Repeated-measures LMM analysis of relative telomere length at day 7 or 16 after hatching in relation to sex and brood size.

Brood and nestling identity were included as a random effects. Two separate models both including sex and age, and also brood size or sibling sex ratio, respectively (see Statistical analyses) did not disclose significant interaction effects. The effect of age was significant also after excluding the effect of sibling sex ratio. The analysis is based on 119 relative TL estimates from 60 nestlings, because the datum for one nestling at age 7 was missing.Repeated-measures LMM analysis of relative telomere length at day 7 or 16 after hatching in relation to sex and brood size.