... plasticity during hypoxia–reoxygenation stress when acclimated to low salinity, contributing to its ecological and invasive success in varying environments. Hypoxia tolerance Mitochondria Aerobic capacity High-resolution respirometry Oxidative stress marker AmplexRed Deutsche...

... is often used as a proxy for endurance; however, evidence from endurance and exertion trials indicates that they are in fact not consistently related in lizards. Locomotor capacity Aerobic capacity Anaerobic capacity Exercise training Locomotion Performance Locomotor capacities are key...

... for its hypoxia tolerance associated with metabolic rate depression, yet the mechanisms that sustain mitochondrial function during oxygen fluctuations are not well understood. We used top-down metabolic control analysis (MCA) to determine aerobic capacity and control over oxygen flux in the mitochondria...

... (which are mainly active foragers) have relatively high maximal aerobic capacity during forced exercise ( V̇ O 2 ,max V̇ O 2 ,max ), whereas viviparous species have relatively low V̇ O 2 ,max V̇ O 2 ,max . Aerobic capacity Allometry Comparative method Evolutionary physiology Metabolism...

...Kang Nian Yap; Morag F. Dick; Christopher G. Guglielmo; Tony D. Williams ABSTRACT Despite widely held assumptions that hematocrit (Hct) is a key determinant of aerobic capacity and exercise performance, this relationship has not often been tested rigorously in birds and results to date are mixed...

... of multiple stressors (such as salinity stress and wave action) on bioenergetics and burrowing performance of marine bioturbators are not well understood. We investigated the effects of mechanical disturbance and salinity stress on the burrowing behavior, aerobic capacity and energy expense of digging...

... characteristics remain unaffected. Myodes glareolus Aerobic capacity Artificial selection Fibre types Gastrocnemius Locomotor performance The maximum rate of aerobic exercise metabolism is a trait of special interest from both medical and evolutionary–comparative perspectives, because...

...Marie-Pierre Schippers; Christophe M. R. LeMoine; Grant B. McClelland Fuel selection patterns during exercise are thought to be conserved among sea-level native mammals when intensity is expressed relative to maximum aerobic capacity ( ). However, this claim is based on data from only a few species...

... The authors declare no competing financial interests. © 2014. Published by The Company of Biologists Ltd 2014 Thermoregulation Locomotion Metabolism Heat production Aerobic capacity The advantages that have led to the evolution of an endothermic physiology are still under debate...

...Koa N. Webster; Terence J. Dawson SUMMARY We examined the structure–function relationships that underlie the aerobic capacities of marsupial mammals that hop. Marsupials have relatively low basal metabolic rates (BMR) and historically were seen as ‘low energy’ mammals. However, the red kangaroo...

... wheels have obtained PMR values that were ~10 times higher than BMR. In the present study, PMR values were only approximately six times higher than SMR values. However, the former studies used wild-caught birds, not hand-reared birds, and prolonged periods of captivity can decrease aerobic capacity...

...Mark A. Chappell; Jean-Francois Savard; Jennifer Siani; Seth W. Coleman; Jason Keagy; Gerald Borgia SUMMARY Individual variation in aerobic capacity has been extensively studied, especially with respect to condition, maturity or pathogen infection, and to gain insights into mechanistic foundations...

...Andrzej K. Gębczyński; Marek Konarzewski SUMMARY According to the aerobic capacity model of the evolution of endothermy,high levels of basal/resting metabolic rate (BMR/RMR) underlying endothermy have evolved as a correlated response to selection for high rates of aerobic metabolism ( V O 2 max...

... differences in altitude do not necessarily result in differences in aerobic capacity in small mammals and, even if V̇ O 2 ,max is reduced at high altitude, there may be no effect on voluntary running behavior. References Bartholomew, G. A., Vleck, D. and Vleck, C. M. ( 1981 ). Instantaneous measurements...

..., to be on the order of 6-10 for normal species and 10-60 for athletic species; it also increases with body mass, particularly in athletic species where it scales in proportion to M b 0.18 . The fAS is therefore related both to body mass and to aerobic capacity, and the range is greater in large than small mammals...

... time) had high resting metabolism, which suggests a cost of having high capacity or propensity for activity. * Author for correspondence (e-mail: [email protected] ) 26 7 2004 © The Company of Biologists Limited 2004 2004 aerobic capacity deer mouse exercise locomotion...

... in the past the marsupials were considered to be metabolically `primitive', the red kangaroo Macropus rufus has been reported to have an aerobic capacity ( V̇ O 2 max )comparable to that of the most `athletic' of placentals such as dogs. However,kangaroos travel at moderate speeds with lower relative cost...

...Jason P. Odell; Mark A. Chappell; Kathryn A. Dickson SUMMARY We examined the mechanistic basis for two whole-animal performance traits,aerobic capacity and burst speed, in six laboratory-reared Trinidadian guppy populations from different native drainages with contrasting levels of predation. Using...

... other actively swimming shark species. The metabolic enzymes measured were citrate synthase(CS), an index of aerobic capacity, and lactate dehydrogenase (LDH), an index of anaerobic capacity. WM creatine phosphokinase (CPK) activity, an index of rapid ATP production during burst swimming, was also...

... aerobic capacity appears to be less than that of tuna RM. * Author for correspondence at present address: Department of Zoology, Weber State University, Ogden, UT 84408-2505, USA (e-mail: [email protected] ) 8 5 2003 © The Company of Biologists Limited 2003 2003 lamnid shark tuna...