Effect of super chilling on microbial load and chemical composition of Nile tilapia and Nile perch

Abstract

Eighteen samples, 9 Tilapia (Oreochromis niloticus), 120 “ 180 g and 9 Nile perch (Lates niloticus), 150 “ 200 g bought from Elmourada fish market were iced in thermostatic container and transported to the Sudan University of Science and Technology, College of Veterinary Medicine and Animal Production. The fish were  divided into two groups; one was filleted and packed in plastic bags, then placed in refrigerator, were stored for 7 days. The Second group was treated as fresh (control); finally, the whole samples were analyzed. From the statistical analysis there is no significant difference (P > 0.05) between fresh and frozen samples, and no significant difference (P > 0.05) between two species (Tilapia and Nile perch) in microbiology examinations while there is significant difference (P < 0.05) between freezing period in chemical composition, and no significant different (P > 0.05) between fish species in chemical composition.