Developmental stage does not affect resting metabolic rate in the monitor lizard, Varanus salvator

in Animal Biology
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Abstract

We have studied resting metabolic rate (RMR) of the water monitor lizard (Varanus salvator) at different developmental stages (hatchling, juvenile and adult) to test whether individuals at different ages differ in RMR when controlling for the effects of body mass. We found that: 1) resting metabolic rates of hatchlings, juveniles and adults were all positively related to their body mass with the same coefficients and that 2) developmental stage had a non-significant influence on the resting metabolic rate when controlling for the effects of body mass. Our results suggest that variation in resting metabolic rate for V. salvator is directly caused by body mass differences, which conforms to previous findings in mammal species and birds.

Developmental stage does not affect resting metabolic rate in the monitor lizard, Varanus salvator

in Animal Biology

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Figures

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    Comparison of metabolic rate for varanid lizards.

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    Values,expressed as mean ± SE and range, for resting metabolic rate of V. salvator (hatchling, juvenile and adult) at 28°C.

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    Linear regression of RMR and body mass in V. salvator. The dashed line indicates the regression for the combined data, the solid line the regression for the adult data.

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    Regression line of mass-specific RMR and body mass in V. salvator.

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