ArticleScientific reports2019
Sperm quality and quantity evolve through different selective processes in the Phasianidae.
Article in Scientific reports, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers, 1 of them a synthesis that pooled it.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
6 citing papers in PubMed, 1 synthesis or guideline pooled it, 13 citations in OpenAlex.
- How sperm competition shapes the evolution of testes and sperm: a meta-analysis.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2020Pooled it
- Relative testis size is associated with vagina length but not sperm storage traits in Galliformes.Evolution letters · 2025Article
- Unboxing Industry-Standard AI Models for Male Fertility Prediction with SHAP.Healthcare (Basel, Switzerland) · 2023Article
- Larval social cues influence testicular investment in an insect.Current zoology · 2022Article
- Black goby territorial males adjust their ejaculate's characteristics in response to the presence of sneakers.Biology letters · 2021Article
- How female × male and male × male interactions influence competitive fertilization inEvolution letters · 2020Article
Corrections and comments
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Authors and funding
3 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Sperm competition is often considered the primary selective force underlying the rapid and diversifying evolution of ejaculate traits. Yet, several recent studies have drawn attention to other forms of selection with the potential of exceeding the effects of sperm competition. Since ejaculates are complex, multivariate traits, it seems plausible that different ejaculate components vary in their responses to different selective pressures. Such information, however, is generally lacking as individual ejaculate traits tend to be studied in isolation. Here, we studied the macroevolutionary patterns of ejaculate volume, sperm number, sperm length and the proportion of viable normal sperm in response to varying levels of sperm competition, body size and the duration of female sperm storage in pheasants and allies (Phasianidae). Ejaculate volume, sperm number and sperm viability were all relatively higher in polygamous than in monogamous mating systems. However, whereas ejaculate volume additionally covaried with body size, sperm number instead increased with the female sperm-storage duration, in conjunction with a decrease in sperm length. Overall, our results revealed important details on how different forms of selection can jointly shape ejaculates as complex, composite traits.
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