Behavioural plasticity in the early breeding season of pelagic seabirds - a case study of thin-billed prions from two oceans

Table 4 Effects of colony and sex on timing and duration of the first incubation trip of Thin-billed prions Pachyptila belcheri from the Falkland/Malvinas Islands and Kerguelen

Dependent	Independents	F	P	Effect size
Period in the burrow after pre-laying exodus	Colony	3.28	0.079	0.086
Period in the burrow after pre-laying exodus	Sex	60.79	< 0.001	0.635
Departure date	Colony	1.16	0.288	0.032
Departure date	Sex	10.54	0.003	0.231
Trip duration (days)	Colony	14.7	< 0.001	0.296
Trip duration (days)	Sex	0.58	0.452	0.016
Cumulative travel distance (km)	Colony	32.12	< 0.001	0.479
Cumulative travel distance (km)	Sex	0.07	0.794	0.002
Maximum distance from colony (km)	Colony	9.35	0.005	0.238
Maximum distance from colony (km)	Sex	0.03	0.869	0.001
Travel speed (km/day)	Colony	12.23	0.001	0.259
Travel speed (km/day)	Sex	1.9	0.178	0.051

Significant p-values are marked bold. As a measure of effect sizes we report partial Eta-Square values (η²). None of the interactions were significant (N = 50 birds)

ISSN: 2051-3933