Directional asymmetry in yellow-bellied sliders (Trachemys scripta scripta) (Schoepff 1792)

Bilateral symmetry is not uncommon in animal kingdom, and animals can deviate from expected symmetry and manifest some forms of asymmetries. Fluctuating asymmetry is considered a tool for valuating developmental instability, whereas directional asymmetry is inherited. Here we use the method of geome...

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Detalhes bibliográficos
Autores: Parés Casanova, Pere-Miquel, Ardiaca, Jordi, Martínez Silvestre, Albert
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2020
País:España
Recursos:Universitat de Lleida (UdL)
Repositorio:Repositori Obert UdL
OAI Identifier:oai:repositori.udl.cat:10459.1/69437
Acesso em linha:http://hdl.handle.net/10459.1/69437
Access Level:acceso abierto
Palavra-chave:Geometric morphometrics
Morphological variation
Testudines
Turtles
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spelling Directional asymmetry in yellow-bellied sliders (Trachemys scripta scripta) (Schoepff 1792)Parés Casanova, Pere-MiquelArdiaca, JordiMartínez Silvestre, AlbertGeometric morphometricsMorphological variationTestudinesTurtlesBilateral symmetry is not uncommon in animal kingdom, and animals can deviate from expected symmetry and manifest some forms of asymmetries. Fluctuating asymmetry is considered a tool for valuating developmental instability, whereas directional asymmetry is inherited. Here we use the method of geometric morphometrics to analyse left/right asymmetries in the plastron of 96 (33 males and 63 females) yellow-bellied sliders (Trachemys scripta scripta) with the primary aim to infer and explain morphological asymmetries between sexes in this species. In all individuals analysed we found both fluctuating asymmetry and directional asymmetry for size and shape variation components, and sexual dimorphism for the latter. Fluctuating asymmetry did account a low contribution of the total asymmetric variation, while directional asymmetry assumed the prominent contribution. This may be an adaptive response, which is present in both sexes. We suggest that natural selection for lateralised locomotor efficiency, and not sexual selection (i.e. genetic quality), must be the principal factor for directional asymmetry in this species. The results are consistent with reports from other turtle species using the same technique.Societas Europaea Herpetologica (SEH)2020info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10459.1/69437reponame:Repositori Obert UdL instname:Universitat de Lleida (UdL)InglésReproducció del document publicat a: https://www.biotaxa.org/hn/article/viewFile/52880/62699Herpetology Notes, 2020, vol. 13, p. 587-592(c) Societas Europaea Herpetologica (SEH), 2020info:eu-repo/semantics/openAccessoai:repositori.udl.cat:10459.1/694372026-06-24T12:42:17Z
dc.title.none.fl_str_mv Directional asymmetry in yellow-bellied sliders (Trachemys scripta scripta) (Schoepff 1792)
title Directional asymmetry in yellow-bellied sliders (Trachemys scripta scripta) (Schoepff 1792)
spellingShingle Directional asymmetry in yellow-bellied sliders (Trachemys scripta scripta) (Schoepff 1792)
Parés Casanova, Pere-Miquel
Geometric morphometrics
Morphological variation
Testudines
Turtles
title_short Directional asymmetry in yellow-bellied sliders (Trachemys scripta scripta) (Schoepff 1792)
title_full Directional asymmetry in yellow-bellied sliders (Trachemys scripta scripta) (Schoepff 1792)
title_fullStr Directional asymmetry in yellow-bellied sliders (Trachemys scripta scripta) (Schoepff 1792)
title_full_unstemmed Directional asymmetry in yellow-bellied sliders (Trachemys scripta scripta) (Schoepff 1792)
title_sort Directional asymmetry in yellow-bellied sliders (Trachemys scripta scripta) (Schoepff 1792)
dc.creator.none.fl_str_mv Parés Casanova, Pere-Miquel
Ardiaca, Jordi
Martínez Silvestre, Albert
author Parés Casanova, Pere-Miquel
author_facet Parés Casanova, Pere-Miquel
Ardiaca, Jordi
Martínez Silvestre, Albert
author_role author
author2 Ardiaca, Jordi
Martínez Silvestre, Albert
author2_role author
author
dc.subject.none.fl_str_mv Geometric morphometrics
Morphological variation
Testudines
Turtles
topic Geometric morphometrics
Morphological variation
Testudines
Turtles
description Bilateral symmetry is not uncommon in animal kingdom, and animals can deviate from expected symmetry and manifest some forms of asymmetries. Fluctuating asymmetry is considered a tool for valuating developmental instability, whereas directional asymmetry is inherited. Here we use the method of geometric morphometrics to analyse left/right asymmetries in the plastron of 96 (33 males and 63 females) yellow-bellied sliders (Trachemys scripta scripta) with the primary aim to infer and explain morphological asymmetries between sexes in this species. In all individuals analysed we found both fluctuating asymmetry and directional asymmetry for size and shape variation components, and sexual dimorphism for the latter. Fluctuating asymmetry did account a low contribution of the total asymmetric variation, while directional asymmetry assumed the prominent contribution. This may be an adaptive response, which is present in both sexes. We suggest that natural selection for lateralised locomotor efficiency, and not sexual selection (i.e. genetic quality), must be the principal factor for directional asymmetry in this species. The results are consistent with reports from other turtle species using the same technique.
publishDate 2020
dc.date.none.fl_str_mv 2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10459.1/69437
url http://hdl.handle.net/10459.1/69437
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://www.biotaxa.org/hn/article/viewFile/52880/62699
Herpetology Notes, 2020, vol. 13, p. 587-592
dc.rights.none.fl_str_mv (c) Societas Europaea Herpetologica (SEH), 2020
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) Societas Europaea Herpetologica (SEH), 2020
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Societas Europaea Herpetologica (SEH)
publisher.none.fl_str_mv Societas Europaea Herpetologica (SEH)
dc.source.none.fl_str_mv reponame:Repositori Obert UdL
instname:Universitat de Lleida (UdL)
instname_str Universitat de Lleida (UdL)
reponame_str Repositori Obert UdL
collection Repositori Obert UdL
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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