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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

From: Genetic variation at MHC class II loci influences both olfactory signals and scent discrimination in ring-tailed lemurs

Behavior Best-fit explanatory variable slope Z value P value Effect
Proximity MHCsupertype diff −0.08 −1.5 0.13 No relationship between the male’s time in proximity and the female’s MHC dissimilarity
Sniff mark MHCdonor −0.55 −2.46 0.014 More time spent by males sniffing the marks of female donors with intermediate supertype diversity
MHCdonor2 0.10 2.13 0.033
Lick mark MHCdonor −4.24 −4.36 < 0.001 Longer time spent by males licking the marks of female donors with intermediate MHC diversity
MHCdonor2 0.82 4.01 < 0.001
Sniff dowel MHCsupertype 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
MHCsupertype diff2 −0.06 −1.96 0.050
Shoulder rub MHCsupertype diff −0.21 −2.1 0.035 Fewer shoulder rubs by males with increasing supertype differences between the recipient-donor dyad