6 Result(s)
within
Geoffrey E. Hill
Science, Humanities and Social Sciences, multidisciplinary
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Article
Open AccessFlexibility underlies differences in mitochondrial respiratory performance between migratory and non-migratory White-crowned Sparrows (Zonotrichia leucophrys)
Migration is one of the most energy-demanding behaviors observed in birds. Mitochondria are the primary source of energy used to support these long-distance movements, yet how mitochondria meet the energetic d...
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Article
Open AccessLevels of pathogen virulence and host resistance both shape the antibody response to an emerging bacterial disease
Quantifying variation in the ability to fight infection among free-living hosts is challenging and often constrained to one or a few measures of immune activity. While such measures are typically taken to refl...
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Article
Open AccessMultiple differences in pathogen-host cell interactions following a bacterial host shift
Novel disease emergence is often associated with changes in pathogen traits that enable pathogen colonisation, persistence and transmission in the novel host environment. While understanding the mechanisms und...
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Article
Open AccessNo evidence that carotenoid pigments boost either immune or antioxidant defenses in a songbird
Dietary carotenoids have been proposed to boost immune system and antioxidant functions in vertebrate animals, but studies aimed at testing these physiological functions of carotenoids have often failed to fin...
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Article
Open AccessCarotenoid metabolism strengthens the link between feather coloration and individual quality
Thirty years of research has made carotenoid coloration a textbook example of an honest signal of individual quality, but tests of this idea are surprisingly inconsistent. Here, to investigate sources of this ...
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Article
Plumage coloration is a sexually selected indicator of male quality
FEMALE choice of mates based on the expression of characters that correlate with male quality remains a controversial and largely untested idea1. By choosing quality males, females stand to gain resources2, genet...
