Sensory, Biochemical and Microbiological Changes of Farmed Catfish (Clarias batrachus, Linnaeus) and Red Tilapia (Oreochromis sp.) at Ambient Storage

Abstract

Farmed catfish (Clarias batrachus, Linnaeus) and red tilapia (Oreochromis sp.) were stored at ambient temperature (28±2°C) for a period of 24 h. They were evaluated for acceptability, freshness deterioration, rancidity development and microbiological changes. Raw catfish was acceptable up to 20 h and that of tilapia up to 15 h. Upon rejection their KJ values were 70.0 and 42.7% for tilapia and catfish respectively. Microbiologically, catfish samples did not exceed the 107 cfu/g limit until the end of the storage period; however, tilapia was not acceptable by the 20th hour.