The effect of hunger and satiety on swimming activity in the amphipod, Marinogammarus obtusatus Dahl

Abstract

1. 1. Food deprivation for 1–2 days reduced the swimming activity of Marinogammarus obtusatus only slightly; after a deprivation interval of 10–15 days the reduction in activity was significant. This decrease in activity was attributed to a deterioration in the animals' health. 2. 2. Feeding to satiety also caused a significant reduction in swimming activity. Here the effect was short term and reversible, and was interpreted as the result of inhibition.