Field energetics of a large carnivorous lizard, Varanus rosenbergi.

摘要: Field metabolic rates (FMRs; CO2 production) and water influx of Varanus rosenbergi were measured seasonally by means doubly-labelled (3H2 18O). Metabolic influexes highest in summer (0.18 ml g−1 h−1 17.9 H2O kg−1 day−1) lowest winter (0.04 6.5 day−1). FMRs fluxes intermediate spring. It is estimated that a 1-kg V. would need to consume 4.7 kg prey each year remain energy balance the commitment egg production requires 40% increase food acquisition gravid female late spring early summer. calculated influxes are totally provided from but other seasons, particularly winter, pulmocutaneous exchange and/or drinking significant avenues intake.