Combined models of growth, waste production, dispersal and deposition from cage-cultured Atlantic salmon to predict benthic enrichment
Models of particulate waste production and deposition can be used in performance-based management approaches as cost-effective tools to assess environmental effects of open-pen finfish aquaculture. XLDEPMOD is an MS Excel® spreadsheet-based depositional model for predicting particulate organic carbo...
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ftdoajarticles:oai:doaj.org/article:9ed14ec3e0f84d06a065ee3dc4221966 2023-05-15T15:31:53+02:00 Combined models of growth, waste production, dispersal and deposition from cage-cultured Atlantic salmon to predict benthic enrichment BT Hargrave R Filgueira J Grant BA Law 2022-12-01T00:00:00Z https://doi.org/10.3354/aei00445 https://doaj.org/article/9ed14ec3e0f84d06a065ee3dc4221966 EN eng Inter-Research https://www.int-res.com/abstracts/aei/v14/p309-328/ https://doaj.org/toc/1869-215X https://doaj.org/toc/1869-7534 1869-215X 1869-7534 doi:10.3354/aei00445 https://doaj.org/article/9ed14ec3e0f84d06a065ee3dc4221966 Aquaculture Environment Interactions, Vol 14, Pp 309-328 (2022) Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 article 2022 ftdoajarticles https://doi.org/10.3354/aei00445 2023-02-12T01:31:31Z Models of particulate waste production and deposition can be used in performance-based management approaches as cost-effective tools to assess environmental effects of open-pen finfish aquaculture. XLDEPMOD is an MS Excel® spreadsheet-based depositional model for predicting particulate organic carbon (POC) waste production and sedimentation from net-pen cultured finfish. Calculations are based on temperature-dependent fish growth and mass-balance calculations of feed input, growth, respiration and 3 size classes of feces. Depth-average and near-bottom directional currents are used to determine waste dispersion by fitted Gaussian distribution functions. Near-bottom velocity and substrate-based resuspension thresholds and loss of deposited waste due to decomposition and consumption by wild fish and invertebrates are used to calculate net POC sedimentation. The model was applied to 2 Atlantic salmon farms in southwestern Bay of Fundy, Canada. Sensitivity analysis showed that reduction in waste flux due to resuspension depends on the magnitude of current and wave-driven bottom shear and mass fractions of feces with different settling velocities. Depending on depth, current speed, substrate type and fecal mass fractions, resuspension can remove up to 80% of deposited waste from under net-pens. Steep gradients with high rates (>5 g POC m-2 d-1) of sedimentation predicted under and close to cages and lower rates (<1 g POC m-2 d-1) >50 m away are consistent with published DEPOMOD results and sediment trap observations at the farm sites. The model can be used by regulators to determine if acceptable environmental standards for benthic impacts due to waste deposition from salmon aquaculture are being maintained. Article in Journal/Newspaper Atlantic salmon Directory of Open Access Journals: DOAJ Articles Canada Aquaculture Environment Interactions 14 309 328 |
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 BT Hargrave R Filgueira J Grant BA Law Combined models of growth, waste production, dispersal and deposition from cage-cultured Atlantic salmon to predict benthic enrichment |
topic_facet |
Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 |
description |
Models of particulate waste production and deposition can be used in performance-based management approaches as cost-effective tools to assess environmental effects of open-pen finfish aquaculture. XLDEPMOD is an MS Excel® spreadsheet-based depositional model for predicting particulate organic carbon (POC) waste production and sedimentation from net-pen cultured finfish. Calculations are based on temperature-dependent fish growth and mass-balance calculations of feed input, growth, respiration and 3 size classes of feces. Depth-average and near-bottom directional currents are used to determine waste dispersion by fitted Gaussian distribution functions. Near-bottom velocity and substrate-based resuspension thresholds and loss of deposited waste due to decomposition and consumption by wild fish and invertebrates are used to calculate net POC sedimentation. The model was applied to 2 Atlantic salmon farms in southwestern Bay of Fundy, Canada. Sensitivity analysis showed that reduction in waste flux due to resuspension depends on the magnitude of current and wave-driven bottom shear and mass fractions of feces with different settling velocities. Depending on depth, current speed, substrate type and fecal mass fractions, resuspension can remove up to 80% of deposited waste from under net-pens. Steep gradients with high rates (>5 g POC m-2 d-1) of sedimentation predicted under and close to cages and lower rates (<1 g POC m-2 d-1) >50 m away are consistent with published DEPOMOD results and sediment trap observations at the farm sites. The model can be used by regulators to determine if acceptable environmental standards for benthic impacts due to waste deposition from salmon aquaculture are being maintained. |
format |
Article in Journal/Newspaper |
author |
BT Hargrave R Filgueira J Grant BA Law |
author_facet |
BT Hargrave R Filgueira J Grant BA Law |
author_sort |
BT Hargrave |
title |
Combined models of growth, waste production, dispersal and deposition from cage-cultured Atlantic salmon to predict benthic enrichment |
title_short |
Combined models of growth, waste production, dispersal and deposition from cage-cultured Atlantic salmon to predict benthic enrichment |
title_full |
Combined models of growth, waste production, dispersal and deposition from cage-cultured Atlantic salmon to predict benthic enrichment |
title_fullStr |
Combined models of growth, waste production, dispersal and deposition from cage-cultured Atlantic salmon to predict benthic enrichment |
title_full_unstemmed |
Combined models of growth, waste production, dispersal and deposition from cage-cultured Atlantic salmon to predict benthic enrichment |
title_sort |
combined models of growth, waste production, dispersal and deposition from cage-cultured atlantic salmon to predict benthic enrichment |
publisher |
Inter-Research |
publishDate |
2022 |
url |
https://doi.org/10.3354/aei00445 https://doaj.org/article/9ed14ec3e0f84d06a065ee3dc4221966 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
Aquaculture Environment Interactions, Vol 14, Pp 309-328 (2022) |
op_relation |
https://www.int-res.com/abstracts/aei/v14/p309-328/ https://doaj.org/toc/1869-215X https://doaj.org/toc/1869-7534 1869-215X 1869-7534 doi:10.3354/aei00445 https://doaj.org/article/9ed14ec3e0f84d06a065ee3dc4221966 |
op_doi |
https://doi.org/10.3354/aei00445 |
container_title |
Aquaculture Environment Interactions |
container_volume |
14 |
container_start_page |
309 |
op_container_end_page |
328 |
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1766362380205293568 |