First published online December 1, 2006
Journal of Experimental Biology 209, 4957-4965 (2006)
Published by The Company of Biologists 2006
doi: 10.1242/jeb.02610
Corticosterone selectively decreases humoral immunity in female eiders during incubation
Sophie Bourgeon* and
Thierry Raclot
Institut Pluridisciplinaire Hubert Curien (IPHC), Département
Ecologie, Physiologie et Ethologie (DEPE), UMR 7178 CNRS-ULP, 23 rue
Becquerel, F-67087 Strasbourg Cedex 2, France

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Fig. 1. Effects of treatment on wing-web swelling in female eiders: corticosterone
implanted (hatched bars), sham implanted (open bars), and `late fasting'
females (cross hatched bars). Values are means ± s.e.m. a,b indicate a
significant difference between groups (LSD post-hoc tests).
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Fig. 2. Effects of treatment on immunoglobulin level before (hatched bars) and
after (open bars) manipulation in female eiders. Values are means ±
s.e.m. a-d indicate a significant difference between groups (LSD
post-hoc tests).
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Fig. 3. Relationship between corticosterone level and immunoglobulin level before
implantation in female eiders sampled near the end of incubation.
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© The Company of Biologists Ltd 2006