Effect of high dietary concentrations of brewer's dried yeast on growth performance and liver uricase in rainbow trout (Oncorhynchus mykiss)

Rumsey, G.L.; Kinsella, John E.; Shetty, Kalidas; Hughes, Steven G.

doi:10.1016/0377-8401(91)90058-z

Cited by 109 publications

(96 citation statements)

References 13 publications

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“…The changes in sensorial quality may be significant and trigger loss of productivity. A reason for that is the high level of nucleic acids present in the constitution of S. cerevisiae (Rumsey et al, 1991a).…”

Section: Resultsmentioning

confidence: 99%

“…In this case, a great amount of nucleic acids might result in toxic Table 3 -Zootechnical performance parameters for juveniles of pacu effects, as well as metabolic disturbance triggered by the uric acid and urea production, produced from nitrogen bases (purines) (Rumsey et al, 1992;Moraes et al, 1995). Some species are able to degrade these compounds as a consequence of uricase activities, identified in the liver of carnivore fish (Rumsey et al, 1991a) and also due to their ability to synthesize non-essencial amino acids on account of the nucleotide availability (Rumsey et al, 1992). Thus, it is supposed that pacu specie also has this ability, as it was not observed increase in the amount of urea or uric acid with the addition of yeast and by-products in the ration.…”

Section: Resultsmentioning

confidence: 99%

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Levels of yeast and its by-products on pacu juveniles feeding

2010

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-This study was conducted to evaluate the inclusion of two levels (2.5 e 5.0%) of dried yeast (Saccharomyces cerevisiae) and its by-products, disrupted yeast cells and yeast cell wall in diets for juveniles of pacu (Piaractus mesopotamicus).Production performance, body and plasmatic composition indexes were evaluated. Seven isoproteic (26% digestible protein) and isoenergetic (3.100 kcal digestible energy) diets were formulated containing increased levels of each ingredient. The diets were supplied for 86 days, "ad libitum". Yeast and by-products increase feed efficiency and protein use, when compared to the control diet. Carcass composition and plasmatic (glucose, cortisol, uric acid, urea and plasmatic protein) levels are not affected by the test ingredient supplementation.Key Words: Piaractus mesopotamicus, pre-biotic, production performance, Saccharomyces cerevisiae, yeast by-products Níveis de levedura e derivados na dieta de juvenis de pacuRESUMO -Este estudo foi realizado com o objetivo de avaliar os efeitos da suplementação de dois níveis (2,5 e 5,0%) de levedura íntegra desidratada (Saccharomyces cerevisiae) e seus derivados, autolisado e parede celular, em dietas para juvenis de pacu (11,98 g e 8,5 cm). Foram avaliados o desempenho produtivo, a composição corporal e os parâmetros plasmáticos de juvenis de pacu. Utilizaram-se sete dietas isoproteicas (26% de proteína digestível por kg de ração) e isoenergéticas (3.100 kcal de energia digestível por kg de ração), cada uma com um nível de cada ingrediente-teste e mais uma dieta controle (sem adição de levedura). A suplementação da levedura e de derivados realizada durante 86 dias melhorou a eficiência alimentar e a utilização proteica pelos juvenis de pacu em comparação à dieta sem adição desses ingredientes.A composição de carcaça e os níveis plasmáticos (ureia, ácido úrico, proteína, cortisol e glicose) não são afetados pela suplementação dos ingredientes-teste.Palavras-chave: derivados de levedura, desempenho produtivo, Piaractus mesopotamicus, prebiótico, Saccharomyces cerevisiae Revista Brasileira de Zootecnia

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Levels of yeast and its by-products on pacu juveniles feeding

2010

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“…Brewer's yeast may serve as an excellent health promoter for fish culture as even when administered for relatively long periods is able to enhance immune responses as well as growth of various fish species, without causing immunosuppression [94,95]. Furthermore, the relative high levels of nucleic acid nitrogen present (mostly in the form of RNA) that in humans and most monogastric animals can became toxic if taken in excess, as the capacity of excretion of the uric acid formed is limited [96], in fish does not happen due to their very active liver uricase [97].…”

Section: Yeast Treats For Animalsmentioning

confidence: 99%

Yeast: World’s Finest Chef

Faria-Oliveira¹,

Puga²,

Ferreira³

2013

Food Industry

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“…A levedura possui elevado teor de ácidos nucleicos na parede celular e sua utilização na dieta de animais monogástricos deve ser feita com cautela, pois o excesso de ácido nucleico na dieta é tóxico (SCHULZ & OSLAGE, 1976). No entanto, os efeitos tóxicos da levedura não foram relatados em peixes, provavelmente, em razão da alta atividade da uricase no fígado desses animais (RUMSEY et al, 1991;PERES & OLIVA-TELES, 2003).…”

Section: ---------------------------------Tratamentos----------------unclassified

“…Valores de até 50% de inclusão de levedura em dietas para trutas (Oncorhynchus mykiss) foram recomendados por RUMSEY et al (1991). Para tilápia do Nilo, FURUYA et al (2000) recomendaram o nível de 14% de adição, e MEDRI et al (2000) testaram diferentes níveis de até 30% de inclusão e não encontraram nenhum efeito prejudicial no desempenho zootécnico.…”

Section: Introductionunclassified