@article{oai:ir.kagoshima-u.ac.jp:00002319, author = {TESHIMA, Shin-ichi and KANAZAWA, Akio and UCHIYAMA, Yoshihiro}, issue = {1}, journal = {鹿児島大学水産学部紀要=Memoirs of Faculty of Fisheries Kagoshima University}, month = {2016-10-27}, note = {Feeding trials using purified diets, designed as two-way layout experiments, were performed to clarify the optimum dietary protein level for Tilapia nilotica fingerings when they were reared with casein-gelatin (3:1) diets with two digestible carbohydrate levels (30% and 40%). Regardless the digestible carbohydrate levels examined, the weight gain and feed conversion efficiency (FCE) of the fingerlings improved with increasing protein levels from 25% to 35%, whereas the protein efficiency ratio (PER) leveled off within the range of 25% to 35% protein levels and decreased with increase of protein levels from 35% to 40%. The digestible carbohydrate levels had no significant effects on the weight gain, FCE, and PER of T.nilotica. These results indicate that T.nilotica fingerlings grow optimally on diets containing about 35% protein when diets contain 12% lipids and 30—40% digestible carbohydrate.}, pages = {45--52}, title = {Optimum Protein Levels in Casein-Gelatin Diets for Tilapia nilotica Fingerlings}, volume = {34}, year = {} }