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Table 1 Estimated demographic parameters with IMa2

From: Evidence for late Pleistocene origin of Astyanax mexicanus cavefish

  HiPt HPD 95%
q0 (4Neu Pachón) 0.300 0.300–2.300
q1 (4Neu Surface) 21.500 13.300–32.700
q2 (4Neu Ancestral) 89.700 64.700–146.500
t0 (tu) 0.730 0.186–2.602
m0 > 1 (m0- > 1/u) 1.702 0.948–4.232
m1 > 0 (m1- > 0/u) 0.013 0.000–0.308
Ne Pachón 150 150–1150
Ne Surface 10,750 6650–16,350
Ne ancestral 44,850 32,350–73,250
t 5110 1302–18,214
mS- > P 8.5 × 10− 4 4.7–21.2 × 10− 4
mP- > S 6.5 × 10− 6 0.0–1.5 × 10− 4
  1. We assumed a mutation rate (u) of 0.0005 and a mean generation time (g) of 3.5 years (2 years for surface fish and 5 years for cavefish). HiPt: the highest value in the histogram of the posterior marginal density. HPD 95%: the lower and upper bound of the estimated 95% highest posterior density (HPD) interval. Effective population size (Ne) Pachón = q0 / 4u; Ne surface = q1 / 4u; Ne ancestral = q2 / 4u; t (divergence time in years) = t0 x g / u; mS- > P (migration rate from surface to Pachón) = m0 > 1 x u; mP- > S (migration rate from Pachón to surface) = m1 > 0 x u. m0 > 1 and m1 > 0 are migration rate backward in time, whereas mS- > P and mP- > S are migration rate forward in time