Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Modelling nitrogen cycling in a mariculture ecosystem as a tool to evaluate its outflow
Autore:
Lefebvre, S; Bacher, C; Meuret, A; Hussenot, J;
Indirizzi:
IFREMER, CNRS, Ctr Rech Ecol Marine & Aquaculture, F-17137 Lhoumeau, France IFREMER Lhoumeau France F-17137 & Aquaculture, F-17137 Lhoumeau, France
Titolo Testata:
ESTUARINE COASTAL AND SHELF SCIENCE
fascicolo: 3, volume: 52, anno: 2001,
pagine: 305 - 325
SICI:
0272-7714(200103)52:3<305:MNCIAM>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
BASS DICENTRARCHUS-LABRAX; EUROPEAN SEA-BASS; SEABREAM SPARUS-AURATA; AQUACULTURE SYSTEMS; AMMONIA EXCRETION; BODY-COMPOSITION; PRODUCTION-RATES; MARINE DIATOMS; FISH PONDS; WATER;
Keywords:
models; nitrogen budget; ponds; fish culture; water quality; effluents; ammonia; Dicentrarchus labrax;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
59
Recensione:
Indirizzi per estratti:
Indirizzo: Lefebvre, S IFREMER, CNRS, Ctr Rech Ecol Marine & Aquaculture, BP 5, F-17137 Lhoumeau,France IFREMER BP 5 Lhoumeau France F-17137 F-17137 Lhoumeau,France
Citazione:
S. Lefebvre et al., "Modelling nitrogen cycling in a mariculture ecosystem as a tool to evaluate its outflow", EST COAST S, 52(3), 2001, pp. 305-325

Abstract

A model was constructed to describe an intensive mariculture ecosystem growing sea bass (Dicentrarchus labrax), located in the salt marshes of the Fiers d'Ars Bay on the French Atlantic coast, in order to assess nitrogen cycling within the system and nitrogen outflow from the system. The land-basedsystem was separated into three main compartments: a seawater reservoir, fish ponds and a lagoon (sedimentation pond). Three submodels were built forsimulation purposes: (1) a hydrological submodel which simulated water exchange; (2) a fish growth and excretion bioenergetic submodel; and (3) a nitrogen compound transformation and loss submodel (i.e. ammonification, nitrification and assimilation processes). A two-year sampling period of nitrogen water quality concentrations and fish growth was used to validate the model. The model fitted the observations of dissolved nitrogen components, fish growth and water fluxes on a daily basis in all the compartments. The dissolved inorganic nitrogen ranged widely and over time from 0.5 to 9 g N m(-3) within the system, depending on seawater supply and water temperature, without affecting fish growth. Fish feed was the most important input of nitrogen into the system. The mean average input of nitrogen in the feed was 205 kg N day(-1), of which 19% was retained by fish, 4% accumulated in the sediment and 61% flowed from the system as dissolved components. The farm represented about 25% of the total dissolved nitrogen export from the bay, although the farm surface area was 100 times smaller than that of the bay. (C) 2001 Academic Press.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 09:21:08