Mean and variance estimates, and the proportion of variance explained for anti-T. circumcincta IgA, IgE and IgG levels measured in St. Kilda Soay sheep lambs and adults.

Mean and VOBS are the mean and variance of the raw data measures, N is the number of measures in NIDS unique individuals. VP is the phenotypic variance as a sum of all variance components as estimated by an animal model. The additive genetic effect (h2) indicates the narrow sense heritability of the trait. Non-significant estimates are indicated in grey text. Full results of all variance components are provided in S3 Table. Figures in parentheses are standard errors. Effects are plotted in Fig 2.