Specific dynamic action (SDA) in the supralittoral isopod, Ligia pallasii: Effect of ration and body size on SDA

Abstract

1. 1. Ration and body size effects on specific dynamic action (SDA) were investigated in the supralittoral isopod Ligia pallasii using seaweed and chemical diets. 2. 2. SDA increased asymptotically with ingested meal size for all diets. 3. 3. Body weight had a significant positive effect on SDA for only one of the six diets tested, but weak tendencies were present in the data for the other diets. 4. 4. SDA appeared to increase geometrically with increasing concentration of amino acids at high ration levels.