Fig. 3From: Judging a salmon by its spots: environmental variation is the primary determinant of spot patterns in Salmo salarSpot sampling. (Top) A region of interest (ROI) around the lateral line is selected in the image analysis tool for spot counting. Counts in the head region are manual. (Bottom) The ROI is cropped and saved (left) and then processed by the macro for counting (right)Back to article page