排卵投资因种群而异,但不是翅膀变形或感知精子竞争风险,在太平洋野中
Jessie C Tanner1,2,3,4, Justa L Heinen-Kay5, Lili Hagg5
1Centre for Evolutionary Biology, University of Western Australia, Crawley, WA, Australia 6005.
Journal of evolutionary biology
|November 14, 2025
概括
带有平翼表型的太平洋野在射精质量方面存在差异. 与卡瓦伊的男性相比,奥阿胡的男性有更高的丸质量和关键的精液蛋白 (SFP) 的表达.
科学领域:
- 进化生物学是进化的生物学.
- 性选择性选择性选择
- 动物行为 动物行为
背景情况:
- 性信号面临着相互矛盾的选择压力,影响特征进化.
- 太平洋野 (Teleogryllus oceanicus) 通过无声的"平翼表型"表现出快速的特征丧失.
- 尽管女性受到歧视,但沉默的雄性获得交配,为研究替代生殖策略 (ARTs) 提供了机会.
研究的目的:
- 在不同的精子竞争风险下,调查野生类型和平翼雄性之间的射精质量差异.
- 了解岛屿特定的交配率 (奥阿胡岛与考阿伊岛) 如何影响射精投资.
- 为了检查与父权和女性转嫁行为相关的精液蛋白 (SFPs) 的表达.
主要方法:
- 在两个夏威夷岛屿 (奥阿胡岛和卡瓦伊岛) 进行实地研究,其平翼频率不同.
- 操纵声学线索来模拟高和低感知精子竞争.
- 测量三个关键SFPs的丸质量和基因表达.
主要成果:
- 与卡瓦伊的男性相比,奥阿胡的雄性表现出较高的残留丸质量和ToSfp011的表达增加.
- ToSfp011增强了精子的活力,提高了父亲的成功,并减少了女性的转嫁行为.
- 没有观察到直接的精子竞争风险或翅膀变形对SFP或丸质量的显著影响.
结论:
- 不同的SFP表达和丸质量表明适应不同岛屿之间的交配率.
- 这些发现与不同生殖压力的种群中的精子竞争理论一致.
- 这项研究强调了射精投资的进化动态,以应对性选择.
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