Model selection on the competitive metrics hypothesized to influence the rate of body mass senescence. The grey area denotes the models included in the top model set. The first three columns represent terms fitted in addition to the base model (see below), where: *, interactions between terms; +, additive terms; d.f., degrees of freedom; AW, adjust weight after removal of more complex models with less support; EA, early adulthood; LSR, local sex ratio; JP density, local population density during the juvenile period (0–365 days old). The base model was defined as: body mass ∼ month + ALC + SGS + LYC + age*sex + age2 + (1|ID) + (1|year) + (1|social group); the top model from table 1.