TABLE 7

Scaled model parameters and demographic quantities from IMa analyses of nuclear protein-coding loci in D. pulex and D. pulicaria

Scaled model parameterHigh pointLower boundUpper bound
θpulex12.949.7617.12
θpulicaria5.713.888.21
θancestor3.611.725.84
t1.250.891.92
m1 (D. pulicariaD. pulex)0.030.010.16
m2 (D. pulexD. pulicaria)0.170.040.41
Demographic quantity
Ne, effective population size for D. pulex1,100,000801,0001,404,000
Ne, effective population size for D. pulicaria468,000318,000673,000
Ne, common ancestor296,000141,000479,000
Divergence time (years)82,00058,000126,000
2Nem, the effective number of gene migrants from D. pulicaria to D. pulex per generation0.160.021.37
1.71*1.34*2.14*
2Nem, the effective number of gene migrants from D. pulex to D. pulicaria per generation0.470.081.68
1.67*1.28*2.10*
  • Estimates of migration obtained with LAMARC are also shown (indicated with asterisks). Lower and upper bounds are the estimated 90% highest posterior density, except for the LAMARC estimates, in which they represent 95% support intervals. Demographic quantity estimates were obtained using the mutation rate estimate of 2.9 × 10−8 mutations/site/year [rate from Haag-Liautard et al. (2007), assuming five generations per year in Daphnia].