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Table 3 Analysis of molecular variance testing for partitioning of Pachygrapsus marmoratus genetic variation under alternative biogeographic hypotheses

From: Unravelling population genetic structure with mitochondrial DNA in a notional panmictic coastal crab species: sample size makes the difference

Hypothesis Source of variation df F-statistics P
1) three groups, geography
- Atlantic (PS + AZ + CA) Among groups 2 Φct = 0.34 <0.001
- Mediterranean Sea (including Alboran Sea, MC) Among pops/within groups 47 Φsc = 0.02 0.067
- Black Sea Among populations 530 Φst = 0.35 <0.001
2) three groups, Orano-Almeria front
- Atlantic and Alboran Sea (PS + AZ + CA + MC) Among groups 2 Φct = 0.32 <0.001
- Mediterranean Sea (excluding Alboran Sea, MC) Among pops/within groups 47 Φsc = 0.01 0.104
- Black Sea Among populations 530 Φst = 0.33 <0.001
3) three groups, PCoA
- Northernmost Atlantic (PS + AZ) Among groups 2 Φct = 0.36 <0.001
- Mediterranean Sea (including Alboran Sea, MC) + Canary Island Among pops/within groups 47 Φsc = 0.02 0.047
- Black Sea Among populations 530 Φst = 0.37 <0.001
4) five groups, differences within Med
- Northernmost Atlantic (PS + AZ)     
- western Mediterranean Sea (including Alboran Sea, MC) + Canary Islands Among groups 4 Φct = 0.21 <0.001
- eastern Mediterranean Sea Among pops/within groups 45 Φsc = 0.003 0.387
- Adriatic Sea Among populations 530 Φst = 0.22 <0.001
- Black Sea     
  1. Degrees of freedom (df), F-statistics and P-values are reported. Significant P values are shown in bold. Population abbreviations correspond to those reported in Table 1