Models fitted to different reproductive parameters.

AICc is the corrected Akaike's Information Criterion, ΔAICci is the difference in AICc between model i and the best model and wAICci is the Akaike weight. Plausible models (ΔAICci ≤2) are presented; see Tables S2–S14 for the full sets of candidate models. Interactions are indicated by × and include all lower order additive terms as well.Fixed effects (in order of appearance in table). yr = year, none = intercept-only model, trt = treatment (fed or control), HD = standardized hatching date, maleage = male age (young (yearling) or old (2+)), chickage = age of chicks, found = standardized date nest found.Models fitted to different reproductive parameters.