Foraging behavior links climate variability and reproduction in North Pacific albatrosses

Table 3 Loadings and variance explained for PC axes used in analyses of reproductive success and trip metrics

Variable	MEI	NPGO	Distance to TZCF	SST^a	Cumulative Prop. Var.
Reproductive success analyses (1981–2012)
Laysan albatross
PC1_{LAAL, annual}	0.43	−0.52	−0.52	−0.52	0.71
PC2 _{LAAL, annual}	0.79	−0.16	0.50	0.32	0.88
Black-footed albatross
PC1 _{BFAL, annual}	0.44	−0.53	−0.51	−0.52	0.69
PC2 _{BFAL, annual}	0.79	−0.11	0.53	0.27	0.85
Trip level analyses (2002–2012)
Laysan albatross- Incubating trips
PC1 _{LAAL, incubating}	0.61	0.26	−0.52	−0.54	0.53
PC2 _{LAAL, incubating}	−0.28	0.75	−0.41	0.43	0.84
Black-footed albatross- Incubating trips
PC1 _{BFAL, incubating}	0.49	0.46	−0.49	−0.56	0.44
PC2 _{BFAL, incubating}	−0.66	0.75	0.31	−0.19	0.76
Laysan albatross- Brooding trips
PC1 _{LAAL, brooding}	−0.57	0.43	0.41	0.57	0.49
PC2 _{LAAL, brooding}	0.15	−0.26	0.91	−0.27	0.71
Black-footed albatross- Brooding trips
PC1 _{BFAL, brooding}	−0.53	0.40	0.60	−0.44	0.38
PC2 _{BFAL, brooding}	−0.49	0.32	0.62	−0.32	0.64

^aAfter model selection mean SST was used for models of reproductive success and Black-footed albatross trip metrics, while minimum SST was used for models of Laysan albatross trip metrics

ISSN: 2051-3933