Table 3.

Estimates of genetic differentiation among selected circumpolar Mytilus populations, from the 19-locus allozyme data set (Electronic supplement 2)

Species		M. trossulus						M. edulis
		NE Pacific Wa.	Wa.	NW Atlantic N.B.	NE Atlantic Barents Sea	White Sea	N Baltic	NEA White Sea	Barents Sea	NWA Maine
Sample code		1	2	3	22+23	37	13	40	6	4
M. trossulus
1	NEP Washington	–	−0.004	0.030	0.023	0.025	0.079	0.322	0.348	0.400
2	NEP Washington	0.005	–	0.021	0.025	0.019	0.062	0.302	0.316	0.379
3	NWA New Brunswick	0.062	0.047	–	0.011	0.005	0.055	0.294	0.306	0.342
22+23	NEA Barents Sea	0.053	0.045	0.033	–	−0.009	0.055	0.297	0.316	0.360
37	NEA White Sea	0.057	0.056	0.025	0.002	–	0.053	0.287	0.308	0.348
13	North Baltic	0.171	0.138	0.129	0.137	0.143	–	0.259	0.283	0.347
M. edulis
40	NEA White Sea	0.369	0.355	0.359	0.363	0.364	0.403	–	0.003	0.027
6	NEA Barents Sea	0.388	0.370	0.375	0.386	0.397	0.439	0.021	–	0.024
4	NWA Maine	0.420	0.409	0.396	0.409	0.408	0.463	0.075	0.066	–
H T	(gene diversity)	0.354	0.358	0.344	0.349	0.349	0.234	0.293	0.254	0.283

Above diagonal, Nei’s genetic distance, below diagonal, F _ST-distance (Reynolds et al. 1983). H _T average gene diversity. Sample codes refer to Table 1