Reference : Expression of sexual ornaments in a polymorphic species: phenotypic variation in resp...
Scientific journals : Article
Social & behavioral sciences, psychology : Animal psychology, ethology & psychobiology
Life sciences : Zoology
Life sciences : Environmental sciences & ecology
http://hdl.handle.net/2268/180029
Expression of sexual ornaments in a polymorphic species: phenotypic variation in response to environmental risk
English
Winandy, Laurane mailto [Université de Liège > Département de Biologie, Ecologie et Evolution > Biologie du comportement - Ethologie et psychologie animale >]
Denoël, Mathieu mailto [Université de Liège > Département de Biologie, Ecologie et Evolution > Biologie du comportement - Ethologie et psychologie animale >]
May-2015
Journal of Evolutionary Biology
Blackwell Science
28
5
1049-1056
Yes (verified by ORBi)
International
1010-061X
1420-9101
Oxford
United Kingdom
[en] natural selection ; sexual selection ; predation ; predatory risk ; evolution ; secondary sexual traits ; epigamic characters ; ornaments ; ornamentation ; phenotypic plasticity ; polymorphism ; polyphenism ; heterochrony ; facultative paedomorphosis ; alterantive phenotypes ; amphibian ; palmate newt ; Lissotriton helveticus ; Carassius auratus ; goldfish ; seasonal traits ; Fish introduction ; introduced species ; anti-predator defense
[en] Secondary sexual traits may evolve under the antagonistic context of sexual and natural selection. In some polymorphic species, these traits are only expressed during the breeding period and are differently expressed in alternative phenotypes. However, it is unknown whether such phenotypes exhibit phenotypic plasticity of seasonal ornamentations in response to environmental pressures such as in the presence of fish (predation risk). This is an important question to understand the evolution of polyphenisms. We used facultative paedomorphosis in newts as a model system because it involves the coexistence of paedomorphs that retain gills in the adult stage with metamorphs that have undergone metamorphosis, but also because newts exhibit seasonal sexual traits. Our aim was therefore to determine the influence of fish on the development of seasonal ornamentation in the two phenotypes of the palmate newt (Lissotriton helveticus). During the entire newt breeding period, we assessed the importance of phenotype and fish presence with an information-theoretic approach. Our results showed that paedomorphs presented much less developed ornamentation than metamorphs and those ornamentations varied over time. Fish inhibited the development of sexual traits but differently between phenotypes: in contrast to metamorphs, paedomorphs lack the phenotypic plasticity of sexual traits to environmental risk. This study points out that internal and external parameters act in complex ways in the expression of seasonal sexual ornamentations and that similar environmental pressure can induce a contrasted evolution in alternative phenotypes.
Applied and Fundamental FISH Research Center - AFFISH-RC
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS ; Fonds Spéciaux de la Recherches (Université de Liège)
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/180029
10.1111/jeb.12636
This paper is published by Wiley and is also available at their website (see DOI).

File(s) associated to this reference

Fulltext file(s):

FileCommentaryVersionSizeAccess
Restricted access
J_Evol_Biol_2015.pdfThis is the published pdf version of the manuscriptPublisher postprint465.98 kBRequest copy
Open access
J_Evol_Biol_2015_Author_Version.pdfThis the pdf of the author version of the manuscriptAuthor postprint182.57 kBView/Open

Bookmark and Share SFX Query

All documents in ORBi are protected by a user license.