Pelleting and extrusion effects on the digestibility of alternative ingredients in Northeast Semi-arid for Nile tilapia

Lilian Dena dos Santos, Sília Maria de Negreiros Sousa, Lilian Carolina Rosa da Silva, Robie Allan Bombardelli, Fábio Meurer

Abstract


The apparent digestibility of nutrients and energy from cassava (RM), goats / sheep by products meal (FR) and maniçoba hay meal (FM) was evaluated for Nile tilapia in feed processing, as palletized and extruded form. The apparent digestibility of crude protein and energy for the RM, FR and FM in pelletized diets were respectively 77.97 and 65.86%, 93.79 and 88.62%, 54.62 and 28.64%. The apparent digestibility of crude protein and energy for the RM, FR and FM in extruded feeds were respectively 83.98 and 81.77%, 62.55 and 89.81%, 52.73 and 28.09%. The extrusion contributed to the improvement of energy digestibility of the RM, but reduced the apparent digestibility of the protein fraction of FR. The values of digestible nutrients in the present work, regardless of the processing, suggest a good potential for the use of cassava flour and goats/sheep by products meal in the composition of diets for Nile tilapia, unlike hay maniçoba hay meal.


Keywords


Feed evaluation; Fish nutrition; Oreochromis niloticus; Feed processing.



DOI: http://dx.doi.org/10.5433/1679-0359.2014v35n6p3367

Semina: Ciênc. Agrár.
Londrina - PR
E-ISSN 1679-0359
DOI: 10.5433/1679-0359
E-mail: semina.agrarias@uel.br
Este obra está licenciado com uma Licença Creative Commons Atribuição-NãoComercial 4.0 Internacional