Table 3. Anova between isotopic data in hair and the categorical predictors.

Grey indicates significant differences in the mean isotopic values between groups of that variable (p-value<0.01). For those significant variables relation between groups and isotopic values are further tested through a t-test.

Variables	δ15Nhair		δ13Chair		δ34Shair
	F value	p-value	F-value	p-value	F-value	p-value
Province	0.7	0.4	6.8	0.009	39.2	1.5e-9
Sex	2.0	0.2	13.3	0.0003	4.1	0.04
Age	0.03	0.9	22.8	2.9e-6	0.1	0.7
Hair dye	2.3	0.1	9.5	0.002	1.3	0.3
Water type	2.8	0.1	1.5	0.2	1.3	0.3
Vegetarian	18.6	2.3e-6	8.5	0.004	0.6	0.4
Smoker	2.1	0.2	0.7	0.4	2.8	0.09