The effect of log body mass on log daily energy expenditure (DEE) (a), log resting metabolic rate (RMR) (b) and log maximum lifespan potential (MLSP) (c). an = 130, log DEE = 2.38 + 0.658 log body mass, r2 = 0.92, F = 1,468.57, P < 0.001; reduced major axis RMA gradient = 0.686. bn = 459, log RMR = 1.44 + 0.643 log body mass, r2 = 0.936, F = 67,20.46, P < 0.001, RMA gradient = 0.665. cn = 346, log MLSP = 7.67 + 0.206 log body mass, r2 = 0.478, F = 315.27, P < 0.001