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Model predictions for frequency-dependent ELA-DRA effects on (a) GI parasitism, in terms of EPG of faeces, and (b) ectoparasitism, in terms of number of ticks. Effects of rare (less than 5%) mid-frequency (10–15%) and common alleles (more than 20%) on parasite burden are shown. Factors are defined as the presence (grey) or absence (white) of an allele in an individual's genotype by season (dry and wet). Ninety-five per cent confidence intervals are indicated by the dashed lines.
