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Figure 1


Fig. 1. Change in: (A) food intake (g h–1), (B) body mass (g), (C) plasma carotenoid levels (µg ml–1) and (D) bill colour over the course of the experiment for the four experimental groups (carotenoid-supplemented vs non-supplemented males and cold-exposed vs warm-exposed males). Values are means ± s.e.m. (N=23 for all bars except 6°C carotenoid supplemented, where N=24).