Influence of Dietary Inclusion of Full-Fat Soybean Meal and Amino Acids Supplementation on Growth and Digestive Enzymes Activity of Nile Tilapia, Oreochromis niloticus.
Abdualla1, Abdel-Wahab Abdel-moez Abdel-Warith1,*, Elsayed Mohammad Younis1, Al-Asgah, Nasser . 2013
The influence of replacing diet fish meal LT94 (FM) with different levels of full fat soybean meal (FFSB) on growth
performance and enzymes activity in stomach, hepato-pancreas and intestine were investigated for Nile tilapia Oreochromis
niloticus. Four diets (D1, D2, D3 and D4) were formulated 0, 15, 20, and 20 g/100 protein of diets + DL-methionine by
replacing FFSB with fish meal respectively. Proximate composition of the diets was determined. The growth of O. niloticus
was significantly decreased (P<0.05) with substitution of fish meal by FFSB (D2, D3 and D4) compared to the control group
(D1). The lowest weight gain (46.02±1.30 g), specific growth rate (SGR: 2.29%±0.03), protein efficiency ratio (PER:
2.25±0.04) and apparent net protein utilization (ANPU: 36.37%±0.29) were achieved at D4. Regression analysis did not show
a significant differences (P>0.05) for proteolytic and trypsin activities in the intestine and stomach among the data of all fish
groups. However, hepato-pancreas proteolytic and trypsin activities showed significant decrease (P<0.05) with increase of
FFSB magnitude in the diets. Activity of amylase and lipase in hepato-pancreas, stomach and intestine displayed significant
differences (P<0.05) between control group and fish of the tested diets groups. The carcass composition of fish did not exhibit
a significant difference.
