Características físicas de dietas extruidas para juveniles de Arapaima gigas con inclusión de aceite de vísceras de pollo y ensilado fermentado de pescado

• Autor: Rengifo Gasco, Carlos Jamir
• Formato: tesis de grado
• Fecha de Publicación: 2025
• Institución: Universidad Nacional De La Amazonía Peruana
• Repositorio: UNAPIquitos-Institucional
• Lenguaje: español
• OAI Identifier: oai:repositorio.unapiquitos.edu.pe:20.500.12737/12832
• Enlace del recurso: https://hdl.handle.net/20.500.12737/12832
• Nivel de acceso: acceso abierto
• Materia: Alimentación de peces; Propiedades físicas; Cocción extrusión; Aceites animales; Ensilado de pescado; Juvenil; Paiche; Arapaima gigas; https://purl.org/pe-repo/ocde/ford#4.01.08

This study, conducted at IVITA - Pucallpa of UNMSM, evaluated the physical characteristics of extruded diets, formulated with poultry viscera oil and fermented fish silage meal. Ten isoproteic (452.46 g CP/kg) and isoenergetic (4,255.42 kcal GE/kg) diets were designed, varying the levels of fish oil substitution and silage inclusion, and compared to a commercial diet (Nicovita Classic Trout; CP 42%, EE 13%, Cz 15%, H 12%, FB 3.0%). Relevant physical characteristics for diet quality were analyzed: floatability, sinking rate, absorption and solubility in water, leaching of proteins, lipids, and ashes, apparent density, expansion, and water resistance. Evaluations were conducted using standardized methodologies, including floatability measurements at 30 min, sinking rate in a water column, and nutrient losses after controlled immersion and drying. Results showed that diets R2, R6 - R10 exhibited lower sinking rates (0.90 - 1.26 cm/s) compared to the control diet. The highest protein leaching was recorded in the control diet, R1, and R2 (32.84%), while the highest lipid loss was observed in the control diet (56.61%). Regarding apparent density, the control diet had the highest value (789.07 g/L) and R10 the lowest (655.08 g/L). The substitution of poultry viscera oil and inclusion of fermented fish silage meal in extruded diets did not negatively affect the physical characteristics of the pellets.