进化转变以优先考虑交配而不是护理,与男性三脊棒背的持续高的雌激素水平有关
Meghan F Maciejewski1, Alison M Bell2
1Department of Evolution, Ecology and Behavior, University of Illinois Urbana-Champaign, Urbana, IL, USA.
Hormones and behavior
|December 13, 2025
概括
类固醇激素的调节在三条脊椎的生态型之间有所不同,影响了社会行为和家长照顾的演变. 这些发现揭示了在早期进化分歧期间激素信号的变化.
科学领域:
- 内分泌学 在内分泌学.
- 进化生物学 进化生物学
- 行为生态学 行为生态学
背景情况:
- 类固醇激素对于脊椎动物的社会行为调节至关重要.
- 了解荷尔蒙如何推动这些行为演变至关重要.
- 三脊鱼种群为研究早期进化分歧提供了一个模型.
研究的目的:
- 为了研究两种具有不同社会行为 (家长的照顾与照顾的丧失) 的三棘生态型之间类固醇激素水平的差异.
- 探索如何激素调节变化跨生殖阶段与行为转变的关系.
- 提供有关类固醇信号演化的机制的见解.
主要方法:
- 使用液体染色体质谱法 (LC-MS/MS) 量化类固醇激素面板.
- 对常见的 (提供护理) 和白色 (失去护理) 粘甲鱼生态型的繁殖雄性中激素水平的分析.
- 在三个不同的繁殖阶段采样:巢穴完成,交配后和交配后四天.
主要成果:
- 雌激素水平在普通雄性中随着照顾下降,但在白色雄性中仍然很高,可能是筑巢粘合剂 (spiggin).
- 白人男性的孕激素水平较低,在交配后的普通男性中最低,这表明与性行为有相反的关系.
- 在交配后的两种生态型中,葡萄糖皮质激素水平同样增加,这表明压力轴功能得到保护.
结论:
- 三脊杆生态型表现出明显的类固醇激素调节模式.
- 激素调节中的这些差异支持交配和父母努力的差异平衡.
- 在早期的人口分歧期间,类固醇信号和调节可以通过各种机制演变.
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