Effect of Shrimp Head Silage Hydrolysate and Distiller's Dried Corn Grain on Digestibility and Growth of Red Tilapia (Oreochromis mossambicus)

We studied the effect of shrimp head silage protein hydrolysate (SHSP) and distillers dried corn grain (DDCG) as ingredients on the digestibility of diets for Oreochromis mossambicus. Three diets containing 30% protein, 10% lipid, and 4.9 kcal/g calorific value were prepared: a reference diet and two based on the inclusion of 84.0% of the reference diet, 15% of SHSP or DDCG, and 1% of chromic acid as a marker. Six fish (45.5±2.5g) were introduced in each culture unit (60 L). There were significant differences (P<0.05) for the apparent dry matter digestibility among the diets. The SHSP diet obtained the higher dry matter digestibility (86.33±0.8%). While, no differences (P<0.05) in the apparent protein digestibility were observed among the diets and ingredients. The mean final weight (58.77±3.8g) was similar for the three experimental treatments. It can be conclude concluded that the red tilapia is able to efficiently consume diets containing these animal and plant-derived ingredients.