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Fig. 2. A response surface describing mass-specific O2 consumption rate
(
O2) as a
function of body mass and PO2 based on data
from 35 oscars ranging in mass from 8.8 to 308 g. The model is:
log
O2=3.20686+0.786xlog(mass)0.88913x0.96371PO2
(0.050.3 kg fish) (r2=0.948);
log
O2=3.28076+0.786xlog(mass)0.92331x0.97024PO2
(0.010.05 kg fish) (r2=0.928), where
O2 is in µmol
O2 h1, mass is in kg, and
PO2 is in mmHg.