PNEAPLE, MANGO AND PASSION FRUIT BY-PRODUCT BRANS DIGESTIBILITY BY TAMBAQUI (Colossoma macropomum)

Abstract

The purpose of the study was to estimate de digestible values of nutrients and energy of fruit pulp byproducts (pineapple, mango and passion fruit) through determining their respective apparent digestibility coefficients (CDAs). Experimental animals (Seventy-two tannbaqui juvenile, average weight 70,5 +/- 15,5g) were confined in 12 feeding tanks (water volume 1m3) in a completely ranndonn distribution with three repetition per treatment. In order to obtain digestible values of the byproducts four experimental feeds were produced: Basal, Pineapple (30% pineapple pulp production byproduct + 70% Basal feed), Mango (30% mango pulp production byproduct + 70% Basal feed) and Passion fruit (30% passion fruit pulp production byproduct + 70% Basal feed). Experimental fish were kept in feeding tanks during the day where they were fed ad libitum at: 9am, 11am, 2pm, 3pm, 4pm and 5pm. At 6pm fish were transferred to conic 200L water tanks adapted to precipitation of solids where they were stayed until feces collection in the following morning. Apparent digestible coefficients of pineapple, mango and passion fruit byproducts were, respectively: 57.26; 69.65 and 30,48% for dry matter; 82.26; 66.61 and 86.07% for crude protein; 53.25; 57.21 and 19.94% for crude energy. Digestible energy low values, of passion fruit byproduct in special, allied to high levels of fiber may represent limiting factors to the usage of those ingredients in commercial fish feeds.