PLASMA-GLUCOSE AND INSULIN CONCENTRATION IN TILAPIA AFTER ORAL-ADMINISTRATION OF GLUCOSE AND STARCH

Oral carbohydrate administration tests were performed in tilapia. Eith er glucose or starch in gelatin capsules were administrated orally aft er the tilapia were put on a fast for 24 h. Blood was sampled at selec ted time intervals from 1 to 12 h thereafter. The concentration of pla sma glucose of tilapia peaked at 3 h after oral ingestion of both carb ohydrates. Plasma insulin concentration in tilapia ingested with gluco se was higher (p<0.05) at Ih after oral administration than those inge sted with starch and the control group. Plasma insulin dilution curve of tilapia was parallel to the insulin standard curve of human beings.