This Is AuburnAUrora
  1. AUrora Home
  2. College of Sciences and Mathematics
  3. Browsing College of Sciences and Mathematics by Author

Browsing College of Sciences and Mathematics by Author "Hill, Geoffrey"

Now showing items 1-5 of 5

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 ...

The evolution of signal design in manakin plumage ornaments 

Doucet, Stephanie; Mennill, Daniel; Hill, Geoffrey; 0000-0001-9314-6700; 0000-0001-8864-6495 (2022-07-29)
Animal signals are characterized by two design components: efficacy (detectability) and content (message being conveyed). Selection for efficient signal perception should favor the evolution of traits that exhibit an optimal ...

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

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

Plumage color as a composite trait: Developmental and functional integration of sexual ornamentation 

Badyaev, Alexander; Hill, Geoffrey; Dunn, Peter; Glen, John; 0000-0002-7450-4194; 0000-0001-8864-6495 (2023-05-17)
Most studies of condition-dependent sexual ornaments have treated such ornaments as single traits. However, sexual ornaments are often composites of several components, each produced by partially independent developmental ...

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 ...