饮食诱导的可塑性改变了幼虫生长速度和足的后变态行为和生理之间的关系
Alexander M Shephard1, Sydney Jacobsen1, Cristina C Ledón-Rettig1
1Department of Biology, Indiana University at Bloomington, Bloomington, IN 47405-7005, USA.
The Journal of experimental biology
|December 19, 2024
概括
墨西哥脚的幼虫饮食类型影响了个体生长率与以后的行为和生理学的关系. 肉食动物的饮食削弱了这些相关性,表明饮食诱导的可塑性改变了生命史的特征关系.
科学领域:
- 行为生态学 行为生态学
- 发展生物学 发展生物学
- 生活 历史 进化 生命 历史 进化
背景情况:
- 个体行为和生理学的变化往往与生命史特征相关.
- 发育性可塑性可以改变这些跨环境的相关性.
- 幼虫的饮食是两动物可塑性的已知驱动因素.
研究的目的:
- 调查幼虫饮食类型如何影响墨西哥脚 (Spea multiplicata) 幼虫生长速度和变形后特征之间的关系.
- 为了确定饮食诱导的发育可塑性是否会改变特征相关性.
主要方法:
- 研究的Spea multiplicata幼虫在两个不同的饮食上长大:detritus (无食,增长较慢) 和仙女 (食肉,增长较快).
- 测量了幼虫生长速度和评估了变形后的行为 (大胆),生理学 (下丘脑-垂体-内轴反应),以及青青的端粒长度.
- 在两种饮食治疗中比较了幼虫生长和青少年特征之间的相关性.
主要成果:
- 饮食类型显著改变了幼虫生长率和变形后特征之间的相关性.
- 在碎片食者中,更快的生长与更大的胆量,更高的应力轴反应性和更长的端粒相关.
- 在食者中,这些相关性较弱,表明生长和幼年特征之间的关系减弱.
结论:
- 幼虫的饮食类型作为Spea multiplicata的发育可塑性的调解者.
- 饮食诱导的可塑性可以修改,在某些情况下减弱,生命历史特征和个体行为/生理学之间的相关性.
- 了解饮食的可塑性对于预测环境因素如何塑造特征关系至关重要.
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