Document Detail

Regional dissociated heterochrony in multivariate analysis.
MedLine Citation:
PMID:  15646279     Owner:  NLM     Status:  MEDLINE    
Heterochrony, the classic framework to study ontogeny and phylogeny, in essence relies on a univariate concept of shape. Though principal component plots of multivariate shape data seem to resemble classical bivariate allometric plots, the language of heterochrony cannot be translated directly into general multivariate methodology. We simulate idealized multivariate ontogenetic trajectories and demonstrate their behavior in principal component plots in shape space and in size-shape space. The concept of "dissociation", which is conventionally regarded as a change in the relationship between shape change and size change, appears to be algebraically the same as regional dissociation - the variation of apparent heterochrony by region. Only if the trajectories of two related species lie along exactly the same path in shape space can the classic terminology of heterochrony apply so that pure dissociation of size change against shape change can be detected. We demonstrate a geometric morphometric approach to these issues using adult and subadult crania of 48 Pan paniscus and 47 P. troglodytes. On each specimen we digitized 47 landmarks and 144 semilandmarks on ridge curves and the external neurocranial surface. The relation between these two species' growth trajectories is too complex for a simple summary in terms of global heterochrony.
P Mitteroecker; P Gunz; G W Weber; F L Bookstein
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Annals of anatomy = Anatomischer Anzeiger : official organ of the Anatomische Gesellschaft     Volume:  186     ISSN:  0940-9602     ISO Abbreviation:  Ann. Anat.     Publication Date:  2004 Dec 
Date Detail:
Created Date:  2005-01-13     Completed Date:  2005-02-17     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  100963897     Medline TA:  Ann Anat     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  463-70     Citation Subset:  IM    
Institute for Anthropology, University of Vienna, Althanstrasse 14, A-1091 Vienna, Austria.
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MeSH Terms
Aging / physiology*
Models, Biological
Multivariate Analysis
Pan paniscus / anatomy & histology*,  growth & development
Pan troglodytes / anatomy & histology*,  growth & development
Skull / anatomy & histology*,  growth & development

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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