Table 2. Sampling information, number and proportion of individuals and number of haplotypes for the phylogenetic lineages A and B in different populations, annual temperature and ocean current for each population were also showed.

ID	Biogeographic region	Population	Annual temperature	Ocean current	Sample size	Date of collection	Number of individuals in lineage A (proportion, %)	Number of individuals in lineage B (proportion, %)
QD	South group	Qingdao	13.16	/	38	April 2005	38 (100%)	0
A	South group	Ainoshima Island	19.99	Tshushima Current	22	April 2005	22(100%)	0
F	South group	Fukuoka	19.99	Tshushima Current	12	April 2005	12(100%)	0
K	South group	Kanezaki	19.99	Tshushima Current	22	April 2005	22(100%)	0
KA	South group	Kagawa	17.93	Kuroshio Current	11	April 2005	11(100%)	0
H	South group	Hyogo	17.93	Kuroshio Current	24	April 2005	24(100%)	0
I	South group	Ise Bay	19.89	Kuroshio Current	24	May 2005	24(100%)	0
KAS	South group	Kashima	19.06	Transition zone	15	March 2006	14(93.3%)	1(6.7%)
O	South group	Otsuko	16.41	Transition zone	16	May 2004	13(81.3%)	3(18.7%)
SS	South group	Sendai Bay	14.17	Transition zone	22	April 2006	20(90.9%)	2(9.1%)
SN	North group	Sendai Bay	14.17	Transition zone	27	April 2006	9 (33.3%)	18(66.7%)
OD	South group	Oodose	16.78	Tshushima Current	30	May 2006	29(96.7%)	1(3.3%)
M	South group	Mutsu Bay	15.76	Tshushima Current	10	March 2006	8 (80%)	2(20%)
HA	North group	Hachinohe	13.81	Oyashio Current	41	June 2005	7 (17.1%)	34(82.9%)
IB	North group	Ishikari Bay	13.46	Tshushima Current	35	April 2006	13(37.1%)	22(62.9%)
R	North group	Rebun Island	11.26	Tshushima Current	18	June 2006	6(33.3*)	12(66.7%)
C	North group	Cape Soya	11.26	Tshushima Current	62	June 2006	27(43.5%)	35(56.5%)
Total					429		299(69.7%)	130(30.3%)