Reducing geosmin off-flavor compounds and waste outputs through dietary phosphorus management in rainbow trout aquaculture

The aquaculture industry has long recognized the need to reduce phosphorus (P) waste outputs associated with environmental impact, and reduce off-flavor producing compounds, which can impact the quality of the fish product. This study was undertaken to investigate the effects of dietary high P (HP)...

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Autores principales:	P Sarker, A Pilote, M Auffret, É Proulx, R Villemur, MH Deschamps, G Vandenberg
Formato:	article
Lenguaje:	EN
Publicado:	Inter-Research 2014
Materias:	Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/c68271ebdf94435f8bcab40a25b7815e
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spelling	oai:doaj.org-article:c68271ebdf94435f8bcab40a25b7815e2021-11-16T10:30:26ZReducing geosmin off-flavor compounds and waste outputs through dietary phosphorus management in rainbow trout aquaculture1869-215X1869-753410.3354/aei00119https://doaj.org/article/c68271ebdf94435f8bcab40a25b7815e2014-12-01T00:00:00Zhttps://www.int-res.com/abstracts/aei/v6/n1/p105-117/https://doaj.org/toc/1869-215Xhttps://doaj.org/toc/1869-7534The aquaculture industry has long recognized the need to reduce phosphorus (P) waste outputs associated with environmental impact, and reduce off-flavor producing compounds, which can impact the quality of the fish product. This study was undertaken to investigate the effects of dietary high P (HP) and low P (LP) on growth, nutrient digestibility, P retention, and P loading as well as their correlation to the synthesis of geosmin-associated off-flavor in a recirculating aquaculture system of rainbow trout Oncorhynchus mykiss. The above diets were fed to quadruplicate tanks of rainbow trout (average mass ± SD: 127.4 ± 3.1 g) for 84 d. Results showed that the effects of the HP and LP diets on growth and P retention were not significantly different. While the apparent digestibility of P and other nutrients were higher in fish fed the LP diet, P waste outputs and geosmin levels in the fillets of fish were higher in fish fed the HP diet. Magnesium (Mg2+), potassium (K+) and zinc (Zn2+) concentrations in tank water were significantly lower in fish fed the HP diet than the LP diet in most of the sampling events. Furthermore, the tank water geosmin concentration was not strongly proportionally correlated with tank water-soluble P concentration for both the LP and HP diets. There was a strong proportional linear relationship between the geosmin concentration in tank water and in trout fillet for both the LP and HP diets. Results suggest that off-flavor contents in fish fillets and water were related to the dietary P level and metabolic P waste outputs into the system, findings that have implications for the formulation of sustainable diets for rainbow trout.P SarkerA PiloteM AuffretÉ ProulxR VillemurMH DeschampsG VandenbergInter-ResearcharticleAquaculture. Fisheries. AnglingSH1-691EcologyQH540-549.5ENAquaculture Environment Interactions, Vol 6, Iss 1, Pp 105-117 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5
spellingShingle	Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 P Sarker A Pilote M Auffret É Proulx R Villemur MH Deschamps G Vandenberg Reducing geosmin off-flavor compounds and waste outputs through dietary phosphorus management in rainbow trout aquaculture
description	The aquaculture industry has long recognized the need to reduce phosphorus (P) waste outputs associated with environmental impact, and reduce off-flavor producing compounds, which can impact the quality of the fish product. This study was undertaken to investigate the effects of dietary high P (HP) and low P (LP) on growth, nutrient digestibility, P retention, and P loading as well as their correlation to the synthesis of geosmin-associated off-flavor in a recirculating aquaculture system of rainbow trout Oncorhynchus mykiss. The above diets were fed to quadruplicate tanks of rainbow trout (average mass ± SD: 127.4 ± 3.1 g) for 84 d. Results showed that the effects of the HP and LP diets on growth and P retention were not significantly different. While the apparent digestibility of P and other nutrients were higher in fish fed the LP diet, P waste outputs and geosmin levels in the fillets of fish were higher in fish fed the HP diet. Magnesium (Mg2+), potassium (K+) and zinc (Zn2+) concentrations in tank water were significantly lower in fish fed the HP diet than the LP diet in most of the sampling events. Furthermore, the tank water geosmin concentration was not strongly proportionally correlated with tank water-soluble P concentration for both the LP and HP diets. There was a strong proportional linear relationship between the geosmin concentration in tank water and in trout fillet for both the LP and HP diets. Results suggest that off-flavor contents in fish fillets and water were related to the dietary P level and metabolic P waste outputs into the system, findings that have implications for the formulation of sustainable diets for rainbow trout.
format	article
author	P Sarker A Pilote M Auffret É Proulx R Villemur MH Deschamps G Vandenberg
author_facet	P Sarker A Pilote M Auffret É Proulx R Villemur MH Deschamps G Vandenberg
author_sort	P Sarker
title	Reducing geosmin off-flavor compounds and waste outputs through dietary phosphorus management in rainbow trout aquaculture
title_short	Reducing geosmin off-flavor compounds and waste outputs through dietary phosphorus management in rainbow trout aquaculture
title_full	Reducing geosmin off-flavor compounds and waste outputs through dietary phosphorus management in rainbow trout aquaculture
title_fullStr	Reducing geosmin off-flavor compounds and waste outputs through dietary phosphorus management in rainbow trout aquaculture
title_full_unstemmed	Reducing geosmin off-flavor compounds and waste outputs through dietary phosphorus management in rainbow trout aquaculture
title_sort	reducing geosmin off-flavor compounds and waste outputs through dietary phosphorus management in rainbow trout aquaculture
publisher	Inter-Research
publishDate	2014
url	https://doaj.org/article/c68271ebdf94435f8bcab40a25b7815e
work_keys_str_mv	AT psarker reducinggeosminoffflavorcompoundsandwasteoutputsthroughdietaryphosphorusmanagementinrainbowtroutaquaculture AT apilote reducinggeosminoffflavorcompoundsandwasteoutputsthroughdietaryphosphorusmanagementinrainbowtroutaquaculture AT mauffret reducinggeosminoffflavorcompoundsandwasteoutputsthroughdietaryphosphorusmanagementinrainbowtroutaquaculture AT eproulx reducinggeosminoffflavorcompoundsandwasteoutputsthroughdietaryphosphorusmanagementinrainbowtroutaquaculture AT rvillemur reducinggeosminoffflavorcompoundsandwasteoutputsthroughdietaryphosphorusmanagementinrainbowtroutaquaculture AT mhdeschamps reducinggeosminoffflavorcompoundsandwasteoutputsthroughdietaryphosphorusmanagementinrainbowtroutaquaculture AT gvandenberg reducinggeosminoffflavorcompoundsandwasteoutputsthroughdietaryphosphorusmanagementinrainbowtroutaquaculture
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Reducing geosmin off-flavor compounds and waste outputs through dietary phosphorus management in rainbow trout aquaculture

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