Controlling for Body Mass Effects: Is Part‐Whole Correlation Important?

1999 ◽  
Vol 72 (2) ◽  
pp. 250-253 ◽  
Author(s):  
Julian K. Christians
Keyword(s):  
Body Mass ◽  
Mass Effects

Body Mass Effects of a Physical Activity and Healthy Food Intervention in Middle Schools*

Obesity ◽  
2006 ◽  
Vol 14 (5) ◽  
pp. 847-854 ◽  
Author(s):  
Leen Haerens ◽  
Benedicte Deforche ◽  
Lea Maes ◽  
Veerle Stevens ◽  
Greet Cardon ◽  
...  
Keyword(s):  
Physical Activity ◽  
Middle Schools ◽  
Body Mass ◽  
Healthy Food ◽  
Mass Effects

scholarly journals Accounting for body mass effects in the estimation of field metabolic rates from body acceleration

2021 ◽  
pp. jeb.233544
Author(s):  
Evan E. Byrnes ◽  
Karissa O. Lear ◽  
Lauran R. Brewster ◽  
Nicholas M. Whitney ◽  
Matthew J. Smukall ◽  
...  
Keyword(s):  
Body Mass ◽  
Predictive Models ◽  
Scale Dependence ◽  
Metabolic Rates ◽  
Body Acceleration ◽  
Mass Effects ◽  
Order Of Magnitude ◽  
Field Metabolic Rates ◽  
Free Ranging ◽  
Modelling Process

Dynamic Body Acceleration (DBA), measured through animal-attached tags, has emerged as a powerful method for estimating field metabolic rates of free-ranging individuals. Following respirometry to calibrate oxygen consumption rate (MO2) with DBA under controlled conditions, predictive models can be applied to DBA data collected from free-ranging individuals. However, laboratory calibrations are generally performed on a relatively narrow size range of animals, which may introduce biases if predictive models are applied to differently sized individuals in the field. Here, we tested the mass dependence of the DBA-MO2 relationship to develop an experimental framework for the estimation of field metabolic rates when organisms differ in size. We performed respirometry experiments with individuals spanning one order of magnitude in body mass (1.74–17.15 kg) and used a two-stage modelling process to assess the intraspecific scale dependence of the MO2-DBA relationship and incorporate such dependencies into the coefficients of MO2 predictive models. The final predictive model showed scale dependence; the slope of the MO2-DBA relationship was strongly allometric (M1.55), whereas the intercept term scaled closer to isometry (M1.08). Using bootstrapping and simulations, we evaluated the performance of this coefficient-corrected model against commonly used methods of accounting for mass effects on the MO2-DBA relationship and found the lowest error and bias in the coefficient-corrected approach. The strong scale dependence of the MO2-DBA relationship indicates that caution must be exercised when models developed using one size class are applied to individuals of different sizes.

Body mass and dive duration in alcids and penguins

1999 ◽  
Vol 77 (11) ◽  
pp. 1838-1842 ◽  
Author(s):  
Yutaka Watanuki ◽  
Alan E Burger
Keyword(s):  
Body Mass ◽  
Dive Duration ◽  
Allometric Equations ◽  
Metabolic Rates ◽  
Laboratory Studies ◽  
Allometric Exponent ◽  
Oxygen Store ◽  
Mass Effects ◽  
Aerobic Dive Limit ◽  
Oxygen Stores

Interspecific allometric equations for dive duration were calculated for two groups of wing-propelled divers: penguins, which specializing in diving, and alcids, which balance demands for aerial flying with those of diving. The equations for maximum dive duration (min) were 1.433M0.702 and 3.612M0.735 (where M is body mass in kilograms) for penguins (10 species) and alcids (9 species), respectively, hence did not support a simple oxygen store/usage hypothesis based on the prediction that the mass exponent of aerobic dive limit is close to 0.25. Equations for feeding dives were 0.569M0.712 and 1.094M0.391 in penguins (9 species) and alcids (10 species), respectively. The allometric exponent for the duration of feeding dives for penguins did not match the predicted value of 0.25, but that for alcids did not differ significantly from this value. Alcids exhibited a maximum dive duration 2.5 times longer than that for penguins after mass effects were controlled for. The size of oxygen stores and metabolic rates based on laboratory studies of penguins and alcids failed to explain the longer dive duration in alcids than in penguins.

Allometric cascade: a model for resolving body mass effects on metabolism

2003 ◽  
Vol 134 (4) ◽  
pp. 675-691 ◽  
Author(s):  
Peter W. Hochachka✠ ◽  
Charles-A. Darveau ◽  
Russel D. Andrews ◽  
Raul K. Suarez
Keyword(s):  
Body Mass ◽  
Mass Effects

scholarly journals Herbivorous reptiles and body mass: Effects on food intake, digesta retention, digestibility and gut capacity, and a comparison with mammals

2011 ◽  
Vol 158 (1) ◽  
pp. 94-101 ◽  
Author(s):  
Ragna Franz ◽  
Jürgen Hummel ◽  
Dennis W.H. Müller ◽  
Martin Bauert ◽  
Jean-Michel Hatt ◽  
...  
Keyword(s):  
Food Intake ◽  
Body Mass ◽  
Mass Effects
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