Simulating the temporal pattern of waste production in farmed gilthead seabream (Sparus aurata), European seabass (Dicentrarchus labrax) and Atlantic bluefin tuna (Thunnus thynnus)

Piedecausa, M.A.; Aguado‐Giménez, Felipe; Cerezo-Valverde, Jesús; Hernández-Llorente, M.D.; García‐García, Benjamín

doi:10.1016/j.ecolmodel.2009.11.011

Cited by 28 publications

(38 citation statements)

References 23 publications

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“…Complementing this work, Nordvarg & Håkanson (2002) developed a mass balance model for phosphorus in this archipelago to be used for siting farms in nutrient sensitive areas. Model simulations comparing phosphorus outputs from sea bream, sea bass and Atlantic bluefin tuna (Piedecausa et al 2010) indicated significant differences in nutrient waste production among species -with the tuna being the highest -which must be taken into account when managing the marine environment for multiple aquaculture facilities. In summary, increased dissolved phosphorus is generally not considered a serious concern for marine cage aquaculture (Nash et al 2005, Costa-Pierce et al 2007) because primary production in most marine waters is nitrogen, not phosphorus, limited.…”

Section: Studies Reporting Significant Phosphorus Increasementioning

confidence: 99%

Marine cage culture and the environment: effects on water quality and primary production

Price¹,

Black²,

Hargrave³

et al. 2015

Aquacult. Environ. Interact.

141

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Section: Studies Reporting Significant Phosphorus Increasementioning

confidence: 99%

Marine cage culture and the environment: effects on water quality and primary production

Price¹,

Black²,

Hargrave³

et al. 2015

Aquacult. Environ. Interact.

141

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“…Models have been proposed to assess the interactions of aquaculture with macronutrient cycles (e.g. Lefebvre et al 2001, Islam 2005, Strain & Hargrave 2005, Piedecausa et al 2010, Wild-Allen et al 2010, Keeley et al 2013). Islam (2005) identified 2 linear regression models predicting N and P emission from fish cages on the basis of the food conversion ratio (FCR-weight of feed provided to weight of fish harvested).…”

Section: Indicators Of Interaction At the Larger Spatial Scale: Nutrimentioning

confidence: 99%

Modelling biogeochemical fluxes across a Mediterranean fish cage farm

Brigolin¹,

Meccia²,

Venier³

et al. 2014

Aquacult. Environ. Interact.

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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.

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“…The gross metabolic waste is calculated using a nutritional approximation based on the following equation: C = G + E + F, where C is the % in dry matter of N or P in the ingested food, G is the quantity of nutrients retained for growth, E are losses through excretion and F are losses through the feces [10,17,18,29,[53][54][55]. To calculate the waste output, we applied the model for gilthead seabream proposed by [10], the average apparent digestibility coefficient of three commercial extruded feeds for seabream from [56]) and an FCR of 2 obtained from confidential surveys of fish farming companies (Table 2).…”

Section: Feedmentioning

confidence: 99%

Life Cycle Assessment of Gilthead Seabream (Sparus aurata) Production in Offshore Fish Farms

Garcı́a¹,

Jiménez

Aguado‐Giménez

et al. 2016

Sustainability

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Abstract:Life cycle assessment is used in this study to evaluate the potential environmental impacts of producing gilthead seabream in an offshore sea farm exposed to storms in the Spanish Mediterranean Sea. The farming methods used can be considered as "basic" since no centralized or automatic food distribution system exists and there is no control system. This study aims to identify the main hotspots under these conditions and to propose and compare viable alternatives to them. Contribution analysis found that the component of the system with the greatest potential environmental impact (48% of the overall impact) was fish feed, especially the raw material used. Other contributory factors were the fuel consumed by the vessels operating in the farm (35%), the dumping of N and P in the environment due to the metabolism of the fish (12%), the cages and their anchorage system (5%). A sensitivity analysis showed that a significant reduction in potential environmental impact can be achieved by increasing feeding efficiency. Feed formulation in raw materials is also an important factor and could serve to diminish overall adverse effects. A balance needs to be found between productive performance (growth, survival and feed conversion rate), feed price and its influence on production costs and the overall environmental consequences.

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Simulating the temporal pattern of waste production in farmed gilthead seabream (Sparus aurata), European seabass (Dicentrarchus labrax) and Atlantic bluefin tuna (Thunnus thynnus)

Cited by 28 publications

References 23 publications

Marine cage culture and the environment: effects on water quality and primary production

Marine cage culture and the environment: effects on water quality and primary production

Modelling biogeochemical fluxes across a Mediterranean fish cage farm

Life Cycle Assessment of Gilthead Seabream (Sparus aurata) Production in Offshore Fish Farms

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