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Fig. 5. Relationship between the rate of appearance of glycerol
(Ra glycerol=lipolytic rate) and body mass for resting
mammals (open squares), exercising mammals (filled squares), resting penguins
(triangles) and ruff sandpipers (filled circle). The mean value plotted here
for ruff sandpipers is for shivering birds (note that the mean value for
non-shivering birds was even higher, although not significantly so; see
Table 1). Each point is the
mean value from a different study [rat
(Kalderon et al., 2000;
McClelland et al., 2001),
rabbit (Himms-Hagen, 1968;
Reidy and Weber, 2002), dog
(Issekutz et al., 1975;
Shaw et al., 1975), pigmy goat
(Weber et al., 1993), sheep
(Bergman, 1968), human
(Bahr et al., 1990;
Mora-Rodriguez et al., 2001;
Wolfe et al., 1990) and king
penguin (Bernard et al., 2002a;
Bernard et al., 2002b;
Bernard et al., 2003)]. Lines
were fitted by linear regression for resting mammals (broken line;
y=–0.31x+21.8; r2=0.333) and
exercising mammals (solid line; y=–0.34x+28.8;
r2=0.390). Curved dotted lines indicate 95% confidence
limits around the values for exercising mammals.
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