Table 5. Hierarchical analysis of molecular variance (AMOVA) of SNP data for 18 samples of swordfish.
| All localities | Excluding admixture areas | |||||
|---|---|---|---|---|---|---|
| Genetic Structure | Variance component | % of total | Fixation index | Variance component | % of total | Fixation index |
| Two Groups | ||||||
| G1: Atlantic (1–7,10–18) | G1: Atlantic (1–5, 12–18) | |||||
| G2: Mediterranean (8–9) | G2: Mediterranean (8–9) | |||||
| Among groups | 0.14991 | 6.63 | F CT = 0.06634** | 0.16037 | 7.05 | F CT = 0.07046** |
| Among populations within groups | 0.03691 | 1.63 | F SC = 0.01749*** | 0.04373 | 1.92 | F SC = 0.02067*** |
| Among individuals within populations | 0.03735 | 1.65 | F IS = 0.01802ns | 0.02306 | 1.01 | F IS = 0.01113ns |
| Within individuals | 2.03553 | 90.08 | F IT = 0.09920*** | 2.04876 | 90.02 | F IT = 0.09981*** |
| Three Groups | ||||||
| G1: North Atlantic (1–7,10–11) | G1: North Atlantic (1–5) | |||||
| G2: Mediterranean (8–9) | G2: Mediterranean (8–9) | |||||
| G3: South Atlantic (12–18) | G3: South Atlantic (12–18) | |||||
| Among groups | 0.11349 | 5.17 | F CT = 0.05171*** | 0.14314 | 6.45 | F CT = 0.06450*** |
| Among populations within groups | 0.00834 | 0.38 | F SC = 0.00401** | 0.00430 | 0.19 | F SC = 0.00207ns |
| Among individuals within populations | 0.03735 | 1.70 | F IS = 0.05171ns | 0.02306 | 1.04 | F IS = 0.1113ns |
| Within individuals | 2.03553 | 92.75 | F IT = 0.07253*** | 2.04876 | 92.32 | F IT = 0.07683*** |
ns = P > 0.05
* = P < 0.05
** = P < 0.01
*** = P < 0.001
Samples (in parentheses) were grouped into alternative groups (G1-G3) according to region of capture, with all localities, or excluding localities identified as areas of admixture (see text for explanation)