Dietary total phosphorus supplementation in goldfish diets

ABSTRACT. Although goldfish (Carassius auratus) is an important species for the ornamental fish industry, few data are available regarding the nutrient requirement of this species, with emphasis to mineral nutrition. Thus, we designed a 45-day feeding trial to evaluate the effect of dietary total ph...

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Autores principales:	Braga,Weslley F, Araújo,Janaína G, Martins,Graciela P, Oliveira,Silvio L, Guimarães,Igo G
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2016
Materias:	Carassius auratus phosphorus requirement minerals nutrition ornamental fish aquaculture
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2016000100013
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spelling	oai:scielo:S0718-560X20160001000132016-05-27Dietary total phosphorus supplementation in goldfish dietsBraga,Weslley FAraújo,Janaína GMartins,Graciela POliveira,Silvio LGuimarães,Igo G Carassius auratus phosphorus requirement minerals nutrition ornamental fish aquaculture ABSTRACT. Although goldfish (Carassius auratus) is an important species for the ornamental fish industry, few data are available regarding the nutrient requirement of this species, with emphasis to mineral nutrition. Thus, we designed a 45-day feeding trial to evaluate the effect of dietary total phosphorus (P) levels on growth performance and carcass mineral composition of goldfish fingerlings. 210 goldfish with 1.18 ± 0.04 g were randomly stocked into 30 3L-aquaria in a completely randomized design. Test diets were formulated to contain the following dietary total P levels: 3.5, 6.5, 9.5, 12.5 and 15.5 g kg-1. Dietary P affected all growth parameters and carcass macrominerals deposition, however, the micromineral carcass composition was not affected. No P deficiency signs were observed throughout the experiment. The linear broken-line model best fitted to daily weight gain, feed conversion ratio, specific growth rate, protein efficiency ratio, P retention, and whole-body P concentration at 8.2, 11.4, 8.2, 11.4, 15.5 and 7.1 g kg-1 dietary P, respectively. An exponential model best fitted to phosphorus utilization data with an estimated requirement of 8.6 g kg-1. In sum, the use of total P levels between 7.13 and 11.4 g kg-1 in goldfish diets seems to meet the requirement for maximum growth, feed utilization and proper whole-body mineralization.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.44 n.1 20162016-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2016000100013en10.3856/vol44-issue1-fulltext-13
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Carassius auratus phosphorus requirement minerals nutrition ornamental fish aquaculture
spellingShingle	Carassius auratus phosphorus requirement minerals nutrition ornamental fish aquaculture Braga,Weslley F Araújo,Janaína G Martins,Graciela P Oliveira,Silvio L Guimarães,Igo G Dietary total phosphorus supplementation in goldfish diets
description	ABSTRACT. Although goldfish (Carassius auratus) is an important species for the ornamental fish industry, few data are available regarding the nutrient requirement of this species, with emphasis to mineral nutrition. Thus, we designed a 45-day feeding trial to evaluate the effect of dietary total phosphorus (P) levels on growth performance and carcass mineral composition of goldfish fingerlings. 210 goldfish with 1.18 ± 0.04 g were randomly stocked into 30 3L-aquaria in a completely randomized design. Test diets were formulated to contain the following dietary total P levels: 3.5, 6.5, 9.5, 12.5 and 15.5 g kg-1. Dietary P affected all growth parameters and carcass macrominerals deposition, however, the micromineral carcass composition was not affected. No P deficiency signs were observed throughout the experiment. The linear broken-line model best fitted to daily weight gain, feed conversion ratio, specific growth rate, protein efficiency ratio, P retention, and whole-body P concentration at 8.2, 11.4, 8.2, 11.4, 15.5 and 7.1 g kg-1 dietary P, respectively. An exponential model best fitted to phosphorus utilization data with an estimated requirement of 8.6 g kg-1. In sum, the use of total P levels between 7.13 and 11.4 g kg-1 in goldfish diets seems to meet the requirement for maximum growth, feed utilization and proper whole-body mineralization.
author	Braga,Weslley F Araújo,Janaína G Martins,Graciela P Oliveira,Silvio L Guimarães,Igo G
author_facet	Braga,Weslley F Araújo,Janaína G Martins,Graciela P Oliveira,Silvio L Guimarães,Igo G
author_sort	Braga,Weslley F
title	Dietary total phosphorus supplementation in goldfish diets
title_short	Dietary total phosphorus supplementation in goldfish diets
title_full	Dietary total phosphorus supplementation in goldfish diets
title_fullStr	Dietary total phosphorus supplementation in goldfish diets
title_full_unstemmed	Dietary total phosphorus supplementation in goldfish diets
title_sort	dietary total phosphorus supplementation in goldfish diets
publisher	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate	2016
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2016000100013
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Dietary total phosphorus supplementation in goldfish diets

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