Title of article :
Effect of Different Levels of Dietary Supplementation of Saccharomyces cerevisiae on Growth Performance, Feed Utilization and Body Biochemical Composition of Nile Tilapia (Oreochromis niloticus) Finge
Author/Authors :
Asadi Rad، Mohammad نويسنده Department of Fisheries, Faculty of Marine Natural Resources, Khorramshahr University of Marine Science and Technology, Khorramshahr, IR Iran. , , Zakeri، Mohammad نويسنده Fisheries Department, Faculty of Marine Natural Resources, Marine Science and Technology University, Khoramshahr , , Yavari، Vahid نويسنده Department of Fisheries, Faculty of Marine Natural Resources, Khorramshahr University of Marine Science and Technology, Khorramshahr, IR Iran , , Mousavi Shahroudi، Seyed Mohammad نويسنده Faculty of Industrial Engineering and Management Shahrood University of Technology, Shahrood, Iran ,
Abstract :
This study was conducted to evaluate the effect of different levels of dietary supplementation of
Saccharomyces cerevisiae on growth performance, feed utilization and body biochemical composition of
Oreochromis niloticus fingerlings. Four diets containing supplementation at levels of 0, 0.5, 1 and 2 g kg?1
were fed to fingerlings of Nile tilapia (5.01±0.21 g) in four replicate tanks twice daily to apparent satiation
for 56 days. Growth performance increased significantly (P < 0.05) with the increase in dietary yeast levels.
The highest growth was obtained at 1.0–2.0 g yeast kg?1 diet. The lowest feed conversion ratio was
obtained at 2.0 g yeast kg?1 diet. Linear relationship was found between dietary supplementation levels
and protein efficiency ratio. Hepatosomatic index did not display any significant difference among the
treatments. Whereas, Viscerosomatic index of O. niloticus fingerlings was significantly (P < 0.05) affected
by various supplementation levels. S. cerevisiae quantity significantly (P < 0.05) affected whole fish body
composition except for moisture and ash, which did not differ. The results of the present study indicated
clearly that the supplementation of S. cerevisiae (1.0 g yeast kg?1 diet) enhanced the growth performance
and feed utilization of O. niloticus fingerlings.
