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| Format: | Artículo científico |
| Sprache: | en |
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Universidade Estadual de Maringá
2012
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| Online-Zugang: | https://www.redalyc.org/articulo.oa?id=303126511012 |
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- Mathematical modeling for digestible energy in animal feeds for tilapia Luiz Vítor Oliveira Vidal Wilson Massamitu Furuya Elias Nunes Martins Tadeu Orlandi Xavier Mariana Michelato Thêmis Sakaguti Graciano Agrociencias estimate Nutrition linear models nutritional value The objective of this study was to formulate a mathematical model to estimate digestible energy in animal feeds for tilapia. Literature results were used of the proximate composition of crude protein, ether extract, mineral matter and gross energy, as well as digestible energy obtained in biological assays. The data were subjected to stepwise backward multiple linear regression. Path analysis was performed to measure the direct and indirect effects of each independent variable on the dependent one. To validate the model, data from independent studies and values obtained from a digestibility trial with juvenile Nile tilapia testing five meat and bone meals (MBM) were used, using the Guelph feces collecting system and chromium oxide (III) as an indicator. The obtained model is described below and cannot estimate digestible energy (DE) of animal origin: DE (kcal kg−1) = −2364.970+1.287xGE;R2 = 0.775. The path coefficients were medium or low, the highest direct effect was from gross energy (0.529), while the highest indirect effect was from crude protein, through gross energy (0.439). 2012 artículo científico 1806-2636 https://www.redalyc.org/articulo.oa?id=303126511012 en http://www.redalyc.org/revista.oa?id=3031 Acta Scientiarum. Animal Sciences application/pdf Universidade Estadual de Maringá Acta Scientiarum. Animal Sciences (Brasil) Num.3 Vol.34