<b>Effect of tannin on apparent digestibility of Nile tilapia, <em>Oreochromis niloticus</em></b> - DOI: 10.4025/actascianimsci.v26i2.1863

Abstract

This study was carried out in order to evaluate the effect of tannin (Dimorphandra mollis, Benth) on the apparent digestibility coefficient (ADC) of fish diets. It was analyzed the apparent digestibility of dry matter, crude protein and ether extract by Nile tilapia, Oreochromis niloticus L.. It were utilized 80 fish distributed in 5 groups, which were fed diets containing 0.0%; 0.23%; 0.46%; 0.69%; 0.92%; 1.37% and 1.82% of total tannin. After a acclimatization period of three days, representative samples of feces were obtained daily until reach five replicates each treatment. The ADC was calculated based on chemical analysis of diets and feces to determine chemical composition and chromic oxide. It was concluded that to Nile tilapia the presence of tannin on concentration similar or higher than 0.46% on diet, interfere on the apparent digestibility of dry matter and crude protein and tannin prejudice significantly the apparent digestibility of ether extract when the concentration is bigger than 0.23%.