Abstract
The change of activity associated with food deprivation in non-diapausing Cletus punctiger adults was studied with an actograph equipped with an infrared photo-electric switch. The activity was recorded and expressed as the number of intercepts of infrared beam. When the food was continuously available, the daily activity was low and there were few changes depending on the age. Also differences between the sexes were not conspicuous. The daily activity increased in the females soon after deprivation of food and it decreased soon after the food supply was resumed. This phenomenon was remarkable in the females more than 20 days after adult molt. The longer the time interval after food deprivation, the higher the activity in the photophase, especially in the latter half of the photophase. The activity in the scotophase was always low regardless of the presence of food.
