Figure 4.

Genetic trends across the Pacific. (a) Genetic diversity (using the value 1-Qinter, the inter-individual diversity within populations) was highest in the United States and tended to decrease with increasing distance from the source population. (b) Allelic richness was higher in the United States and significantly decreased across the Pacific. (c) A weak pattern of isolation by distance was found (r = 0.3833, p = 0.062). (d) Gene flow ranged from 2 to 15 individuals per generation and was highest from Hawaii to the United States. (e) Pacific structure plot indicating K = 3. Increased population differentiation and a clinal pattern appear when examined at a finer spatial scale.