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Average ± SEM fecundity (number of offspring/years) for males and females across 4 age categories: young (N = 84 males and 131 females), prime (N = 59 males and 114 females), postprime (N = 38 males and 98 females), and senescent (N = 30 males and 75 females)
| Young (5–8 years old) | Prime (9–12 years old) | Postprime (13–16 years old) | Senescent (17–20 years old) | |
|---|---|---|---|---|
| Males | 1.09±0.13 | 1.31±0.17 | 0.68±0.13 | 0.15±0.05 |
| Females | 0.64±0.02 | 0.65±0.02 | 0.64±0.03 | 0.55±0.04 |
