Table 3. Cohort life table for the Manu giant otter population, 1991 to 2006 cohorts (excluding 1997 and 1998).

x (Age)	Nx	mx	Sx	lx	lxmx	xlxmx	Ex
0.5	177	0.00	0.63	1.00	0.000	0.000	3.49
1.5	111	0.00	0.80	0.63	0.000	0.000	3.97
2.5	89	0.00	0.71	0.50	0.000	0.000	3.71
3.5	63	0.05	0.63	0.36	0.017	0.059	3.83
4.5	40	0.63	0.78	0.23	0.141	0.636	4.45
5.5	31	0.97	0.81	0.18	0.169	0.932	4.45
6.5	25	1.04	0.92	0.14	0.147	0.955	4.28
7.5	23	1.17	0.74	0.13	0.153	1.144	3.57
8.5	17	1.76	0.82	0.10	0.169	1.441	3.47
9.5	14	2.00	0.64	0.08	0.158	1.503	3.00
10.5	9	2.11	0.78	0.05	0.107	1.127	3.11
11.5	7	2.43	0.86	0.04	0.096	1.105	2.71
12.5	6	1.67	0.50	0.03	0.056	0.706	2.00
13.5	3	2.33	0.67	0.02	0.040	0.534	2.00
14.5	2	1.00	0.50	0.01	0.011	0.164	1.50
15.5	1	2.00	0.00	0.01	0.011	0.175	1.00
16.5	0	0.00	0.00	0.00	0.000	0.000	0.00

x(Age) = age interval (starting at 0.5 yrs which is when cubs are first censused), Nx = number of individuals per age class, mx = fecundity (half number of offspring born to parent aged x), Sx = age specific probability of survival to following year, lx = probability of survival from birth to age x, lxmx = average number of offspring born to female at age x (age specific contribution to reproduction), xlxmx = mother’s age when each offspring was born, Ex = life expectancy (average lifespan remaining for an individual of age x).