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

Table 3 Effects of colony and sex on timing and duration of the pre-laying exodus in Thin-billed prions Pachyptila belcheri from the Falkland/Malvinas Islands and Kerguelen

Dependent	Independents	F	P	Effect size
Departure date	Colony	2.69	0.107	0.054
Departure date	Sex	28.72	< 0.001	0.379
Trip duration (days)	Colony	4.7	0.035	0.091
Trip duration (days)	Sex	34.4	< 0.001	0.422
Return date	Colony	0.78	0.381	0.016
Return date	Sex	1.53	0.223	0.031
Cumulative travel distance (km)	Colony	30.40	< 0.001	0.393
Cumulative travel distance (km)	Sex	12.51	< 0.001	0.210
Maximum distance from colony (km)	Colony	19.30	< 0.001	0.271
Maximum distance from colony (km)	Sex	0.18	0.671	0.003
Travel speed (km/day)	Colony	21.95	< 0.001	0.318
Travel speed (km/day)	Sex	0.17	0.682	0.004

Significant p-values (P > 0.05) 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