Figure 3. Visualization of distance based redundancy analyses (db-RDAs) of pike, Esox lucius, based on a) the full dataset, and b) a subset adaptive dataset consisting of the 17 loci identified in the outlier analyses as putatively under selection. Shape and color of dots indicate ecotype (blue pyramids: freshwater, grey circles: anadromous, and red squares: resident), and different shades within colors indicate populations in latitudinal order from lower (pale) to higher (dark). The black arrows indicate the effect of latitude (P < 0.001), and grey arrows the effect of midrange salinity (P< 0.001).