Table 3:

Results of the linear mixed models examining the influence of forest type (fragment or ‘control sites’) and level of human impact on log-transformed faecal glucocorticoid metabolite levels in Ateles hybridus

	d.f.	χ2	P value
Null vs. full model	9	72.52	<0.001*
Variable	Estimate ± SEM	t	PMCMC
Intercept	6.33 ± 0.32	19.58	0.0001*
Forest type	−0.20 ± 0.39	−0531	0.5708
Impact: both–none	−1.06 ± 0.34	−3.05	0.0168*
Impact: both–one	1.04 ± 0.57	1.81	0.0868
Impact: one–none	−1.06 ± 0.34	−3.05	0.0172*
Group size	0.10 ± 0.03	2.61	0.3718
Time	−0.23 ± 0.03	−6.30	0.0001*
Sex	−0.01 ± 0.10	−0.15	0.9004
Age	−0.36 ± 0.12	−2.95	0.0030*

Overall effect	d.f.	χ2	P value
Female reproductive state	3	8.38	0.0386*
Forest type	1	0.27	0.6033*
Human impact	2	16.21	0.0003*

*Variables that significantly influenced faecal glucocorticoid metabolite levels.