Table 1.
Comparisons of the probabilities (Prob.) of females reaching age milestones based on the annual probability of survival. ASR = annual survival rate; NR = northern resident killer whales; SR = southern resident killer whales.
| Age | Robeck et al. (2015) a | Olesiuk et al. (2005) b | Franks et al. (2016) | SR and NR Prob. c | Humans ( Arias 2014) |
|||||
|---|---|---|---|---|---|---|---|---|---|---|
| ASR | Prob. | ASR | Prob. | ASR | Prob. | ASR | Prob. | ASR | Prob. | |
| 60 | 0.783 | 1/37 | 0.938 | 1/4 | 0.9603 | 1/4 | 0.93 | 1/7 | 0.990 | 1/1.1 |
| 65 | 0.783 | 1/127 | 0.938 | 1/6 | 0.9603 | 1/5 | 0.93 | 1/10 | 0.985 | 1/1.2 |
| 70 | 0.783 | 1/431 | 0.938 | 1/8 | 0.9603 | 1/6 | 0.93 | 1/14 | 0.976 | 1/1.3 |
| 75 | 0.783 | 1/1,465 | 0.938 | 1/11 | 0.9603 | 1/8 | 0.93 | 1/20 | 0.962 | 1/1.5 |
| 80 | 0.783 | 1/5,000 | 0.938 | 1/15 | 0.9603 | 1/9 | 0.93 | 1/28 | 0.938 | 1/1.9 |
| 85 | 0.783 | 1/17,000 | 0.938 | 1/20 | 0.9603 | 1/11 | 0.93 | 1/41 | 0.893 | 1/2.7 |
| 90 | 0.783 | 1/57,000 | 0.938 | 1/28 | 0.9603 | 1/14 | 0.93 | 1/58 | 0.826 | 1/5.1 |
a Survival probabilities are from Matkin et al. (2013) for the southern Alaska resident killer whales.
b Olesiuk et al. (2005).
c Probabilities until age 60 from Kaplan–Meier survival analysis of combined known-age and estimated age northern and southern (NSR) resident females from 1 January 1975 to 1 January 2014 (NR) and 1 January 2015 (SR). Data after age 60 use a flat annual survival rate of 0.93 as proposed by Franks et al. (2016).