Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1002/ece3.6077
Lizenz creative commons licence
Titel (primär) Variation in body size and sexual size dimorphism in the most widely ranging lizard: testing the effects of reproductive mode and climate
Autor Roitberg, E.S.; Orlova, V.F.; Bulakhova, N.A.; Kuranova, V.N.; Eplanova, G.V.; Zinenko, O.I.; Arribas, O.; Kratochvíl, L.; Ljubisavljević, K.; Starikov, V.P.; Strijbosch, H.; Hofmann, S.; Leontyeva, O.A.; Böhme, W.
Quelle Ecology and Evolution
Erscheinungsjahr 2020
Department NSF
Band/Volume 10
Heft 11
Seite von 4531
Seite bis 4561
Sprache englisch
Keywords Bergmann's rule; ecogeographic body size clines; life‐history; lizards; Rensch's rule; Zootoca vivipara
Abstract Reproductive mode, ancestry, and climate are hypothesized to determine body size variation in reptiles but their effects have rarely been estimated simultaneously, especially at the intraspecific level. The common lizard (Zootoca vivipara ) occupies almost the entire Northern Eurasia and includes viviparous and oviparous lineages, thus representing an excellent model for such studies. Using body length data for >10,000 individuals from 72 geographically distinct populations over the species' range, we analyzed how sex‐specific adult body size and sexual size dimorphism (SSD) is associated with reproductive mode, lineage identity, and several climatic variables. Variation in male size was low and poorly explained by our predictors. In contrast, female size and SSD varied considerably, demonstrating significant effects of reproductive mode and particularly seasonality. Populations of the western oviparous lineage (northern Spain, south‐western France) exhibited a smaller female size and less female‐biased SSD than those of the western viviparous (France to Eastern Europe) and the eastern viviparous (Eastern Europe to Far East) lineages; this pattern persisted even after controlling for climatic effects. The phenotypic response to seasonality was complex: across the lineages, as well as within the eastern viviparous lineage, female size and SSD increase with increasing seasonality, whereas the western viviparous lineage followed the opposing trends. Altogether, viviparous populations seem to follow a saw‐tooth geographic cline, which might reflect the nonmonotonic relationship of body size at maturity in females with the length of activity season. This relationship is predicted to arise in perennial ectotherms as a response to environmental constraints caused by seasonality of growth and reproduction. The SSD allometry followed the converse of Rensch's rule, a rare pattern for amniotes. Our results provide the first evidence of opposing body sizeclimate relationships in intraspecific units.
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Roitberg, E.S., Orlova, V.F., Bulakhova, N.A., Kuranova, V.N., Eplanova, G.V., Zinenko, O.I., Arribas, O., Kratochvíl, L., Ljubisavljević, K., Starikov, V.P., Strijbosch, H., Hofmann, S., Leontyeva, O.A., Böhme, W. (2020):
Variation in body size and sexual size dimorphism in the most widely ranging lizard: testing the effects of reproductive mode and climate
Ecol. Evol. 10 (11), 4531 - 4561 10.1002/ece3.6077