Fig. 1From: Optimization of a suite of flathead catfish (Pylodictis olivaris) microsatellite markers for understanding the population genetics of introduced populations in the northeast United StatesA Location of flathead catfish (Pylodictis olivaris) samples sites on the Schuylkill and Susquehanna rivers in Pennsylvania and Maryland. B Proportion of individual membership to each of K = 2 (top) and K = 4 (bottom) genetic clusters inferred from STRUCTURE analysis for four collections of flathead catfish. C First two dimensions of the principal coordinate analysis (PCoA) for flathead catfish collected from the Schuylkill and Susquehanna rivers. Map produced using ArcGISBack to article page