Reference : Sexual compatibility between two heterochronic morphs in the Alpine newt, Triturus al...
Scientific journals : Article
Social & behavioral sciences, psychology : Neurosciences & behavior
Social & behavioral sciences, psychology : Animal psychology, ethology & psychobiology
Life sciences : Zoology
http://hdl.handle.net/2268/3110
Sexual compatibility between two heterochronic morphs in the Alpine newt, Triturus alpestris
English
Denoël, Mathieu mailto [Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Biologie du comportement - Ethologie et psychologie animale >]
Poncin, Pascal mailto [Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Biologie du comportement - Ethologie et psychologie animale >]
Ruwet, Jean-Claude [Université de Liège - ULiège > > > >]
2001
Animal Behaviour
Academic Press
62
3
559-566
Yes (verified by ORBi)
International
0003-3472
London
United Kingdom
[en] Courtship behaviour ; Courtship behavior ; Sexual behaviour ; Sexual behavior ; Sexual isolation ; Reproductive isolation ; Reproductive success ; Isolation asymmetry ; Joint isolation ; Sympatric speciation ; Facultative paedomorphosis ; Polyphenism ; Polymorphism ; Heterochrony ; Evolution ; Mating ; Lac de la cabane ; Amphibian ; Alpine newt ; Ichthyosaura alpestris ; Mesotriton alpestris
[fr] Triton alpestre ; Amphibien ; Pédomorphose
[en] Paedomorphosis, in which individuals retain ancestral characteristics in the adult stage, is widespread in newts and salamanders and is suspected to play an important role in evolution. In some species, paedomorphosis is facultative with some individuals forgoing metamorphosis. Optimality models have been proposed to explain the maintenance of this polymorphism, but require the integration of reproductive patterns into the models. We investigated the frequencies of inbreeding and outbreeding in two syntopic heterochronic morphs of the Alpine newt. The two morphs are sexually compatible: encounters between and within morphs were equally successful in terms of spermatophore transfer. Behavioural observations were in agreement with the sexual compatibility observed. Nevertheless, paedomorphic males displayed to females less frequently than metamorphic males. The two morphs differ largely on the basis of sexual secondary characteristics, but the majority of these traits did not affect mating success. Because of the large flow of genes between the two heterochronic morphs and because of the absence of spatial and temporal isolation, these results do not support sympatric speciation models, but are in favour of the maintenance of polymorphism in natural populations. (C) 2001 The Association for the Study of Animal Behaviour.
Fonds pour la formation à la Recherche dans l'Industrie et dans l'Agriculture (Communauté française de Belgique) - FRIA
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/3110
10.1006/anbe.2001.1793
The final paginated paper is also available at Elsevier website (http://www.sciencedirect.com)

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