2026-04-142026-04-142026-02-24SANTOS, Marcos Rodrigues dos. Proteína hidrolisada de vísceras de frango em dietas para juvenis do peixe ornamental amazônico Pyrrhulina brevis (STEINDACHNER, 1876). Orientador: Leonnan Carlos Carvalho de Oliveira; Coorientadora: Bianca Gomes da Silveira. 2026. 27 f. Trabalho de Curso (Bacharelado em Engenharia de Pesca) – Faculdade de Engenharia de Pesca. Instituto de Estudos Costeiros, Campus Universitário de Bragança, Universidade Federal do Pará, Bragança-PA, 2026. Disponível em: https://bdm.ufpa.br/handle/prefix/9455. Acesso em: .https://bdm.ufpa.br/handle/prefix/9455The Amazon region is home to a wide diversity of ornamental fish, among which Pyrrhulina brevis stands out as a species of international interest due to its hardiness, coloration, and adaptability, but whose captive breeding is limited by the absence of specific nutritional protocols. The high cost and variation in the availability of fishmeal (FM), the main protein source used in aquaculture diets, reinforce the need for sustainable alternatives, such as hydrolyzed chicken viscera protein (HCVP), a poultry byproduct with high nutritional value, good digestibility, and wide availability. This study evaluated, over 45 days, the partial replacement of FM with HCVP in isoproteic (42% CP) and isolipidic (8% EE) diets for juvenile P. brevis, using 150 fish distributed in five treatments with increasing levels of replacement (0%, 2.5%, 5.0%, 7.5%, and 10%). Productive performance parameters of the animals were analyzed, with fish fed four times a day and water quality maintained under adequate conditions. Partial replacement of FP with PHVF did not compromise survival or uniformity, both of which were high in all treatments, confirming the viability of the ingredient. Weight gain and specific growth rate (SGR) showed a quadratic response as a function of the replacement levels, with an optimum point estimated at 3.55% for weight gain and 3.73% for SGR, indicating a positive effect on feed efficiency, while higher levels reduced growth, possibly due to saturation in peptide transport or excess free amino acids. It is concluded that PHVF can partially replace FP in diets for juvenile P. brevis, promoting improvements in weight gain and specific growth rate without compromising survival, in addition to contributing to the sustainability of Amazonian ornamental fish farming by reducing dependence on highcost ingredients and valorizing agro-industrial waste in a circular economy approach.Acesso AbertoIngredientes alternativosNutrição de peixesPiscicultura ornamentalAlternative ingredientsFish nutritionOrnamental fish farmingCNPQ::CIENCIAS AGRARIAS::RECURSOS PESQUEIROS E ENGENHARIA DE PESCA::ENGENHARIA DE PESCATrabalho de Curso - Graduação - MonografiaAttribution-NonCommercial-NoDerivs 3.0 Brazil