热敏度的性别特定变化对生殖特征表现有多种负面影响
Matilda Q R Pembury Smith1,2, Daniela Trojmar1, Karl Gotthard1,2
1Department of Zoology, Stockholm University, Stockholm, Sweden.
The Journal of animal ecology
|March 18, 2025
概括
温度上升会损害蝶的繁殖能力,特别是男性的生育能力,影响人口增长. 这凸显了气候模型需要考虑热应激对性别特异性的生殖影响的必要性.
科学领域:
- 生态生态学 生态生态学
- 进化生物学 进化生物学
- 气候变化生物学 气候变化生物学
背景情况:
- 人口增长率受到温度依赖的生命史特征的影响.
- 生殖特征通常比生存或发育更敏感于温度.
- 生殖过程中的性别特异性热敏度会对人口动态产生差异性影响.
研究的目的:
- 研究热应激对子存活率和蝶的生殖特征的性别特异性影响.
- 为了确定温度升高如何影响交配成功,卵子生产,生育能力和精子活力.
- 评估雄性和雌性之间的生殖特征的不同热敏度.
主要方法:
- 蝶 (Pieris napi) 在受控温度 (22°C) 和高温 (29°C) 的条件下养.
- 测量了幼的生存时间,体重,交配成功,交配时间和卵子产量.
- 分析了生育能力,男性不育恢复以及精子特征 (欧皮林和阿皮林).
主要成果:
- 升高的温度降低了幼的生存率和两性人体体重.
- 热应激降低了雌性但不是雄性的交配成功.
- 由于受热压力的雄性由于受影响的精子生产/转移而表现出近乎完全的不孕不育,而这种不孕不育并未通过转精恢复.
结论:
- 适合发育的最佳温度可能会对特定性别的生殖能力产生负面影响.
- 由热应激引起的男性不孕症对人口持续性有重大影响.
- 未来的气候变暖模型必须纳入性别特定的生殖反应,以准确预测ectotherm种群的持续性.
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