{
  "id": 13207228,
  "title": "Sperm length ornamentation associates with survival and sterility after heatwaves among Drosophila species",
  "url": "https://urgent.news/2026/10/09/sperm-length-ornamentation-associates-with-survival-and-sterility",
  "topic": "science",
  "section": "Science",
  "published": "2026-10-09T00:00:00.000Z",
  "source": {
    "name": "bioRxiv",
    "slug": "biorxiv",
    "url": "https://www.biorxiv.org/content/10.64898/2026.10.08.757264v1?rss=1"
  },
  "original_language": "en",
  "account": "A recent study examining 42 Drosophila species has revealed a fascinating link between sperm length and survival in the face of heatwaves. Sexual selection, which favors ornamented traits such as longer sperm, can positively impact a male's ability to survive high temperatures. However, the study also found that the capacity to remain fertile does not increase as markedly with sperm length. Consequently, longer sperm species experience a greater difference between temperatures that kill and those that sterilize males. The results suggest that strong sexual selection on condition-dependent, exaggerated traits like longer sperm may help males adapt to environmental stressors. Yet, there is a trade-off, as susceptibility to heat-induced infertility may be a cost of such extreme sperm ornamentation. The findings highlight the complex interplay between postcopulatory sexual selection and the challenges posed by climate change.",
  "summary": "Whether sexual selection facilitates or hinders adaptation to novel environments is a question of fundamental importance due to current rapid environmental change. Using phylogenetic comparative analysis in 42 Drosophila species, we found that sperm length - a sexually selected ornament - positively associates with the ability of males to survive high temperatures. However, the ability to remain…",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}