Pigment patterns in adult fish result from superimposition of two largely independent pigmentation mechanisms |
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Authors: | Rosa M Ceinos Raúl Guillot Josep Rotllant |
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Institution: | 1. Aquatic Molecular Pathobiology Group, Instituto de Investigaciones Marinas, Consejo Superior de Investigaciones Cientificas (CSIC), Vigo, Spain;2. Control of Food Intake Group, Department of Fish Physiolgy and Biotechnology, Instituto de Acuicultura de Torre de la Sal (IATS‐CSIC), Castellón, Spain |
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Abstract: | Dorso‐ventral pigment pattern differences are the most widespread pigmentary adaptations in vertebrates. In mammals, this pattern is controlled by regulating melanin chemistry in melanocytes using a protein, agouti‐signalling peptide (ASIP). In fish, studies of pigment patterning have focused on stripe formation, identifying a core striping mechanism dependent upon interactions between different pigment cell types. In contrast, mechanisms driving the dorso‐ventral countershading pattern have been overlooked. Here, we demonstrate that, in fact, zebrafish utilize two distinct adult pigment patterning mechanisms – an ancient dorso‐ventral patterning mechanism, and a more recent striping mechanism based on cell–cell interactions; remarkably, the dorso‐ventral patterning mechanism also utilizes ASIP. These two mechanisms function largely independently, with resultant patterns superimposed to give the full pattern. |
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Keywords: | agouti pigment pattern formation
asip1
dct
tyrp1b
xdh
ltk
mitfa
melanophore melanocyte iridophore chromatophore transgenic zebrafish |
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