Christophe Barbraud and Henri Weimerskirch. 2005. Environmental conditions and breeding experience affect costs of reproduction in Blue Petrels. Ecology 86:682–692.

Appendix A. Results of a mixed-model ANOVA testing the effects of breeding state (breeder vs. nonbreeder), experience (inexperienced vs. experienced), year, and their interactions on body mass of Blue Petrels.

Effect	Numerator df	Denominator df	F	P
Breeding state	1	653	18.95	<0.0001
Experience	1	653	16.01	<0.0001
Year	9	653	6.38	<0.0001
Experience × Breeding state	1	653	0.17	0.707
Experience × Year	8	653	1.64	0.111
Year × Breeding state	9	653	2.78	0.003
Year × Experience × Breeding state	8	653	0.89	0.524