Figure 2. The relationship between the metabolic scaling slopeb and log10 metabolic level L within
species of ectothermic vertebrates. Left panels show measurements in
inactive animals of water- (A ) and air-breathing (B )
species, where lines join measurements made at different temperatures of
single experiments in the same species. Right panels show values for
animals under different activity levels of water- (C ) and
air-breathing (D ) species, where lines join measurements made
at a single temperature and species (temperature of treatments is
indicated by colour). Inset plots show
posterior kernel density
estimates of the effect of log10 L on b(βL) for each group (water- or air-breathers), with
means (dots) and 95% credible intervals (horizontal bars and shaded
areas) from Bayesian models (see Table 1). Experimental temperature (T)
is shown by a colour scale, and dashed horizontal lines indicate the
typical metabolic scaling boundaries under the MLBH.