Scutation asymmetries in red-footed tortoise Chelonoidis carbonaria Spix, 1824 (Testudines: Testudinidae)

The ability of an individual to withstand random perturbations during its development is considered a good indicator of environmental and genetic stress. A common means of assessing developmental stability is through analysis of fluctuating asymmetry (FA) in bilateral traits. Tortoises, with their l...

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Autores: Parés Casanova, Pere-Miquel, Brando, Pinzón, Caviedes, Daniel, Salamanca-Carreño, Arcesio
Tipo de documento: artigo
Estado:Versão publicada
Data de publicação:2020
País:España
Recursos:Universitat de Lleida (UdL)
Repositório:Repositori Obert UdL
OAI Identifier:oai:repositori.udl.cat:10459.1/69439
Acesso em linha:https://doi.org/10.11606/1807-0205/2020.60.39
http://hdl.handle.net/10459.1/69439
Access Level:Acceso aberto
Palavra-chave:Directional asymmetry
Fluctuating asymmetry
Pholidosis
Tortoise shell
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spelling Scutation asymmetries in red-footed tortoise Chelonoidis carbonaria Spix, 1824 (Testudines: Testudinidae)Parés Casanova, Pere-MiquelBrando, PinzónCaviedes, DanielSalamanca-Carreño, ArcesioDirectional asymmetryFluctuating asymmetryPholidosisTortoise shellThe ability of an individual to withstand random perturbations during its development is considered a good indicator of environmental and genetic stress. A common means of assessing developmental stability is through analysis of fluctuating asymmetry (FA) in bilateral traits. Tortoises, with their large, solid plastron, allow for measurement of body geometry. Their bilateral shell scutes are ideal candidates for asymmetries researches. With this issue in mind we assessed, as a preliminary study, levels of plastron scute asymmetry in a sample of 46 red-footed tortoise Chelonoidis carbonaria from Arauca, N Colombia. We found significative fluctuating asymmetry (FA) but no directional asymmetry, the former not increasing with carapace size and thus indicating that tortoise shells do not become increasingly asymmetrical with age, or in other words, signaling that FA is not being influenced by pholidosis (variability of scale cover mosaic according to the development of the scutes). Asymmetry in plastron shape, although not necessarily apparent at first glance, varied, with gender with males exhibiting higher levels of FA than females. Although we can not identify the potential sources of variation responsible for the observed patterns of developmental instability, we consider this detected form of asymmetry due to unfavorable environmental conditions.Museu de Zoologia da Universidade de São Paulo (MZUSP)2020info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://doi.org/10.11606/1807-0205/2020.60.39http://hdl.handle.net/10459.1/69439reponame:Repositori Obert UdL instname:Universitat de Lleida (UdL)InglésReproducció del document publicat a: https://doi.org/10.11606/1807-0205/2020.60.39Papéis Avulsos de Zoologia, 2020, vol. 60, num. e20206039, p. 1-6cc-by (c) Papéis Avulsos de Zoologia, 2020info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/oai:repositori.udl.cat:10459.1/694392026-06-24T12:42:17Z
dc.title.none.fl_str_mv Scutation asymmetries in red-footed tortoise Chelonoidis carbonaria Spix, 1824 (Testudines: Testudinidae)
title Scutation asymmetries in red-footed tortoise Chelonoidis carbonaria Spix, 1824 (Testudines: Testudinidae)
spellingShingle Scutation asymmetries in red-footed tortoise Chelonoidis carbonaria Spix, 1824 (Testudines: Testudinidae)
Parés Casanova, Pere-Miquel
Directional asymmetry
Fluctuating asymmetry
Pholidosis
Tortoise shell
title_short Scutation asymmetries in red-footed tortoise Chelonoidis carbonaria Spix, 1824 (Testudines: Testudinidae)
title_full Scutation asymmetries in red-footed tortoise Chelonoidis carbonaria Spix, 1824 (Testudines: Testudinidae)
title_fullStr Scutation asymmetries in red-footed tortoise Chelonoidis carbonaria Spix, 1824 (Testudines: Testudinidae)
title_full_unstemmed Scutation asymmetries in red-footed tortoise Chelonoidis carbonaria Spix, 1824 (Testudines: Testudinidae)
title_sort Scutation asymmetries in red-footed tortoise Chelonoidis carbonaria Spix, 1824 (Testudines: Testudinidae)
dc.creator.none.fl_str_mv Parés Casanova, Pere-Miquel
Brando, Pinzón
Caviedes, Daniel
Salamanca-Carreño, Arcesio
author Parés Casanova, Pere-Miquel
author_facet Parés Casanova, Pere-Miquel
Brando, Pinzón
Caviedes, Daniel
Salamanca-Carreño, Arcesio
author_role author
author2 Brando, Pinzón
Caviedes, Daniel
Salamanca-Carreño, Arcesio
author2_role author
author
author
dc.subject.none.fl_str_mv Directional asymmetry
Fluctuating asymmetry
Pholidosis
Tortoise shell
topic Directional asymmetry
Fluctuating asymmetry
Pholidosis
Tortoise shell
description The ability of an individual to withstand random perturbations during its development is considered a good indicator of environmental and genetic stress. A common means of assessing developmental stability is through analysis of fluctuating asymmetry (FA) in bilateral traits. Tortoises, with their large, solid plastron, allow for measurement of body geometry. Their bilateral shell scutes are ideal candidates for asymmetries researches. With this issue in mind we assessed, as a preliminary study, levels of plastron scute asymmetry in a sample of 46 red-footed tortoise Chelonoidis carbonaria from Arauca, N Colombia. We found significative fluctuating asymmetry (FA) but no directional asymmetry, the former not increasing with carapace size and thus indicating that tortoise shells do not become increasingly asymmetrical with age, or in other words, signaling that FA is not being influenced by pholidosis (variability of scale cover mosaic according to the development of the scutes). Asymmetry in plastron shape, although not necessarily apparent at first glance, varied, with gender with males exhibiting higher levels of FA than females. Although we can not identify the potential sources of variation responsible for the observed patterns of developmental instability, we consider this detected form of asymmetry due to unfavorable environmental conditions.
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 https://doi.org/10.11606/1807-0205/2020.60.39
http://hdl.handle.net/10459.1/69439
url https://doi.org/10.11606/1807-0205/2020.60.39
http://hdl.handle.net/10459.1/69439
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.11606/1807-0205/2020.60.39
Papéis Avulsos de Zoologia, 2020, vol. 60, num. e20206039, p. 1-6
dc.rights.none.fl_str_mv cc-by (c) Papéis Avulsos de Zoologia, 2020
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
rights_invalid_str_mv cc-by (c) Papéis Avulsos de Zoologia, 2020
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Museu de Zoologia da Universidade de São Paulo (MZUSP)
publisher.none.fl_str_mv Museu de Zoologia da Universidade de São Paulo (MZUSP)
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
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