Mathematical modeling for digestible protein in animal feeds for tilapia
| Title: | Mathematical modeling for digestible protein in animal feeds for tilapia |
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| Authors: | Luiz Vítor Oliveira Vidal, Wilson Massamitu Furuya, Elias Nunes Martins, Tadeu Orlandi Xavier, Mariana Michelato, Themis Sakaguti Graciano |
| Source: | Revista Brasileira de Zootecnia, Vol 41, Iss 6, Pp 1346-1352 (2012) |
| Publisher Information: | Sociedade Brasileira de Zootecnia, 2012. |
| Publication Year: | 2012 |
| Collection: | LCC:Animal culture |
| Subject Terms: | chemical composition, estimate, feed, linear models, Animal culture, SF1-1100 |
| More Details: | The objective of this study was to formulate mathematical models to estimate digestible protein in some animal feeds for tilapia. Literature results of the proximate composition of crude protein, ether extract, and mineral matter, as well as digestible protein obtained in biological assays, were used. The data were subjected to multiple linear stepwise backward regression. Path analysis was performed to measure the direct and indirect effects of each independent variable on the dependent one. To validate the model, the experience used data from independent studies and values obtained from a digestibility trial with juvenile Nile tilapia testing five meat and bone meals, using the Guelph feces collecting system and chromium oxide (III) as an indicator. The obtained model used to estimate digestible protein values (DP) of animal origin is: DP(g kg-1) = -204.15+1.203xCP;R² = 0.953. The path coefficients showed a high direct positive effect (0.900) of crude protein on the digestible protein content. The mineral matter content has an indirect negative effect on protein digestibility (-0.710), reducing the crude protein content and quality. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English Spanish; Castilian Portuguese |
| ISSN: | 1516-3598 1806-9290 |
| Relation: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000600005; https://doaj.org/toc/1516-3598; https://doaj.org/toc/1806-9290 |
| DOI: | 10.1590/S1516-35982012000600005 |
| Access URL: | https://doaj.org/article/66dbfd7f2dd841f9a7c14717c17ee157 |
| Accession Number: | edsdoj.66dbfd7f2dd841f9a7c14717c17ee157 |
| Database: | Directory of Open Access Journals |
| ISSN: | 15163598 18069290 |
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| DOI: | 10.1590/S1516-35982012000600005 |
| Published in: | Revista Brasileira de Zootecnia |
| Language: | English Spanish; Castilian Portuguese |