 5% |
| (c) Survival | 15% | 15% | 15% | 15% | 15% | 5% | 5% | 15% | 5% |
| (ii) Fire | |||||||||
| (a) Frequency | 20% | 20% | 20% | 20% | 10% | 20% | 10% | 20% | 10% |
| (b) Reproduction | 5% | 5% | 5% | 5% | 2% | 5% | 2% | 5% | 2% |
| (c) Survival | 5% | 5% | 5% | 5% | 2% | 5% | 2% | 5% | 2% |
| (iii) Floods | |||||||||
| (a) Frequency | 10% | 10% | 10% | 10% | 10% | 10% | 5% | 10% | 5% |
| (b) Reproduction | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% |
| (c) Survival | 15% | 15% | 15% | 15% | 15% | 15% | 10% | 15% | 10% |