ArticlePloS one2015
Ejaculate Characteristics Depend on Social Environment in the Horse (Equus caballus).
Article in PloS one, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
What it found
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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.
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Who cites it
7 citing papers in PubMed.
- Exposure to novel females increases fecundity in adult male prairie voles.Hormones and behavior · 2025Article
- A New Approach of Sperm Motility Subpopulation Structure in Donkey and Horse.Frontiers in veterinary science · 2021Article
- High-throughput sperm assay using label-free microscopy: morphometric comparison between different sperm structures of boar and stallion spermatozoa.Animal reproduction science · 2020Article
- Case Report: Suppression of Harem Stallion Behavior and Fertility Following Anti-Gonadotropin-Releasing Hormone Vaccination of a Captive Wild Przewalski's Horse (Frontiers in veterinary science · 2020Article
- Quality of seminal fluids varies with type of stimulus at ejaculation.Scientific reports · 2017Article
- Female major histocompatibility complex type affects male testosterone levels and sperm number in the horse (Equus caballus).Proceedings. Biological sciences · 2015Article
- Importance of sperm morphology during sperm transport and fertilization in mammals.Asian journal of andrologyReview
Corrections and comments
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Authors and funding
3 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Sperm competition theory predicts semen characteristics to be affected by the social environment. We used the polygamous horse (Equus caballus) to experimentally study within-subject plasticity in response to different social environments. Stallions were sequentially exposed, over a period of 8 weeks each, to other stallions and then singly to mares, or vice versa (in adjacent boxes separated by grills). Ejaculates were collected to determine semen characteristics. Highest sperm numbers were found in stallions that were first exposed to other stallions and then to mares, while lowest sperm numbers were observed in stallions that had been exposed to mares but not yet to other stallions. One of three sperm velocity measures (curvilinear velocity) was consistently elevated in stallions that were first exposed to stallions and then to mares. Sperm number after exposure to mares and curvilinear sperm velocity after exposure to stallions were both positively correlated to average blood testosterone levels during the corresponding period of exposure. We conclude that ejaculate characteristics are plastic traits affected by the social environment in horses.
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