Table 5.

Hierarchical analysis of molecular variance (AMOVA) for MSP1a microsatellites.

Source of variation	d. f.	Sum of squares	Variance components	Percent variation
Ecological
Among ecoregions	3	3.99	0.04	16.31
Within ecoregions	109	24.49	0.22	83.69
Total	112	28.48	0.27	---
Geographic
Among continents	2	1.16	-0.08	-35.70
Among populations within continents	6	8.76	0.15	63.18
Within populations	104	18.57	0.18	72.52
Total	112	28.48	0.25	---

Table shows Wright's fixation index, F_ST. Statistical significance was calculated from 20,000 random permutations. Fixation indices and P-values: (Ecological) F_ST = 0.16 (P = 0.00 ± 0.00), (Geographic) F_ST = 0.29 (P = 0.00 ± 0.00).