Establishing the optimum dietary essential amino acid pattern for silvery-black porgy (Sparidentex hasta) juveniles by deletion method

• Type: Article in International Scientific Journal
• Date: 2017

Authors

Marammazi, JG (Author) Other; Yaghoubi, M (Author) Other; Safari, O (Author) Other; Peres, H (Author) FCUP; Mozanzadeh, MT (Author) Other

Journal

Title: Aquaculture Nutrition

Vol. 23

Pages: 1483-1491

ISSN: 1353-5773

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 10 Citations

Scopus - 9 Citations

Other information

Authenticus ID: P-00N-5B1

DOI: 10.1111/anu.12524

Abstract (EN): A 6-week feeding trial was conducted to estimate the optimum dietary essential amino acid (EAA) pattern for silvery-black porgy juvenile based on the AA deletion method. Eleven isonitrogenous and isoenergetic diets were formulated containing 60% of fish meal nitrogen and 40% of crystalline AA nitrogen. In the control diet, the EAA profile was made similar to fish meal protein. Ten other diets were formulated similar to the control diet but replacing 40% of each EAA by a mixture of non-essential amino acids. Triplicate groups of fish (initial body weight of 4.7g) were handfed with the experimental diets, three times a day, to visual satiation, for 42days. At the end of the trial, final body weight of all EAA-deficient groups was lower than that of control group, ranging from 6.3% of reduction with arginine-deficient diet to 39.4% of reduction with lysine-deficient diet, relatively to the control group. Based on the relationship between nitrogen retention and EAA intake of the control and EAA-deficient diets, the optimal dietary EAA profile for silvery-black porgy juveniles was estimated to be (g 16/gN): arginine 5.3, lysine 6.0, threonine 5.2, histidine 2.5, isoleucine 4.6, leucine 5.4, methionine + cysteine 4.0 (in a diet containing 0.6 cysteine), phenylalanine + tyrosine 5.6 (in a diet containing 1.9 tyrosine), tryptophan 1.0 and valine 4.6.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9