Table 3 Relationship between the MHC-DRB genotype of female odorant donors and the behavior that male recipients directed toward the female’s scent mark, with significant relationships indicated in bold. Explanatory variables with superscripts indicate the quadratic variable, whereas those without superscripts are linear

Proximity

MHC_{supertype diff}

−0.08

−1.5

0.13

No relationship between the male’s time in proximity and the female’s MHC dissimilarity

Sniff mark

MHC_donor

−0.55

−2.46

0.014

More time spent by males sniffing the marks of female donors with intermediate supertype diversity

MHC_donor²

0.10

2.13

0.033

Lick mark

MHC_donor

−4.24

−4.36

< 0.001

Longer time spent by males licking the marks of female donors with intermediate MHC diversity

MHC_donor²

0.82

4.01

< 0.001

Sniff dowel

MHC_{supertype diff}

0.17

1.16

0.250

Longer time spent by males sniffing the area adjacent to the marks of females when the supertype differences were intermediate between dyads

MHC_{supertype diff}²

−0.06

−1.96

0.050

Shoulder rub

MHC_{supertype diff}

−0.21

−2.1

0.035

Fewer shoulder rubs by males with increasing supertype differences between the recipient-donor dyad