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Reproductive senescence and parental effects in an indeterminate grower

Abstract : Reproductive senescence is the decrease of reproductive performance with increasing age and can potentially include trans-generational effects as the offspring produced by old parents might have a lower fitness than those produced by young parents. This negative effect may be caused either by the age of the father, mother, or the interaction between the ages of both parents. Using the common woodlouse Armadillidium vulgare, an indeterminate grower, as a biological model, we tested for the existence of a deleterious effect of parental age on fitness components. Contrary to previous findings reported from vertebrate studies, old parents produced both a higher number and larger offspring than young parents. However, their offspring had lower fitness components (by surviving less, producing a smaller number of clutches, or not reproducing at all) than offspring born to young parents. Our findings strongly support the existence of trans-generational senescence in woodlice and contradict the belief that old individuals in indeterminate growers contribute the most to recruitment and correspond thereby to the key life stage for population dynamics. Our work also provides rare evidence that the trans-generational effect of senescence can be stronger than direct reproductive senescence in indeterminate growers.
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https://hal.archives-ouvertes.fr/hal-03060301
Contributor : Jean-François Lemaitre <>
Submitted on : Monday, December 14, 2020 - 5:31:02 PM
Last modification on : Friday, August 27, 2021 - 4:32:02 PM
Long-term archiving on: : Monday, March 15, 2021 - 8:06:16 PM

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Charlotte Depeux, Jean-François Lemaître, Jérôme Moreau, François‐xavier Dechaume‐moncharmont, Tiffany Laverre, et al.. Reproductive senescence and parental effects in an indeterminate grower. Journal of Evolutionary Biology, Wiley, 2020, 33, pp.1256-1264. ⟨10.1111/jeb.13667⟩. ⟨hal-03060301⟩

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