Adult locomotor activity levels (average beam crosses per 10 min bin ± SEM) and bout analysis of Canton-S, perS, and perL, in LD and DD, under the differing ethanol treatment conditions. On average, perS exhibit higher locomotor activity than perL, manifesting itself in more beam crosses per bin and longer bouts in both LD and DD. There are no differences in the number of bouts between perS and perL in LD, but perL showed increased number of bouts per day in DD compared to perS. There is no effect of ethanol on the activity amongst individual genotypes for overall activity levels, length of bout, beam crosses per bout, or number of bouts per day in LD or DD, excepting that perL receiving larval 10% ethanol showed increased number of bouts per day compared to control perL in DD only. Values with differing letters (a, b, c) are significantly different (p<0.05).