Over het archief
Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.
Dit archief wordt uitgebouwd en beheerd volgens de principes van de Open Access Movement, en het daaruit ontstane Open Archives Initiative.
Basisinformatie over ‘Open Access to scholarly information'.
| one publication added to basket [307955] |
Keratin nanofiber distribution and feather microstructure in penguins
Kulp, F.B.; D'Alba, L.; Shawkey, M.D.; Clarke, J.A. (2018). Keratin nanofiber distribution and feather microstructure in penguins. The Auk 135(3): 777-787. https://dx.doi.org/10.1642/AUK-18-2.1
In: The Auk: A quarterly journal of ornithology. The American Ornithologists' Union: Washington, D.C.. ISSN 0004-8038; e-ISSN 1938-4254, meer
|  |
| Trefwoord |
|
| Author keywords |
nanofibers; Sphenisciformes; structural color |
| Auteurs | | Top |
- Kulp, F.B.
- D'Alba, L., meer
- Shawkey, M.D., meer
- Clarke, J.A.
|
|
|
| Abstract |
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 semi-lunate 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. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
