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Fig. 8. Do nectarivorous birds have different diurnal glomerular filtration rates (GFRs) compared with equal-sized birds with other dietary habits? (A) Phylogeny of avian species with GFR data (Table 1). (B) The relationship between body mass (Mb; g) and GFR (ml h–1) was described by a power function with an exponent equal to 0.74±0.26 (N=28). (C) The phylogenetically independent contrasts between log10(Mb) and log10(GFR) for nectarivorous birds (filled circles) are within the 95% confidence interval (represented by the broken lines) of the regression line relating the standardized contrasts of log10(Mb) and log10(GFR) for species with other dietary habits. The exponent of this phylogenetically corrected relationship equals 0.72±0.10 (N=23).





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