Effect of partial replacement of dried, wet cull dates and date pits instead of yellow corn, supplemented with feed additives on growth performances of Nile tilapia (Oreochromis niloticus).
Mabrouk, H., Zaki, M., Nour, A., Labib, E. (2011). Effect of partial replacement of dried, wet cull dates and date pits instead of yellow corn, supplemented with feed additives on growth performances of Nile tilapia (Oreochromis niloticus).. EKB Journal Management System, 15(2), 207-234. doi: 10.21608/ejabf.2011.2090
Hafz Mabrouk; Mohamad Zaki; Abd El-Aziz Nour; Eman Labib. "Effect of partial replacement of dried, wet cull dates and date pits instead of yellow corn, supplemented with feed additives on growth performances of Nile tilapia (Oreochromis niloticus).". EKB Journal Management System, 15, 2, 2011, 207-234. doi: 10.21608/ejabf.2011.2090
Mabrouk, H., Zaki, M., Nour, A., Labib, E. (2011). 'Effect of partial replacement of dried, wet cull dates and date pits instead of yellow corn, supplemented with feed additives on growth performances of Nile tilapia (Oreochromis niloticus).', EKB Journal Management System, 15(2), pp. 207-234. doi: 10.21608/ejabf.2011.2090
Mabrouk, H., Zaki, M., Nour, A., Labib, E. Effect of partial replacement of dried, wet cull dates and date pits instead of yellow corn, supplemented with feed additives on growth performances of Nile tilapia (Oreochromis niloticus).. EKB Journal Management System, 2011; 15(2): 207-234. doi: 10.21608/ejabf.2011.2090

Effect of partial replacement of dried, wet cull dates and date pits instead of yellow corn, supplemented with feed additives on growth performances of Nile tilapia (Oreochromis niloticus).

Egyptian Journal of Aquatic Biology and Fisheries
Article 6, Volume 15, Issue 2, April 2011, Page 207-234  XML PDF (231.13 K)
Document Type: Original Article
DOI: 10.21608/ejabf.2011.2090
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Authors
Hafz Mabrouk1; Mohamad Zaki2; Abd El-Aziz Nour2; Eman Labib3
1National Institute of Oceanography & Fisheries, Alexandria, Egypt
2Animal production Dept., Faculty of Agric. Alex. Univ. Alex., Egypt
3Animal Production Research Institute, Agriculture research Center, Dokki, Giza, Egypt.
Abstract
A12-week feeding trials were conducted to evaluate the nutritive value of two forms of palm cull date and date pits as energy sources, supplemented with feed additives (Phytogenics), to be partially replaced (13.5%) yellow corn
in feeding Nile tilapia fingerlings. Twelve experimental isonitrogenous (30.43% crude protein), isocaloric (436.43 kcal GE 100g-1) experimental diets were formulated taking into account energy sources and feed additives. Concerning
energy source, four experimental diets were formulated which contain: yellow corn (YC) as control diet, dried cull date (DCD), wet cull date (WCD) and date pits (DP). As for feed additives (flavorings), three dietary sub-groups were builtup
in each group to include: zero additives, 0.03 % Digestarom® (DG) and 0.03 % Marjoram leaf extract (MLE). Ten fingerlings (10.55 ± 0.30 g) were stocked/aquarium; two replicates per treatment and fed twice daily (six days) at
3% of body weight for 84 days.
The results indicated that the partial replacement (13.5%) of WCD instead of YC supplemented with or without feed additives increased fish specific growth rate and feed utilization. However, replacement either DCD or DP
decreased tilapia performances; meanwhile DP recorded the worst values. On the other hand, DG supplementation improved fish performances either fed WCD-based diets or control diets (YC). It could be concluded that wet cull date
may be cost-effective when partially replaces yellow corn in tilapia diets as energy source, and improves fish performances when supplements with 0.03 % Digestarom®.
Keywords
Cull Date; Date pits; phytogenic; additives; Growth performance; feed utilization; Oreochromis niloticus
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