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. 2021 Apr;24(4):719-727.
doi: 10.1111/ele.13696. Epub 2021 Feb 10.

Paternal age negatively affects sperm production of the progeny

Pauline Vuarin  1   2 , Loïc Lesobre  1 , Gwènaëlle Levêque  3 , Michel Saint Jalme  4 , Frédéric Lacroix  1 , Yves Hingrat  1 , Gabriele Sorci  2
Affiliations

Paternal age negatively affects sperm production of the progeny

Pauline Vuarin et al. Ecol Lett. 2021 Apr.

Abstract

Parental age has profound consequences for offspring's phenotype. However, whether patrilineal age affects offspring sperm production remains unknown, despite the importance of sperm production for male reproductive success in species facing post-copulatory sexual selection. Using a longitudinal dataset on ejaculate attributes of the houbara bustard, we showed that offspring sired by old fathers had different age-dependent trajectories of sperm production compared to offspring sired by young fathers. Specifically, they produced less sperm (-48%) in their first year of life, and 14% less during their lifetime. Paternal age had the strongest effect, with weak evidence for grandpaternal or great grandpaternal age effects. These results show that paternal age can affect offspring reproductive success by reducing sperm production, establishing an intergenerational link between ageing and sexual selection.

Keywords: Ageing; ejaculate quality; male gametes; offspring phenotype; paternal age; post-copulatory sexual selection; reproductive senescence.

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