scholarly journals Estimating the energy expenditure of free‐ranging polar bears using tri‐axial accelerometers: A validation with doubly labeled water

2019 ◽  
Vol 9 (7) ◽  
pp. 4210-4219 ◽  
Author(s):  
Anthony M. Pagano ◽  
Terrie M. Williams
Keyword(s):  
Energy Expenditure ◽  
Polar Bears ◽  
Doubly Labeled Water ◽  
Free Ranging

scholarly journals Use of feces to estimate isotopic abundance in doubly labeled water studies in reindeer in summer and winter

1997 ◽  
Vol 273 (4) ◽  
pp. R1451-R1456 ◽  
Author(s):  
Geir Gotaas ◽  
Eric Milne ◽  
Paul Haggarty ◽  
Nicholas J. C. Tyler
Keyword(s):  
Energy Metabolism ◽  
Energy Expenditure ◽  
Rate Constants ◽  
Total Energy Expenditure ◽  
Body Water ◽  
Doubly Labeled Water ◽  
Isotopic Abundance ◽  
Wild Mammals ◽  
Doubly Labeled Water Method ◽  
Free Ranging

The reliance on samples of blood or urine to estimate isotopic abundance in studies of energy metabolism using the doubly labeled water method has restricted application of the technique to animals that are either tame or easy to catch. This is generally not the case with large, free-ranging wild mammals. The use of feces as a source of body water in which to measure the concentration of isotopic markers was investigated in four female reindeer in summer and in winter.2H2O and H2 18O were injected to ∼160 parts per million excess. Samples of plasma and feces were then collected simultaneously for up to 456 h. Both isotopes were equilibrated with body water at 8 h postdose. There were no significant differences by animal between dilution spaces, rate constants, rates of CO2production, and total energy expenditure (TEE) calculated based on samples of plasma or feces in any trial. Mean TEE was 3.557 W/kg (SD 0.907, n = 4) in summer and 1.865 W/kg (SD 0.166, n = 4) in winter.

Flux hydriques et métabolisme énergétique dans un peuplement de Lacertidés des îles Kerkennah (Tunisie)

1988 ◽  
Vol 66 (3) ◽  
pp. 555-561 ◽  
Author(s):  
Roland Vernet ◽  
Claude Grenot ◽  
Saïd Nouira
Keyword(s):  
Energy Expenditure ◽  
Daily Activity ◽  
Water Flux ◽  
Sympatric Species ◽  
Doubly Labeled Water ◽  
Daily Energy Expenditure ◽  
Water Turnover ◽  
Semiarid Environment ◽  
Daily Energy ◽  
Active Forager

Water flux and daily energy expenditure were measured with doubly labeled water (3HH18O) in two insectivorous sympatric species of Lacertidae of Kerkennah islands (Tunisia), Eremias olivieri (mean body mass: 1.1 g) and Acanthodactylus pardalis (4.5 g) in a semiarid environment. Water turnover and field metabolic rate of Eremias olivieri (174 μL H2O g−1 d−1 and 250 J g−1 d−1) were, respectively, 2.5 and 5 times higher than those of Acanthodactylus pardalis (70 μL H2O g−1 d−1 and 52 J g−1 d−1). The water turnover of Eremias olivieri is one of the highest known among insectivorous lizards, and the daily energy expenditure of Acanthodactylus pardalis one of the lowest. The most plausible explanations are the differences in the size of the prey eaten by each species at this time of the season and in the duration of daily activity; the daily activity of Acanthodactylus pardalis is short (4.5 h d−1) although it is a sit-and-wait predator, whereas Eremias olivieri is active regularly every day for a longer period (7.5 h d−1) although it is an active forager. The high values of water turnover in Eremias olivieri suggest that food is not the only source of water for lizards in this particular insular environment.

scholarly journals Influence of body composition on physical activity validation studies using doubly labeled water

2004 ◽  
Vol 96 (4) ◽  
pp. 1357-1364 ◽  
Author(s):  
Louise C. Mâsse ◽  
Janet E. Fulton ◽  
Kathleen L. Watson ◽  
Matthew T. Mahar ◽  
Michael C. Meyers ◽  
...  
Keyword(s):  
Physical Activity ◽  
Body Composition ◽  
Energy Expenditure ◽  
Body Mass ◽  
Resting Metabolic Rate ◽  
Fat Free Mass ◽  
Doubly Labeled Water ◽  
Comparison Analysis ◽  
Methods Comparison ◽  
Statistical Procedures

This study investigated the influence of two approaches (mathematical transformation and statistical procedures), used to account for body composition [body mass or fat-free mass (FFM)], on associations between two measures of physical activity and energy expenditure determined by doubly labeled water (DLW). Complete data for these analyses were available for 136 African American (44.1%) and Hispanic (55.9%) women (mean age 50 ± 7.3 yr). Total energy expenditure (TEE) by DLW was measured over 14 days. Physical activity energy expenditure (PAEE) was computed as 0.90 × TEE - resting metabolic rate. During week 2, participants wore an accelerometer for 7 consecutive days and completed a 7-day diary. Pearson's product-moment correlations and three statistical procedures (multiple regressions, partial correlations, and allometric scaling) were used to assess the effect of body composition on associations. The methods-comparison analysis was used to study the effect of body composition on agreement. The statistical procedures demonstrated that associations improved when body composition was included in the model. The accelerometer explained a small but meaningful portion of the variance in TEE and PAEE after body mass was accounted for. The methods-comparison analysis confirmed that agreement with DLW was affected by the transformation. Agreement between the diary (transformed with body mass) and TEE reflected the association that exists between body mass and TEE. These results suggest that the accelerometer and diary accounted for a small portion of TEE and PAEE. Most of the variance in DLW-measured energy expenditure was explained by body mass or FFM.

Longitudinal assessment of energy expenditure in pregnancy by the doubly labeled water method

1993 ◽  
Vol 57 (4) ◽  
pp. 494-505 ◽  
Author(s):  
G R Goldberg ◽  
A M Prentice ◽  
W A Coward ◽  
H L Davies ◽  
P R Murgatroyd ◽  
...  
Keyword(s):  
Energy Expenditure ◽  
Doubly Labeled Water ◽  
Longitudinal Assessment ◽  
Doubly Labeled Water Method ◽  
In Pregnancy

scholarly journals Cavity ring‐down spectrometer for total energy expenditure using doubly‐labeled water

2010 ◽  
Vol 24 (S1) ◽  
Author(s):  
Bruce A. Richman ◽  
Dale A. Schoeller ◽  
Tom Thorsen ◽  
Tim Shriver ◽  
Eric R. Crosson
Keyword(s):  
Energy Expenditure ◽  
Total Energy ◽  
Total Energy Expenditure ◽  
Doubly Labeled Water ◽  
Cavity Ring Down

scholarly journals Perspective of an Appropriate Amount of Energy Intake and Actual Meal for the Diabetic and/or Obesity

2020 ◽  
Vol 2 (3) ◽  
pp. 64-67
Author(s):  
Bando H
Keyword(s):  
Energy Expenditure ◽  
Energy Intake ◽  
Nutritional Therapy ◽  
Doubly Labeled Water ◽  
Carbohydrate Diet ◽  
Metabolic Equivalent ◽  
Low Carbohydrate Diet ◽  
Low Carbohydrate ◽  
Diabetes And Obesity

Adequate nutritional therapy and research have been crucial for diabetes and obesity. Recent topics include Calorie restriction (CR) and Low Carbohydrate Diet (LCD). It is rather difficult to calculate energy intake in person, and also to calculate the energy of the meal. There are some methods for investigating these factors, such as the total energy expenditure (TEE), physical-activity-related energy expenditure (PAEE), metabolic equivalent (MET) values, and the doubly-labeled water (DLW) method. Multi factors would be involved in the study. Further investigation would be expected for the determination of an appropriate amount of energy intake and meal energy in the future.

scholarly journals Validating accelerometry-derived proxies of energy expenditure using the doubly-labelled water method in the smallest penguin species

Biology Open ◽  
2021 ◽  
pp. bio.055475
Author(s):  
G. J. Sutton ◽  
J. A. Botha ◽  
J. R. Speakman ◽  
J. P. Y. Arnould
Keyword(s):  
Energy Expenditure ◽  
Metabolic Rate ◽  
Energy Use ◽  
Travel Speed ◽  
Specific Energy Expenditure ◽  
Doubly Labelled Water ◽  
Data Collection And Analysis ◽  
Behavioural Patterns ◽  
Free Ranging ◽  
The Relationship

Understanding energy use is central to understanding an animal's physiological and behavioural ecology. However, directly measuring energy expenditure in free-ranging animals is inherently difficult. The doubly-labelled water (DLW) method is widely used to investigate energy expenditure in a range of taxa. Although reliable, DLW data collection and analysis is both financially costly and time consuming. Dynamic body acceleration (e.g. VeDBA) calculated from animal-borne accelerometers has been used to determine behavioural patterns, and is increasingly being used as a proxy for energy expenditure. Still its performance as a proxy for energy expenditure in free-ranging animals is not well established and requires validation against established methods. In the present study, the relationship between VeDBA and the at-sea metabolic rate calculated from DLW was investigated in little penguins (Eudyptula minor) using three approaches. Both in a simple correlation and activity-specific approaches were shown to be good predictors of at-sea metabolic rate. The third approach using activity-specific energy expenditure values obtained from literature did not accurately calculate the energy expended by individuals. However, all three approaches were significantly strengthened by the addition of mean horizontal travel speed. These results provide validation for the use of accelerometry as a proxy for energy expenditure and show how energy expenditure may be influenced by both individual behaviour and environmental conditions.

scholarly journals Simultaneous Validation of Seven Physical Activity Questionnaires Used in Japanese Cohorts for Estimating Energy Expenditure: A Doubly Labeled Water Study

2018 ◽  
Vol 28 (10) ◽  
pp. 437-442 ◽  
Author(s):  
Hiroyuki Sasai ◽  
Yoshio Nakata ◽  
Haruka Murakami ◽  
Ryoko Kawakami ◽  
Satoshi Nakae ◽  
...  
Keyword(s):  
Physical Activity ◽  
Energy Expenditure ◽  
Doubly Labeled Water ◽  
Activity Questionnaires
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