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Title: | Apparent digestibility coefficient of practical diets with different energy:protein ratios for pirarucu juveniles |
Other Titles: | Digestibilidade aparente de dietas práticas com diferentes relações energia:proteína em juvenis de pirarucu |
Authors: | Ono, Eduardo Akifumi Nunes, Érica da Silva Santiago Cedano, Jimmy Carlos Campos Pereira Filho, Manoel Roubach, Rodrigo |
Keywords: | Arapaima Gigas Glycine Max |
Issue Date: | 2008 |
metadata.dc.publisher.journal: | Pesquisa Agropecuaria Brasileira |
metadata.dc.relation.ispartof: | Volume 43, Número 2, Pags. 249-254 |
Abstract: | The objective of this work was to determine the apparent digestibility of nutrients and energy of diets for pirarucu (Arapaima gigas) juveniles. Eight experimental diets containing four energy:protein ratios (11, 10.1, 9, 8 kcal digestible energy per gram of crude protein) and two non-protein energy sources (soybean oil and poultry fat) were tested in a 4x2 factorial scheme, in triplicates. Two hundred and forty pirarucu juveniles weighting 96.8±2.3 g were distributed in 24 cylindrical-conical fiberglass tanks, adapted for feces collection (modified Guelph system). Fish were fed twice a day to apparent satiation, with experimental diets containing 0.5% of chromium oxide as inert marker in order to determine the apparent digestibility coefficients. Diets containing an energy:protein ratio of 9 kcal digestible energy per gram of crude protein resulted in significantly lower apparent digestibility coefficient for dry matter, crude protein and non-nitrogenous extract. The highest apparent digestibility coefficients for crude fat was obtained with soybean oil. The dietary energy:protein ratio influences the nutrient and energy apparent digestibility coefficients to pirarucu juveniles. |
metadata.dc.identifier.doi: | 10.1590/S0100-204X2008000200014 |
Appears in Collections: | Artigos |
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