20.500.12556/DiRROS-19316 Male mating strategies to counter sexual conflict in spiders When sexual conflict selects for reproductive strategies that only benefit one of the sexes, evolutionary arms races may ensue. Female sexual cannibalism is an extreme manifestation of sexual conflict. Here we test two male mating strategies aiming at countering sexual cannibalism in spiders. The “better charged palp” hypothesis predicts male selected use of the paired sexual organ (palp) containing more sperm for their first copulation. The “fast sperm transfer” hypothesis predicts accelerated insemination when cannibalism is high. Our comparative tests on five orbweb spider species with varying levels of female sexual cannibalism and sexual size dimorphism (SSD) reveal that males choose the palp with more sperm for the first copulation with cannibalistic females and that males transfer significantly more sperm if females are cannibalistic or when SSD is biased. By supporting the two hypotheses, these results provide credibility for male mating syndrome. They, however, open new questions, namely, how does a male differentiate sperm quantities between his palps? How does he perform palp choice after assessing his cannibalistic partner? By conducting follow-up experiments on Nephilengys malabarensis, we reveal that it is sperm volume detection, rather than left-right palp dominance, that plays prominently in male palp choice. spiders sexual conflict female sexual cannibalism true false true Angleški jezik Ni določen Neznano 2024-07-16 03:41:24 2024-07-17 09:14:17 2024-07-18 03:53:58 0000-00-00 00:00:00 2022 0 0 Ostali avtorji: Long Yu, Min Tan, Noeleen Y. L. Tan, Xaven X. B. Wong, Matjaž Kuntner & Daiqin Li; Nasl. z nasl. zaslona; Opis vira z dne 9. 6. 2022; str. 1-12 [Vol.] 5 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2022-06-02 595.44 2399-3642 10.1038/s42003-022-03512-8 111162627 https://doi.org/10.1038/s42003-022-03512-8 1 839afa83-4314-11ef-b487-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=26640 RAZ_Zhang_Shichang_2022.pdf RAZ_Zhang_Shichang_2022.pdf 1 A4828F039AEF27672BFE8F3990CB64C9 de84f87d93b5140ef3cbb7460095b7a08a37c96c0960d1fddc6e0b4b6164cb3c 1e573ab1-43fc-11ef-b487-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=26811 Nacionalni inštitut za biologijo 0 0 0