Figure 3
From: Parallel developmental genetic features underlie stickleback gill raker evolution
Marine/freshwater gill raker spacing differences are specified before gill raker budding. (A-F) Edar expression in developing ventral row 1 raker primordia in pre-bud (A-D) and early bud (E, F) stages (fish total length in millimeters shown at left) in Little Campbell marine (LITC) (A, C, E) and Fishtrap Creek freshwater (FTC). Scale bar = 25 um. (G, H) Significant differences in early bud stage ventral row 1 raker number (G) and spacing (H) between LITC (red) and FTC (blue) fish, detected by Edar in situ hybridization.