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热变性诱导斑马鱼 (Danio rerio) 的性别特定的形态变化
A G Grigg1, T M Lowi-Merri2, J A Hutchings1,3,4
1Dalhousie University, Halifax, Nova Scotia, Canada.
Journal of fish biology
|September 8, 2023
概括
环境温度波动影响斑马鱼 (Danio rerio) 的发展. 早期暴露于可变温度会改变成年人身体的形状,男性在整个生命中暴露时表现出身体状况的改善.
科学领域:
- 生态生态学 生态生态学
- 发展生物学 发展生物学
- 进化生物学 进化生物学
背景情况:
- 生物体面临着环境的变化,但对温度波动的反应尚不清楚.
- 了解热可塑性对于预测生物体在气候变化中的适应性至关重要.
研究的目的:
- 调查不同生命阶段的温度波动如何影响斑马鱼 (Danio rerio) 成人的身体形状,大小和状况.
- 确定热变性暴露时间对表型可塑性的影响.
主要方法:
- 利用几何形态测量方法来分析身体形状和大小.
- 斑马鱼在特定的本体遗传时期 (早期,晚期或终身) 暴露于波动的 (22-32°C) 或静态的 (27°C) 温度.
主要成果:
- 热变性显著影响身体形状,大小和状况,其影响取决于暴露时间.
- 早期暴露于波动的温度导致性别特定的形状变化:女性的腹部更深,男性的尾部脚更长.
- 男性在终身波动的温度下表现出改善的身体状况,而女性没有表现出这种适应益处.
结论:
- 在本体发生过程中暴露于热波动的时间对斑马鱼的表型可塑性产生了重大影响.
- 在生态上现实的热系统揭示了特定阶段的发育反应和取决于性别的适应环境变化.
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