Figure 1
From: Introgressive hybridization and latitudinal admixture clines in North Atlantic eels
Minimum-spanning haplotype network based on a partial sequence of cytb (276 bp). The non-overlapping haplotype distribution among continental samples of American (orange, n = 15) and European eels (blue, n = 34) becomes apparent. A fraction of eels (n = 16) sampled in Iceland carry a typical American haplotype (black), and are thus suspected to be of hybrid origin. The scale on the bottom right-hand side indicates the number of individuals sharing a given haplotype.