Mammalian basal metabolic rate is proportional to body mass2/3
AUTOR(ES)
White, Craig R.
FONTE
The National Academy of Sciences
RESUMO
The relationship between mammalian basal metabolic rate (BMR, ml of O2 per h) and body mass (M, g) has been the subject of regular investigation for over a century. Typically, the relationship is expressed as an allometric equation of the form BMR = aMb. The scaling exponent (b) is a point of contention throughout this body of literature, within which arguments for and against geometric (b = 2/3) and quarter-power (b = 3/4) scaling are made and rebutted. Recently, interest in the topic has been revived by published explanations for quarter-power scaling based on fractal nutrient supply networks and four-dimensional biology. Here, a new analysis of the allometry of mammalian BMR that accounts for variation associated with body temperature, digestive state, and phylogeny finds no support for a metabolic scaling exponent of 3/4. Data encompassing five orders of magnitude variation in M and featuring 619 species from 19 mammalian orders show that BMR ∝ M2/3.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=153045Documentos Relacionados
- CHANGES IN THE BASAL METABOLIC RATE OF THE MALNOURISHED INFANT AND THEIR RELATION TO BODY COMPOSITION
- Evaluation of a Method of Estimating the Basal Metabolic Rate
- Basal metabolic rate in Brazilian patients with type 2 diabetes: comparison between measured and estimated values
- Mutants of feline immunodeficiency virus resistant to 2',3'-dideoxy-2',3'-didehydrothymidine.
- The rate constant of photoinhibition, measured in lincomycin-treated leaves, is directly proportional to light intensity.