Table 2 Measures of viability of the SRKW population over 100 years under scenarios of minimal anthropogenic threats, current threats, and two levels of increased threats due to development.
From: Evaluating anthropogenic threats to endangered killer whales to inform effective recovery plans
| Â | Threats modelled | Population projection | ||||||
|---|---|---|---|---|---|---|---|---|
Scenario | Chinook trend | Noise | PCB (ppm/y) | Oil spill (big; small) | Ship strikes | Population growth (r) | Probability extinct | Probability final N < 30 |
No anthropogenic threats | constant | 0 | 0 | 0 | 0 | 0.019 | 0 | 0 |
Current threats | constant | 85% | 2 | 0 | 0 | −0.001 | 0 | 5% |
Low increase | −25% in 100 y | 92.5% | 2 | 0.21%; 1.08% | 1 per 10 y | −0.008 | 5% | 31% |
Higher increase | −50% in 100 y | 100% | 2 | 0.42%; 2.16% | 2 per 10 y | −0.017 | 25% | 70% |
