Modelling biogeochemical fluxes across a Mediterranean fish cage farm

An integrated approach is described for modelling interactions between off-shore fish cages and biogeochemical fluxes of carbon (C), nitrogen (N) and phosphorus (P). Two individual-based population dynamic models for European seabass Dicentrarchus labrax and gilthead seabream Sparus aurata were coup...

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Autores principales:	D Brigolin, VL Meccia, C Venier, P Tomassetti, S Porrello, R Pastres
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/48349f5ee9784eaeb9772c8aff00ebdd
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spelling	oai:doaj.org-article:48349f5ee9784eaeb9772c8aff00ebdd2021-11-17T10:08:23ZModelling biogeochemical fluxes across a Mediterranean fish cage farm1869-215X1869-753410.3354/aei00093https://doaj.org/article/48349f5ee9784eaeb9772c8aff00ebdd2014-04-01T00:00:00Zhttps://www.int-res.com/abstracts/aei/v5/n1/p71-88/https://doaj.org/toc/1869-215Xhttps://doaj.org/toc/1869-7534An integrated approach is described for modelling interactions between off-shore fish cages and biogeochemical fluxes of carbon (C), nitrogen (N) and phosphorus (P). Two individual-based population dynamic models for European seabass Dicentrarchus labrax and gilthead seabream Sparus aurata were coupled with a Lagrangian deposition and a benthic degradation model. The individual models explicitly take into account the effects of water temperature and feed availability on fish growth. The integrated model was tested at a Mediterranean fish farm where a comprehensive set of in situ environmental and husbandry data was available. Tests were performed to compare the predicted and observed total organic carbon (TOC) concentrations in surface sediment under and near fish cages. At a local scale, the model output simulated the spatial distribution of 4 biogeochemical indicators, namely: TOC concentrations, C fluxes towards the seabed and C:N and C:P ratios. These allowed the most impacted areas and more extended areas of intermediate organic enrichment to be identified. The model was also used for estimating the mass balance of C, N and P, in order to determine the potential cumulative effects of multiple fish farms in the same area. The C, N and P fluxes among feed, fish and environment were calculated for each fish species over 24 mo of farm activity. The results showed that the amount of dissolved N directly released into the water column in inorganic form (ammonia/urea) was comparable to that deposited on the seafloor in particulate form as uneaten feed and faeces. A larger fraction of P (about 65%) was released as faeces. Results from the integrated model yielded useful information for assessing the sustainability of an area for aquaculture activities that could be used to provide a scientific rationale for fish farm development in new areas.D BrigolinVL MecciaC VenierP TomassettiS PorrelloR PastresInter-ResearcharticleAquaculture. Fisheries. AnglingSH1-691EcologyQH540-549.5ENAquaculture Environment Interactions, Vol 5, Iss 1, Pp 71-88 (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 D Brigolin VL Meccia C Venier P Tomassetti S Porrello R Pastres Modelling biogeochemical fluxes across a Mediterranean fish cage farm
description	An integrated approach is described for modelling interactions between off-shore fish cages and biogeochemical fluxes of carbon (C), nitrogen (N) and phosphorus (P). Two individual-based population dynamic models for European seabass Dicentrarchus labrax and gilthead seabream Sparus aurata were coupled with a Lagrangian deposition and a benthic degradation model. The individual models explicitly take into account the effects of water temperature and feed availability on fish growth. The integrated model was tested at a Mediterranean fish farm where a comprehensive set of in situ environmental and husbandry data was available. Tests were performed to compare the predicted and observed total organic carbon (TOC) concentrations in surface sediment under and near fish cages. At a local scale, the model output simulated the spatial distribution of 4 biogeochemical indicators, namely: TOC concentrations, C fluxes towards the seabed and C:N and C:P ratios. These allowed the most impacted areas and more extended areas of intermediate organic enrichment to be identified. The model was also used for estimating the mass balance of C, N and P, in order to determine the potential cumulative effects of multiple fish farms in the same area. The C, N and P fluxes among feed, fish and environment were calculated for each fish species over 24 mo of farm activity. The results showed that the amount of dissolved N directly released into the water column in inorganic form (ammonia/urea) was comparable to that deposited on the seafloor in particulate form as uneaten feed and faeces. A larger fraction of P (about 65%) was released as faeces. Results from the integrated model yielded useful information for assessing the sustainability of an area for aquaculture activities that could be used to provide a scientific rationale for fish farm development in new areas.
format	article
author	D Brigolin VL Meccia C Venier P Tomassetti S Porrello R Pastres
author_facet	D Brigolin VL Meccia C Venier P Tomassetti S Porrello R Pastres
author_sort	D Brigolin
title	Modelling biogeochemical fluxes across a Mediterranean fish cage farm
title_short	Modelling biogeochemical fluxes across a Mediterranean fish cage farm
title_full	Modelling biogeochemical fluxes across a Mediterranean fish cage farm
title_fullStr	Modelling biogeochemical fluxes across a Mediterranean fish cage farm
title_full_unstemmed	Modelling biogeochemical fluxes across a Mediterranean fish cage farm
title_sort	modelling biogeochemical fluxes across a mediterranean fish cage farm
publisher	Inter-Research
publishDate	2014
url	https://doaj.org/article/48349f5ee9784eaeb9772c8aff00ebdd
work_keys_str_mv	AT dbrigolin modellingbiogeochemicalfluxesacrossamediterraneanfishcagefarm AT vlmeccia modellingbiogeochemicalfluxesacrossamediterraneanfishcagefarm AT cvenier modellingbiogeochemicalfluxesacrossamediterraneanfishcagefarm AT ptomassetti modellingbiogeochemicalfluxesacrossamediterraneanfishcagefarm AT sporrello modellingbiogeochemicalfluxesacrossamediterraneanfishcagefarm AT rpastres modellingbiogeochemicalfluxesacrossamediterraneanfishcagefarm
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Modelling biogeochemical fluxes across a Mediterranean fish cage farm

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