.... The energetic cost associated with burrowing is great and, in part, explains why subterranean species often maintain their burrows and tunnels across generations. Indeed, the digging metabolic rate of five African mole-rat has been determined to be between three and five times higher than...

... approach we examined in vivo metabolic rate and cardiac mitochondrial respiration in the Rhône streber, during and after a heat stress on a precise time line. The temperature was raised from 13°C to 18°C (+1°C per hour) and maintained at 18°C for 5 days, before returning to 13°C at the same rate. We...

... that nestlings of warmer nests had lighter bodies and smaller beaks at fledging. Despite the fact that there was no effect of environmental temperature on cellular metabolic rate, mitochondria had a higher inefficiency in coupling metabolism to allocable energy production, as evidenced by bioenergetic...

... a solid framework to understand movement energetics from the perspective of force and work requirements. Whilst such models are highly informative, they lack specificity for predicting absolute metabolic rates across a range of species or variations in movement patterns. Muscles consume energy when...

... Metabolic rate The aerial environment profoundly impacts the energy required to fly and the speed at which animals cover ground (Tucker, 1966 ; Furness and Bryant, 1996 ; Chapman et al., 2011). Animals adjust their behaviour accordingly by, for example, modifying their flight routes, timings...

... metabolic rate and aerobic scope at both temperatures and disproportionally benefited larger fish at 25°C as the scaling exponent for aerobic scope was reestablished to the same level as at 17°C (b =0.86). This suggests that hyperoxia may provide metabolic refuge for larger individuals, allowing them...

.... A theoretical model of the relationship between metabolic rate during torpor and ambient temperature has been proposed. Nevertheless, no empirical attempts have been made to assess the model predictions under different climates. Using open-flow respirometry, we evaluated the ambient temperature at which bats...

... metabolic rate. These differences in brain respiration and brain mass were, in turn, associated with cognitive differences, such that bees with larger brains were fast cognitive phenotypes whereas those with smaller brains were slow cognitive phenotypes. We discuss these results in the context of the role...

... respiration were measured. Hypoxia-exposed fish had higher aerobic scope, maximum metabolic rate, and higher liver mitochondrial efficiency relative to control fish in normoxia. Interestingly, hypoxia-exposed fish showed increased hypoxia sensitivity (higher P crit) and recruited burst swimming at lower swim...

.... Summary: Experimental evidence shows that two stimuli triggering a metabolic (temperature decrease) or glucocorticoid (restraint) response caused comparable increases in plasma glucocorticoids and glucose. Glucocorticoids Energy expenditure Stress response Metabolic rate Sturnus unicolor...

... blood flow but experience similar arteriosclerosis levels as males, they will have disproportionately impaired aerobic performance. To test this hypothesis, we measured resting (RMR) and maximum metabolic rate (MMR), aerobic scope (AS) and acute upper thermal tolerance in coho salmon (Oncorhynchus...

...Sara M. Wilmsen; Edward M. Dzialowski ABSTRACT Endothermic, flying insects are capable of some of the highest recorded metabolic rates. This high aerobic demand is made possible by the insect's tracheal system, which supplies the flight muscles with oxygen. Many studies focus on metabolic responses...

...Cody K. Porter; Kevin M. Cortes; Ofir Levy; Eric A. Riddell ABSTRACT Scholander–Irving curves describe the relationship between ambient temperature and metabolic rate and are fundamental to understanding the energetic demands of homeothermy. However, Scholander–Irving curves are typically measured...

...Jordan R. Glass; Jon F. Harrison ABSTRACT While multiple studies have shown that honey bees and some other flying insects lower their flight metabolic rates when flying at high air temperatures, critics have suggested such patterns result from poor experimental methods as, theoretically, air...

... consumption during surface rest and submerged swimming by trained beluga whales, and compared these measurements with those of a commonly studied odontocete, the Atlantic bottlenose dolphin (Tursiops truncatus). Both resting metabolic rate (3012±126.0 kJ h −1) and total cost of transport (1.4±0.1 J kg −1 m −1...

... in reproductive performance is due to an age-related decrease of heat dissipation capacity and (2) the limiting mechanism is more severe in animals with high metabolic rates. We used bank voles (Myodes glareolus) from lines selected for high swim-induced aerobic metabolic rate, which have also increased basal...

.... Bird Development Evaporative cooling Extreme weather event Metabolic rate Thermoregulation Vetenskapsrådet http://dx.doi.org/10.13039/501100004359 2020-04686 Crafoordska Stiftelsen http://dx.doi.org/10.13039/501100003173 20211007 20221018 Kungliga...

... physiology are not significant drivers of winter dormancy in cunner. In fact, compensatory plasticity at frigid temperatures is conserved, even in dormant fish. Metabolic rate Burst swimming Aerobic scope Acclimation Hibernation Temperature Winter Fish Natural Sciences and Engineering...

... of freshwater insects, one snail and two crustaceans. Consistent with available literature, we found a clear decrease in Ṁ O 2 with increasing salinity in the snail Elimia sp. and crustaceans Hyalella azteca and Gammarus pulex (r 5 =−0.90, P =0.03). However, we show here for the first time that metabolic rate...

...Tanya S. Prinzing; Jennifer S. Bigman; Zachary R. Skelton; Nicholas K. Dulvy; Nicholas C. Wegner ABSTRACT The gill surface area of aquatic ectotherms is thought to be closely linked to the ontogenetic scaling of metabolic rate, a relationship that is often used to explain and predict ecological...