ArticleInternational journal of biometeorology2026
The fertility of a sub-population of stallions is negatively affected by ambient climatic conditions, mediated through DNA damage.
Article in International journal of biometeorology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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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
1 citing paper in PubMed.
- Climate, Fertility and Oxidative Stress: Systemic and Localized Responses Associated with Ambient Heat-Induced Subfertility in Stallions.Antioxidants (Basel, Switzerland) · 2026Article
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Authors and funding
9 authors.
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Abstract
Exposure to systemic heat stress in male mammals adversely affects sperm production, fertility, and DNA integrity. To date, few studies have investigated this phenomenon in horses, particularly in industry-relevant environments. Therefore, this study examined the relationship between ambient climatic conditions and fertility within a population of commercially fertile stallions. Post-coital semen samples (n = 804) were collected weekly from 46 Thoroughbred stallions during two successive breeding seasons (NSW, Australia; 22 weeks total). Semen samples were processed via single-layer colloidal centrifugation on-site to remove contaminants, seminal plasma and poor-quality sperm cells. The remaining sperm fraction was resuspended in Biggers, Whitten and Whittingham (BWW) medium for analyses, including sperm concentration, motility, and DNA damage. Fertility data (first cycle and per-cycle pregnancy rates) were collected from farms. Loggers were placed in the stables and paddocks of stallions to record ambient temperature and humidity, on 3-min cycles. Our results indicate that current management regimens, involving the stabling of stallions at night, with paddock access during the day, expose stallions to highest ambient climatic conditions. Polynomial distributed lag modelling identified 18 stallions whose fertility was adversely affected by heat stress, based on correlations between fertility and ambient climatic conditions (p ≤ 0.05). Of these 18 candidate stallions, six (13% of the overall population) exhibited repeated positive relationships between ambient climatic conditions and sperm DNA damage, and repeated negative relationships between fertility and sperm DNA damage (r ≥ 0.50; p ≤ 0.05). These results suggest that heat-induced subfertility was most likely mediated via oxidative damage to the sperm DNA, and that current management strategies should be assessed to prevent exposure of stallions to maximal climatic conditions.
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