Gastric evacuation of a single meal of zooplankters by young yellow perch was about half as fast as that of a similar meal under conditions of continuous feeding. Time for gastric evacuation of a single meal of 150 to 200 daphnids by 60-mm perch at 15 C was 12 hours compared to only 6 hours for a similar meal under conditions of continuous feeding. Likewise, 30- to 40-mm perch fed 10 daphnids at 22 C required 6.5 and 1.5 hours respectively for single and multiple meals.