太行山猕猴跖骨性差

以39例成年太行山猕猴跖骨为标本(27雌,12雄),测量每根跖骨7个变量,采用SPSS 20.0进行数据分析,用7个跖骨变量建立逐步判别函数.选择性差最大的变量直接进行判别分析.结果表明,大部分变量性差显著(P<0.01),侧别差异很小.逐步判别分析选择出来的最好变量是跖骨长度.雄性判别率为78.6%⁹2.9%,雌性判别率为79.3%92.9%,雌性判别率为79.3%⁹3.1%,平均判别率为79.1%93.1%,平均判别率为79.1%⁹3.0%.交互检验比回代检验判别率略微低一些.结果显示用跖骨长度变量可以很好地鉴定性别.

Sex Dimorphism of Metatarsal of Macaca Mulatta

Determination of sex using metatarsals was carried out on a sample of 39 skeletons from the Taihang Mountains(12 males and 27 females). Seven measurements were taken on each metatarsal. Statistical analyses were performed using SPSS version 20. 0. Stepwise discriminant functions were performed using seven metatarsal variables.Only those variables that best distinguished between the sexes were selected and subjected to direct discriminant analysis. Statistically significant differences between sexes were found(p < 0. 01) in most dimensions,but with no significant difference in the measurements between right and left metatarsals in either sex. In the stepwise discriminant functions the best variable selected was metatarsal length. Overall accuracies of the functions ranged from 79. 1% to93. 0%,with correct sex assignment ranging from 54% to 89% for the male to 89% to 94% for the female for the original data,dropping slightly for cross-validation. The results showed that measurements of the metatarsals appear to be good discriminators of sex.