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Abstrait
Growth Response of Nile Tilapia (Oreochromis niloticus) Fries Fed on Silage-based Diets
Gutema B*, Yimer A, Hailemichael F
Fish silage was prepared by minced fish body leftovers by adding formic acid and formulated with other plant sources. The silaging process was completed after 48 days and incorporated into the experimental diets. The growth trial was conducted to investigate the effect of silage incorporation in the diets of Nile tilapia (Oreochromis niloticus L.) fries. Three dried diets containing (T1) 0, (T2) 20, (T3) 30 were prepared with 30% crude protein and the experiment was conducted in 12 glass aquaria with a stocking density of 30 fish/aquarium for 16 weeks. Results indicated that Non-significant differences in WG, FCR, and SGR of O. niloticus were observed between T2 and T3 diets. The least growth performance was recorded in T1 and it was significantly different (P < 0.05) with T2 and T3. The fries fed on silage incorporation were the best survival rate (100%) but the fries that fed without silage had less survival rate (83.3%). This indicates fish silage was the best feed for O. niloticus growth and survival rate at an early stage. Under the present study condition, incorporation of fish silage at 20% inclusion in the diets of O. niloticus fries is better and further study is necessary for different inclusions.