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Journal Articles Biological Journal of the Linnean Society Year : 2023

Variable rate of ageing within species: insights from Darwin’s frogs

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1
Andrés Valenzuela-Sánchez
Benedikt Schmidt
Claudio Azat
  • Function : Author
Soledad Delgado
  • Function : Author
Andrew Cunningham
  • Function : Author
Jean-Michel Gaillard
Hugo Cayuela
  • Function : Author

Abstract

Abstract Actuarial senescence, the increase in adult mortality risk with increasing age, is a widespread phenomenon across the animal kingdom. Although between-species variation in the rate of increase in mortality as organisms age (i.e. ageing rate) is now well documented, the occurrence of variation in ageing rate within a given species remains much more debatable. We evaluated the level of within-species variation in ageing rate in four populations of the southern Darwin’s frog (Rhinoderma darwinii) from Chile. Our results revealed strong among-population variation in ageing rates, and these were correlated with the population-specific generation time. A higher ageing rate occurred in populations where individuals exhibited a faster pace of life. Our results, along with recent studies in evolutionarily distant amphibian species, indicate that there can be substantial within-species variation in the rate of ageing, highlighting amphibians as emerging models to study the patterns and mechanisms of intraspecific variation in ageing rate.
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Dates and versions

hal-03932147 , version 1 (10-01-2023)

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Andrés Valenzuela-Sánchez, Benedikt Schmidt, Claudio Azat, Soledad Delgado, Andrew Cunningham, et al.. Variable rate of ageing within species: insights from Darwin’s frogs. Biological Journal of the Linnean Society, 2023, 138 (1), pp.68-74. ⟨10.1093/biolinnean/blac119⟩. ⟨hal-03932147⟩
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