Model selection to assess the effects of age, mate replacements and diet on the productivity of breeding successful pairs.

Model definition enumerates the fixed effects considered in the GLMMs. All models included territory and year nested by population as random effects.*Best model AICc = 174.899.Note: OC = rabbit consumption; AR = partridge consumption; H′ = diet diversity; PSi = prey consumption specificity. Parameters’ interactions are denoted by (*), while (2) indicates a quadratic effect. ΔAICc refers to the difference in the corrected Akaike Information Criteria (AICc) between model i and the model with the lowest (AICc) (i.e. the best model). Models with ΔAICc cw) explains the probability that a given candidate model is the best of the proposed set, so the sum of all the models is 1.0. R2GLMM(m) estimates model fit using fixed effects only, while R2GLMM(c) estimates model fit including both fixed and random effects.