Table 1. Sampling information and genetic variation indices for microsatellites.

Locality	Abb.	Coordinates	Sampling date	Sample size	Av HO	Av HE	Av PIC	Av AR	FIS
Dandong	DD	39°50′N,124°12′E	2014.05	24	0.806	0.888	0.857	11.677	0.095
BLA	BLA	40°15′N,121°45′E	2007.10	24	0.794	0.886	0.855	11.233	0.106
BLB	BLB	39°45′N,120°45′E	2007.10	24	0.803	0.890	0.860	11.188	0.100
Qinhuangdao	QHD	39°55′N,119°37′E	2014.09	15	0.822	0.873	0.828	10.942	0.060
Dongying	DY	37°45′N,119°15′E	2009.09	16	0.687	0.862	0.814	10.085	0.209
Weihai	WH	37°20′N,123°20′E	2009.09	24	0.770	0.889	0.858	11.317	0.136
Qingdao	QD	36°N,120°30′E	2009.09	20	0.796	0.876	0.840	10.933	0.094
SYA	SYA	35°19′N,122°E	2005.04	24	0.767	0.891	0.860	11.137	0.142
SYB	SYB	33°58′N,123°30′E	2005.04	24	0.735	0.881	0.848	10.815	0.168
SYC	SYC	31°45′N,124°05′E	2005.03	23	0.793	0.895	0.864	11.300	0.116
Yangtze River estuary	CJK	31°05′N,121°59′E	2013.11	20	0.797	0.875	0.839	11.191	0.092
NEA	NEA	28°30′N,123°30′E	2007.09	23	0.823	0.900	0.869	11.824	0.087
NEB	NEB	28°30′N,123°E	2007.09	30	0.717	0.887	0.860	11.111	0.194
Wenling	WL	28°15′N,121°29′E	2014.03	22	0.827	0.889	0.857	11.463	0.072
Xiapu	XP	26°50′N,120°07′E	2014.03	24	0.783	0.887	0.856	11.515	0.119

Abbreviation of populations (Abb.), average of observed heterozygosity (Av H_O), average of expected heterozygosity (Av H_E), average of Polymorphism Information Content (Av PIC), average of allelic richness (Av A_R) and inbreeding coefficient (F_IS).