scholarly journals Phenotypic flexibility in the basal metabolic rate of laughing doves: responses to short-term thermal acclimation

2007 ◽  
Vol 210 (1) ◽  
pp. 97-106 ◽  
Author(s):  
A. E. McKechnie ◽  
K. Chetty ◽  
B. G. Lovegrove
Keyword(s):  
Metabolic Rate ◽  
Basal Metabolic Rate ◽  
Thermal Acclimation ◽  
Phenotypic Flexibility ◽  
Short Term

Thermal history can affect the short-term thermal acclimation of basal metabolic rate in the passerine Zonotrichia capensis

2009 ◽  
Vol 34 (8) ◽  
pp. 415-419 ◽  
Author(s):  
Gonzalo Barceló ◽  
Jonathan Salinas ◽  
Grisel Cavieres ◽  
Mauricio Canals ◽  
Pablo Sabat
Keyword(s):  
Metabolic Rate ◽  
Basal Metabolic Rate ◽  
Thermal History ◽  
Thermal Acclimation ◽  
Short Term ◽  
Zonotrichia Capensis

scholarly journals Short-term captivity influences maximal cold-induced metabolic rates and their repeatability in summer-acclimatized American goldfinches Spinus tristis

2013 ◽  
Vol 59 (4) ◽  
pp. 439-448 ◽  
Author(s):  
David L. Swanson ◽  
Marisa O. King
Keyword(s):  
Body Composition ◽  
Metabolic Rate ◽  
Muscle Growth ◽  
Metabolic Responses ◽  
Phenotypic Flexibility ◽  
Metabolic Rates ◽  
Wild Populations ◽  
Short Term ◽  
Fitness Consequences ◽  
Metabolic Variation

Abstract Studies of metabolic variation in birds have involved both wild and captive individuals, but few studies have investigated whether captivity directly influences metabolic rates, despite such variation potentially confounding conclusions regarding how metabolic rates respond to the conditions under study. In addition, whether short-term captivity influences metabolic rate repeatability in birds is currently uninvestigated. In this study, we measured Msum (maximal cold-induced metabolic rates) in summer acclimatized American goldfinches Spinus tristis directly after capture from wild populations, after approximately 2 weeks of indoor captivity (Captive 1), and again after an additional 1–2 weeks of captivity (Captive 2). Msum increased significantly (16.9%) following the initial captive period, but remained stable thereafter. Body mass (Mb) also increased significantly (9.2%) during the initial captive period but remained stable thereafter, suggesting that muscle growth and/or remodeling of body composition produced the observed metabolic variation. Mb and Msum were not significantly repeatable between wild and Captive 1 birds, but were significantly repeatable between Captive 1 and Captive 2 groups. These data suggest that caution must be exercised when extrapolating metabolic rates from short-term captive to wild populations. In addition, Msum was a repeatable trait for birds under conditions where mean metabolic rates remained stable, but Msum repeatability disappeared during acclimation to conditions promoting phenotypically flexible metabolic responses. This suggests that the capacity for phenotypic flexibility varies among individuals, and such variation could have fitness consequences.

Phenotypic flexibility in basal metabolic rate is associated with rainfall variability among populations of rufous-collared sparrow

Zoology ◽  
2012 ◽  
Vol 115 (2) ◽  
pp. 128-133 ◽  
Author(s):  
Karin Maldonado ◽  
Francisco Bozinovic ◽  
Grisel Cavieres ◽  
Carolina A. Fuentes ◽  
Arturo Cortés ◽  
...  
Keyword(s):  
Metabolic Rate ◽  
Basal Metabolic Rate ◽  
Rainfall Variability ◽  
Phenotypic Flexibility

scholarly journals CPAP Effect on Cardiopulmonary Exercise Testing Performance in Patients with Moderate-Severe OSA and Cardiometabolic Comorbidities

Medicina ◽  
2020 ◽  
Vol 56 (2) ◽  
pp. 80 ◽  
Author(s):  
Ioana Mădălina Zota ◽  
Cristian Stătescu ◽  
Radu Andy Sascău ◽  
Mihai Roca ◽  
Radu Sebastian Gavril ◽  
...  
Keyword(s):  
Oxygen Uptake ◽  
Metabolic Rate ◽  
Exercise Testing ◽  
Functional Capacity ◽  
Aerobic Capacity ◽  
Basal Metabolic Rate ◽  
Cardiopulmonary Exercise Testing ◽  
Short Term ◽  
Cardiopulmonary Exercise ◽  
Before And After

Background and Objectives: Obstructive sleep apnea (OSA) is associated with daytime somnolence, cognitive impairment and high cardiovascular morbidity and mortality. Obesity, associated cardiovascular comorbidities, accelerated erythropoiesis and muscular mitochondrial energetic dysfunctions negatively influence exercise tolerance in moderate-severe OSA patients. The cardiopulmonary exercise testing (CPET) offers an integrated assessment of the individual’s aerobic capacity and helps distinguish the main causes of exercise limitation. The purpose of this study is to evaluate the aerobic capacity of OSA patients, before and after short-term continuous positive airway pressure (CPAP). Materials and Methods: Our prospective study included 64 patients with newly diagnosed moderate-severe OSA (apnea hypopnea index (AHI) 39.96 ± 19.04 events/h) who underwent CPET before and after CPAP. Thirteen patients were unable to tolerate CPAP or were lost during follow-up. Results: 49.29% of our patients exhibited a moderate or severe decrease in functional capacity (Weber C or D). CPET performance was influenced by gender but not by apnea severity. Eight weeks of CPAP induced significant improvements in maximal exercise load (Δ = 14.23 W, p = 0.0004), maximum oxygen uptake (Δ = 203.87 mL/min, p = 0.004), anaerobic threshold (Δ = 316.4 mL/min, p = 0.001), minute ventilation (Δ = 5.1 L/min, p = 0.01) and peak oxygen pulse (Δ = 2.46, p = 0.007) as well as a decrease in basal metabolic rate (BMR) (Δ = −8.3 kCal/24 h, p = 0.04) and average Epworth score (Δ = −4.58 points, p < 0.000001). Conclusions: Patients with moderate-severe OSA have mediocre functional capacity. Apnea severity (AHI) was correlated with basal metabolic rate, resting heart rate and percent predicted maximum effort but not with anaerobic threshold or maximum oxygen uptake. Although CPET performance was similar in the two apnea severity subgroups, short-term CPAP therapy significantly improved most CPET parameters, suggesting that OSA per se has a negative influence on effort capacity.

scholarly journals The effects of graded levels of calorie restriction: VIII. Impact of short term calorie and protein restriction on basal metabolic rate in the C57BL/6 mouse

Oncotarget ◽  
2017 ◽  
Vol 8 (11) ◽  
pp. 17453-17474 ◽  
Author(s):  
Sharon E. Mitchell ◽  
ZhanHui Tang ◽  
Celine Kerbois ◽  
Camille Delville ◽  
Davina Derous ◽  
...  
Keyword(s):  
Metabolic Rate ◽  
Calorie Restriction ◽  
Basal Metabolic Rate ◽  
Protein Restriction ◽  
Short Term
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