Keratin nanofiber distribution and feather microstructure in penguins
Penguins exhibit an array of derived feather features and color-producing mechanisms, including distinct melanosome morphologies and beta-keratin nanofibers that produce blue structural color. Several morphologies have been proposed to have hydrodynamic or insulatory functions. An understanding of t...
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ftunivgent:oai:archive.ugent.be:8606791 2023-06-11T04:11:49+02:00 Keratin nanofiber distribution and feather microstructure in penguins Kulp, Felicia B D'Alba Altamirano, Liliana Shawkey, Matthew Clarke, Julia A 2018 application/pdf https://biblio.ugent.be/publication/8606791 http://hdl.handle.net/1854/LU-8606791 https://doi.org/10.1642/auk-18-2.1 https://biblio.ugent.be/publication/8606791/file/8651404 eng eng https://biblio.ugent.be/publication/8606791 http://hdl.handle.net/1854/LU-8606791 http://dx.doi.org/10.1642/auk-18-2.1 https://biblio.ugent.be/publication/8606791/file/8651404 No license (in copyright) info:eu-repo/semantics/restrictedAccess AUK ISSN: 0004-8038 ISSN: 1938-4254 Biology and Life Sciences nanofibers Sphenisciformes structural color PLUMAGE COLOR EUDYPTULA-MINOR EVOLUTION SHAPE PIGMENTATION journalArticle info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2018 ftunivgent https://doi.org/10.1642/auk-18-2.1 2023-05-10T22:36:21Z Penguins exhibit an array of derived feather features and color-producing mechanisms, including distinct melanosome morphologies and beta-keratin nanofibers that produce blue structural color. Several morphologies have been proposed to have hydrodynamic or insulatory functions. An understanding of the distribution of these morphologies over the body of a single penguin species may elucidate their evolution and function. We investigated feather microstructure and color production mechanisms in blue, black, and white barbs of feathers of the Gentoo Penguin (Pygoscelis papua). Light and scanning electron microscopy revealed that all feathers, regardless of color, are semilunate in cross section and lack, or show greatly reduced, air-filled compartments (central vacuoles) in feather barbs. Keratin nanofibers are present in all sampled feathers (including those of 8 other penguin species) but are surrounded by melanin in black barbs and disorganized in white barbs. Reduction of the air-filled central vacuole and gain of keratin nanofibers appear to have single origins in penguins. Given that they occur in all feathers regardless of color, we hypothesize that nanofibers have been co-opted for color production but initially arose for another function. Article in Journal/Newspaper Gentoo penguin Pygoscelis papua Ghent University Academic Bibliography The Auk 135 3 777 787 |
institution |
Open Polar |
collection |
Ghent University Academic Bibliography |
op_collection_id |
ftunivgent |
language |
English |
topic |
Biology and Life Sciences nanofibers Sphenisciformes structural color PLUMAGE COLOR EUDYPTULA-MINOR EVOLUTION SHAPE PIGMENTATION |
spellingShingle |
Biology and Life Sciences nanofibers Sphenisciformes structural color PLUMAGE COLOR EUDYPTULA-MINOR EVOLUTION SHAPE PIGMENTATION Kulp, Felicia B D'Alba Altamirano, Liliana Shawkey, Matthew Clarke, Julia A Keratin nanofiber distribution and feather microstructure in penguins |
topic_facet |
Biology and Life Sciences nanofibers Sphenisciformes structural color PLUMAGE COLOR EUDYPTULA-MINOR EVOLUTION SHAPE PIGMENTATION |
description |
Penguins exhibit an array of derived feather features and color-producing mechanisms, including distinct melanosome morphologies and beta-keratin nanofibers that produce blue structural color. Several morphologies have been proposed to have hydrodynamic or insulatory functions. An understanding of the distribution of these morphologies over the body of a single penguin species may elucidate their evolution and function. We investigated feather microstructure and color production mechanisms in blue, black, and white barbs of feathers of the Gentoo Penguin (Pygoscelis papua). Light and scanning electron microscopy revealed that all feathers, regardless of color, are semilunate in cross section and lack, or show greatly reduced, air-filled compartments (central vacuoles) in feather barbs. Keratin nanofibers are present in all sampled feathers (including those of 8 other penguin species) but are surrounded by melanin in black barbs and disorganized in white barbs. Reduction of the air-filled central vacuole and gain of keratin nanofibers appear to have single origins in penguins. Given that they occur in all feathers regardless of color, we hypothesize that nanofibers have been co-opted for color production but initially arose for another function. |
format |
Article in Journal/Newspaper |
author |
Kulp, Felicia B D'Alba Altamirano, Liliana Shawkey, Matthew Clarke, Julia A |
author_facet |
Kulp, Felicia B D'Alba Altamirano, Liliana Shawkey, Matthew Clarke, Julia A |
author_sort |
Kulp, Felicia B |
title |
Keratin nanofiber distribution and feather microstructure in penguins |
title_short |
Keratin nanofiber distribution and feather microstructure in penguins |
title_full |
Keratin nanofiber distribution and feather microstructure in penguins |
title_fullStr |
Keratin nanofiber distribution and feather microstructure in penguins |
title_full_unstemmed |
Keratin nanofiber distribution and feather microstructure in penguins |
title_sort |
keratin nanofiber distribution and feather microstructure in penguins |
publishDate |
2018 |
url |
https://biblio.ugent.be/publication/8606791 http://hdl.handle.net/1854/LU-8606791 https://doi.org/10.1642/auk-18-2.1 https://biblio.ugent.be/publication/8606791/file/8651404 |
genre |
Gentoo penguin Pygoscelis papua |
genre_facet |
Gentoo penguin Pygoscelis papua |
op_source |
AUK ISSN: 0004-8038 ISSN: 1938-4254 |
op_relation |
https://biblio.ugent.be/publication/8606791 http://hdl.handle.net/1854/LU-8606791 http://dx.doi.org/10.1642/auk-18-2.1 https://biblio.ugent.be/publication/8606791/file/8651404 |
op_rights |
No license (in copyright) info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1642/auk-18-2.1 |
container_title |
The Auk |
container_volume |
135 |
container_issue |
3 |
container_start_page |
777 |
op_container_end_page |
787 |
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1768387140765351936 |