Hybridation naturelle entre les anguilles américaines et européennes. Ampleur, répartition et stades de vie

Liste des illustrations

• Figure 1 . Geographic distribution of eel sampling sites in Iceland (top panel), North America and Europe (bottom panel). Star symbols refer to locations where both glass eels and yellow eels were collected. Icelandic samples are: Öxnalaekur (ÖX); Stokkseyri (ST); Grafarvogur (GR); Vífilsstadavatn (VI); Seljar (SE); Vogslaekur (VO); Bár (BA); Reykhólar (RE); Vatnsdalur (VA); Sauðárkrókur (SA). North American eel locations: Medomak River (ME); Boston Harbor (BO); Wye River (WY); St-Johns River (SJ). European eel locations: Elbe River (EL); Grand Lieu Lake (GL); Minho River (MI); Moulouya oued (MO).
• Figure 2 . Admixture proportions of North American, European, and Icelandic samples. Each individual is represented by a vertical bar; the proportion of black and white in each bar represents the proportion of the individual’s genome from Anguilla rostrata (American) and A. anguilla (European) ancestry , respectively. The dotted horizontal line indicates the 0.5 admixture level. Null values refer to admixture proportions smaller than 0.001, while 1 refers to admixture values larger than 0.999.
• Figure 3 . Proportions of pure Anguilla rostrata (closed bars), pure A. anguilla (open bars), first generation (dotted), and later generation hybrids (striped) within each sampling sites for continental Europe, Iceland, and North America. Population abbreviations are defined in figure 1 legend.
• Figure 4 . Relationship between the proportion of F ₁ (A), F _N (B), or F ₁ and F _N combined (C) with time period (defined in Materials and Methods section). Chi-square ( χ² ) and p-values are presented. Solid diamonds refer to yellow eel samples and opened diamonds to the glass eel samples.
• Figure 5 . Pearson correlation (R ² ) between the proportion of hybrids and latitude (first and later generation hybrids combined) in Icelandic samples.