First published online November 1, 2006
Journal of Experimental Biology 209, 4414-4419 (2006)
Published by The Company of Biologists 2006
doi: 10.1242/jeb.02540
Do carotenoid-based sexual traits signal the availability of non-pigmentary antioxidants?
Sophie Bertrand1,*,
Bruno Faivre2 and
Gabriele Sorci1,
1 Laboratoire de Parasitologie Evolutive, Université Pierre et Marie
Curie, CNRS UMR 7103, quai St Bernard, 75252 Paris cedex 05, France
2 Université de Bourgogne, UMR CNRS 5561 BioGéoSciences,
Equipe Ecologie Evolutive, 6 Blvd Gabriel, 21000 Dijon, France

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Fig. 1. Changes in body mass (g) for male zebra finches of different
supplementation groups. Values are means ± s.e.m. (N=40).
Changes were computed as the differences between the final and initial body
masses for each group.
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Fig. 2. Changes in plasma carotenoids (µg ml-1) in male zebra finches
of different supplementation groups. Values are means ± s.e.m.
(N=40). Changes were computed as the differences between the final
and the initial values of plasma carotenoids for each group.
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Fig. 3. Changes in bill colour scores of male zebra finches of different
supplementation groups. Values are means ± s.e.m. (N=40).
Changes were computed as the differences between the final and the initial
values of bill colour scores for each group.
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© The Company of Biologists Ltd 2006