Viviparity in Salamandra salamandra (Amphibia: Salamandridae): Adaptation or exaptation?

Ovoviviparity and viviparity have been described as derived reproductive modes in urodeles. Moreover, several authors have suggested that viviparity represents an adaptive solution to the harshness of high-altitude environments. Populations of Salamandra salamandra display ovoviviparity and vivipari...

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Detalles Bibliográficos
Autores principales: Dopazo, Hernán Javier, Korenblum, Hebe Marcela
Publicado: 2000
Materias:
Comparative methods
Exaptation
Salamandra salamandra
Urodeles
Viviparity
adaptation
amphibian
evolution
viviparity
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00180831_v56_n2_p144_Dopazo
http://hdl.handle.net/20.500.12110/paper_00180831_v56_n2_p144_Dopazo
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00180831_v56_n2_p144_Dopazo
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spelling paper:paper_00180831_v56_n2_p144_Dopazo2023-06-08T14:39:27Z Viviparity in Salamandra salamandra (Amphibia: Salamandridae): Adaptation or exaptation? Dopazo, Hernán Javier Korenblum, Hebe Marcela Comparative methods Exaptation Salamandra salamandra Urodeles Viviparity adaptation amphibian evolution viviparity Salamandra salamandra Ovoviviparity and viviparity have been described as derived reproductive modes in urodeles. Moreover, several authors have suggested that viviparity represents an adaptive solution to the harshness of high-altitude environments. Populations of Salamandra salamandra display ovoviviparity and viviparity as polytypic and polymorphic reproductive modes. This variation enables a test of the classic adaptive hypothesis of viviparity from a microevolutionary perspective. Comparative analysis using Felsenstein's independent contrasts and phylogenetic autocorrelation methods in six populations of S. salamandra have shown non-significant associations between altitude of populations and viviparous traits. Although these preliminary results must be corroborated with the study of more populations, we suggest an internalist hypothesis that takes into account the ubiquitous production of unfertilized, nutrient eggs in viviparous females. Thus, viviparity might have evolved as a byproduct of intraoviductal competition for resources by developing larvae. In this context, an exaptive scenario rather than an adaptive scenario might explain the origin of viviparity in S. salamandra and other urodeles. Fil:Dopazo, H.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Korenblum, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2000 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00180831_v56_n2_p144_Dopazo http://hdl.handle.net/20.500.12110/paper_00180831_v56_n2_p144_Dopazo
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Comparative methods
Exaptation
Salamandra salamandra
Urodeles
Viviparity
adaptation
amphibian
evolution
viviparity
Salamandra salamandra
spellingShingle Comparative methods
Exaptation
Salamandra salamandra
Urodeles
Viviparity
adaptation
amphibian
evolution
viviparity
Salamandra salamandra
Dopazo, Hernán Javier
Korenblum, Hebe Marcela
Viviparity in Salamandra salamandra (Amphibia: Salamandridae): Adaptation or exaptation?
topic_facet Comparative methods
Exaptation
Salamandra salamandra
Urodeles
Viviparity
adaptation
amphibian
evolution
viviparity
Salamandra salamandra
description Ovoviviparity and viviparity have been described as derived reproductive modes in urodeles. Moreover, several authors have suggested that viviparity represents an adaptive solution to the harshness of high-altitude environments. Populations of Salamandra salamandra display ovoviviparity and viviparity as polytypic and polymorphic reproductive modes. This variation enables a test of the classic adaptive hypothesis of viviparity from a microevolutionary perspective. Comparative analysis using Felsenstein's independent contrasts and phylogenetic autocorrelation methods in six populations of S. salamandra have shown non-significant associations between altitude of populations and viviparous traits. Although these preliminary results must be corroborated with the study of more populations, we suggest an internalist hypothesis that takes into account the ubiquitous production of unfertilized, nutrient eggs in viviparous females. Thus, viviparity might have evolved as a byproduct of intraoviductal competition for resources by developing larvae. In this context, an exaptive scenario rather than an adaptive scenario might explain the origin of viviparity in S. salamandra and other urodeles.
author Dopazo, Hernán Javier
Korenblum, Hebe Marcela
author_facet Dopazo, Hernán Javier
Korenblum, Hebe Marcela
author_sort Dopazo, Hernán Javier
title Viviparity in Salamandra salamandra (Amphibia: Salamandridae): Adaptation or exaptation?
title_short Viviparity in Salamandra salamandra (Amphibia: Salamandridae): Adaptation or exaptation?
title_full Viviparity in Salamandra salamandra (Amphibia: Salamandridae): Adaptation or exaptation?
title_fullStr Viviparity in Salamandra salamandra (Amphibia: Salamandridae): Adaptation or exaptation?
title_full_unstemmed Viviparity in Salamandra salamandra (Amphibia: Salamandridae): Adaptation or exaptation?
title_sort viviparity in salamandra salamandra (amphibia: salamandridae): adaptation or exaptation?
publishDate 2000
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00180831_v56_n2_p144_Dopazo
http://hdl.handle.net/20.500.12110/paper_00180831_v56_n2_p144_Dopazo
work_keys_str_mv AT dopazohernanjavier viviparityinsalamandrasalamandraamphibiasalamandridaeadaptationorexaptation
AT korenblumhebemarcela viviparityinsalamandrasalamandraamphibiasalamandridaeadaptationorexaptation
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