Table 1 Effects of local male density, local female density, and standardized OSR at spring emergence on female reproduction in GLMM.

Female identity was fitted as a random effect in all models. B and SE correspond to model-averaged parameter estimates and SEs in GLMM, whereas χ2 corresponds to likelihood ratio test. All interactions between predictors were insignificant (P > 0.1).

PredictorsParameters of female reproduction
Breeding success (breeder/nonbreeder), n = 98Litter size, n = 65
Local male density (PC1)B = 0.81, SE = 0.28, χ2 = 8.6, P = 0.003B = 0.20, SE = 0.23, χ2 = 0.8, P = 0.4
Local female density (PC2)B = −0.01, SE = 0.33, χ2 = 0.0, P = 1.0B = −0.20, SE = 0.26, χ2 = 0.6, P = 0.4
OSR (female/male)B = −0.82, SE = 0.28, χ2 = 10.1, P = 0.0015B = −0.24, SE = 0.23, χ2 = 1.1, P = 0.3
Female ageB = −0.65, SE = 0.55, χ2 = 1.4, P = 0.2B = 0.39, SE = 0.47, χ2 = 0.7, P = 0.4