Understanding the evolution of viviparity using intraspecific variation in reproductive mode and transitional forms of pregnancy Article Swipe
Camilla M. Whittington
,
James U. Van Dyke
,
Stephanie Q. T. Liang
,
Scott V. Edwards
,
Richard Shine
,
Michael B. Thompson
,
Catherine E. Grueber
·
YOU?
·
· 2022
· Open Access
·
· DOI: https://doi.org/10.1111/brv.12836
YOU?
·
· 2022
· Open Access
·
· DOI: https://doi.org/10.1111/brv.12836
How innovations such as vision, flight and pregnancy evolve is a central question in evolutionary biology. Examination of transitional (intermediate) forms of these traits can help address this question, but these intermediate phenotypes are very rare in extant species. Here we explore the biology and evolution of transitional forms of pregnancy that are midway between the ancestral state of oviparity (egg‐laying) and the derived state, viviparity (live birth). Transitional forms of pregnancy occur in only three vertebrates, all of which are lizard species that also display intraspecific variation in reproductive phenotype. In these lizards ( Lerista bougainvillii , Saiphos equalis , and Zootoca vivipara ), geographic variation of three reproductive forms occurs within a single species: oviparity, viviparity, and a transitional form of pregnancy. This phenomenon offers the valuable prospect of watching ‘evolution in action’. In these species, it is possible to conduct comparative research using different reproductive forms that are not confounded by speciation, and are of relatively recent origin. We identify major proximate and ultimate questions that can be addressed in these species, and the genetic and genomic tools that can help us understand how transitional forms of pregnancy are produced, despite predicted fitness costs. We argue that these taxa represent an excellent prospect for understanding the major evolutionary shift between egg‐laying and live birth, which is a fundamental innovation in the history of animals.
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Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1111/brv.12836
- https://onlinelibrary.wiley.com/doi/pdfdirect/10.1111/brv.12836
- OA Status
- hybrid
- Cited By
- 31
- References
- 132
- Related Works
- 10
- OpenAlex ID
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All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W4213054454Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.1111/brv.12836Digital Object Identifier
- Title
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Understanding the evolution of viviparity using intraspecific variation in reproductive mode and transitional forms of pregnancyWork title
- Type
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articleOpenAlex work type
- Language
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enPrimary language
- Publication year
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2022Year of publication
- Publication date
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2022-01-30Full publication date if available
- Authors
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Camilla M. Whittington, James U. Van Dyke, Stephanie Q. T. Liang, Scott V. Edwards, Richard Shine, Michael B. Thompson, Catherine E. GrueberList of authors in order
- Landing page
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https://doi.org/10.1111/brv.12836Publisher landing page
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https://onlinelibrary.wiley.com/doi/pdfdirect/10.1111/brv.12836Direct link to full text PDF
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YesWhether a free full text is available
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hybridOpen access status per OpenAlex
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https://onlinelibrary.wiley.com/doi/pdfdirect/10.1111/brv.12836Direct OA link when available
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Intraspecific competition, Biology, Variation (astronomy), Evolutionary biology, Zoology, Physics, AstrophysicsTop concepts (fields/topics) attached by OpenAlex
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31Total citation count in OpenAlex
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2025: 1, 2024: 14, 2023: 12, 2022: 4Per-year citation counts (last 5 years)
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132Number of works referenced by this work
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10Other works algorithmically related by OpenAlex
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