Exploring the contribution of dietary protein from poultry by-product meal and fish meal to the growth of catfish Ictalurus punctatus by means of nitrogen stable isotopes

ABSTRACT The natural nitrogen stable isotope signatures (δ15N) found in poultry by-product meal (PBM) and fish meal (FM) were used to estimate the relative contribution of dietary nitrogen supplied by both ingredients to the somatic growth of juvenile channel catfish Ictalurus punctatus. Si...

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Autores principales:	García-Pérez,Oscar Daniel, Cruz-Valdez,Julio César, Ramírez-Martínez,Carlos, Villarreal-Cavazos,David, Gamboa-Delgado,Julián
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2018
Materias:	channel catfish Ictalurus punctatus poultry by-product meal fish meal nitrogen stable isotopes nutrient allocation
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2018000100037
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spelling	oai:scielo:S0718-560X20180001000372018-04-17Exploring the contribution of dietary protein from poultry by-product meal and fish meal to the growth of catfish Ictalurus punctatus by means of nitrogen stable isotopesGarcía-Pérez,Oscar DanielCruz-Valdez,Julio CésarRamírez-Martínez,CarlosVillarreal-Cavazos,DavidGamboa-Delgado,Julián channel catfish Ictalurus punctatus poultry by-product meal fish meal nitrogen stable isotopes nutrient allocation ABSTRACT The natural nitrogen stable isotope signatures (δ15N) found in poultry by-product meal (PBM) and fish meal (FM) were used to estimate the relative contribution of dietary nitrogen supplied by both ingredients to the somatic growth of juvenile channel catfish Ictalurus punctatus. Six isonitrogenous and isoenergetic experimental diets were formulated using FM and PBM. Two of these diets consisted of isotopic controls having only one ingredient supplying dietary nitrogen, either FM or PBM. Four combined diets were formulated with varying proportions of these ingredients in order to supply high proportions of PBM (FM:PBM, 50:50, 35:65 20:80 and 5:95) on a nitrogen basis. There were significant differences in mean final weight of fish at the end of the trial. Lower growth was observed as the dietary level of PBM increased. In order to determine the relative contributions of the dietary nitrogen supplied by FM and PBM to catfish growth, an isotopic mixing model was applied. Results indicated that the incorporation of dietary nitrogen supplied by PBM was equivalent to the die tary proportions. The dietary nitrogen available in combined diets containing 50, 65 and 80% of PBM was incorporated in fish bodies as 50, 62 and 81%, respectively. However, high incorporation of dietary nitrogen from PBM was not always reflected in higher growth rates. Results demonstrate the viable use of stable isotopes to determine the allocation of dietary nitrogen and indicate that practical diets for catfish can be formulated with levels of PBM as high as 65% without affecting growth and survival.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.46 n.1 20182018-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2018000100037en10.3856/vol46-issue1-fulltext-5
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	channel catfish Ictalurus punctatus poultry by-product meal fish meal nitrogen stable isotopes nutrient allocation
spellingShingle	channel catfish Ictalurus punctatus poultry by-product meal fish meal nitrogen stable isotopes nutrient allocation García-Pérez,Oscar Daniel Cruz-Valdez,Julio César Ramírez-Martínez,Carlos Villarreal-Cavazos,David Gamboa-Delgado,Julián Exploring the contribution of dietary protein from poultry by-product meal and fish meal to the growth of catfish Ictalurus punctatus by means of nitrogen stable isotopes
description	ABSTRACT The natural nitrogen stable isotope signatures (δ15N) found in poultry by-product meal (PBM) and fish meal (FM) were used to estimate the relative contribution of dietary nitrogen supplied by both ingredients to the somatic growth of juvenile channel catfish Ictalurus punctatus. Six isonitrogenous and isoenergetic experimental diets were formulated using FM and PBM. Two of these diets consisted of isotopic controls having only one ingredient supplying dietary nitrogen, either FM or PBM. Four combined diets were formulated with varying proportions of these ingredients in order to supply high proportions of PBM (FM:PBM, 50:50, 35:65 20:80 and 5:95) on a nitrogen basis. There were significant differences in mean final weight of fish at the end of the trial. Lower growth was observed as the dietary level of PBM increased. In order to determine the relative contributions of the dietary nitrogen supplied by FM and PBM to catfish growth, an isotopic mixing model was applied. Results indicated that the incorporation of dietary nitrogen supplied by PBM was equivalent to the die tary proportions. The dietary nitrogen available in combined diets containing 50, 65 and 80% of PBM was incorporated in fish bodies as 50, 62 and 81%, respectively. However, high incorporation of dietary nitrogen from PBM was not always reflected in higher growth rates. Results demonstrate the viable use of stable isotopes to determine the allocation of dietary nitrogen and indicate that practical diets for catfish can be formulated with levels of PBM as high as 65% without affecting growth and survival.
author	García-Pérez,Oscar Daniel Cruz-Valdez,Julio César Ramírez-Martínez,Carlos Villarreal-Cavazos,David Gamboa-Delgado,Julián
author_facet	García-Pérez,Oscar Daniel Cruz-Valdez,Julio César Ramírez-Martínez,Carlos Villarreal-Cavazos,David Gamboa-Delgado,Julián
author_sort	García-Pérez,Oscar Daniel
title	Exploring the contribution of dietary protein from poultry by-product meal and fish meal to the growth of catfish Ictalurus punctatus by means of nitrogen stable isotopes
title_short	Exploring the contribution of dietary protein from poultry by-product meal and fish meal to the growth of catfish Ictalurus punctatus by means of nitrogen stable isotopes
title_full	Exploring the contribution of dietary protein from poultry by-product meal and fish meal to the growth of catfish Ictalurus punctatus by means of nitrogen stable isotopes
title_fullStr	Exploring the contribution of dietary protein from poultry by-product meal and fish meal to the growth of catfish Ictalurus punctatus by means of nitrogen stable isotopes
title_full_unstemmed	Exploring the contribution of dietary protein from poultry by-product meal and fish meal to the growth of catfish Ictalurus punctatus by means of nitrogen stable isotopes
title_sort	exploring the contribution of dietary protein from poultry by-product meal and fish meal to the growth of catfish ictalurus punctatus by means of nitrogen stable isotopes
publisher	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate	2018
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2018000100037
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Exploring the contribution of dietary protein from poultry by-product meal and fish meal to the growth of catfish Ictalurus punctatus by means of nitrogen stable isotopes

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