Objective To explore the physiological factors affecting the sleep duration of Drosophila melanogaster.Methods Canton-S wild type Drosophila was chosen as the experimental object,and the sleep duration of Drosophila was determined by an infrared activity monitoring system(DAMS).Sleep was defined as any period of uninterrupted behavioral immobility lasting longer than 5 minutes.All the immobility time was counted together as the sleep duration during 24 hr.Drosophila of the same age(7-day old) and different ...