Digestibilidade e energia metabolizável da glicerina em cães

Lima, Daniele Cristina de; Netto, M. V. Teixeira; Félix, Ananda Portella; Bortolo, Marcelino; Oliveira, Simone Gisele de; Maiorka, Alex

doi:10.1590/0103-8478cr20120122

Cited by 3 publications

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References 5 publications

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“…Glycerol has been studied as a dietary energy source in several nonruminant animal cultures, such as poultry (Lima et al, 2012), swine (Shields et al, 2012), rabbit (Retore et al, 2012), and dogs (Lima et al, 2014). However, little is known about its inclusion in Nile tilapia (Oreochromis niloticus) diet.…”

Section: Introductionmentioning

confidence: 99%

Growth and energy metabolism of Nile tilapia juveniles fed glycerol

Paulino

Okamura

Oliveira

et al. 2015

Pesq. agropec. bras.

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-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.Index terms: Oreochromis niloticus, alternative feed, carbohydrate, nutrition. Crescimento e metabolismo energético de juvenis de tilápia-do-nilo alimentados com glicerolResumo -O objetivo deste trabalho foi avaliar o efeito da inclusão de glicerol na dieta, em substituição ao amido, sobre o desempenho e o metabolismo energético de juvenis de tilápia-do-nilo. O experimento foi conduzido em delineamento inteiramente casualizado com quatro tratamentos (0, 5, 10 e 15% de glicerol purificado) e seis repetições. Dietas peletizadas, isonitrogenadas e isoenergéticas foram fornecidas por 60 dias. Os parâmetros de desempenho produtivo e as concentrações de glicose e proteína muscular não foram afetados pelos níveis de glicerol na dieta. O tratamento com 15% de glicerol apresentou maiores níveis de triglicerídeos musculares e hepáticos. Observou-se efeito quadrático dos tratamentos nas concentrações de triglicerídeos no músculo e no fígado. O tratamento com 0% de glicerol apresentou maiores níveis de glicose hepática do que o tratamento com 15%. Os tratamentos não diferiram quanto às concentrações de proteína no fígado, bem como de glicose, triglicerídeos e proteína no plasma. Os tratamentos com 10 e 15% de glicerol apresentaram maiores atividades da enzima glicose-6-fosfato-desidrogenase do que o tratamento com 5%; no entanto, não houve diferenças significativas nas atividades hepáticas das enzimas málica e glicerol quinase. Observou-se efeito linear positivo dos tratamentos na atividade da enzima glicerol quinase no fígado. Níveis de inclusão de glicerol acima de 10% na dieta de juvenis de tilápia-do-nilo o caracterizam como nutriente lipogênico....

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Section: Introductionmentioning

confidence: 99%

Growth and energy metabolism of Nile tilapia juveniles fed glycerol

Paulino

Okamura

Oliveira

et al. 2015

Pesq. agropec. bras.

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Digestibility and palatability of adding crude glycerin to the diet of ponies

et al. 2020

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Palatability, digestibility, and metabolizable energy of dietary glycerol in adult cats1

Machado

Pezzali

Marx

et al. 2017

Journal of Animal Science

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Glycerol is a humectant, which reduces water activity when added to the diet. This property seems to offer dietary benefits, specifically in high-moisture diets for cats, where some humectants cannot be used. According to the U.S. Food and Drug Administration, glycerol is generally recognized as sustenance safe (GRAS). It is suggested that cats are able to metabolize glycerol and use it as an energy source without compromising health. Three experiments were conducted to evaluate the following characteristics of glycerol in the diet for cats: 1) a preference test, 2) digestibility, ME, and fecal and urinary characteristics, and 3) postprandial plasma glycemia. Twelve healthy adult female cats were randomly distributed among 4 treatments consisting of a basal diet (4,090 kcal ME/kg DM, 32% CP, 11% fat, 2.3% crude fiber, and 7.0% ash) and 3 diets with varying percentages of glycerol, made by replacing the basal diet with 2.5, 5.0, and 10.0% purified glycerol (99.5%). The inclusion of glycerol proportionally reduced ( < 0.05) water activity in the diets. The preference test was conducted by observing the contrast between the basal diet and the 5.0% and 10% glycerol diets. Cats did not show a preference for any diet in particular ( > 0.05). The digestibility assays showed that increasing dietary glycerol levels did not affect food intake or the apparent total tract digestibility of macronutrients and energy ( > 0.05). The inclusion of glycerol in the diets did not alter the stool moisture, fecal score, or urine volume. However, glycerol was detected in urine when it was incorporated into the diet at 10%. Glycemia increased up to 900 min following the first meal after the fasting period with no difference between treatments, even when the means were adjusted for food intake. The blood glucose area under the curve also showed no significant difference between treatments ( > 0.05). Cats accepted glycerol under the conditions of the study, and its nutritional value was determined as it has been done for other species. The ME of glycerol for adult cats was estimated to be 3,185 kcal/kg DM. Supplementing the diets of the cats with 10% glycerol may exceed their capacity to metabolize glycerol, possibly leading to urinary excretions.

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Digestibilidade e energia metabolizável da glicerina em cães

Cited by 3 publications

References 5 publications

Growth and energy metabolism of Nile tilapia juveniles fed glycerol

Growth and energy metabolism of Nile tilapia juveniles fed glycerol

Digestibility and palatability of adding crude glycerin to the diet of ponies

Palatability, digestibility, and metabolizable energy of dietary glycerol in adult cats1

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