Table 2.

Frequency and intensity of stochastic catastrophe regimes yielding ZPG

		Mortality scalar
Child (Zqc)		1				2				3				4				5
Adult (Zqa)		1	5	10	20	1	5	10	20	1	5	10	20	1	5	10	20	1	5	10	20
Population		Critical catastrophe interval T, y
Ache	H	*	*	3	5	*	2	3	6	*	2	4	6	2	3	4	7	2	3	5	7
Agta	H	*	7	16	33	7	14	23	40	11	18	27	45	13	20	29	47	15	22	31	49
Hadza	H	*	2	4	7	2	3	5	9	3	5	7	10	5	6	8	12	6	8	9	13
Hiwi	H	*	11	25	52	6	17	31	58	12	23	36	64	17	28	42	70	21	32	46	73
Ju/’hoansi	H	*	13	29	61	12	25	41	73	24	37	53	85	37	50	66	98	49	62	78	110
HG Mean	*	*	3	7	14	2	5	9	16	4	7	10	18	6	9	12	20	7	10	14	21
Aborigine	A	*	*	*	2	*	*	2	3	2	2	2	3	2	3	3	4	3	3	4	5
Gainj	F	*	9	20	43	6	15	27	49	12	21	33	55	18	28	39	62	25	34	45	68
Tsimane	F	*	*	*	2	*	*	2	3	*	*	2	3	*	2	2	3	2	2	2	4
Yanomamo	F	*	*	*	2	*	*	2	3	*	2	2	3	2	2	3	4	2	3	3	5
Herero	P	*	2	4	9	3	4	7	11	5	7	9	14	7	9	12	16	10	12	14	19
Human mean	*	*	2	4	8	1	3	5	9	2	4	6	10	3	5	7	11	4	6	8	12

Cell values are critical time intervals (T, years) between catastrophes for growing populations that would achieve long-term ZPG under shocks of different intensity on child mortality (Z^q_c, top row header) and on adult mortality (Z^q_a, second row header). Asterisks indicate cases where shocks would have to occur annually.