Table 2.

Outcome of mixed effects models of trip duration, nest bout duration and nest attendance (proportion of time that at least one of the parents is present the nest)

		F	d.f	p-value
Trip duration
Preceding trip duration partner * sex		0.1568	1	0.68
Preceding trip duration partner		0.9132	1	0.385
Sex		0.4539	1	0.521
Nest bout duration
Offspring age * sex		0.2001	1	0.781
Offspring age		43.217	1	0.009
Sex		14.5944	1	0.159

		χ2	d.f	p-value
Nest attendance
Offspring age		75.47	1	< 0.001

For trip duration and nest bout duration, a gamma distribution with log transformation was used, while for nest attendance, a beta regression with logit link function was used. The table presents the outcome of the full models. All models included bird ID and colony ID as random effects