Table 3.

Gompertz estimates of male mortality and life-span summary statistics. Adult age interval is the mean age class of likely first reproduction. IMR (= Gompertz a) is the instantaneous mortality at adulthood (with its 95%CI); RoA (= Gompertz b) is the rate of aging estimated with Gompertz acceleration (with its 95% CI); MRDT is the mortality rate doubling time during adulthood; Oldest age reached is the age class of the oldest observed individual; Median age is the 50% survival age with its range.

Species	Adult age interval (years)	IMR (/year)	95% CI	RoA	95% CI	MRDT (no. of years)	Oldest age reached (years)		Median age	[Range]
							Estimated	Known*
† Sifaka	5–6	0.0201	[0.0140 0.0290]	0.186	[0.155, 0.222]	3.73	26–27	19–20	12	[12, 13]
Muriqui	6–7	0.00187	[0.00044, 0.00784]	0.148	[0.0820, 0.266]	4.70	33–34	26–27	24	[22, 27]
Capuchin†‡	6–7	0.010	[0.0027, 0.036]	0.294	[0.159, 0.542]	2.36	24–25¶	12–13	4	[3, 5]
Baboon†‡	7–8	0.0371	[0.0266, 0.0517]	0.213	[0.177, 0.256]	3.26	24–25	22–23	10	[9, 11]
Blue monkey	8–9	No est.		No est.			19–20	19–20	No est.
Chimpanzee	14–15	0.00787	[0.00346, 0.0179]	0.137	[0.0980, 0.190]	5.07	43–44	40–41	11	[9, 14]
Gorilla	15–16	0.00594	[0.00139, 0.0254]	0.182	[0.106, 0.313]	3.81	38–39	34–35	23	[22, 29]
Human||		0.00024	[0.00023, 0.00025]	0.086	[0.0854, 0.0863]	8.07	100+	100+	79.5

^*Oldest individual with known date of birth.

^†Distribution of deaths imputed from onset of adulthood with age structure. See methods in the Supporting Online Material (SOM).

^‡Age structure corrected for population growth. See methods in the SOM.

^¶Truncated at 18–19 for mortality analysis because of relatively smaller samples sizes of deaths and transitions in later age classes.

^||Data from (16), modeled beginning at age interval 15–16 years through 99–100 years.