Effects of food processing and fibre content on the digestibility, energy intake and biochemical parameters of Blue-and-gold macaws (Ara ararauna L. - Aves, Psittacidae)
Nenhuma Miniatura disponível
Data
2014-04-01
Orientador
Coorientador
Pós-graduação
Curso de graduação
Título da Revista
ISSN da Revista
Título de Volume
Editor
Wiley-Blackwell
Tipo
Artigo
Direito de acesso
Acesso restrito
Resumo
Considering the increased incidence of obesity and metabolic diseases in caged psittacines, the effect of fibre and food processing was evaluated in the Blue-and-gold macaw. Four food formulations (0%, 7%, 14% and 21% of sugarcane fibre) processed by pelleting or extrusion were studied, resulting in eight diets. To study digestibility, 48 macaws housed in pairs in cages was used in a block design. Subsequently, diets containing 0% or 21% sugarcane fibre, pelleted or extrude was fed for 4months to evaluate energy intake and blood metabolites. A 2x2x2 (two fibre levels, two food processing methods and two genders) factorial arrangement with subplots (beginning and end) was used. When differences were detected in anova's F test, data were submitted to polynomial contrasts in the first experiment and to orthogonal contrasts in the second experiment (p<0.05). Fibre addition reduced protein, fat and energy (p<0.001) digestibility in both food processing. Pelleted foods presented higher dry matter digestibility and food metabolisable energy (ME) than the extruded ones (p<0.05). Fibre addition or the type of processing did not change ME ingestion (p>0.05). The macaws gained body weight (p<0.05) regardless of the diet (p>0.05), but females fed with the high-fibre diets did not gain weight (p>0.05), suggesting a low food ME (12.5kJ/g).The substitution of the original diet (sunflower seeds, fruits and cooked maize) by the experimental foods decreased the basal (12-h fast) concentrations of glucose, cholesterol and triglycerides (p<0.001). The consumption of pelleted diets reduced serum glucose and cholesterol (p<0.05). Results suggest that the pelleted diets were more beneficial and can be used to reduce blood metabolites related to metabolic disorders that are commonly observed in macaws.
Descrição
Palavras-chave
Idioma
Inglês
Como citar
Journal Of Animal Physiology And Animal Nutrition. Hoboken: Wiley-blackwell, v. 98, n. 2, p. 251-261, 2014.