Reference : Genetic structure of lake and stream populations in a Pyrenean amphibian (Calotriton ...
Scientific journals : Article
Life sciences : Genetics & genetic processes
Life sciences : Aquatic sciences & oceanology
Life sciences : Environmental sciences & ecology
Life sciences : Zoology
Genetic structure of lake and stream populations in a Pyrenean amphibian (Calotriton asper) reveals evolutionary significant units associated with paedomorphosis
Oromi Farrús, Neus mailto [Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Biologie du comportement - Ethologie et psychologie animale >]
Valbuena-Ureña, Emilio [Universitat Autònoma de Barcelona > > > >]
Soler-Membrives, Anna [Soler-Membrives > > > >]
Amat, Felix [Museu de Granollers > > > >]
Camarasa, Sebastià [CSIC-Universitat Pompeu Fabra > > > >]
Carranza, Salvador [CSIC-Universitat Pompeu Fabra > > > >]
Sanuy, Delfi [Universitat de Lleida > > > >]
Denoël, Mathieu mailto [Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Biologie du comportement - Ethologie et psychologie animale >]
In press
Journal of Zoological Systematics and Evolutionary Research
Yes (verified by ORBi)
United Kingdom
[en] Conservation genetics ; Evolutionary significant units ; ESU ; Population genetics ; heterochrony ; paedomorphosis ; mountain lakes ; genetic isolation ; amphibians ; Brook newts ; Euproctus asper ; Calotriton asper ; Spanish Pyrenees ; Spain
[en] Differences in environmental conditions such as those between lakes and streams can produce phenotypic variation and ultimately promote evolutionary diversification. Some species of newts and salamanders can occupy these habitats and express alternative phenotypes: metamorphs that lose gills at metamorphosis and paedomorphs that retain them at the adult stage. Whereas this process is facultative in some species, it is obligatory in others, thus suggesting that isolation and environmental pressures may have canalized developmental pathways. In this study, we focused our research on the Pyrenean brook newt, Calotriton asper which is present in both lakes and streams, but whose fully aquatic paedomorphic individuals are only present in lakes. We aimed to determine the genetic structure and differentiation of two paedomorphic populations, including their surrounding stream and lake metamorphic populations, to test whether populations of paedomorphs can constitute evolutionary significant units. Although gene flow was identified between lakes and nearby stream populations, there was a low percentage of dispersers, and the paedomorphic populations were genetically differentiated from the populations of metamorphs. It is likely that the studied lakes have offered peculiar conditions that have allowed the development of a paedomorphic phenotype. These populations and phenotypes therefore constitute good models to understand local adaptations. As each of these populations of paedomorphs can be considered evolutionary significant units that cannot be replaced by other nearby populations in case of a population crash, conservation actions should be focused directly on them.
Freshwater and OCeanic science Unit of reSearch - FOCUS
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS ; Marie curie COFUND
The paginated published version of this paper will soon be available on Wiley Online Library (see DOI link). The author version is available in open access hereunder.

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