Article (Scientific journals)
The effect of food on growth and metamorphosis of paedomorphs in Triturus alpestris apuanus
Denoël, Mathieu; Poncin, Pascal
2001In Archiv für Hydrobiologie, 152 (4), p. 661-670
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Keywords :
Mesotriton alpestris apuanus; Paedomorphosis; Metamorphosis; Polyphenism; Food level; Phenotypic plasticity; Food ressources; Proximate causes; Growth; Body weight; Ichthyosaura alpestris apuana; Alpine newt; Body mass; Feeding; Body size; Italy; Apennines; Heterochrony; Metamorphose; Pédomorphose; Triton alpestre; Triturus; Resources; Alimentation; Croissance; Triturus alpestris apuanus; Experiment
Abstract :
[en] The effect of food level on growth and metamorphosis of paedomorphs was examined in an experimental replicated design in Triturus alpestris apuanus. Paedomorphosis concerns the retention of larval characteristics in adult individuals. Newts that forgo metamorphosis and then retain gill and gill slits in the adult stage maintain an aquatic life but keep potential for undergoing metamorphosis. Paedomorphs metamorphosed later in treatments with food as a non-limiting factor than in stressful treatments where food was limited. Timing of metamorphosis did not differ between males and females. Food level greatly affected growth rates. These results confirm and extend optimality models that predict paedomorphosis under advantageous aquatic conditions (paedomorph advantage hypothesis) and metamorphosis in stressful aquatic habitats.
Disciplines :
Environmental sciences & ecology
Zoology
Aquatic sciences & oceanology
Author, co-author :
Denoël, Mathieu  ;  Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Biologie du comportement - Ethologie et psychologie animale
Poncin, Pascal ;  Université de Liège - ULiège > Biologie du comportement - Ethologie et psychologie animale
Language :
English
Title :
The effect of food on growth and metamorphosis of paedomorphs in Triturus alpestris apuanus
Publication date :
November 2001
Journal title :
Archiv für Hydrobiologie
ISSN :
0003-9136
Publisher :
E Schweizerbartsche Verlags, Stuttgart, Germany
Volume :
152
Issue :
4
Pages :
661-670
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
This journal is now named International Journal of Limnology - Archiv für Hydrobiologie
Available on ORBi :
since 21 December 2008

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