UTILIZATION OF AMINO ACIDS IN NILE TILAPIA (OREOCHROMIS NILOTICUS) FRY. 3-UTILIZATION OF NON-ESSENTIAL AMINO ACIDS AS ENERGY SOURCE.
A.-S, GODA, A., EL-HUSSEINY, O., SULOMA, A. (2002). UTILIZATION OF AMINO ACIDS IN NILE TILAPIA (OREOCHROMIS NILOTICUS) FRY. 3-UTILIZATION OF NON-ESSENTIAL AMINO ACIDS AS ENERGY SOURCE.. EKB Journal Management System, 50(1), 77-85. doi: 10.21608/vmjg.2002.369212
A A.-S, GODA; O EL-HUSSEINY; A SULOMA. "UTILIZATION OF AMINO ACIDS IN NILE TILAPIA (OREOCHROMIS NILOTICUS) FRY. 3-UTILIZATION OF NON-ESSENTIAL AMINO ACIDS AS ENERGY SOURCE.". EKB Journal Management System, 50, 1, 2002, 77-85. doi: 10.21608/vmjg.2002.369212
A.-S, GODA, A., EL-HUSSEINY, O., SULOMA, A. (2002). 'UTILIZATION OF AMINO ACIDS IN NILE TILAPIA (OREOCHROMIS NILOTICUS) FRY. 3-UTILIZATION OF NON-ESSENTIAL AMINO ACIDS AS ENERGY SOURCE.', EKB Journal Management System, 50(1), pp. 77-85. doi: 10.21608/vmjg.2002.369212
A.-S, GODA, A., EL-HUSSEINY, O., SULOMA, A. UTILIZATION OF AMINO ACIDS IN NILE TILAPIA (OREOCHROMIS NILOTICUS) FRY. 3-UTILIZATION OF NON-ESSENTIAL AMINO ACIDS AS ENERGY SOURCE.. EKB Journal Management System, 2002; 50(1): 77-85. doi: 10.21608/vmjg.2002.369212

UTILIZATION OF AMINO ACIDS IN NILE TILAPIA (OREOCHROMIS NILOTICUS) FRY. 3-UTILIZATION OF NON-ESSENTIAL AMINO ACIDS AS ENERGY SOURCE.

Veterinary Medical Journal (Giza)
Volume 50, Issue 1, January 2002, Page 77-85  XML PDF (2.98 MB)
DOI: 10.21608/vmjg.2002.369212
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Authors
A A.-S, GODA* 1; O EL-HUSSEINY2; A SULOMA2
1National Institute of Oceanogrophy and Fisheries.
2Anim. Prod. Dept., Fac. Agric., Cairo Univ.
Abstract
An experiment was designed to find out the effect of the replacement of essential amino acids by non-essential amino acids as energy source at sev- en ratios (45%: 55% as a control, 50%: 50%, 40%: 60%, 35%: 65%, 30%: 70%, 25%: 75% and 20%: 80%, essential amino acid: non-essential amino acid,) respectively. The higher significant (P≤0.05) values of average final live body weight, average daily body gain, specific growth rate were observed for Nile tilapia fry fed diets con- taining ratios (50: 50), (45: 55) and (40: 60) (es- sential: non-essential amino acids) than the other treatments. Nile tilapia fry fed the diet containing ratios of (50:50), (45: 55) and (40: 60) (essential: non-essential amino acids) had the better-feed conversion ratio than other treatments. Protein efficiency ratio and nitrogen retention among differ- ent experiments decreased significantly (P≤ 0.05) with increasing dietary ratio of non-essential amiNo acids. This effect was moderate when 60% of dietary protein was substituted by non-essential amino acids, while ratio over than 65%, the val- ues were further reduced. Carcass crude protein was significantly (P ≤0.05) lowest when fish fed diet containing more than 60% non-essential ami- no acid. Carcass lipid content and gross energy content followed the opposite tendency.
Depending on the present data it is of interest to point out that, the dietary crude protein require- ment for tilapia can be reduced to the range of 12.2 15.7% when appropriate energy source that have metabolizable energy values equivalent to protein are used (for example, non-essential ami- no acids) to substitute dietary protein to levels of 30%, with metabolized energy density of 13.71 MJ and had a P/E ratio (CP/ME) of 22.40 g./MJ
The data confirmed that substitution of dietary protein nitrogen by non-essential amino acids
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