Table 1. Sample descriptions including locations, coordinates, dates, spawning seasons, percentage of fish in spawning condition and sample sizes (n) of genetic markers used.

Location	Sampling coordinates	Date	Spawning season	Spawning (%)	Fish (n)	Microsatellites (including Cpa112) (n)	MHC (n)	Allozymes (n)	mtDNA (n)	All markers in the same fish (n)
Flamborough	54.60N/00.59W	14-09-2002	Autumn	100	80	80a,b	73	55	80	48
Flamborough	54.57N/00.45W	17-09-2003	Autumn	99	93	93a,b,c,d	80	93c	91	79
Berwick	56.30N/00.97E	20-08-2002	Autumn	98	90	90a,b	83e	85	85	73
Berwick	57.70N/01.45W	22-08-2003	Autumn	88	96	96a,b,c	90	96c	80	72
Tjøme	59.35N/10.55E	13-03-2002	Spring	98	95	95b,f	95e	95	84	84
Tjøme	59.35N/10.55E	04-03-2003	Spring	100	104	104b,c,d,f	94	104c	86	75
Kalix	65.80N/22.72E	12-06-2002	Spring	44	97	97g	90	97g	85	78
Kalix	65.80N/22.72E	19-06-2003	Spring	94	88	88c,g	79	88c,g	69	64
				Sum	743	743	684	713	660	573

Abbreviations: MHC, major histocompatibility complex; mtDNA, mitochondrial DNA.

Only fish that were successfully analyzed for at least three different genetic marker types were used in subsequent statistical analyses. Genotypes previously used by

^aMariani et al. (2005)

^bRuzzante et al. (2006)

^cLarsson et al. (2007)

^dGaggiotti et al. (2009)

^eStet et al. (2008)

^fBekkevold et al. (2005)

^gLarsson et al. (2010).