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Figure 2


Fig. 2. Daily body mass losses and derived metabolic rates of isolated, loosely grouped and free-ranging male emperor penguins during winter (April to July). Mean daily body mass losses were calculated from published studies (Prévost, 1961; Prévost and Sapin-Jaloustre, 1964; Ancel et al., 1997). Estimated mean metabolic rates were calculated from the mean daily body mass loss applying Groscolas's method (Groscolas, 1988) and Ancel et al.'s results (Ancel et al., 1997).





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