Fig. 2From: Assessing the migratory histories, trophic positions, and conditions of lake sturgeon in the St. Croix and Mississippi Rivers using fin ray microchemistry, stable isotopes, and fatty acid profilesPhotographs illustrating the laser ablation analyses using full “core to edge” transects corresponding to November 2015 (a) and smaller separate “core” and “edge” transects corresponding to March 2016 (b). Red circles highlight ablation linesBack to article page