Digestibility, protein retention rate and ammonia excretion in juvenile fat snook (Centropomus parallelus) fed with different protein levels
ABSTRACT: The aim of this study was to determine the level of dietary crude protein (CP) (480, 400, 440, 520 and 560g kg-1) in rations for juvenile II fat snook (Centropomus parallelus) that best promotes protein absorption and lower excretion of nitrogenous products. Three experiments were conducted: the first assessed the protein retention rate; the second evaluated ammonia excretion; and the third determined the best digestibility coefficient. The estimated protein retention rate showed a positive quadratic response to dietary CP with maximum retention at the 510.20g kg-1 protein level, and increasing levels of protein resulted in a greater total ammonia excretion rate in water. The mean apparent protein digestibility coefficient values increased with increasing levels of dietary protein up to 520g kg-1, where they stabilized. As determined by regression, the level of dietary CP that promotes the best digestibility was 495.62g kg-1.
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Universidade Federal de Santa Maria
2017
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oai:scielo:S0103-847820170007006522017-06-22Digestibility, protein retention rate and ammonia excretion in juvenile fat snook (Centropomus parallelus) fed with different protein levelsCarvalho,Maria Araci Grapiuna deFernandes,Luiz Fernando LoureiroGomes,Levy de Carvalho crude digestible protein fish culture nitrogen excretion diet ABSTRACT: The aim of this study was to determine the level of dietary crude protein (CP) (480, 400, 440, 520 and 560g kg-1) in rations for juvenile II fat snook (Centropomus parallelus) that best promotes protein absorption and lower excretion of nitrogenous products. Three experiments were conducted: the first assessed the protein retention rate; the second evaluated ammonia excretion; and the third determined the best digestibility coefficient. The estimated protein retention rate showed a positive quadratic response to dietary CP with maximum retention at the 510.20g kg-1 protein level, and increasing levels of protein resulted in a greater total ammonia excretion rate in water. The mean apparent protein digestibility coefficient values increased with increasing levels of dietary protein up to 520g kg-1, where they stabilized. As determined by regression, the level of dietary CP that promotes the best digestibility was 495.62g kg-1.info:eu-repo/semantics/openAccessUniversidade Federal de Santa MariaCiência Rural v.47 n.7 20172017-01-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000700652en10.1590/0103-8478cr20160369 |
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Carvalho,Maria Araci Grapiuna de Fernandes,Luiz Fernando Loureiro Gomes,Levy de Carvalho |
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Carvalho,Maria Araci Grapiuna de Fernandes,Luiz Fernando Loureiro Gomes,Levy de Carvalho Digestibility, protein retention rate and ammonia excretion in juvenile fat snook (Centropomus parallelus) fed with different protein levels |
| author_facet |
Carvalho,Maria Araci Grapiuna de Fernandes,Luiz Fernando Loureiro Gomes,Levy de Carvalho |
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Carvalho,Maria Araci Grapiuna de |
| title |
Digestibility, protein retention rate and ammonia excretion in juvenile fat snook (Centropomus parallelus) fed with different protein levels |
| title_short |
Digestibility, protein retention rate and ammonia excretion in juvenile fat snook (Centropomus parallelus) fed with different protein levels |
| title_full |
Digestibility, protein retention rate and ammonia excretion in juvenile fat snook (Centropomus parallelus) fed with different protein levels |
| title_fullStr |
Digestibility, protein retention rate and ammonia excretion in juvenile fat snook (Centropomus parallelus) fed with different protein levels |
| title_full_unstemmed |
Digestibility, protein retention rate and ammonia excretion in juvenile fat snook (Centropomus parallelus) fed with different protein levels |
| title_sort |
digestibility, protein retention rate and ammonia excretion in juvenile fat snook (centropomus parallelus) fed with different protein levels |
| description |
ABSTRACT: The aim of this study was to determine the level of dietary crude protein (CP) (480, 400, 440, 520 and 560g kg-1) in rations for juvenile II fat snook (Centropomus parallelus) that best promotes protein absorption and lower excretion of nitrogenous products. Three experiments were conducted: the first assessed the protein retention rate; the second evaluated ammonia excretion; and the third determined the best digestibility coefficient. The estimated protein retention rate showed a positive quadratic response to dietary CP with maximum retention at the 510.20g kg-1 protein level, and increasing levels of protein resulted in a greater total ammonia excretion rate in water. The mean apparent protein digestibility coefficient values increased with increasing levels of dietary protein up to 520g kg-1, where they stabilized. As determined by regression, the level of dietary CP that promotes the best digestibility was 495.62g kg-1. |
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Universidade Federal de Santa Maria |
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2017 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000700652 |
| work_keys_str_mv |
AT carvalhomariaaracigrapiunade digestibilityproteinretentionrateandammoniaexcretioninjuvenilefatsnookcentropomusparallelusfedwithdifferentproteinlevels AT fernandesluizfernandoloureiro digestibilityproteinretentionrateandammoniaexcretioninjuvenilefatsnookcentropomusparallelusfedwithdifferentproteinlevels AT gomeslevydecarvalho digestibilityproteinretentionrateandammoniaexcretioninjuvenilefatsnookcentropomusparallelusfedwithdifferentproteinlevels |
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1756406454806380544 |