Fig. 2. In the group of genera with accelerated evolution of cytochrome b
exceptional longevity and the lifetime expenditure of energy are strong
functions of the rate of evolution of cytochrome b. Data are from
Table S2 in supplementary material. The genera with high Scytb values (the
upper quadrant, Scytb>0.1345) are indicated by open symbols; the genera
with the low Scytb values (the lowest quadrant, Scytb<0.069) are indicated
by solid symbols. When the linear regression was not significant the
regression line was omitted. (A) Exceptional longevity as a function of Scytb.
The ratio of observed longevity (Lo) to predicted
longevity (Lp),
Lo/Lp, is derived from the residuals
of the linear regressions (solid curves) of the Neognathae clade shown in
Fig. 1C,D. The squares indicate
the residuals from L(BMRw)
(Fig. 1D) and the circles
indicate the residuals from L(M)
(Fig. 1C). For the high Scytb
group,
Lo/Lp(M)=–7.068+57.5xScytb
(N=15, r2=0.605, P<0.001) and
Lo/Lp(BMRw)=–7.258+58.7xScytb
(N=15, r2=0.618, P<0.001). For the
low Scytb group,
Lo/Lp(M)=0.869+6.8xScytb
(N=15, r2=0.013, P=0.689), and
Lo/Lp(BMRw)=0.347+16.6xScytb
(N=15, r2=0.06, P=0.371). For the whole
clade,
Lo/Lp(M)=1.02+0.55xScytb
(N=59, r2=0.0021, P=0.731) and
Lo/Lp(BMRw)=1.13–0.419xScytb
(N=59, r2=0.001, P=0.804). (B) Lifetime
energy expenditure as a function of body mass. The linear regression for the
high Scytb group is LxBMRw=153+15xlnM
(N=15, r2=0.004, P=0.854). The linear
regression for the low Scytb group is
LxBMRw=250–19xlnM
(N=15, r2=0.436, P=0.007). For the whole
clade, LxBMRw=218–17.2xlnM
(N=59, r2=0.217, P<0.001). The
correct value of lifetime expenditure of energy can be obtained by multiplying
LxBMRw by 31 536 000 (the number of seconds in one
year). (C) Lifetime expenditure of energy as a function of Scytb. For the high
Scytb group, LxBMRw=–488+9612xScytb
(N=15, r2=0.579, P<0.001). For the
low Scytb group, LxBMRw=155–514xScytb
(N=15, r2=0.0026, P=0.857). For the
whole clade, LxBMRw=39.3+982xScytb
(N=59, r2=0.206, P<0.001).