latitudinal clines for morphometrical traits in drosophila kikkawai: a study of natural populations from the indian subcontinent. | natural populations of drosophila kikkawai were collected in india and sri lanka, along a latitudinal transect ranging from 6.8 degrees to 31.8 degrees n latitude. six morphometrical traits were analysed: wing and thorax length, body weight, ovariole number, and abdominal and sternopleural bristle numbers. significant clines were observed for the three-size related traits and for ovariole number, corresponding to a regular increase in the mean value with latitude, but not for bristle numbers. du ... | 1998 | 9674381 |