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Table 5 Results of spatial analysis of molecular variance (SAMOVA), depicting patterns of population structure of Carcinus aestuarii for each predefined number of group (K)

From: Parapatric genetic divergence among deep evolutionary lineages in the Mediterranean green crab, Carcinus aestuarii (Brachyura, Portunoidea, Carcinidae), accounts for a sharp phylogeographic break in the Eastern Mediterranean

K Population structure Φ SC Φ ST Φ CT
2 [Tabarka + Bizerte + Sidi Rais + Kelibia + Benikhiar + Monastir + Chebba + Sfax + Djerba + Tripoli + Mosrata + Venice + Pomer + Amvrakikos + Lefkada + Navarino] [Alexandroupolis + Izmir Bay + Enez Dalyan Lagoon + Dardanelles Strait + Prince’s Islands + Bosphorus Strait] 0.165*** 0.792*** 0.750***
3 [Tabarka + Bizerte + Sidi Rais + Kelibia + Benikhiar + Monastir + Chebba + Djerba + Tripoli + Mosrata + Venice + Pomer + Amvrakikos + Lefkada + Navarino] [Sfax] [Alexandroupolis + Izmir Bay + Enez Dalyan Lagoon + Dardanelles Strait + Prince’s Islands + Bosphorus Strait] 0.081*** 0.766*** 0.745***
4 [Tabarka + Bizerte + Sidi Rais + Kelibia + Benikhiar + Monastir + Chebba + Djerba + Tripoli + Mosrata + Venice + Pomer + Amvrakikos + Lefkada + Navarino] [Sfax] [Alexandroupolis + Izmir Bay + Enez Dalyan Lagoon + Prince’s Islands + Bosphorus Strait] [Dardanelles Strait] 0.085*** 0.762*** 0.740***
5 [Tabarka + Bizerte + Sidi Rais + Kelibia + Benikhiar + Monastir + Chebba + Djerba + Tripoli + Mosrata + Venise + Pomer + Amvrakikos + Lefkada + Navarino] [Sfax] [Izmir Bay] [Alexandroupolis + Enez Dalyan Lagoon + Prince’s Islands + Bosphorus Strait] [Dardanelles Strait] 0.089*** 0.758*** 0.735***
6 [Tabarka + Bizerte + Sidi Rais + Kelibia + Benikhiar + Monastir + Chebba + Djerba + Tripoli + Mosrata + Venice + Pomer + Amvrakikos + Lefkada + Navarino] [Sfax] [Izmir Bay] [Alexandroupolis + Enez Dalyan Lagoon + Prince’s Islands] [Dardanelles Strait] [Bosphorus Strait] 0.093*** 0.755*** 0.729***
7 [Tabarka + Bizerte + Sidi Rais + Kelibia + Benikhiar + Monastir + Chebba + Djerba + Tripoli + Mosrata + Venice + Pomer + Amvrakikos + Lefkada + Navarino] [Sfax] [Izmir Bay] [Alexandroupolis + Enez Dalyan Lagoon] [Prince’s Islands] [Dardanelles Strait] [Bosphorus Strait] 0.101*** 0.750*** 0.722***
8 [Tabarka + Bizerte + Sidi Rais + Kelibia + Benikhiar + Monastir + Chebba + Tripoli + Mosrata + Venice + Pomer + Amvrakikos + Lefkada] [Sfax] [Djerba] [Navarino] [Alexandroupolis + Enez Dalyan Lagoon + Prince’s Islands] [Izmir Bay] [Dardanelles Strait] [Bosphorus Strait] 0.015*** 0.717*** 0.713***
  1. Partitioning of variance among groups (ΦCT) is highest when there are two hierarchical groups (K = 2, shown in bold). *** Significant difference at P < 0.001