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Fig. 1. Adult stripe development and loss in danios. (A) Adult D. rerio
exhibit dark stripes of melanophores and iridophores (with few xanthophores),
alternating with light stripes of xanthophores and iridophores (with few
melanophores). (B) Adult D. albolineatus lack distinctive melanophore
stripes and exhibit only a weak interstripe region posteriorly. (C)
fms mutant D. rerio exhibit disrupted stripes in which
metamorphic melanophores are reduced and xanthophores are absent. (D) Detail
of stripes and interstripes in D. rerio. Dark cells are melanophores
and yellow-orange cells are xanthophores (arrow). Reflective iridophores are
found throughout, but are organized differently in interstripe regions
(arrowheads); under this illumination, iridophores outside of the interstripe
region are evident only by their blue iridescence over some melanophores. (E)
Detail of pigment pattern in D. albolineatus adult. Melanophores are
widely distributed over the flank. Adults exhibit reddish erythrophores
(arrow) distributed widely over the flank and interstripe iridophores
(arrowheads) form only a narrow, irregular band over part of the flank.
Erythrophores are present in several other danios as well, although not in
D. rerio. Adult fish are 25-30 mm in length. Scale bars in D: 200
µm for D,E.
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