建立免疫反应降低了的男性吸引力
Mar Comas1,2, Francisco J Zamora-Camacho3,4, Jorge Garrido-Bautista2
1Department of Biological Sciences, Dartmouth College, Hanover, NH, USA.
Integrative zoology
|September 2, 2024
概括
通过减少气味信号,建立免疫反应会降低雄性的吸引力. 这项研究表明,免疫挑战诚实地信号维生素D分配,影响伴侣选择.
科学领域:
- 生态学和进化生物学.
- 动物行为 动物行为
- 免疫学 免疫学 免疫学
背景情况:
- 寄生虫对宿主生命史和健康状况施加选择性压力.
- 装饰性特征往往是免疫能力的信号,女性更喜欢装饰的男性.
- 免疫反应可能是昂贵的,可能会减少性信号的表达和吸引力.
研究的目的:
- 为了调查在,Psammodromus algirus.性吸引力上建立免疫反应的成本.
- 通过化学信号的变化来确定免疫激活是否会导致吸引力下降.
- 探索维生素D分配在调解免疫力和吸引力之间的关系中的作用.
主要方法:
- 男人用脂聚糖 (LPS) 接种,以模拟免疫挑战,对照组接受假接种.
- 用生物化学分析量化了大腿部分泌物中的厄戈斯特水平.
- 通过化学传感测试来评估女性伴侣偏好,评估来自对照和LPS注射的男性的气味吸引力.
主要成果:
- 在男性大腿部分泌物中,LPS注射显著降低了ergosterol比例.
- 与对照男性相比,LPS注射的男性的气味对女性来说不那么有吸引力.
- 减少的厄戈斯特醇表明转移维生素D前体来支持免疫系统.
结论:
- 建立免疫反应在P. algirus.的性吸引力下降方面产生了代价.
- 股骨的气味成分,特别是与维生素D相关的厄戈斯特水平,作为免疫状况的诚实信号.
- 雌性可以通过气味线索检测免疫受损的雄性,更喜欢更健康,更有吸引力的伴侣.
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