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Factors influencing period length τ. (Results from linear mixed-model analysis of τ of locomotor activity in wild-derived great tits (n = 98), all factors and covariates modelled as fixed effects; results on lay date are based on the subset of 86 laying birds.)
| variable | Wald statistic | p-value |
|---|---|---|
| brood | Wald19= 77.1 | <0.001 |
| extra-pair paternity | Wald1 = 11.6 | <0.001 |
| chronotype (COG) | Wald1 = 2.0 | 0.159 |
| sex | Wald1 = 1.7 | 0.197 |
| lay date | Wald1 = 0.1 | 0.772 |
