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First published online May 13, 2004
Journal of Experimental Biology 207, 2095-2099 (2004)
Published by The Company of Biologists 2004
doi: 10.1242/jeb.00998

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The effect of mycoplasmosis on carotenoid plumage coloration in male house finches

Geoffrey E. Hill^*, Kristy L. Farmer and Michelle L. Beck

Department of Biological Sciences, 331 Funchess Hall, Auburn University, Auburn, Alabama 36849, USA

View larger version (11K): [in a new window]   Fig. 1. The effects of Mycoplasma gallicepticum (MG) infection on expression of carotenoid plumage coloration in male house finches. Plotted as horizontal lines are the median and 10th, 25th, 75th and 90th percentiles of the hue, saturation and brightness. Comparisons were made with the mean color of the crown, breast and rump feathers for each male following molt within experimental treatment group. Infected males all had conjunctivitis during the molt period. Uninfected males tested negative for MG both in antibody tests and PCR tests at capture and were held in a quarantine facility away from sources of MG during molt. All birds were fed a low-carotenoid pellet diet and water supplemented with tangerine juice as a source of carotenoid pigments.