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Accommodating heteroscedasticity in allometric biomass models [PDF]
Forest Ecology and Management, 2022 Abstract Allometric models are commonly used to predict forest biomass. These models typically take nonlinear power-law forms that predict individual tree aboveground biomass (AGB) as functions of diameter at breast height (D) and/or tree height (H). Because the residual variance is in most cases heteroscedastic, accommodating the heteroscedasticity (
Erik Næsset +2 more
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An Allometric Model for Pesticide Bioaccumulation
Canadian Journal of Fisheries and Aquatic Sciences, 1982A combination of the frequency distribution of body sizes and appropriate allometric relationships may permit a more operational approach to pesticide bioaccumulation than the more traditional trophic level concept. To demonstrate this potential, we describe patterns of bioaccumulation as functions of time and body size in a computer ecosystem in ...
Sara Griesbach +2 more
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An allometric network model of craniofacial growth
American Journal of Orthodontics, 1984This study of cranial skeletal growth kinematics details the conceptual principles underlying the development of an allometric network model of such growth. This model is tested by the analysis of longitudinal rat and cross-sectional human growth data and by comparison of this model with a previously described allometric centered model.
M L, Moss +5 more
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An Allometric Model of Remifentanil Pharmacokinetics and Pharmacodynamics
Anesthesiology, 2017Abstract Background Pharmacokinetic and pharmacodynamic models are used to predict and explore drug infusion schemes and their resulting concentration profiles for clinical application. Our aim was to develop a pharmacokinetic-pharmacodynamic model for remifentanil that is accurate in patients ...
Eleveld, D.J. +6 more
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Model Selection and Logarithmic Transformation in Allometric Analysis
Physiological and Biochemical Zoology, 2008The standard approach to most allometric research is to gather data on a biological function and a measure of body size, convert the data to logarithms, display the new values in a bivariate plot, and then fit a straight line to the transformations by the method of least squares.
Gary C, Packard, Thomas J, Boardman
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Choosing the Allometric Exponent in Covariate Model Building
Clinical Pharmacokinetics, 2018Allometric scaling is often used to describe the covariate model linking total body weight (WT) to clearance (CL); however, there is no consensus on how to select its value.The aims of this study were to assess the influence of between-subject variability (BSV) and study design on (1) the power to correctly select the exponent from a priori choices ...
Jaydeep Sinha +2 more
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Allometric Weight–Length Regression Model
Journal of the Fisheries Research Board of Canada, 1969Two methods of fitting the allometric weight–length relationship are described, one involving the common logarithmic transformation of variables in a multiplicative model and the other assuming an additive nonlinear model and general nonlinear estimation procedures.
L. V. Pienaar, J. A. Thomson
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