Problems of allometric scaling analysis: examples from mammalian reproductive biology.

Détails

Ressource 1Télécharger: 1731.full.pdf (908.64 [Ko])
Etat: Public
Version: Final published version
ID Serval
serval:BIB_FF58C96E5E17
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Problems of allometric scaling analysis: examples from mammalian reproductive biology.
Périodique
The Journal of experimental biology
Auteur(s)
Martin R.D., Genoud M., Hemelrijk C.K.
ISSN
0022-0949
Statut éditorial
Publié
Date de publication
2005
Peer-reviewed
Oui
Volume
208
Numéro
Pt 9
Pages
1731-47
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't ; Review - Publication Status: ppublish
Résumé
Biological scaling analyses employing the widely used bivariate allometric model are beset by at least four interacting problems: (1) choice of an appropriate best-fit line with due attention to the influence of outliers; (2) objective recognition of divergent subsets in the data (allometric grades); (3) potential restrictions on statistical independence resulting from phylogenetic inertia; and (4) the need for extreme caution in inferring causation from correlation. A new non-parametric line-fitting technique has been developed that eliminates requirements for normality of distribution, greatly reduces the influence of outliers and permits objective recognition of grade shifts in substantial datasets. This technique is applied in scaling analyses of mammalian gestation periods and of neonatal body mass in primates. These analyses feed into a re-examination, conducted with partial correlation analysis, of the maternal energy hypothesis relating to mammalian brain evolution, which suggests links between body size and brain size in neonates and adults, gestation period and basal metabolic rate. Much has been made of the potential problem of phylogenetic inertia as a confounding factor in scaling analyses. However, this problem may be less severe than suspected earlier because nested analyses of variance conducted on residual variation (rather than on raw values) reveals that there is considerable variance at low taxonomic levels. In fact, limited divergence in body size between closely related species is one of the prime examples of phylogenetic inertia. One common approach to eliminating perceived problems of phylogenetic inertia in allometric analyses has been calculation of 'independent contrast values'. It is demonstrated that the reasoning behind this approach is flawed in several ways. Calculation of contrast values for closely related species of similar body size is, in fact, highly questionable, particularly when there are major deviations from the best-fit line for the scaling relationship under scrutiny.
Mots-clé
Analysis of Variance, Animals, Basal Metabolism, Body Size, Brain, Data Interpretation, Statistical, Mammals, Models, Biological, Phylogeny, Reproduction, Species Specificity, Statistics, Nonparametric
Pubmed
Web of science
Open Access
Oui
Création de la notice
20/01/2008 16:07
Dernière modification de la notice
20/08/2019 17:29
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