Table 2.

Parameter estimates from the generalized linear model considering survival of the calves (less than 8 years of age) as a function of the age of the mother, the family group migration pattern, the sex of the calf and the age of the calf (in years).

parameters	estimates	s.e.	z-value	p-value
intercept	−3.42	2.18	−1.57	0.12
age of the mother	0.22	0.10	2.23	0.03
migration	1.88	0.82	2.31	0.02
males	−2.22	1.16	−1.91	0.06
calf age	−0.30	0.28	−1.09	0.27
males×calf age	1.02	0.50	2.03	0.04