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Browsing Biological Sciences by Author "Geoffrey Hill, hillgee@auburn.edu"

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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 ...

Contrasting evolution of virulence and replication rate in an emerging bacterial pathogen 

Tardy, Luc; Giraudeau, Mathieu; Hill, Geoffrey E.; McGraw, Kevin J.; Bonneaud, Camille; 0000-0001-8864-6495 (2020-05-26)
Host resistance through immune clearance is predicted to favor pathogens that are able to transmit faster and are hence more virulent. Increasing pathogen virulence is, in turn, typically assumed to be mediated by increasing ...

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 ...