ArticleJournal of evolutionary biology2019
Male age and its association with reproductive traits in captive and wild house sparrows.
Article in Journal of evolutionary biology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers, 1 of them a synthesis that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
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.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
12 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Meta-analysis shows no consistent evidence for senescence in ejaculate traits across animals.Nature communications · 2024Pooled it
- It is hard to be small: Inbreeding depression on male breeding success depends on body size in a threatened songbird.Heredity · 2026Article
- What does not kill you makes you stronger? Effects of paternal age at conception on fathers and sons.Evolution; international journal of organic evolution · 2024Article
- Article
- When Older Males Sire More Offspring-Increased Attractiveness or Higher Fertility?Behavioral ecology and sociobiology · 2022Article
- Male age alone predicts paternity success under sperm competition when effects of age and past mating effort are experimentally separated.Proceedings. Biological sciences · 2021Article
- Animal culture research should include avian nest construction.Biology letters · 2021Article
- Temporal dynamics of competitive fertilization in social groups of red junglefowl (Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2020Article
- Sperm Morphology and Male Age in Black-Throated Blue Warblers, an Ecological Model System.Animals : an open access journal from MDPI · 2020Article
- Male age and its association with reproductive traits in captive and wild house sparrows.Journal of evolutionary biology · 2019Article
- Opposite-sex associations are linked with annual fitness, but sociality is stable over lifetime.Behavioral ecology : official journal of the International Society for Behavioral EcologyArticle
- Analysis of within-individual variation in extrapair paternity in blue tits (Behavioral ecology : official journal of the International Society for Behavioral EcologyArticle
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Evolutionary theory predicts that females seek extra-pair fertilizations from high-quality males. In socially monogamous bird species, it is often old males that are most successful in extra-pair fertilizations. Adaptive models of female extra-pair mate choice suggest that old males may produce offspring of higher genetic quality than young males because they have proven their survivability. However, old males are also more likely to show signs of reproductive senescence, such as reduced sperm quality. To better understand why old males account for a disproportionally large number of extra-pair offspring and what the consequences of mating with old males are, we compared several sperm traits of both captive and wild house sparrows, Passer domesticus. Sperm morphological traits and cloacal protuberance volume (a proxy for sperm load) of old and young males did not differ substantially. However, old males delivered almost three times more sperm to the female's egg than young males. We discuss the possibility of a post-copulatory advantage for old over young males and the consequences for females mated with old males.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.