Article (Scientific journals)
The role of predation risk in metamorphosis versus behavioural avoidance: a sex-specific study in a facultative paedomorphic amphibian
Denoël, Mathieu; Drapeau, Laura; Oromi Farrús, Neus et al.
2019In Oecologia, 189 (3), p. 637-645
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Keywords :
behavioural avoidance; facultative paedomorphosis; invasives pecies; metamorphosis; polyphenism; heterochrony; Larzac; Lissotriton helveticus; palmate newt; amphibian; goldfish; Carassus auratus; shelter use; behavioral ecology; biased sex-ratio; sexual differences; predation risk; experiment; anti-predator response; progenesis
Abstract :
[en] Evolutionary theory predicts the evolution of metamorphosis over paedomorphosis (the retention of larval traits at the adult stage) in response to life in unfavourable habitats and to the benefits of dispersal. Although many organisms are canalised into obligatory complex or simple life cycles, some species of newts and salamanders can express both processes (facultative paedomorphosis). Previous research highlighted the detrimental effect of fish on both metamorphic and paedomorphic phenotypes, but it remains unknown whether predation risk could induce shifts from paedomorphosis to metamorphosis, whether behavioural avoidance could be an alternative strategy to metamorphosis and whether these responses could be sex-biased. Testing these hypotheses is important because metamorphosed paedomorphs are dispersal individuals which could favour the long-term persistence of the process by breeding subsequently in more favourable waters. Therefore, we quantified the spatial behaviour and timing of the metamorphosis of facultative paedomorphic palmate newts Lissotriton helveticus in response to predation risk. We found that fish induced both male and female paedomorphs to hide more often, but behavioural avoidance was not predictive of metamorphosis. Paedomorphs did not metamorphose more in the presence of fish, yet there was an interaction between sex and predation risk in metamorphosis timing. These results improve our understanding of the lower prevalence of paedomorphs in fish environments and of the female-biased sex-ratios in natural populations of paedomorphic newts. Integrating sex-dependent payoffs of polyphenisms and dispersal across habitats is therefore essential to understand the evolution of these processes in response to environmental change.
Research center :
FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège
Disciplines :
Animal psychology, ethology & psychobiology
Environmental sciences & ecology
Aquatic sciences & oceanology
Author, co-author :
Denoël, Mathieu  ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Laboratoire d'Écologie et de Conservation des Amphibiens
Drapeau, Laura;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Unité de Biologie du Comportement - Laboratoire d'Ethologie des Poissons et Amphibiens
Oromi Farrús, Neus ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Laboratoire d'Écologie et de Conservation des Amphibiens
Winandy, Laurane ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Laboratoire d'Écologie et de Conservation des Amphibiens
Language :
English
Title :
The role of predation risk in metamorphosis versus behavioural avoidance: a sex-specific study in a facultative paedomorphic amphibian
Publication date :
March 2019
Journal title :
Oecologia
ISSN :
0029-8549
eISSN :
1432-1939
Publisher :
Springer, Germany
Volume :
189
Issue :
3
Pages :
637-645
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Available on ORBi :
since 06 March 2019

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