高山姬鼠(Apodmus chevrieri)种群年龄结构的判别模型

Discriminatory Model of the Age Structure of Apodmus Chevrieri Population

利用高山姬鼠(Apodmuschevrieri)头骨度量的8项指标:颅全长X1,颅基长X2,基底长X3,颧宽X4,眶间宽X5,齿隙长X6,上裂齿长X7和门齿孔长X8,应用多元统计分析方法,建立了其种群年龄结构的判别函数:Y1=81 16X1-1001 78.Y2=88 71X1-1194 69.Y3=93 42X1-1324 81.Y4=96 92X1-1427 00.Y5=102 22X1-1586 28.将头骨的度量X1分别代入方程计算,若Yi=Ymax(Y1,Y2,Y3,Y4,Y5),则高山姬鼠于Yi年龄组.

According to the eight factors of the skull of the Apodmus Chevrieri X_1-the maximum cranial length; X_2-the basis length; X_3-the basialvedor length; X_4-the bizygomatic breadth; X_5-the interorbital breadth; X_6-the diastema length;X_7-the length of the upper carnassial tooth; X_8-the length of insisor foramen, based on the multivariate statistical analysis, we have got the discriminatory models on age structure of the Apodmus Chevrieri Population:Y_1=81.16X_1-1001.78,Y_2=88.71X_1-1194.69,Y_3=93.42X_1-1324.81,Y_4=96.92X_1-1427.00,Y_5=102.22X_1-1586.28,Substitute the factor X_1 into these models and calculate, if Y_i=Ymax{Y_1,Y_2,Y_3,Y_4,Y_5},then the Apodmus Chevrieribelongs to the Y_i age group.