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运用传统形态测量方法和地标点方法对广东阳江和湛江两个短吻鲾的形态特征进行了分析。传统测量方法的主成分分析的前两个主成分(76.29%)能明显地区分出两个种群。相对扭曲主成分分析前3个主成分(64.03%)也能明显地区分出两个种群,但效果差于传统方法的主成分分析。网格变形图显示,两地短吻鲾的形态差异主要表现在头部。地标点法避免了传统的多变量形态测量方法的信息冗余、包含的形状信息不够完整等问题,并能够重建图形,突出局部的形变,能够直观地比较出研究对象之间的细微差别。研究亮点:地标点法是国外最新发展出并被广泛使用的形态测量方法,该方法以地标点的坐标来表示生物的形状信息,再通过旋转与重叠,用网格图形和相对扭曲分析样本间的形状差异。本文在国内首次使用该方法有效地区分了短吻鲾的不同地方种群。
Morphological characteristics of two short-nosed 鲾 阳 of Yangjiang and Zhanjiang in Guangdong Province were analyzed by traditional morphological measurement and landmark-point method. The first two principal components (76.29%) of the principal component analysis of traditional measurement methods can clearly distinguish two populations. Relatively distorted principal component analysis of the three main components (64.03%) can also be clearly distinguished from the two populations, but the effect is worse than the traditional method of principal component analysis. Mesh deformation map shows that the morphological differences between the two short 鲾 主 mainly in the head. The landmark point method avoids the information redundancy of the traditional multivariable morphological measurement method and the incomplete inclusion of the shape information, and can reconstruct the figure, highlight the local deformation, and visually compare the nuances of the study objects. Research highlights: The landmark point method is a newly developed and widely used morphological measurement method in foreign countries. This method uses the coordinates of the landmark points to represent the biological shape information, and then analyzes the shape of the object through the rotation and overlap, the grid graph and the relative distortion The difference in shape. This method is the first time that this method has been used in China to effectively distinguish different populations of Castanopsis carlesii.