生态转变是鱼体内本体遗传与进化等量学之间的平行关系的基础
Mayara P Neves1, April Hugi1, Howan Chan1
1Department of Biosciences, Rice University, Houston, TX, USA.
Proceedings. Biological sciences
|October 29, 2024
概括
鱼的头骨形状在发育过程中发生了显著的变化,反映了它们从肉食祖先到草食成人的进化路径. 这项研究揭示了鱼头骨形态学的平行进化和发育轨迹.
科学领域:
- 进化生物学是进化的生物学.
- 发育生物学是发展生物学.
- 比较解剖学的比较解剖学.
背景情况:
- 动物经历了显著的本体遗传 (发育) 形状和尺寸变化,通常与生态利基转移有关.
- 鱼 (Labridae) 是一个很好的例子,它们从食肉幼虫转变为食草的成年人,有专门的嘴巴用于珊瑚的养.
- 这种本体遗传的饮食和生态转变与它们的进化历史相平行,它们是从肉食鱼祖先的进化历史.
研究的目的:
- 为了调查头骨形状的本体遗传和进化全度轨迹是否在鱼中平行.
- 为了比较条纹鱼 (Scarus iseri) 的本体遗传头骨度与相关的鱼和鱼的进化度.
主要方法:
- 利用微型计算机断层扫描 (μCT) 扫描进行了详细的头骨形态分析.
- 应用了三维几何形态测量来量化头骨形状的变化.
- 在Scarus iseri*中比较了57种鱼物种和162种非鱼鱼的进化度.
主要成果:
- 幼 *Scarus iseri* 呈现类似于非鱼鱼的头骨形状,在成熟时发展成长鱼的特征.
- 在 *S. iseri* 中,发现了大小和头骨形状之间的显著关系.
- 强有力的证据支持鱼的并行本体遗传和进化全度倾斜.
结论:
- 与鱼进化过程中的生态转变相关的形态变化,在它们的个体发育 (体育) 中得到保存.
- 鱼的本体遗传头骨形状变化反映了它们的宏观进化历史,并与之平行.
- 这表明,发育途径可以影响或反映进化模式.
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