Monitoring of lipid profile and seasonal variation in fatty acids composition of the mantis shrimp Squilla mantis (crustacea: Stomatopoda) from the gulf of Tunis (Tunisia) [Suivi du profil lipidique et variation saisonnière des acides gras de la squille Squilla mantis (crustacea: Stomatopoda) du golfe de Tunis (Tunisie)]
Mili S.,Institute Superieur Of Peche Et Daquaculture Of Bizerte |
Mili S.,Institute National Des Science Et Technologies Of La Mer |
Bouriga N.,2092 Campus University |
Ennouri R.,Institute National Des Science Et Technologies Of La Mer |
And 2 more authors.
Bulletin de la Societe Zoologique de France | Year: 2012
The spot-tail mantis shrimp, Squilla mantis (L., 1758) (Crustacea: Stomatopoda), is an abundant along the Tunisian coasts, especially in the Gulf of Tunis. This species has little economic importance in the Tunisian markets, but its abundance in the gulf of Tunis makes it a relatively important for fisheries. Squilla mantis is one of the most dominant species in the demersal crustacean fauna of the Gulf of Tunis. In spile of the importance of S. mantis fisheries, no investigation has focused on the biology and biochemical composition of this species on the Tunisian coast. The beneficial effects of crustacean consumption on human health has been related, among other factors, to the high content of n-3 (or ω3) fatty acids, especially eicosapentaenoic acid (C20:5n-3) and docosahexaenoic acid (C22:6n-3). Despite the numerous studies on molecular and biological composition of S. mantis, no detailed biochemical studies of the lipid and fatty acids contents of this crustacean had been carried out previously in Tunisia. The aim of this study was to describe the fatty acid profile of the spot-tail mantis shrimp, Squilla mantis, in the Gulf of Tunis. Lipid levels of displayed pronounced seasonal fluctuations, with the highest value in March and the lowest value in May. Major fatty acids in muscle tissue were C14:0, C16:0, C18:0, C18:ln-9, C18:2n-6, C18:3n-3, C20:4n-6, C20:5n-3 and C22:6n-3. The proportion of saturated and mono-unsaturated fatty acids was greater than that of polyunsaturated fatty acids (PUFA). Docosahexaenoic acid (DHA), linoleic acid (LA) and eicosapentaenoic acid (EPA) were the most abundant polyunsaturated fatty acids (PUFAs) in the muscle tissue of this species. The highest percentages for EPA and DHA were found in spring for Squilla mantis in the Gulf of Tunis. The n-3/n-6 fatty acids ratio in Squilla mantis can be significantly influenced by spawning and season. It is concluded that the mantis shrimp is a particularly healthy item in the human diet during spring period, when balanced n-3/n-6 ratios and EPA and DHA levels are considered.
Ghouaiel S.,2092 Campus University |
Bouriga N.,2092 Campus University |
Bouriga N.,Institute Superieur Of Peche Et Daquaculture Of Bizerte |
Lamouchi W.,Institute Superieur Of Peche Et Daquaculture Of Bizerte |
Trabelsi M.,2092 Campus University
Journal of Biological Sciences | Year: 2013
The objective of this study is to investigate the modifications made by smoking on hygienic and sensory quality of freshwater fish: Zander. Zander fillets were divided into two groups, the first was hot smoked while the second was cold smoked. Sensory attributes were evaluated by hedonic test and triangular test while the hygienic quality was assessed by research and monitoring of certain bacteria. Sensory analysis showed that the smoking process improve the organoleptic quality of this freshwater fish. Furthermore, distillate thyme addition's contributes to the development of superior taste, especially in the case of cold smoking. The microbiogical results showed that the fresh sample bacterial populations charges' are reduced after smoking processes from 0.5-2.5 ULog. During storage, lactic acid bacteria inhibited after hot smoking, weren't detected during storage. The proliferation of Staphylococci slowed for hot smoked fish fillets with the addition of the distillate. But, a significant proliferation of coliforms (>3 U Log) was noted all processes combined. © 2013 Asian Network for Scientific Information.