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.AICc即校正赤池信息准则（corrected Akaike's Information Criterion），ΔAICc_i为模型i与最优模型间的AICc差值，wAICc_i为赤池权重（Akaike weight）。ΔAICc_i ≤2的合理模型已列出；完整候选模型集详见附表S2至S14。交互项以符号×表示，且包含所有低阶加性项。固定效应按表格中出现的先后顺序依次为：yr代表年份，none为仅含截距的模型，trt为处理组（饲喂组或对照组），HD为标准化出雏日期，maleage为雄性年龄（幼龄为1龄个体，老龄为2龄及以上个体），chickage为雏鸟日龄，found为巢发现日期的标准化值。本模型集针对不同繁殖参数进行拟合。