intraspecific allometry of standard metabolic rate in green iguanas iguana iguana to study the allometric relationship between standard metabolic rate and body mass mass range 163627 g in green iguanas iguana iguana n32 we measured rates of oxygen consumption vo2 at 30 degrees c during scotophase the relationship could be described as vo2ml h10478w0734 the resulting mass exponent was similar to the 34 power commonly used in interspecific curves p005 but differed from a proposed intraspecific value of 23 p005 the mass adjusted vo2 was higher than predicted from generalized squamate curves the mean mass exponent of intraindividual allometric equations of iguanas n7 at varying masses during ontogeny did not differ from that of the pooled equation indicating that scaling of vo2 is similar for both between and within individuals thermal acclimation compensatory changes in vo2 with prolonged exposure to a constant temperature was not observed in juvenile iguanas n11 between 1 and 5 weeks of acclimation at 30 degrees c