Effect of preen oil on plumage bacteria: An experimental test with the mallard

@article{Giraudeau2013EffectOP,
  title={Effect of preen oil on plumage bacteria: An experimental test with the mallard},
  author={Mathieu Giraudeau and G{\'a}bor {\'A}rp{\'a}d Czirj{\'a}k and Camille Duval and Vincent Bretagnolle and C. Gutierrez and No{\"e}l Guillon and Philipp Heeb},
  journal={Behavioural Processes},
  year={2013},
  volume={92},
  pages={1-5}
}
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Sources of variation in uropygial gland size in European birds
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Chemical regulation of body feather microbiota in a wild bird
TLDR
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References

SHOWING 1-10 OF 46 REFERENCES
No detected effect of moult on feather bacterial loads in mallards Anas platyrhynchos
TLDR
It is found that moult had no significant effect on total cultivable and feather-degrading bacterial loads on feathers, and the bacterial contamination that takes place after moult overrides the potential role of moult as a mechanism to reduce feather bacterial loads.
EXPERIMENTAL TEST OF THE IMPORTANCE OF PREEN OIL IN ROCK DOVES (COLUMBA LIVIA)
TLDR
The results are the first rigorous demonstration that preen oil is important for plumage condition in nonwaterfowl and that it has insecticidal properties and that reduction in plumages condition on birds without glands is due to an increase in ectoparasites.
Effects of access to preen gland secretions on mallard plumage
TLDR
It is shown that preen oil acts to maintain plumage condition and suggests that feather microstructure is essential to maintain feathers waterproofness, and shows that plumage waterproofness is mostly due to the spatial micro-structure of feathers.
Symbiotic bacteria living in the hoopoe's uropygial gland prevent feather degradation
TLDR
The results suggest that by preening their feathers hoopoes benefit from their symbiotic relationship with bacteriocin-producing enterococci, which constitute a chemical defence against feather degradation.
Chemical warfare? Effects of uropygial oil on feather‐degrading bacteria
TLDR
Results suggest that birds may defend themselves against some feather-degrading bacteria using uropygial oil, which appears to enhance the growth of one weakly feather- Degrading isolate.
Feather micro‐organisms and uropygial antimicrobial defences in a colonial passerine bird
TLDR
It is suggested that the uropygial gland plays a specific role in regulating the abundance of feather-degrading bacteria that furthermore depends on the social environment of the host.
Seasonally Changing Preen-Wax Composition: Red Knots' (Calidris Canutus) Flexible Defense Against Feather-Degrading Bacteria
TLDR
It is suggested that preen waxes protect feathers by forming a physical barrier to microbes rather than through chemical properties of the waxes.
Bacteria as an Agent for Change in Structural Plumage Color: Correlational and Experimental Evidence
TLDR
It is found that keratinolytic bacteria increased the brightness and purity, decreased the ultraviolet chroma, and did not affect the hue of structural color, suggesting that bacteria can alter structural plumage color through degradation.
Do feather-degrading bacteria affect sexually selected plumage color?
TLDR
It is found that males with the redder plumage preferred by females had similar overall bacterial loads, but lower feather-degradingacterial loads, than males with less red plumage, which suggests that plumage color can signal abundance of feather- degrading bacteria to potential mates.
Feather-Degrading Bacteria: A New Frontier in Avian and Host–Parasite Research?
Birds are important models for the study of host–parasite interactions (Loye and Zuk 1991, Clayton and Moore 1997). Much of this research has focused on arthropod ectoparasites that feed on feathers
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