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Figure Caption
Fig. 1 Comparable regeneration of the caudal fin in young and old zebrafish.
(A–F′) The caudal fin prior to amputation (A,D), immediately after amputation (B,E) and 13 days after amputation (C,C′,F,F′) in young (A–C′) and old (D–F′) fish. C′ and F′ show close ups of the boxed areas in C and F, respectively. Dashed lines in A and D indicate the amputation lines. Arrows in C and F indicate the levels of amputation in the regenerated fin, which is visible by the altered pigmentation pattern. Scale bar: 5mm; the degree of zoom: ×5. (G,H) Schematic representations of the measured regenerative length at the center (G) and near the dorsal edge (H) of the regenerating fin. The angles between the measured lines along the dorsal edge and the center were 25.1±2.9 degrees and 27.1±4.7 degrees in young and old fish, respectively. The graphs show recovery ratio at indicated time-points from amputation in young and old fish.
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