Egg retention and intrauterine embryonic development in Sceloporus aeneus (Reptilia: Phrynosomatidae): implications for the evolution of viviparity
Fuente:
Redalyc
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Artículo científico |
| Sprache: | en |
| Veröffentlicht: |
Universidad Nacional Autónoma de México
2012
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1876432694207840256 |
|---|---|
| author | Rodolfo García-Collazo |
| author_facet | Rodolfo García-Collazo |
| contents | Egg retention and intrauterine embryonic development in Sceloporus aeneus (Reptilia: Phrynosomatidae): implications for the evolution of viviparity Rodolfo García-Collazo Maricela Villagrán-Santa Cruz Eduardo Morales-Guillaumin Rubi Nelsi Meza Lázaro Fausto R. Méndez-de la Cruz Biología oviparity Reproductive mode viviparity evolution environmental factors Egg retention (ER) and intrauterine embryonic development (IED) have been considered intermediate steps in the evolution from oviparity to viviparity. Sceloporus aeneus is an oviparous lizard that is closely related to the viviparous species (Sceloporus bicanthalis). The present study addresses the following 2 questions: 1) Are intermediate stages of egg retention (ER and IED) present in populations of Sceloporus aeneus? and 2) Are ER and/or IED explained by elevation, precipitation or phylogenetic effects? Results indicate that in S. aeneus, ER differs among populations. ER was negatively related to altitude and pluvial precipitation, whereas average environmental temperature had no effect on ER or IER. In contrast to previous observations of oviparous species related to viviparous species, populations of S. aeneus with advanced IED are associated with environmental factors such as low elevation and aridity instead of high elevation and cold climate, whereas the comparative analysis shows that there are no significative evolutionary changes throughout the phylogeny, which means that the altitude has no effect on the transition to the evolution of viviparity in S. aeneus-S bicanthalis. 2012 artículo científico 1870-3453 https://www.redalyc.org/articulo.oa?id=42525103016 en http://www.redalyc.org/revista.oa?id=425 Revista Mexicana de Biodiversidad application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Biodiversidad (México) Num.3 Vol.83 |
| format | Artículo científico |
| id | redalyc_42525103016 |
| institution | Redalyc |
| language | en |
| publishDate | 2012 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Egg retention and intrauterine embryonic development in Sceloporus aeneus (Reptilia: Phrynosomatidae): implications for the evolution of viviparity Rodolfo García-Collazo Biología oviparity Reproductive mode viviparity evolution environmental factors Egg retention and intrauterine embryonic development in Sceloporus aeneus (Reptilia: Phrynosomatidae): implications for the evolution of viviparity Rodolfo García-Collazo Maricela Villagrán-Santa Cruz Eduardo Morales-Guillaumin Rubi Nelsi Meza Lázaro Fausto R. Méndez-de la Cruz Biología oviparity Reproductive mode viviparity evolution environmental factors Egg retention (ER) and intrauterine embryonic development (IED) have been considered intermediate steps in the evolution from oviparity to viviparity. Sceloporus aeneus is an oviparous lizard that is closely related to the viviparous species (Sceloporus bicanthalis). The present study addresses the following 2 questions: 1) Are intermediate stages of egg retention (ER and IED) present in populations of Sceloporus aeneus? and 2) Are ER and/or IED explained by elevation, precipitation or phylogenetic effects? Results indicate that in S. aeneus, ER differs among populations. ER was negatively related to altitude and pluvial precipitation, whereas average environmental temperature had no effect on ER or IER. In contrast to previous observations of oviparous species related to viviparous species, populations of S. aeneus with advanced IED are associated with environmental factors such as low elevation and aridity instead of high elevation and cold climate, whereas the comparative analysis shows that there are no significative evolutionary changes throughout the phylogeny, which means that the altitude has no effect on the transition to the evolution of viviparity in S. aeneus-S bicanthalis. 2012 artículo científico 1870-3453 https://www.redalyc.org/articulo.oa?id=42525103016 en http://www.redalyc.org/revista.oa?id=425 Revista Mexicana de Biodiversidad application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Biodiversidad (México) Num.3 Vol.83 |
| title | Egg retention and intrauterine embryonic development in Sceloporus aeneus (Reptilia: Phrynosomatidae): implications for the evolution of viviparity |
| topic | Biología oviparity Reproductive mode viviparity evolution environmental factors |
| url | https://www.redalyc.org/articulo.oa?id=42525103016 |