First published online November 30, 2007
Journal of Experimental Biology 210, 4368-4378 (2007)
Published by The Company of Biologists 2007
doi: 10.1242/jeb.007104
Physiological, morphological and behavioural effects of selecting zebra finches for divergent levels of corticosterone
M. L. Roberts1,*,
K. L. Buchanan2,
D. Hasselquist3,
A. T. D. Bennett4 and
M. R. Evans1
1 Centre for Ecology and Conservation, School of Biosciences, University of
Exeter, Cornwall Campus, Penryn, Cornwall TR10 9EZ, UK
2 School of Biosciences, Main Building, Park Place, Cardiff University,
Cardiff CF10 3TL, UK
3 Department of Animal Ecology, Lund University, Ecology Building,
Sölvegatan 37, 22362 Lund, Sweden
4 School of Biological Sciences, Woodland Road, University of Bristol,
Bristol BS8 1UG, UK

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Fig. 1. Mean peak corticosterone (CORT) titres of zebra finches used in immunity
and dominance experiments (F5) and in spectrophotometric comparisons (F4)
according to selection line (± s.e.m.). Sample sizes are shown above
the bars.
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Fig. 2. Relationship between mean wing web swelling 24 h post injection of PHA and
peak CORT titre. Grey squares with dashed trendline represent females; black
circles and solid trendline represent males.
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Fig. 3. Mean wing web swelling 24 h post injection of PHA of F5 males according to
CORT selection line (± s.e.m.).
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Fig. 7. Coefficients of the first three principal components (PCs) of the leg
region plotted against wavelength.
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Fig. 10. Mean tarsus length of zebra finches from the F4 and F5 generations of
selection according to selection line (± s.e.m.).
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© The Company of Biologists Ltd 2007