Male reproductive senescence in mammals is pervasive and aligned with the slow-fast continuum

Reproductive senescence, the decline in reproductive performance with increasing age, has been well documented in mammalian females. Male reproductive senescence, on the other hand, is much less understood, partly due to the past complexities of getting reliable paternity assignment in the wild. Through a standardized literature search, we compiled age-specific reproductive data on both mating and reproductive success on 57 species encompassing 73 populations. We then explored the occurrence of male reproductive senescence and sought to identify key ecological and evolutionary drivers modulating its intensity. We found evidence of reproductive senescence in 60 % of the studied species, with a detection probability increasing with larger sample sizes and longer lifespan coverage (measured as the age range studied relative to longevity). As expected, both the onset and the rate of male reproductive senescence were aligned with the species position along the slow-fast continuum, with fast-..., , , # Data from: Male reproductive senescence in mammals is pervasive and aligned with the slow-fast continuum [https://doi.org/10.5061/dryad.8cz8w9h2t](https://doi.org/10.5061/dryad.8cz8w9h2t) ## Description of the data and file structure Read me file (scripts and data) Order in which the scripts were used and the purpose of each script: 1.     **Script_computing_new_traits**: Script used to calculate the values of traits added to the analyses, such as the number of offspring among breeders based on the data for number of offspring and paternity probability. The dataset linked to this script is `Dataset_computing_new_traits.csv`. 2.     **Script_pattern_senescence**: Script used to determine senescence patterns for each record (i.e., each trait in each population of each species). The dataset associated with this script is `Data_pattern.csv`, which corresponds to `Dataset_computing_new_traits.csv` plus the new traits calculated earlier (obtained at the end of `Script_computing_new_...,