Reference : Neoteny and progenesis as two heterochronic processes involved in paedomorphosis in Trit...

	Document type :	Scientific journals : Article
	Discipline(s) :	Life sciences : Environmental sciences & ecology Life sciences : Multidisciplinary, general & others
	To cite this reference:	http://hdl.handle.net/2268/1588

Title :	Neoteny and progenesis as two heterochronic processes involved in paedomorphosis in Triturus alpestris (Amphibia: Caudata)
Language :	English
Author, co-author :	Denoël, Mathieu [Université de Liège - ULg > Département des sciences et gestion de l'environnement > Biologie du comportement - Ethologie et psychologie animale >]
	Joly, Pierre [Université Claude Bernard - Lyon 1 - UCLB > > > > > >]
Publication date :	2000
Journal title :	Proceedings of the Royal Society B : Biological Sciences
Volume :	267
Issue/season :	1451
Pages :	1481-1485
Audience :	International
ISSN :	0962-8452
Keywords :	[en] Heterochrony ; Paedomorphosis ; Neoteny ; Progenesis ; Development ; Evolution ; Amphibian ; Salamandridae ; Mesotriton alpestris ; Alpine newt ; Age structure ; Size structure ; Processes ; Demography ; Skeletochronology ; Age structure ; Early maturity ; Population size ; Ichthyosaura alpestris ; Lac de la cabane ; Appenines ; Growth
Abstract :	[en] Current theories on the evolution of paedomorphosis suppose that several ontogenetic pathways have appeared according to different selective pressures. The aim of this study was to find out whether two distinct processes can lead to paedomorphosis in the Alpine newt, Triturus alpestris. In this respect, we compared age structures of paedomorphic and metamorphic individuals in two newt populations where the two forms lived syntopically. Whereas paedomorphosis resulted in a slower rate of somatic development in one population, it resulted in an acceleration of sexual maturation in the other population. These processes correspond to neoteny and progenesis, respectively. These results suggest that phenotypic plasticity can result from contrasted ontogenetic pathways between two populations of the same species. They give support to models that consider gonadic development as the target of selection under different environmental pressures.
Funders :	Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS
Target :	Researchers ; Professionals ; Students
Permalink :	http://hdl.handle.net/2268/1588
DOI :	10.1098/rspb.2000.1168
Other URL :	http://dx.doi.org/10.1098/rspb.2000.1168

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