Facultative oviparity in a viviparous skink ( Saiphos equalis).
bimodal reproduction
eggshell
evolution
scanning electron microscopy
squamate
viviparity
Journal
Biology letters
ISSN: 1744-957X
Titre abrégé: Biol Lett
Pays: England
ID NLM: 101247722
Informations de publication
Date de publication:
26 04 2019
26 04 2019
Historique:
entrez:
4
4
2019
pubmed:
4
4
2019
medline:
18
12
2019
Statut:
ppublish
Résumé
Facultative changes in parity mode (oviparity to viviparity and vice versa) are rare in vertebrates, yet offer fascinating opportunities to investigate the role of reproductive lability in parity mode evolution. Here, we report apparent facultative oviparity by a viviparous female of the bimodally reproductive skink Saiphos equalis-the first report of different parity modes within a vertebrate clutch. Eggs oviposited facultatively possess shell characteristics of both viviparous and oviparous S. equalis, demonstrating that egg coverings for viviparous embryos are produced by the same machinery as those for oviparous individuals. Since selection may act in either direction when viviparity has evolved recently, squamate reproductive lability may confer a selective advantage. We suggest that facultative oviparity is a viable reproductive strategy for S. equalis and that squamate reproductive lability is more evolutionarily significant than previously acknowledged.
Identifiants
pubmed: 30940025
doi: 10.1098/rsbl.2018.0827
pmc: PMC6501355
doi:
Substances chimiques
Triazines
0
menazon
3UO0XR34L1
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
20180827Références
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