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:;

Tel: +606133023; Fax: +606138352.


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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