scholarly journals Metabolomics of aerobic metabolism in mice selected for increased maximal metabolic rate

2011 ◽  
Vol 6 (4) ◽  
pp. 399-405 ◽  
Author(s):  
Bernard Wone ◽  
Edward R. Donovan ◽  
Jack P. Hayes
Keyword(s):  
Metabolic Rate ◽  
Aerobic Metabolism ◽  
Maximal Metabolic Rate

Metabolism during normoxia, hyperoxia, and recovery in newborn rats

1992 ◽  
Vol 70 (3) ◽  
pp. 408-411 ◽  
Author(s):  
Peter B. Frappell ◽  
Andrea Dotta ◽  
Jacopo P. Mortola
Keyword(s):  
Carbon Dioxide ◽  
Oxygen Consumption ◽  
Metabolic Rate ◽  
Carbon Dioxide Production ◽  
Oxygen Availability ◽  
Aerobic Metabolism ◽  
Newborn Rats ◽  
Ambient Temperatures ◽  
Positive Effects

Aerobic metabolism (oxygen consumption, [Formula: see text], and carbon dioxide production, [Formula: see text]) has been measured in newborn rats at 2 days of age during normoxia, 30 min of hyperoxia (100% O2) and an additional 30 min of recovery in normoxia at ambient temperatures of 35 °C (thermoneutrality) or 30 °C. In normoxia, at 30 °C [Formula: see text] was higher than at 35 °C. With hyperoxia, [Formula: see text] increased in all cases, but more so at 30 °C (+20%) than at 35 °C (+9%). Upon return to normoxia, metabolism readily returned to the prehyperoxic value. The results support the concept that the normoxic metabolic rate of the newborn can be limited by the availability of oxygen. At temperatures below thermoneutrality the higher metabolic needs aggravate the limitation in oxygen availability, and the positive effects of hyperoxia on [Formula: see text] are therefore more apparent.Key words: neonatal respiration, oxygen consumption, thermoregulation.

Mass‐independent maximal metabolic rate predicts geographic range size of placental mammals

2018 ◽  
Vol 32 (5) ◽  
pp. 1194-1202
Author(s):  
Jack P. Hayes ◽  
Chris R. Feldman ◽  
Miguel B. Araújo
Keyword(s):  
Metabolic Rate ◽  
Geographic Range ◽  
Range Size ◽  
Geographic Range Size ◽  
Maximal Metabolic Rate

Bioenergetics and stellar luminosities

2017 ◽  
Vol 18 (3) ◽  
pp. 211-212
Author(s):  
C Sivaram ◽  
K Arun ◽  
O V Kiren
Keyword(s):  
Metabolic Rate ◽  
Unit Mass ◽  
Infrared Galaxies ◽  
X Ray ◽  
Luminous Infrared Galaxies ◽  
Maximal Metabolic Rate ◽  
Luminous Objects ◽  
The Universe

AbstractWe draw attention to a curious coincidence wherein the most (steadily emitting) luminous objects in the Universe from stellar X-ray sources to ultra-luminous quasars and Ultra Luminous Infrared Galaxies, steadily emit a power per unit mass, which is just the same value as the maximal metabolic rate in (warm-blooded) bio-organisms.

Speeding up Growth: Selection for Mass-Independent Maximal Metabolic Rate Alters Growth Rates

2016 ◽  
Vol 187 (3) ◽  
pp. 295-307 ◽  
Author(s):  
Cynthia J. Downs ◽  
Jessi L. Brown ◽  
Bernard W. M. Wone ◽  
Edward R. Donovan ◽  
Jack P. Hayes
Keyword(s):  
Metabolic Rate ◽  
Growth Rates ◽  
Growth Selection ◽  
Maximal Metabolic Rate ◽  
Selection For

Kinematics, maximal metabolic rate, sprint and endurance for a slow-moving lizard, the thorny devil (Moloch horridus)

2004 ◽  
Vol 52 (5) ◽  
pp. 487 ◽  
Author(s):  
Christofer J. Clemente ◽  
Graham G. Thompson ◽  
Philip C. Withers ◽  
David Lloyd
Keyword(s):  
Metabolic Rate ◽  
Activity Patterns ◽  
Pulmonary Ventilation ◽  
Lung Ventilation ◽  
Metabolic Physiology ◽  
Performance Traits ◽  
Phrynosoma Platyrhinos ◽  
Locomotory Performance ◽  
Slow Moving ◽  
Maximal Metabolic Rate

Metabolic physiology, morphology, activity patterns, performance traits and movement kinematics are thought to have coevolved in lizards. We examined links between these parameters for the thorny devil (Moloch horridus), a morphologically and ecologically specialised agamid lizard (body mass ~30 g). It has a maximum sustainable metabolic rate (VO2max) of 0.99 mL O2 g–1 h–1 while running at a velocity of 0.11�m�sec–1 at 35°C. This VO2 is typical of that for other lizards (except varanids), but its burst speed (1.21�m�sec–1) is slower than for a typical agamid (e.g. Ctenophorus ornatus at 3.59 m sec–1) and its endurance is appreciably higher. The kinematic pattern of hind-limb movement for M. horridus is different to that of a 'typical' similar-sized agamid, Ctenophorus ornatus, which is a fast-moving lizard that shelters in rock crevices. It is also different to the ecologically equivalent Phrynosoma platyrhinos. The slow and erratic ventilation of M. horridus (2.3 breaths min–1) at its maximum sustainable aerobic running speed occurs when it stops running. This might be a consequence of the hypaxial muscles being used for both lung ventilation and locomotion, which might be impairing pulmonary ventilation when running, but might also contribute to its high endurance. M. horridus is metabolically typical of agamids, but its body shape, movement patterns and locomotory performance traits are different, and might have coevolved with its specialisation for eating ants.

Effects of Selection for Mass-Independent Maximal Metabolic Rate on Food Consumption

2020 ◽  
Vol 93 (1) ◽  
pp. 23-36
Author(s):  
Cynthia J. Downs ◽  
Jessi L. Brown ◽  
Bernard W. M. Wone ◽  
Edward R. Donovan ◽  
Jack P. Hayes
Keyword(s):  
Metabolic Rate ◽  
Food Consumption ◽  
Maximal Metabolic Rate ◽  
Selection For

Allometric scaling of maximal metabolic rate in mammals: muscle aerobic capacity as determinant factor

2004 ◽  
Vol 140 (2) ◽  
pp. 115-132 ◽  
Author(s):  
Ewald R. Weibel ◽  
Leonardo D. Bacigalupe ◽  
Beat Schmitt ◽  
Hans Hoppeler
Keyword(s):  
Metabolic Rate ◽  
Aerobic Capacity ◽  
Allometric Scaling ◽  
Maximal Metabolic Rate ◽  
Determinant Factor

scholarly journals Metabolic rates of aggressive/submissive phenotypes are colour blind in the polymorphic Gouldian finch

2021 ◽  
Author(s):  
William A. Buttemer ◽  
Vincent Careau ◽  
Mark A. Chappell ◽  
Simon C. Griffith
Keyword(s):  
Metabolic Rate ◽  
Resting Metabolic Rate ◽  
Social Rank ◽  
First Year ◽  
Metabolic Rates ◽  
Maximal Metabolic Rate ◽  
Gouldian Finch ◽  
Exercise Induced ◽  
Colour Morphs ◽  
Metabolic Indices

Evidence from a number of species suggests behaviours associated with social rank are positively correlated with metabolic rate. These studies, however, are based on metabolic measurements of isolated individuals, thereby ignoring potential effects of social interactions on metabolic rates. Here, we characterised three pertinent metabolic indices in the two predominant genetic colour morphs of the Gouldian finch (Erythrura gouldiae): diurnal resting metabolic rate (RMR), nocturnal basal metabolic rate (BMR), and exercise-induced maximal metabolic rate (MMR). Research reveals red-headed morphs consistently dominate the less aggressive black-headed morphs and the two morphs to differ in other behavioural and physiological traits. We measured daytime RMR of intermorph naïve birds (first-year virgin males maintained in total isolation from opposite colour morphs) and their metabolic responses to viewing a socially unfamiliar bird of each colour. Subsequently each bird was placed in a home cage with an opposite colour morph (intermorph exposed) and the series of measurements repeated. Daytime RMR was indistinguishable between the two morphs, whether intermorph naïve or intermorph exposed. However, both red- and black-headed birds showed a greater short-term increase in metabolic rate when viewing an unfamiliar red-headed bird than when seeing a black-headed bird, but only when intermorph naïve. Measurements of BMR and exercise-induced MMR did not differ between the two morphs, and consequently aerobic scope was indistinguishable between them. We propose that the suite of behavioural differences between these two sympatric morphs are functionally complementary and represent evolutionary stable strategies permitting establishment of dominance status in the absence of metabolic costs.

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