Resumo

PEREA ROMAN, Críspulo et al. Evaluation of processes to obtain silage of fish residues in animal feed. Ciencia en Desarrollo [online]. 2017, vol.8, n.2, pp.39-50. ISSN 0121-7488.

The study evaluated processes to obtain silage of rainbow trout (Oncorhynchus mykiss) as an alternative in animal feed. Eight treatments were used: four chemical silages, whole viscera with formic acid, whole viscera more acetic acid, viscera milled with formic acid, viscera milled more acetic acid and four biological: whole viscera more molasses, whole viscera with cassava meal, milled viscera more molasses and viscera milled with cassava meal. The design was completely random. The determined variables were pH, titrated acidity, consistency, microbiological profile and nutritional characterization by chemical composition analysis and in vitro digestibility tests. The pH in the treatments with addition of formic acid presented lower values (3.26); Titrated acidity in treatments including molasses generated higher percentages (3.78 and 3.56%), Silages prepared with whole viscera achieved a higher degree of liquefaction (9.75 - 20.38 cm / 30s), The in vitro digestibility of dry matter of silage was above 96%, equivalent to that found in fish meal. Silages are an alternative of good quality for animal feed due to the content of nutrients that they present.

Palavras-chave : Nutritional characterization; biological silage; chemical silage; fish waste.

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