Table 1.

Statistical details for two different linear mixed-effect models on (a) Shannon parasite index (total parasite load) for all four Major histocompatibility complex (MHC) genotypes, (b) Shannon parasite index only for LL and RR genotypes and (c) the specialist Gyrodactylus sp. (number of infecting Gyrodactylus parasites) with only LL and RR MHC genotypes

	(a) All MHC genotypes Shannon			(b) LL vs. RR Shannon			(c) LL vs. RR Gyrodactylus sp.
	d.f.	F	P	d.f.	F	P	d.f.	F	P
Habitat of exposure	1,40	49.435	< 0.001	1,25	11.3443	0.0024	1,25	13.4608	0.0012
MHC origin	3,422	2.557	0.055	1,130	4.281	0.041	1,130	4.3286	0.0394
Habitat × MHC origin	3,607	9.521	< 0.001	1,133	1.4976	0.2232	1,133	1.4622	0.2287

Model parameter estimates are given in Supplementary Table S3a, b and c. Significant values (p < 0.05) are in bold.