The origin of the parrotfish species Scarus compressus in the Tropical Eastern Pacific: region-wide hybridization between ancient species pairs

Table 2 Model selection results from six Migrate models simulating introgression across three species boundaries

Model	M parameters	ln(mL)	LBF	Probability
1	Full model—all	− 4443.47		6.824E−87
2	Sp → Sg Sp ← Sg Sr → Sg Sr ← Sg	− 4394.11	98.72	1.866E−65
3^a	Sr → Sg	− 4339.68	108.86	8.119E−42
4^a	Sp → Sg	− 4250.54	178.28	0.004
5	Sp → Sg Sr → Sg	− 4247.52	6.04	0.086
6^a	Sp → Sg Sp ← Sg	− 4245.16	4.72	0.909

Arrows specify the direction of introgression. Ln(mL) are the log marginal-likelihoods estimated using the Bezier approximation. Log Bayes factors (LBF) are calculated by comparing Model x with the Model x − 1
Sp—S. perrico, Sr—S. rubroviolaceus, Sg—S. ghobban
^a Models 3, 4, and 6 include a constant low migration parameter (M = 0.001) to meet the assumptions of connectivity among all populations. Italic text indicates the best fitting model = Model 6

ISSN: 2730-7182