Resumo

PEREA-ROMAN, CRÍSPULO et al. ECONOMIC VALUATION OF SILAGE WITH FISH FARMING RESIDUES IN Oreochromis spp FOOD. Rev.Bio.Agro [online]. 2018, vol.16, n.1, pp.43-51. ISSN 1692-3561.  https://doi.org/10.18684/bsaa.v16n1.623.

Feeding in fish farming systems accounts for between 50% and 70% of production costs, with fishmeal being the most widely used animal protein source; therefore, lower-cost protein alternatives should be sought to improve profitability. The objective was to economically evaluate the use of chemical silage of trout viscera (CSTV) in the diet of red tilapia (Oreochromis spp), in four balanced diets so: T1 (control) and with inclusion of CSTV, T2 (10%), T3 (20%) and T4 (30%), supplied to 128 juveniles of red Tilapia with an average weight of 142,14 ± 4,74 g. The conversion rates and economic profitability rates were evaluated, as well as partial budget analysis. There were significant differences (P<0,05) for the economic conversion index, economic profitability index, net profit, net profit increase and the marginal rate of return according to the level of inclusion of CSTV. It was evidenced that to include 20% of silage in the diet, it obtains greater economic retribution associated to the cost of the feeding per kilogram of meat of fish produced.

Palavras-chave : Economic conversion index; Economic profitability index; Net profit; Trout viscera; Red tilapia.

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