facultative paedomorphosis; heterochrony; polymorphism; polyphenism; body condition; energy intake; fat reserves; feeding; lipid; triglyceride; evolution; habitat; Drakolimni; Greece; Pindos; Lac de la Cabane; Ichthyosaura alpestris; Mesotriton alpestris; Apennines; Alpine newt; Amphibian; Italy; pédomorphose; hétérochronie; Triton alpestre
Abstract :
[en] We documented hypotheses on the evolution of developmental heterochronies by estimating short- and long-term advantages of alternative morphs. In this respect, we compared food energy intakes and body condition between paedomorphic and metamorphic Alpine newts (Triturus alpestris, Caudata, Amphibia) in four populations. Because we found a strong correlation between fat reserves and body condition, we used this last parameter as an indicator of long-term gains. In all studied sites, paedomorphic females showed higher body condition than metamorphic ones. Paedomorphic males were also at advantage in two populations. Paedomorphs exhibited higher energy intakes than metamorphs in two populations and similar gains in two others. Our results support unifying theories that predict the occurrence of facultative paedomorphosis in varied habitats as paedomorphs exhibited better energy balance than metamorphs. This work shows the need for considering integrative parameters such as body condition in the comparative study of performances when studying developmental heterochronies. (C) 2002 The Linnean Society of London, Biological Journal of the Linnean Society, 2002, 77, 105-112.
Denoël, Mathieu ; Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Biologie du comportement - Ethologie et psychologie animale
Hervant, F.; Université Claude Bernard - Lyon 1 - UCLB
Schabetsberger, R.; University of Salzburg
Joly, Pierre; Université Claude Bernard - Lyon 1 - UCLB
Language :
English
Title :
Short- and long-term advantages of an alternative ontogenetic pathway
Publication date :
2002
Journal title :
Biological Journal of the Linnean Society
ISSN :
0024-4066
eISSN :
1095-8312
Publisher :
Academic Press Ltd Elsevier Science Ltd, London, United Kingdom
Volume :
77
Issue :
1
Pages :
105-112
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
Amadeus Project
Funders :
FRIA - Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture F.R.S.-FNRS - Fonds de la Recherche Scientifique ULiège. Patrimoine - Université de Liège. Patrimoine EU - European Union
Funding text :
Concours des Bourses de voyage This research was authorized by the French and Greek ministries of the Environment, and supported by the Fonds pour la Formation à la Recherche dans l’Agriculture
et dans l’Industrie, Fonds National de la Recherche Scientifique, Concours des Bourses de Voyage, Fondation Lefranc, Patrimoine de l'Université de Liège
and Amadeus project. M. Denoël is Chargé de recherches du Fonds National de la Recherche Scientifique (Belgium).
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