Global Advanced Research Journal of Agricultural Science (GARJAS) ISSN: 2315-5094
February 2015 Vol. 4(2): pp. 075-088
Copyright © 2015 Global Advanced Research Journals
Full Length Research Paper
Effect of Β-Mannanase Supplementation on the Growth and Apparent Digestibility of Red Tilapia Fed Formulated Diets Containing Palm Kernel Cake
Mohamad Siti-Noritaac, Ariff Arbakariyab, Ibrahim Noor-Azlinac, Che Omar Ibrahimc
aFreshwater Fisheries Research Division, FRI Glami Lemi, Titi, 71650 Jelebu, Negeri Sembilan, Malaysia.
bDepartment of Bioprocess Technology, Faculty of Biotechnology & Biomolecular Sciences, Universiti Putra Malaysia, Serdang, Selangor, Malaysia.
cFaculty of Agro Based Industry, Universiti Malaysia Kelantan, Jeli, Kelantan, Malaysia.
*Corresponding Author’s Email: email@example.com;
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Accepted 10 February, 2015
This study was conducted to evaluate the influence of β-mannanase supplementation on the growth performance, apparent nutrient digestibility (ADCs), meat and carcass content in tilapia fed palm kernel cake (PKC). Three diets containing 40% PKC supplemented with 1% freeze dried β-mannanase (FD), and 1% Hemicell® (Hemi); and control without enzyme inclusion. The final body weight, weight gain, and FCR were significantly different (P<0.05) in tilapia fed control diet compared to diet containing enzyme. β-Mannanase supplementation led to an increase (P<0.05) in the ADCs of crude protein, ash and fiber compared with the control. Dietary treatment had significant effects (P<0.05) only on fat composition in meat quality in the fish fed FD diet had lower than the other treatments. In conclusion, supplementation of diet containing PKC with β-mannanase could improve the growth performance, energy, and nutrient digestibility of tilapia, thus increasing the nutritional value of PKC as potential feed ingredients.
Keywords: Digestibility; palm kernel cake; tilapia; β-mannanase.
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