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...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Dopazo, H.J., Korenblum, M.
Formato:	JOUR
Materias:	Comparative methods Exaptation Salamandra salamandra Urodeles Viviparity adaptation amphibian evolution viviparity
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00180831_v56_n2_p144_Dopazo
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_00180831_v56_n2_p144_Dopazo
record_format	dspace
spelling	todo:paper_00180831_v56_n2_p144_Dopazo2023-10-03T14:15:30Z Viviparity in Salamandra salamandra (Amphibia: Salamandridae): Adaptation or exaptation? Dopazo, H.J. Korenblum, M. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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, H.J. Korenblum, M. 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.
format	JOUR
author	Dopazo, H.J. Korenblum, M.
author_facet	Dopazo, H.J. Korenblum, M.
author_sort	Dopazo, H.J.
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?
url	http://hdl.handle.net/20.500.12110/paper_00180831_v56_n2_p144_Dopazo
work_keys_str_mv	AT dopazohj viviparityinsalamandrasalamandraamphibiasalamandridaeadaptationorexaptation AT korenblumm viviparityinsalamandrasalamandraamphibiasalamandridaeadaptationorexaptation
_version_	1807316540549234688

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

Ejemplares similares