... supplementary thyroid hormones (THs) or the inhibitor methimazole during lactation at 21 or 32.5°C, and measured food intake, resting metabolic rate (RMR), milk energy output (MEO), serum THs and mammary gland gene expression of females, and litter size and mass of their offspring. Lactating females developed...

... in resting metabolic rate (RMR) for Weddell seal pups ( n =8) in air and water from one to seven weeks of age, using open-flow respirometry. Concurrently, we collected molt, morphometric and dive behavior data. Absolute metabolic rate (MR) in air followed the expected allometric relationship with mass...

... ). Understanding the evolution and stability of the G-matrix . Evolution 62 , 2451 - 2461 . 10.1111/j.1558-5646.2008.00472.x Arnold , P. A. , Delean , S. , Cassey , P. and White , C. R. ( 2021 ). Meta-analysis reveals that resting metabolic rate is not consistently related...

... of discrete severities. The costs and consequences of the immune response were assessed through comparisons of change in resting metabolic rate (RMR), energy metabolites (glucose, glycerol, triglycerides), innate immunity (bactericidal ability), sprint speed and oxidative status (antioxidant capacity...

... that the emission of contact calls significantly increases oxygen consumption; vocal individuals spent, on average, 12.42 kJ more during social signaling trials than they spent during silent trials. We also found that as resting metabolic rate increased in males, there was a decreasing probability that they would...

... and the modulation of immune function during pregnancy in a non-mammalian vertebrate, we elicited an immune response in pregnant and non-pregnant pygmy rattlesnakes, Sistrurus miliarius , using lipopolysaccharide (LPS). Resting metabolic rate (RMR) was measured using flow-through respirometry. Immune function...

.... Pairwise ANCOVA tests of resting metabolic rate of female Argiope keyserlingi ( N =15) in response to predator (praying mantis) and non-predator (eucalyptus) cues Fig. 4. Metabolic rate of female orb-web spiders. Mean (±s.e.) CO 2 production by A. keyserlingi ( N =15) over the course...

... ecology. Energy is a fundamental currency to quantify these costs, as energetic trade-offs often exist between key fitness-related processes. Daily energy expenditure (DEE) comprises of resting metabolic rate (RMR) and energy available for activity, which are linked via the energy management strategy...

... to litter size at different ambient temperatures. Golden hamsters reach 8–10 times resting metabolic rate when raising offspring under cold conditions, which is compatible with the findings from laboratory mice and other rodents. Fig. 1. Time courses of female body mass, gross energy intake...

... kennicottii ), which occupy the Sonoran Desert of southwestern North America, an area of extreme heat and aridity. We exposed wild-caught birds to progressively increasing air temperatures ( T a ) and measured resting metabolic rate (RMR), evaporative water loss (EWL), body temperature ( T b ) and heat...

... in resting metabolic rate above clearly defined upper critical limits of thermoneutrality and increases in evaporative water loss to levels equivalent to 700–1000% of baseline rates at thermoneutral T a . Maximum cooling capacity, quantified as the fraction of metabolic heat production dissipated...

... that is mediated by low rates of resting metabolism and a very efficient evaporative process that uses a gular flutter mechanism. Caprimulgiformes Hyperthermia Respirometry Evaporative water loss Resting metabolic rate Heat tolerance limit Birds inhabiting hot subtropical deserts face...

... measurements in seven Sonoran Desert passerine bird species show that heat tolerance limits did not scale with body mass among species, but were ∼50°C for all species. Evaporative water loss Resting metabolic rate Upper critical temperature Body temperature Heat tolerance limit Passerines...

... torquatus ; ∼86 g) and apostlebird ( Struthidea cinerea ; ∼118 g). At air temperatures ( T a ) exceeding body temperature ( T b ), all five species showed increases in T b to maximum values around 44–45°C, accompanied by rapid increases in resting metabolic rate above clearly defined upper critical limits...

..., resting metabolic rate (RMR), organ mass and physiological and biochemical markers of metabolic activity in the Chinese bulbul ( Pycnonotus sinensis ). Groups of Chinese bulbuls were acclimated in a laboratory to the following conditions: (1) warm and long photoperiod, (2) warm and short photoperiod, (3...

... to disproportionately high rates of mortality at the end of lactation in this species. To examine and quantify metabolic changes associated with reproduction, we measured the resting metabolic rate (RMR) of a female sea otter across gestation, lactation and non-reproductive periods. Concurrently, measurements were made...

... low resting metabolic rates and low rates of evaporative water loss at their T uc (0.71 W and 1.20 g H 2 O h −1 , respectively), but were more sensitive to increasing air temperature, reaching their HTL at T air of 52°C. Mourning doves and white-winged doves maintained low resting metabolic rates...

... no competing financial interests. 26 5 2014 14 8 2014 © 2014. Published by The Company of Biologists Ltd 2014 Endothermy Multivariate mixed models Performance Resting metabolic rate RMR V O 2 ,max Metabolic rate (MR) is a fundamental measure in ecology and evolution...

... energetics accelerometry diving oxygen consumption rate exercise PDBA respiratory frequency body acceleration resting metabolic rate Marine turtles are large ectotherms with a general tropical to subtropical distribution. Six out of seven marine turtle species are currently listed...

... : Cambridge University Press . Speakman J. R. , Selman C. ( 2003 ). Physical activity and resting metabolic rate . Proc. Nutr. Soc. 62 , 621 - 634 . Speakman J. R. , Thomas D. W. ( 2003 ). Physiological ecology and energetics of bats . In Bat Ecology (ed. Kunz T...