EFFECT OF DIETS CONTAINING VARIOUS LEVELS OF PROTEIN AND ETHANOL COPRODUCTS FROM CORN ON GROWTH OF TILAPIA FRY

Experimental diets containing 32-40% protein and 16-49% corn gluten me al, corn gluten feed, or corn distillers' grains with solubles were fe d to tilapia with 0.4 g initial weight for 8 weeks in aquaria. Weight gain, feed conversion ratio, and protein efficiency ratio for experime ntal and control diets were in the range of 3270-5320%, 1.06-1.38, and 1.87-2.37, respectively. Statistically, the highest weight gain was a chieved from control diet and a 40% protein diet with 35% corn distill ers' grains with solubles; the best feed conversion ratio was obtained from control diet and two 40% protein diets with 35% corn distillers' grains with solubles or 30% corn gluten feed; the highest protein eff iciency ratio was from control diet and two 36% protein diets with 49% corn distillers' grains with solubles or 42% corn gluten feed.