五种迁飞蛾类及非迁飞近似种前翅形状的数值分析

以翅面正投影周缘曲率为指标，对五种蛾类迁飞昆虫及与其近似的非迁飞昆虫的前翅翅形进行数值分析。结果表明，二者之间存在可以相互区别的差异：迁飞种类前翅前缘较平直，特别是前缘1/2处到翅尖的平均曲率绝对值显著小于非迁飞种类；而后缘1/2处到翅尖的平均曲率绝对值偏大，即这段后缘较弯曲，向外凸出，使翅外侧较宽阔。这种翅形特征较适合于利用气流进行远距离迁飞

Numerical analysis on wing-form of five migratory moths and non-migratory similar species

The forewing forms of five species of migratory moths, Mythimna separata,Helicoverpa armigera,Cnaphalocrocis medinalis,Loxostege sticticalis and Agrotis ypsilon, and some species similar to them were analyzed numerically with their geometrical projections.Cluster analysis on their curvatures showed that these migratory moths could be clustered to the same group and distinguished from their similar species,respectively.Discriminant analysis further demonstrated divergence of wing forms between migratory moths and non\|migratory species.The forewing costal margin of migratory moths,especially the part from the middle of it to the wing\|tip,is straighter than that of non\|migratory species,and its outer area seems to be relatively wide.Such wing characteristics are more suitable for them to make a long\|distance migration by airflow.