... respiratory efficiency. Plumage coloration Shared pathway hypothesis Captivity effects Ketocarotenoids Respiratory control ratio National Science Foundation http://dx.doi.org/10.13039/100000001 NSF-IOS-2037741 NSF-IOS-2224556 NSF-IOS-2037739 NSF-IOS-2037735 In many species...

... redundancy Plumage coloration Polyenes Psittacofulvin Raman spectroscopy Virtually all organisms have evolved pigmentation based on melanins, mainly owing to the benefits derived from their broadband absorbance properties and capacity to protect cells against the damaging effects of solar...

... tree swallows ( Tachycineta bicolor ) to determine whether plumage reflectance is related to adult or offspring immune responses. We simultaneously addressed the influence of blood selenium levels and the interaction between blood selenium and plumage coloration on adult and nestling immunity. Selenium...

... is required for development of eumelanin plumage coloration and that such a low GSH level is also potentially dangerous for the organism. Carotenoid supplementation increased plasma carotenoid levels and chroma of the yellow parts of the feathers grown during the experiment. However, carotenoid...

...Geoffrey E. Hill; Kristy L. Farmer; Michelle L. Beck SUMMARY Parasites are widely assumed to cause reduced expression of ornamental plumage coloration, but few experimental studies have tested this hypothesis. We captured young male house finches Carpodacus mexicanus in Alabama before fall molt...