Metabolism of Squamate Reptiles: Allometric and Ecological Relationships

Andrews, Robin M.; Pough, F. Harvey

doi:10.1086/physzool.58.2.30158569

Cited by 266 publications

(195 citation statements)

References 60 publications

Supporting

Mentioning

171

Contrasting

Unclassified

Order By: Relevance

“…Our estimates of scaling exponents at 207C (b p 1.33) and 247C (b p 1.23) were significantly higher than those of both adult and month-old snakes from these populations (b p 0.59 [Bronikowski and Vleck 2010]; b p 0.38-0.58 [Robert and Bronikowski 2010]). At 287C (b p 0.87) and 327C (b p 0.78), our estimates are not statistically different from the estimates from these previous studies or from the average for squamate reptiles (b p 0.80; Andrews and Pough 1985). The scaling exponent estimate at 207C is significantly greater than 1.…”

Section: Discussioncontrasting

confidence: 72%

Developmental and Immediate Thermal Environments Shape Energetic Trade-Offs, Growth Efficiency, and Metabolic Rate in Divergent Life-History Ecotypes of the Garter SnakeThamnophis elegans

Gangloff

Vleck²,

Bronikowski³

2015

Physiological and Biochemical Zoology

View full text Add to dashboard Cite

Interactions at all levels of ecology are influenced by the rate at which energy is obtained, converted, and allocated. Tradeoffs in energy allocation within individuals in turn form the basis for life-history theory. Here we describe tests of the influences of temperature, developmental environment, and genetic background on measures of growth efficiency and resting metabolic rate in an ectothermic vertebrate, the western terrestrial garter snake (Thamnophis elegans). After raising captive-born snakes from divergent life-history ecotypes on thermal regimes mimicking natural habitat differences (2 # 2 experimental design of ecotype and thermal environment), we measured oxygen consumption rate at temperatures spanning the activity range of this species. We found ecotypic differences in the reaction norms of snakes across the measured range of temperatures and a temperature-dependent allometric relationship between mass and metabolic rate predicted by the metabolic-level boundaries hypothesis. Additionally, we present evidence of within-individual trade-offs between growth efficiency and resting metabolic rate, as predicted by classic lifehistory theory. These observations help illuminate the ultimate and proximate factors that underlie variation in these interrelated physiological and life-history traits.

show abstract

Section: Discussioncontrasting

confidence: 72%

Developmental and Immediate Thermal Environments Shape Energetic Trade-Offs, Growth Efficiency, and Metabolic Rate in Divergent Life-History Ecotypes of the Garter SnakeThamnophis elegans

Gangloff

Vleck²,

Bronikowski³

2015

Physiological and Biochemical Zoology

View full text Add to dashboard Cite

show abstract

“…Analysis with a General Linear Model (GLM) indicated significant variation in BMR across reptile families (F 26, 148 = 5.13, p < 0.001), with the pattern of variation in mean family BMR very similar to that reported by Andrews and Pough (1985). Some of these families were, however, represented by data for very few taxa.…”

Section: : Estimating the Components Of The Energy Budget For Dinosaursmentioning

confidence: 62%

Dinosaur Energetics: Setting the Bounds on Feasible Physiologies and Ecologies

Clarke

2013

The American Naturalist

View full text Add to dashboard Cite

The metabolic status of dinosaurs has long been debated but remains unresolved as no consistent picture has yet emerged from a range of anatomical and isotopic evidence. Quantitative analysis of dinosaur energetics, based on general principles applicable to all vertebrates, shows that many features of dinosaur lifestyle are compatible with a physiology similar to that of extant lizards, scaled up to dinosaur body masses and temperatures. Sufficient metabolic scope would have been available to support observed dinosaur growth rates and allow considerable locomotor activity, perhaps even migration. Since at least one dinosaur lineage evolved true endothermy, this analysis emphasises that there was no single dinosaur physiology. Many small theropods were insulated with feathers and appear to have been partial or full endotherms. Uninsulated small taxa, and all juveniles, would presumably have been ectothermic, with consequent diurnal and seasonal variations in body temperature. In larger taxa inertial homeothermy would have resulted in warm and stable body temperatures, but with a basal metabolism significantly below that of living mammals or birds of the same size. It would appear that dinosaurs exhibited a range of metabolic levels to match the broad spectrum of ecological niches they occupied.

show abstract

“…1990). Adult tuatara have consistently lower mass-specific metabolic rates than the 1 year-i-and 2 year+ tuatara at corresponding temperatures, as might be expected with their larger body size (Bennett & Dawson 1976;Andrews & Pough 1985). However, the Q io value of 2.3 for adult tuatara over a 5-35°C range (Wilson & Lee 1970) was similar to that of the juveniles over the 5-20°C range.…”

Section: Effects Of Body Weight On Metabolismmentioning

confidence: 67%

The effect of temperature on the metabolism of juvenile tuatara,Sphenodon punctatus

Cartland

Grimmond

1994

New Zealand Journal of Zoology

View full text Add to dashboard Cite

Resting metabolic rates of juvenile tuatara (1-2 year old) were found to be significantly affected by ambient temperature over the range 5-22.5°C. The younger, smaller animals had higher rates of mass-specific metabolism than the older and larger juveniles, significantly so at the lower and higher experimental temperatures. There is evidence of a compensatory, temperature-independent metabolic decline in juvenile tuatara in the mid-temperature range, similar to that found in other cooltemperate reptiles. The mass-specific metabolic rates of juvenile tuatara are high when compared with a small data sample of metabolic rates for adult tuatara, but similar to those of some small New Zealand lizards.

show abstract

Metabolism of Squamate Reptiles: Allometric and Ecological Relationships

Cited by 266 publications

References 60 publications

Developmental and Immediate Thermal Environments Shape Energetic Trade-Offs, Growth Efficiency, and Metabolic Rate in Divergent Life-History Ecotypes of the Garter SnakeThamnophis elegans

Developmental and Immediate Thermal Environments Shape Energetic Trade-Offs, Growth Efficiency, and Metabolic Rate in Divergent Life-History Ecotypes of the Garter SnakeThamnophis elegans

Dinosaur Energetics: Setting the Bounds on Feasible Physiologies and Ecologies

The effect of temperature on the metabolism of juvenile tuatara,Sphenodon punctatus

Contact Info

Product

Resources

About