Table 4. Posterior probabilities and 95% confidence intervals (CI) for the most likely dispersal history scenarios when the best scenarios from each ancestral set are compared against each other.

	Scenario #	PP 2x105	95% CI	PP 6x105	95% CI
Mediterranean ancestral	1	0.0259	0–0.0517	0.0688	0.0553–0.0823
	2	0.0267	0.0007–0.0526	0.0813	0.0677–0.0948
NE Atlantic ancestral	14	0.0408	0.0109–0.0707	0.0956	0.0820–0.1093
NW Atlantic ancestral	15	0.0399	0.0145–0.0652	0.0785	0.0606–0.0963
	48	0.2513	0.2283–0.2743	0.1735	0.1546–0.1925
	55	0.1015	0.0810–0.1219	0.1302	0.1150–0.1454
Pacific ancestral	21	0.2483	0.2266–0.2700	0.2031	0.1821–0.2242
	26	0.2657	0.2429–0.2886	0.1689	0.1512–0.1866

Results from both maximum N_e max = 2 x 10⁵ and maximum N_e = 6 x 10⁵ are presented. PP = posterior probability of each scenario.