Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/42621
Title: Growth and energy metabolism of Nile tilapia juveniles fed glycerol
Other Titles: Crescimento e metabolismo energético de juvenis de tilápia-do-nilo alimentados com glicerol
Keywords: Oreochromis niloticus
Alternative feed
Carbohydrate
Nutrition
Alimentos alternativos
Carboidratos
Nutrição
Issue Date: May-2015
Publisher: Empresa Brasileira de Pesquisa Agropecuária (Embrapa), Secretaria de Pesquisa e Desenvolvimento (SPD)
Citation: COSTA, D. V. da et al. Growth and energy metabolism of Nile tilapia juveniles fed glycerol. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 50, n. 5, p. 347-354, May 2015. DOI: 10.1590/S0100-204X2015000500001.
Abstract: The objective of this work was to evaluate the effect of inclusion of dietary glycerol in replacement to starch on the growth and energy metabolism of Nile tilapia juveniles. The experiment was carried out in a completely randomized design with four treatments (0, 5, 10, and 15% purified glycerol) and six replicates. Pelleted, isonitrogenous, and isocaloric diets were provided for 60 days. Growth performance parameters and muscle glucose and protein concentrations were not affected by dietary glycerol levels. The treatment with 15% glycerol presented higher levels of muscle and liver triglycerides. A quadratic effect of treatments on muscle and liver triglyceride concentrations was observed. The treatment with 0% glycerol presented higher hepatic glucose levels than the one with 15%. Treatments did not differ for concentrations of liver protein, as well as of plasma glucose, triglycerides, and protein. Treatments with 10 and 15% glycerol showed higher activity of the glucose-6-phosphate-dehydrogenase enzyme than the treatment with 5%; however, there were no significant differences in the hepatic activities of the malic and glycerol kinase enzymes. A linear positive effect of treatments was observed on the activity of the glycerol kinase enzyme in liver. Levels of glycerol inclusion above 10% in the diet of Nile tilapia juveniles characterize it as a lipogenic nutrient.
URI: http://repositorio.ufla.br/jspui/handle/1/42621
Appears in Collections:DZO - Artigos publicados em periódicos

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