Figure 8. Cline analysis showing the fit of the best model based on the proportional assignment of populations to the Bruce spanworm genetic cluster (Q ) for each sampled year along the Connecticut transect (top) and the geographic center ± 2LL as estimated in the R package ‘hzar’ (middle). The number of individuals collected at each trap averaged across the 2016-2018 sample years (bottom). Distances are presented in relationship to CT01.