Table 3. Outcome of a GAM investigating the effect of time, age/sex class, presence of swollen parous female, party size (PS), proportion of time spent in the closed area and proportion of time spent travelling on chimpanzee call rate for the averaged best models.

Predictors	Parameter estimate
	Estimate	Std. E.	z value	Pr(>—z—)
Intercept	0.477	0.225	2.115	3.44e−02*
Age/sex class (male)
Subadult/adult female	−0.864	0.252	3.413	6.43e−04**
juvenile	−1.129	0.456	2.820	4.79e−03**
Closed area (forest)	−0.171	0.063	2.698	6.977e−03**
Swollen parous female presence	0.315	0.141	2.236	2.536e−01*
Party size	0.164	0.734	2.223	2.619e−02**
Travel	0.237	0.059	3.977	1.60e−04***

Notes.

Parameter estimates are reported for all terms in the averaged best three models.

^*p < 0.05.

^**p < 0.01.

^***p < 0.001.