Fig. 4.

Association between wild population size and levels of hybridization. a River axial distance (i.e., the distance along a straight line along the longest axis of the river). b Relationship between river axial distance and the proportions of wild, feral, and all hybrid (i.e., sum of proportions of F₁, F₂, BC wild, and BC farm) young-of-the-year Atlantic salmon sampled in 2014. c Relationship between mean number of salmon angled (2010–2014) and the proportions of wild, feral, and hybrid young-of-the-year Atlantic salmon sampled in 2014. The gray shading is the 95% CI of the prediction of the linear models. See Supplementary Table 4 for model parameter estimates