Table S6.

Priors used for generating the reference tables used in the first ABC-RF tournament to determine which among the four divergence scenarios was the most likely

Parameters	Parameter name	Scenario 1	Scenario 2	Scenario 3	Scenario 4
Population size parameters	Ne North Sea	100–500,000	100–500,000	100–500,000	100–500,000
	Ne Pelagic	100–200,000	100–200,000	100–200,000	100–200,000
	Ne Demersal	100–100,000	100–100,000	100–100,000	100–100,000
	Ne Bottleneck pelagic*	10–50,000	10–50,000	10–50,000	10–50,000
	Ne Bottleneck demersal*	10–20,000	10–20,000	10–20,000	10–20,000
	Ancestral Ne†	0–100,000	0–100,000	0–100,000	0–100,000
Times of events	Split of pelagic lineage	100–5,000	500–10,000	100–5,000	500–10,000
	Split of demersal lineage	500–10,000	100–5,000	500–10,000	100–5,000
	Ancestral Ne expansion†	10,000–50,000	10,000–50,000	10,000–50,000	10,000–50,000
	Time of secondary admixture‡	0–5,000	0–5,000	0–5,000	0–5,000
Admixture proportion	Admixture proportion‡	0.01–0.2	0.01–0.2	0.01–0.2	0.01–0.2

^*Parameters only included in bottleneck scenarios.

^†Parameters only included in the scenarios including ancestral population expansion.

^‡Parameter only included in the scenarios with introgression.