Data from: Maternal longevity and offspring sex in wild ungulates

Mathieu Douhard, Marco Festa-Bianchet, Sandra Hamel, Dan Nussey, Steeve Côté, Josephine Pemberton & Fanie Pelletier
In species with sexual size dimorphism, offspring of the larger sex usually have greater energy requirements and may lead to greater fitness costs for parents. The effects of offspring sex on maternal longevity, however, have only been tested in humans. Human studies produced mixed results and considerable debate mainly due to the difficulty of distinguishing the effects of sexual dimorphism from sociocultural factors. To advance this debate, we examined how the relative number of sons...
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