Temporal variations in suspended particulate waste concentrations at open-water fish farms in Canada and Norway

The co-cultivation of finfish and bivalve filter feeders, with the purpose of recycling solid waste effluents and enhancing aquaculture revenues, has stimulated efforts to characterize particulate waste dynamics at open-water fish farms. Temporal variability in waste concentrations in the water colu...

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Autores principales:	LM Brager, PJ Cranford, H Jansen, Ø Strand
Formato:	article
Lenguaje:	EN
Publicado:	Inter-Research 2016
Materias:	Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/d45cc607f42648eab976c331848e6a31
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spelling	oai:doaj.org-article:d45cc607f42648eab976c331848e6a312021-11-11T11:05:28ZTemporal variations in suspended particulate waste concentrations at open-water fish farms in Canada and Norway1869-215X1869-753410.3354/aei00190https://doaj.org/article/d45cc607f42648eab976c331848e6a312016-08-01T00:00:00Zhttps://www.int-res.com/abstracts/aei/v8/p437-452/https://doaj.org/toc/1869-215Xhttps://doaj.org/toc/1869-7534The co-cultivation of finfish and bivalve filter feeders, with the purpose of recycling solid waste effluents and enhancing aquaculture revenues, has stimulated efforts to characterize particulate waste dynamics at open-water fish farms. Temporal variability in waste concentrations in the water column was studied at Atlantic salmon Salmo salar farms in eastern Canada and Norway, and at a sablefish Anoplopoma fimbria farm in western Canada. Turbidity and chlorophyll a (chl a) sensors were used to continuously monitor suspended particulate matter (SPM) and chl a concentrations at various depths and distances to the net-pens. Time-series analysis of these data indicated that SPM fluctuations at the study sites corresponded largely with tidal periodicity and variations in phytoplankton biomass (chl a). ANOVA comparisons of mean SPM levels in water flowing from the direction of net-pens (potential farm influence) and towards the farm (control) generally indicated insignificant effects of fish wastes on SPM levels at the farms (p > 0.05). A significant effect of the farm was detected by an ANOVA comparison of SPM concentrations collected at 5 m depth at farm and reference stations in an oligotrophic fjord, but the calculated level of waste enhancement over the sampling period was extremely small (0.02 mg l-1). Results indicate that temporal variations in SPM concentrations around the open-water fish farms were largely driven by natural processes and that the addition of fish wastes had a negligible effect. Consequently, there is little rationale for introducing commercial extractive species (e.g. bivalves) in open-water integrated multi-trophic aquaculture systems to mitigate the horizontal flux of particulate fish wastes.LM BragerPJ CranfordH JansenØ StrandInter-ResearcharticleAquaculture. Fisheries. AnglingSH1-691EcologyQH540-549.5ENAquaculture Environment Interactions, Vol 8, Pp 437-452 (2016)
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 LM Brager PJ Cranford H Jansen Ø Strand Temporal variations in suspended particulate waste concentrations at open-water fish farms in Canada and Norway
description	The co-cultivation of finfish and bivalve filter feeders, with the purpose of recycling solid waste effluents and enhancing aquaculture revenues, has stimulated efforts to characterize particulate waste dynamics at open-water fish farms. Temporal variability in waste concentrations in the water column was studied at Atlantic salmon Salmo salar farms in eastern Canada and Norway, and at a sablefish Anoplopoma fimbria farm in western Canada. Turbidity and chlorophyll a (chl a) sensors were used to continuously monitor suspended particulate matter (SPM) and chl a concentrations at various depths and distances to the net-pens. Time-series analysis of these data indicated that SPM fluctuations at the study sites corresponded largely with tidal periodicity and variations in phytoplankton biomass (chl a). ANOVA comparisons of mean SPM levels in water flowing from the direction of net-pens (potential farm influence) and towards the farm (control) generally indicated insignificant effects of fish wastes on SPM levels at the farms (p > 0.05). A significant effect of the farm was detected by an ANOVA comparison of SPM concentrations collected at 5 m depth at farm and reference stations in an oligotrophic fjord, but the calculated level of waste enhancement over the sampling period was extremely small (0.02 mg l-1). Results indicate that temporal variations in SPM concentrations around the open-water fish farms were largely driven by natural processes and that the addition of fish wastes had a negligible effect. Consequently, there is little rationale for introducing commercial extractive species (e.g. bivalves) in open-water integrated multi-trophic aquaculture systems to mitigate the horizontal flux of particulate fish wastes.
format	article
author	LM Brager PJ Cranford H Jansen Ø Strand
author_facet	LM Brager PJ Cranford H Jansen Ø Strand
author_sort	LM Brager
title	Temporal variations in suspended particulate waste concentrations at open-water fish farms in Canada and Norway
title_short	Temporal variations in suspended particulate waste concentrations at open-water fish farms in Canada and Norway
title_full	Temporal variations in suspended particulate waste concentrations at open-water fish farms in Canada and Norway
title_fullStr	Temporal variations in suspended particulate waste concentrations at open-water fish farms in Canada and Norway
title_full_unstemmed	Temporal variations in suspended particulate waste concentrations at open-water fish farms in Canada and Norway
title_sort	temporal variations in suspended particulate waste concentrations at open-water fish farms in canada and norway
publisher	Inter-Research
publishDate	2016
url	https://doaj.org/article/d45cc607f42648eab976c331848e6a31
work_keys_str_mv	AT lmbrager temporalvariationsinsuspendedparticulatewasteconcentrationsatopenwaterfishfarmsincanadaandnorway AT pjcranford temporalvariationsinsuspendedparticulatewasteconcentrationsatopenwaterfishfarmsincanadaandnorway AT hjansen temporalvariationsinsuspendedparticulatewasteconcentrationsatopenwaterfishfarmsincanadaandnorway AT østrand temporalvariationsinsuspendedparticulatewasteconcentrationsatopenwaterfishfarmsincanadaandnorway
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Temporal variations in suspended particulate waste concentrations at open-water fish farms in Canada and Norway

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