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Amancio,Alda Lúcia de Lima; Silva Neto,Manuel Rosa da; Jordão Filho,José; Fonseca,Sthelio Braga da; Silva,José Humberto Vilar da. |
ABSTRACT The freshwater fish, tambaqui, Colossoma macropomum, is a native species of Brazilian fauna that has the potential to become a widespread aquaculture species, howerer, studies regarding the nutrient requirements remain scarce, often producing conflicting results. Hence, the currently available information is insufficient to formulate the specific diet of this species, for the different growth stages. This study aimed to evaluate the effects of dietary crude protein levels on the growth performance, body composition and ammonia excretion rates in tambaqui of 2-20 g body weight. Juvenile (average weight, 1.70 ? 0.05 g) were fed four times a day over a 60 days period using diets containing 300; 350; 400 and 450 g kg-1 crude protein in a completely... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crude protein; Growth performance; Body composition; Total ammonia nitrogen excretion; Protein utilization efficiency. |
Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000200259 |
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Amancio,Alda Lúcia de Lima; Silva,José Humberto Vilar da; Fernandes,João Batista Kochenborger; Sakomura,Nilva Kazue; Cruz,George Rodrigo Beltrão da. |
The objective of this study was to evaluate the accuracy of five mathematical models (Gompertz, Logistic, Linear Hyperbolic, Quadratic and Quadratic Logarithmic) to describe the growth curve of GIFT strain Nile tilapia, Oreochromis niloticus, and to characterize the growth trajectory of body parts. To do this, 1,000 fingerlings, with an initial weight of 2.4 g were placed into 20 brick tanks of 2 m³ each, at a density of 25 fish m-3, for 180 days. The animals were fed daily, using the protein levels and number of meals appropriate to each stage. Every two weeks 20 fish were randomly sampled, submitted to a fasting period of 48 h and then slaughtered by thermal shock, in order to determine the weight of the whole fish, the skin without scales, skinless... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oreochromis niloticus; Growth curve; Gompertz; Growth rate. |
Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000200005 |
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