Relationships between body length and mass, fat, and true body condition measures for male and female Burmese pythons.

We estimated the probability that the slope is not zero (i.e., p ≤ 0.05) and calculated the r2 values from SMA regressions of log-transformed body mass and log-transformed wet-fat mass on log-transformed snout-vent length (SVL) and from OLS regressions of percent fat, scaled fat, and residual fat on log-transformed SVL. Ideally, measures of true body condition will have no relationship with body length (i.e., percent fat, scaled fat, and residual fat should have non-significant regression slopes and r2 values of zero), but each of them do. These results are visualized in Fig 1.