International Journal of Agricultural Policy and Research
Vol.2 (7), pp. 273-280, July 2014
Article 14/ID/ JPR099, 07 pages
Copyright © 2014 Author(s) retain the copyright of this article. Author(s) agree that this article remain permanently open access under the terms of the Creative Commons Attribution License 3.0 International License
Original Research Paper
Seasonal variations in proximate and fatty acid composition of golden grey mullet Liza aurata (R, 1810) from the Tunisian coast
Accepted 23 June, 2014
Ilhem Ketata Khitouni1, Nourhène Boudhrioua Mihoubi2, Abderrahmen Bouain1 and Faouzi Ben Rebah3*
1UR Biodiversité et Ecosystèmes Aquatiques, FSS, Sfax, Tunisia.
2UR Ecophysiologie et Procédés Agroalimentaires, ISB-Sidi Thabet, Tunisia.
3Laboratoire de Biochimie et de Génie Enzymatique des Lipases, ENIS, Sfax-Tunisia.
* Corresponding Author Email: benrebahf(at)yahoo.fr
The aim of this work was to determine the seasonal variations of chemical composition of Liza aurata of the coastal catch from the Gabes Gulf, Tunisia. Maximal water were reached in July for females (77.89 ± 0.27 mg / 100 g of fresh fish) and in May for males (77.68 mg / 100 g of fresh fish). Minimal water values were reached during September for both females and males (63.77 ± 0.45 and 64.86 ± 0.16 mg /100 g of fresh fish, respectively). Negative correlations between fat and water contents were observed. The higher fat contents were recorded during September for males and females (10.13 ± 0.07 % and 15.07 ± 0.12 mg / 100 g of fresh fish, respectively). Higher protein contents were observed over the year (except May, July and August for males and after the spawning period for females, from July to September). Palmitic acid was the most abundant fatty acid ranging from 20.03% to 31%, apart from the female in summer where oleic acid and palmitic acid were estimated at 28.98 and 23.35%, respectively. Oleic acid was the main unsaturated fatty acid, ranging from 13.36% to 28.98%. Liza aurata muscle contained appreciable levels of Omega-3 polyunsaturated fatty acids (14.47 % – 23.23 %) suggesting the use of this fish as a source of healthy diet for humans.
Key words: water, fat, protein, mineral element, fatty acids, fish muscle, Liza aurata.