L-GLUTAMINA E L-GLUTAMATO EM DIETAS PARA TILÁPIAS DO NILO (Oreochromis niloticus)

Content Provider	Semantic Scholar
Author	Carolina, Lilián Silva, Rosa Furuya, Wilson Massamitu
Copyright Year	2008
Abstract	Two studies were carried out to evaluate the dietary L-glutamine and L-glutamate in diets for Nile tilapia. It was utilized basal diet with supplemented with Aminogut, source of L-glutamine and L-glutamate, in proportion of 0, 1, 2 and 3% of diet. In the first study, the juveniles Nile tilapia (27.76 ± 0.76 g) were distributed in cages of 0.12m in a randomized block design and four treatments with four replicates and fourteen fish per experimental unit. It was used a basal diet with 30% of crude protein and 2,980 kcal/kg of digestible energy and fish were fed to satiation during 47 days. In the second study, fingerlings Nile tilapias (0.60 ± 0.1 g) were distributed in tanks of 0.8m using a complete randomized experimental design with four treatments, three replicates and 90 fish per experimental unit. It was used a basal diet with 33% of crude protein and 2,940 kcal/kg of digestible energy and fish were fed to satiation during 85 days. The analyzed parameters in both experiments were: performance, carcass composition, villus height and blood ammonia and urea. In the first study, no effects were observed in fish fed with diets supplemented with L-glutamine and L-glutamate on performance, villus height and carcass composition. In the second study, feed intake, feed:gain ratio, protein efficiency ratio, nitrogen retention, hepatic somatic index, carcass composition and blood ammonia were not influence by L-glutamine and Lglutamate. It was observed a linear increase of L-glutamine and L-glutamate levels on weight gain. It was observed a quadratic effect of L-glutamine and L-glutamate levels on liver weight and villus height. It was concluded that the addition of L-glutamine and Lglutamate increase weight gain and villus height of Nile tilapia fingerlings. Key-words: amino acid, fish, intestinal mucous, performance
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