Resumo

GARCES, Y J.; PEREA, C.; VIVAS, N. J.  e  HOYOS, L.. Obtaining and evaluating hydrolyzed protein concentrate from animal waste as a feeding alternative in Piaractus brachypomus (Cuvier 1818). Rev. Med. Vet. Zoot. [online]. 2021, vol.68, n.3, pp.223-235.  Epub 10-Jun-2022. ISSN 0120-2952.  https://doi.org/10.15446/rfmvz.v68n3.99930.

The aquaculture industry aims to find new strategies to replace fishmeal in formulated diet-sources with high attraction and palatability and high biological value to replace conventional sources. Due to the nutritional potential of animal by-products, technologies have been adopted for their use, such as bioconversion techniques by enzymatic hydrolysis. Consequently, the objective of this study was obtaining and evaluating a hydrolyzed protein concentrate of animal waste (CPHRA, by its Spanish acronym) in diets for Piaractus brachypomus. Viscera from poultry by-products was evaluated by using formic acid and a 20% trout viscera to promote the catalyst at lower pH (3,66). The resulting product was used in feed formulation to determine the Apparent Digestibility Coefficient (ADC) of energy and nutrients, using a control diet (T0) and three diets with 10%, 20%, and 30% CPHRA (T1, T2 y T3). One hundred and twenty juveniles of hybrids of cachama blanca with an average weight of 145 ± 3,0 g were fed in triplicate groups. The CPHRA presented high protein content and significant differences (p < 0,05) were evidenced for the ADCs of dry matter, crude protein, crude fat, crude energy, and ash absorption, calcium and phosphorus. The ADCs for nutrients and energy were above 80%. Accordingly, the hydrolyzed protein concentrate from poultry waste has great potential as a protein and energy alternative of high nutritional value in fish feeding.

Palavras-chave : Protein alternative; Piaractus brachypomus; nutritional characteristics; apparent digestibility; poultry by-products.

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