Abstract
AbstractThe reduction in fecundity associated with the evolution of viviparity may have far-reaching implications for the ecology, demography, and evolution of populations. The evolution of a polygamous behaviour (e.g. polyandry) may counteract some of the effects underlying a lower fecundity, such as the reduction in genetic diversity. Comparing patterns of multiple paternity between reproductive modes allows us to understand how viviparity accounts for the trade-off between offspring quality and quantity. We analysed genetic patterns of paternity and offspring genetic diversity across 42 families from two modes of viviparity in a reproductive polymorphic species, Salamandra salamandra. This species shows an ancestral (larviparity: large clutches of free aquatic larvae), and a derived reproductive mode (pueriparity: smaller clutches of larger terrestrial juveniles). Our results confirm the existence of multiple paternity in pueriparous salamanders. Furthermore, we show the evolution of pueriparity maintains, and even increases, the occurrence of multiple paternity and the number of sires compared to larviparity, though we did not find a clear effect on genetic diversity. High incidence of multiple paternity in pueriparous populations might arise as a mechanism to avoid fertilization failures and to ensure reproductive success, and thus has important implications in highly isolated populations with small broods.
Funder
Ministerio de Educación, Cultura y Deporte
Ministerio de Economía y Competitividad
Fundação para a Ciência e a Tecnologia
European Regional Development Fund
Publisher
Springer Science and Business Media LLC
Reference74 articles.
1. Blackburn, D. G. Viviparity and oviparity: evolution and reproductive strategies. In Encyclopedia of Reproduction (eds Knobil, T. E. & Neill, J. D.) 994–1003 (Academic Press, Cambridge, 1999).
2. Blackburn, D. G. Evolution of vertebrate viviparity and specializations for fetal nutrition: a quantitative and qualitative analysis. J. Morphol. 276, 961–990 (2015).
3. Shine, R. The evolution of oviparity in squamate reptiles: an adaptationist perspective. J. Exp. Zool. Part B 324, 487–492 (2015).
4. Wourms, J. P. & Lombardi, J. Reflections on the evolution of piscine viviparity. Am. Zool. 32, 276–293 (1992).
5. Andrews, R. M. Evolution of viviparity in squamate reptiles (Sceloporus spp): a variant of the cold-climate model. J. Zool. 250, 243–253 (2000).
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