Table 3.

Loadings of the social measurements onto the first principle component, both total population and split by sex.

	PC1: All	PC1: Female	PC1: Male
Alone	−0.47	−0.48	−0.25
Large	0.53	0.51	0.55
Associates	0.50	0.50	0.59
Same-sex associates	0.50	0.50	0.53
Total % of variation	75.98	86.10	61.18

All measures were present on PC1, but time alone loaded heavily onto PC2 as well (all = 0.68, females = 0.77, males = 0.80). For all individuals, PC2 explained 16.58% of variation, for females 7.36%, but for males 30.42%.

N = 218 dolphins, 112 female, 106 male.