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Browsing Biological Sciences by Subject "sexual selection"

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Bacteria as an agent for change in structural plumage color: Correlational and experimental evidence 

Shawkey, Matthew; Pillai, Shreekumar; Hill, Geoffrey; Siefferman, Lynn; Roberts, Sharon; 0000-0001-8864-6495; 0000-0002-5131-8209; 0000-0002-9600-2902 (2023-05-17)
Recent studies have documented that a diverse assemblage of bacteria is present on the feathers of wild birds and that uropygial oil affects these bacteria in diverse ways. These findings suggest that birds may regulate ...

Is there an immunological cost to carotenoid-based ornamental coloration? 

Hill, Geoffrey; 0000-0001-8864-6495 (2022-07-28)

The Vitamin A-Redox Hypothesis: A Biochemical Basis for Honest Signaling via Carotenoid Pigmentation 

Hill, Geoffrey; Johnson, James D; 0000-0001-8864-6495 (2022-07-29)
Trade-offs in resource allocation have been widely stated as the means by which the honesty of ornamental traits is maintained, but an alternative to this resource trade-off hypothesis is that production of ornamentation ...