scholarly journals LONG TERM HERITABILITY OF BASAL METABOLIC RATE

2005 ◽  
Vol 208 (24) ◽  
pp. ii-ii
Author(s):  
K. Phillips
Keyword(s):  
Metabolic Rate ◽  
Basal Metabolic Rate

scholarly journals Incubation temperature and physiological aging in the zebra finch

PLoS ONE ◽  
2021 ◽  
Vol 16 (11) ◽  
pp. e0260037
Author(s):  
Henrik H. Berntsen ◽  
Claus Bech
Keyword(s):  
Body Size ◽  
Oxidative Damage ◽  
Metabolic Rate ◽  
Body Mass ◽  
Basal Metabolic Rate ◽  
Incubation Temperature ◽  
Phenotypic Variability ◽  
Body Growth ◽  
Optimal Incubation

In birds, incubation temperature has received increased attention as an important source of phenotypic variability in offspring. A lower than optimal incubation temperature may negatively affect aspects of nestling physiology, such as body growth and energy metabolism. However, the long-term effects of sub-optimal incubation temperature on morphology and physiology are not well understood. In a previous study, we showed that zebra finches from eggs incubated at a low temperature (35.9°C) for 2/3 of the total incubation time suffered a lower post-fledging survival compared to individuals that had been incubated at higher temperatures (37.0 and 37.9°C). In the present study, we investigated whether these variations in incubation temperature could cause permanent long-lasting differences in body mass, body size, or basal metabolic rate. Furthermore, we tested whether the observed differences in survival between treatment groups would be reflected in the rate of physiological deterioration, assessed through oxidative damage and decreased metabolic rate with age (i.e. ‘metabolic aging’). Incubation temperature did not significantly affect embryonic or nestling body growth and did not influence final adult body mass or body size. Nor was there any long-term effect on basal metabolic rate. Birds from eggs incubated at the lowest temperature experienced an accumulation of oxidative damage with age, although this was not accompanied by an accelerated rate of metabolic aging. The present results suggest that the low survival in these birds was possibly mediated by increased oxidative stress, but independent of body growth and the basal metabolic rate.

scholarly journals Long-term repeatability of winter basal metabolic rate and mass in a wild passerine

2009 ◽  
Vol 23 (4) ◽  
pp. 768-773 ◽  
Author(s):  
Juli Broggi ◽  
Esa Hohtola ◽  
Kari Koivula ◽  
Markku Orell ◽  
Jan-��ke Nilsson
Keyword(s):  
Metabolic Rate ◽  
Basal Metabolic Rate

scholarly journals Abnormal Sympathoadrenal Activity, but Normal Energy Expenditure in Hypopituitarism

2003 ◽  
Vol 88 (12) ◽  
pp. 5689-5695 ◽  
Author(s):  
Henriette Mersebach ◽  
Ole Lander Svendsen ◽  
Arne Astrup ◽  
Ulla Feldt-Rasmussen
Keyword(s):  
Energy Expenditure ◽  
Metabolic Rate ◽  
Lean Body Mass ◽  
Body Mass ◽  
Fat Mass ◽  
Basal Metabolic Rate ◽  
Healthy Controls ◽  
Urinary Catecholamines ◽  
Sympathoadrenal Activity

Abstract In this study of 23 hypopituitary patients and 26 healthy controls, we have addressed whether the obese state of substituted hypopituitary patients is facilitated by abnormal sympathoadrenal activity or energy expenditure (EE). All patients received adequate substitution therapy including GH therapy. The investigation program included assessment of sympathoadrenal activity (urinary catecholamines), body composition (dual-energy x-ray absorptiometry), appetite sensations (visual analog scale), and EE (indirect calorimetry in respiration chamber). Twenty-four-hour urinary epinephrine adjusted for lean body mass and fat mass was significantly lower in patients compared with controls. GH and hydrocortisone were single negative predictors of urinary epinephrine. The major determinants of EE in patients were lean body mass and fat mass, explaining 96, 95, and 80% of the variance in 24-h EE, sleeping EE, and basal metabolic rate, respectively. Addition of urinary catecholamines explained another 1–4% of the variance in 24-h EE and basal metabolic rate, respectively. Lean patients exhibited significantly more hunger than obese patients and lean controls. In conclusion, hypopituitary patients have lower sympathoadrenal activity but normal EE, compared with healthy controls. This may reflect a central defect in hypopituitarism, however the possible impact of long-term GH and hydrocortisone treatment requires further attention.

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