Is low fecundity of old males a consequence of seminal fluid or sperm declines, or female post-mating responses? Our new paper in evolution letters finds some surprising answers!
https://academic.oup.com/evlett/advance-article/doi/10.1093/evlett/qrae071/7943589#supplementary-data
https://academic.oup.com/evlett/advance-article/doi/10.1093/evlett/qrae071/7943589#supplementary-data
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https://www.sciencedirect.com/science/article/pii/S002251930600275X