样本大小和几何形态测量方法影响形态变异的评估
A D Rummel1, E T Sheehy2, E R Schachner3
1Department of BioSciences, Rice University, Houston, TX 77005, USA.
Integrative organismal biology (Oxford, England)
|February 5, 2024
概括
样本大小和视图选择显著影响蝙蝠头骨形状的二维几何形态测量 (2DGM) 分析. 使用多个视图,元素和样本大小的初步分析,确保在形态进化研究中得出可靠的结论.
科学领域:
- 进化生物学是进化的生物学.
- 比较解剖学的比较解剖学.
- 形态进化的形态演变.
背景情况:
- 二维几何形态测量 (2DGM) 对于研究形态进化至关重要.
- 2DGM结果可能会受到样本大小,选择的观点和元素的影响,通常是由于实际约束.
- 了解这些影响对于可靠的进化和分类学研究至关重要.
研究的目的:
- 为了评估样本大小对蝙蝠头骨形状的2DGM分析的影响.
- 评估2DGM中不同头骨视图和元素的一致性.
- 为了确定2DGM是否可以区分形态上神秘的蝙蝠物种.
主要方法:
- 在两种蝙蝠物种:Lasiurus borealis和Nycticeius humeralis中采用了大型内属样本大小 (>70).
- 在多个头骨视图和元素上进行2DGM分析.
- 评估了形状变化,方差和心状尺寸,并比较了不同样本大小和视图的结果.
主要成果:
- 减少样本大小改变了平均形状和增加了形状变异.
- 在骨视图和元素中,形状差异不一致.
- 2DGM成功地在所有视图和元素中区分了神秘的物种Lasiurus borealis和Lasiurus seminolus.
结论:
- 样本大小和2D视图/元素的选择对2DGM结果产生了重大影响.
- 没有一个单一的样本大小或视图是普遍最佳的;选择必须与研究问题保持一致.
- 建议使用各种参数进行初步分析,以获得可靠的2DGM结论.
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