Table 1.

Summary of genomic diversity assessed by RAD sequencing among gray and harbor seals from the Northwest Atlantic. Values are presented as the mean (and standard deviation) per locus per sample group for allelic richness corrected by rarefaction to the sample size of the smallest cohort or colony (A_R) and expected heterozygosity (H_E)

Species	Location	Cohort	N	AR	HE
Gray seal	Gulf of St Lawrence	2015	32	1.83 (0.38)	0.20 (0.17)
	Sable Island	All	153	1.84 (0.27)	0.20 (0.17)
		1973–74	28	1.81 (0.39)	0.21 (0.18)
		1985	29	1.82 (0.38)	0.21 (0.17)
		1998	32	1.83 (0.35)	0.21 (0.17)
		2004	32	1.82 (0.37)	0.21 (0.18)
		2015	32	1.82 (0.36)	0.21 (0.18)
	Muskeget Island	All	67	1.84 (0.32)	0.20 (0.17)
		2002	33	1.66 (0.47)	0.16 (0.18)
		2015–16	34	1.67 (0.46)	0.17 (0.18)
	Total		252
Harbor seal	Northeast United States	1992–98	11	1.62 (0.49)	0.16 (0.18)
		2003–05	19	1.58 (0.42)	0.16 (0.18)
		2013–15	25	1.58 (0.40)	0.16 (0.18)
	Total		55