Digestible protein requirements for maintenance, growth, and efficiency of protein utilization in pacu (Piaractus mesopotamicus) juveniles: an exponential nitrogen utilization model

ABSTRACT The present study aimed to estimate digestible protein (DP) requirements for maintenance and growth and assess the efficiency of protein utilization in pacu (Piaractus mesopotamicus) juveniles. A complete randomized design consisted of seven treatments, and five replicates (tanks) per treat...

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Autores principales:	Mansano,Cleber F.M., Silva,Edney P., Khan,Kifayat U., Macente,Beatrice I., Nascimento,Thiago M.T., Sakomura,Nilva K., Fernandes,João B.K., Takahashi,Leonardo S.
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2021
Materias:	Piaractus mesopotamicus feed intake monomolecular model maintenance requirement nitrogen deposition pacu nutrition
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2021000400608
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spelling	oai:scielo:S0718-560X20210004006082021-09-27Digestible protein requirements for maintenance, growth, and efficiency of protein utilization in pacu (Piaractus mesopotamicus) juveniles: an exponential nitrogen utilization modelMansano,Cleber F.M.Silva,Edney P.Khan,Kifayat U.Macente,Beatrice I.Nascimento,Thiago M.T.Sakomura,Nilva K.Fernandes,João B.K.Takahashi,Leonardo S. Piaractus mesopotamicus feed intake monomolecular model maintenance requirement nitrogen deposition pacu nutrition ABSTRACT The present study aimed to estimate digestible protein (DP) requirements for maintenance and growth and assess the efficiency of protein utilization in pacu (Piaractus mesopotamicus) juveniles. A complete randomized design consisted of seven treatments, and five replicates (tanks) per treatment was used. After a one-week acclimation period, 350 pacu juveniles of 27.48 ± 1.8 g (initial average body weight - BW) were equally distributed among 35 tanks (10 fish per tank) of 450 L. Fish were fed with seven graded digestible protein levels (64.5, 111.8, 164.6, 217.1, 264.4, 316.2 and 369.5 g kg−1) three times a day until apparent satiation for 120 days. The monomolecular model parameters including nitrogen maintenance requirement (NMR) (37.76 mg BW0.67 kg−1 d−1), daily nitrogen deposition (ND) (194.8 mg BW0.67 kg−1 d−1), and protein intakes (based on metabolic BW) of 1638, 1902, and 2241 mg kg−1BW0.67 d−1 for 75, 80 and 85% maximum theoretical nitrogen retention (NRmaxT), respectively and the efficiency of protein utilization (529×10−6) were estimated through the relationship between nitrogen intake (NI) and ND. The digestible protein requirements for 75, 80, and 85% of NRmaxT were estimated as 187, 217, and 256 g kg−1 respectively by the monomolecular model based on the daily feed intake of 2% of live BW of pacu juveniles.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.49 n.4 20212021-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2021000400608en10.3856/vol49-issue4-fulltext-2678
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Piaractus mesopotamicus feed intake monomolecular model maintenance requirement nitrogen deposition pacu nutrition
spellingShingle	Piaractus mesopotamicus feed intake monomolecular model maintenance requirement nitrogen deposition pacu nutrition Mansano,Cleber F.M. Silva,Edney P. Khan,Kifayat U. Macente,Beatrice I. Nascimento,Thiago M.T. Sakomura,Nilva K. Fernandes,João B.K. Takahashi,Leonardo S. Digestible protein requirements for maintenance, growth, and efficiency of protein utilization in pacu (Piaractus mesopotamicus) juveniles: an exponential nitrogen utilization model
description	ABSTRACT The present study aimed to estimate digestible protein (DP) requirements for maintenance and growth and assess the efficiency of protein utilization in pacu (Piaractus mesopotamicus) juveniles. A complete randomized design consisted of seven treatments, and five replicates (tanks) per treatment was used. After a one-week acclimation period, 350 pacu juveniles of 27.48 ± 1.8 g (initial average body weight - BW) were equally distributed among 35 tanks (10 fish per tank) of 450 L. Fish were fed with seven graded digestible protein levels (64.5, 111.8, 164.6, 217.1, 264.4, 316.2 and 369.5 g kg−1) three times a day until apparent satiation for 120 days. The monomolecular model parameters including nitrogen maintenance requirement (NMR) (37.76 mg BW0.67 kg−1 d−1), daily nitrogen deposition (ND) (194.8 mg BW0.67 kg−1 d−1), and protein intakes (based on metabolic BW) of 1638, 1902, and 2241 mg kg−1BW0.67 d−1 for 75, 80 and 85% maximum theoretical nitrogen retention (NRmaxT), respectively and the efficiency of protein utilization (529×10−6) were estimated through the relationship between nitrogen intake (NI) and ND. The digestible protein requirements for 75, 80, and 85% of NRmaxT were estimated as 187, 217, and 256 g kg−1 respectively by the monomolecular model based on the daily feed intake of 2% of live BW of pacu juveniles.
author	Mansano,Cleber F.M. Silva,Edney P. Khan,Kifayat U. Macente,Beatrice I. Nascimento,Thiago M.T. Sakomura,Nilva K. Fernandes,João B.K. Takahashi,Leonardo S.
author_facet	Mansano,Cleber F.M. Silva,Edney P. Khan,Kifayat U. Macente,Beatrice I. Nascimento,Thiago M.T. Sakomura,Nilva K. Fernandes,João B.K. Takahashi,Leonardo S.
author_sort	Mansano,Cleber F.M.
title	Digestible protein requirements for maintenance, growth, and efficiency of protein utilization in pacu (Piaractus mesopotamicus) juveniles: an exponential nitrogen utilization model
title_short	Digestible protein requirements for maintenance, growth, and efficiency of protein utilization in pacu (Piaractus mesopotamicus) juveniles: an exponential nitrogen utilization model
title_full	Digestible protein requirements for maintenance, growth, and efficiency of protein utilization in pacu (Piaractus mesopotamicus) juveniles: an exponential nitrogen utilization model
title_fullStr	Digestible protein requirements for maintenance, growth, and efficiency of protein utilization in pacu (Piaractus mesopotamicus) juveniles: an exponential nitrogen utilization model
title_full_unstemmed	Digestible protein requirements for maintenance, growth, and efficiency of protein utilization in pacu (Piaractus mesopotamicus) juveniles: an exponential nitrogen utilization model
title_sort	digestible protein requirements for maintenance, growth, and efficiency of protein utilization in pacu (piaractus mesopotamicus) juveniles: an exponential nitrogen utilization model
publisher	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate	2021
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2021000400608
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Digestible protein requirements for maintenance, growth, and efficiency of protein utilization in pacu (Piaractus mesopotamicus) juveniles: an exponential nitrogen utilization model

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