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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ftdoajarticles:oai:doaj.org/article:d45cc607f42648eab976c331848e6a31 2023-05-15T15:32:46+02:00 Temporal variations in suspended particulate waste concentrations at open-water fish farms in Canada and Norway LM Brager PJ Cranford H Jansen Ø Strand 2016-08-01T00:00:00Z https://doi.org/10.3354/aei00190 https://doaj.org/article/d45cc607f42648eab976c331848e6a31 EN eng Inter-Research https://www.int-res.com/abstracts/aei/v8/p437-452/ https://doaj.org/toc/1869-215X https://doaj.org/toc/1869-7534 1869-215X 1869-7534 doi:10.3354/aei00190 https://doaj.org/article/d45cc607f42648eab976c331848e6a31 Aquaculture Environment Interactions, Vol 8, Pp 437-452 (2016) Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 article 2016 ftdoajarticles https://doi.org/10.3354/aei00190 2022-12-31T09:04:02Z 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. Article in Journal/Newspaper Atlantic salmon Salmo salar Directory of Open Access Journals: DOAJ Articles Canada Norway Aquaculture Environment Interactions 8 437 452 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
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 |
topic_facet |
Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 |
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 in Journal/Newspaper |
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://doi.org/10.3354/aei00190 https://doaj.org/article/d45cc607f42648eab976c331848e6a31 |
geographic |
Canada Norway |
geographic_facet |
Canada Norway |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Aquaculture Environment Interactions, Vol 8, Pp 437-452 (2016) |
op_relation |
https://www.int-res.com/abstracts/aei/v8/p437-452/ https://doaj.org/toc/1869-215X https://doaj.org/toc/1869-7534 1869-215X 1869-7534 doi:10.3354/aei00190 https://doaj.org/article/d45cc607f42648eab976c331848e6a31 |
op_doi |
https://doi.org/10.3354/aei00190 |
container_title |
Aquaculture Environment Interactions |
container_volume |
8 |
container_start_page |
437 |
op_container_end_page |
452 |
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1766363253406957568 |