| Title: | Viviparity is associated with larger female size and higher sexual size dimorphism in a reproductively bimodal lizard |
|---|
| Authors: | ID Roitberg, Evgeny S. (Author)
ID Recknagel, Hans (Author)
ID Elmer, K. R. (Author)
ID Braña, Florentino (Author)
ID Rodríguez Díaz, Tania (Author)
ID Žagar, Anamarija (Author)
ID Kuranova, Valentina Nikolaevna (Author)
ID Epova, Lidiya Alekseevna (Author)
ID Bauwens, Dirk (Author)
ID Giovine, Giovani (Author)
ID Orlova, V. F. (Author)
ID Bulakhova, N. A. (Author)
ID Eplanova, Galina (Author)
ID Arribas, Oscar (Author) |
|---|
| Files: |  URL - Similar work, visit https://doi.org/10.1111/1365-2656.14170
URL - Source URL, visit https://doi.org/10.5061/dryad.66t1g1k97
 ZIP - Presentation file, download (5,14 MB)
MD5: 26F2F392740F0DB0F760CECDA8E2D4D1
|
|---|
| Language: | English |
|---|
| Typology: | 2.20 - Complete scientific database of research data |
|---|
| Organization: |  NIB - National Institute of Biology
|
|---|
| Abstract: | Squamate reptiles are central for studying phenotypic correlates of evolutionary transitions from oviparity to viviparity because these transitions are numerous, with many of them being recent. Several models of life-history theory predict that viviparity is associated with increased female size, and thus more female-biased sexual size dimorphism (SSD). Yet the corresponding empirical evidence is overall weak and inconsistent. The lizard Zootoca vivipara, which occupies a major part of Northern Eurasia and includes four viviparous and two non-sister oviparous lineages, represents an excellent model for testing these predictions. We analysed how sex-specific body size and SSD is associated with parity mode, using body length data for nearly 14,000 adult individuals from 97 geographically distinct populations, which cover almost the entire species’ range and represent all six lineages. Our analyses controlled for lineage identity, climatic seasonality (the strongest predictor of geographic body size variation in previous studies of this species), and several aspects of data heterogeneity. Parity mode, lineage, and seasonality are significantly associated with female size and SSD; the first two predictors accounted for 14–26% of the total variation each, while seasonality explained 5–7%. Viviparous populations exhibited a larger female size than oviparous populations, with no concomitant differences in male size. Variation of male size was overall low and poorly explained by our predictors. Albeit fully expected from theory, the strong female bias of the body size differences between oviparous and viviparous populations found in Z. vivipara is not evident from available data on three other lizard systems of closely related lineages differing in parity mode. We confront this pattern with the data on female reproductive traits in the considered systems and the frequencies of evolutionary changes of parity mode in the corresponding lizard families and speculate why the life-history correlates of live-bearing in Z. vivipara are distinct. Comparing conspecific populations, our study provides the most direct evidence for the predicted effect of parity mode on adult body size but also demonstrates that the revealed pattern may not be general. This might explain why across squamates, viviparity is only weakly associated with larger size. |
|---|
| Keywords: | lizards, morphology, viviparity, sexual dimorphism, climate change, data |
|---|
| Publication status: | Published |
|---|
| Publication version: | Version of Record |
|---|
| Place of publishing: | Durham |
|---|
| Place of performance: | Durham |
|---|
| Publisher: | Dryad |
|---|
| Year of publishing: | 2025 |
|---|
| Year of performance: | 2025 |
|---|
| Number of pages: | 1 spletni vir |
|---|
| PID: | 20.500.12556/DiRROS-23946  |
|---|
| UDC: | 591 |
|---|
| DOI: | 10.5061/dryad.66t1g1k97 |
|---|
| COBISS.SI-ID: | 245689859 |
|---|
| Note: | Nasl. z. nasl. zaslona;
Opis vira z dne 14. 8. 2025;
Soavtorji: Recknagel, Hans; Elmer, Kathryn; Florentino, Braña; Rodríguez Díaz, Tania; Žagar, Anamarija; Kuranova, Valentina; Epova, Lidiya; Bauwens, Dirk; Giovine, Giovanni; Orlova, Valentina; Bulakhova, Nina; Eplanova, Galina; Arribas, Oscar;
|
|---|
| Publication date in DiRROS: | 27.10.2025 |
|---|
| Views: | 179 |
|---|
| Downloads: | 98 |
|---|
| Metadata: |    |
|---|
|
:
|
Copy citation |
|---|
| | | | Share: |  |
|---|
Hover the mouse pointer over a document title to show the abstract or click
on the title to get all document metadata. |
