FN Archimer Export Format PT J TI Scenarios of fish waste deposition at the sub-lagoon scale: a modelling approach for aquaculture zoning and site selection BT AF CHARY, Killian CALLIER, Myriam COVES, Denis Aubin, Joel SIMON, Julien FIANDRINO, Annie AS 1:1;2:1;3:1;4:2;5:3;6:4; FF 1:PDG-RBE-MARBEC-LAAAS;2:PDG-RBE-MARBEC-LAAAS;3:PDG-RBE-MARBEC-LAAAS;4:;5:PDG-RBE-STH-LTBH;6:PDG-ODE-LITTORAL-LERLR; C1 MARBEC, Univ Montpellier, IRD, CNRS, Palavas-les-Flots, Ifremer 34250, France UMR 1069 INRA AGROCAMPUS-OUEST SAS, Rennes 35042, France Ifremer, Laboratoire de Technologie et de Biologie Halieutiques, RBE/STH/LTBH, Lorient 56100, France MARBEC, Univ Montpellier, IRD, CNRS, Sete, Ifremer 34200, France C2 IFREMER, FRANCE INRAE, FRANCE IFREMER, FRANCE IFREMER, FRANCE SI SETE PALAVAS LORIENT SE PDG-RBE-MARBEC-LAAAS PDG-RBE-STH-LTBH PDG-ODE-LITTORAL-LERLR UM MARBEC IN WOS Ifremer UPR WOS Ifremer UMR copubli-france copubli-p187 IF 3.906 TC 2 UR https://archimer.ifremer.fr/doc/00666/77810/79985.pdf https://archimer.ifremer.fr/doc/00666/77810/79986.docx LA English DT Article DE ;aquaculture zones;carrying-capacity;environmental impact;hydrodynamics;NewDEPOMOD;particle dispersion;red drum;scenario analysis AB Spatial planning, including zoning and site-selection steps, is necessary to determine locations that minimize environmental impacts of aquaculture and respect ecosystem carrying capacities. This study aimed to analyse potential benthic waste deposition in a broad range of fish farming situations to facilitate zoning. To this end, we simulated waste dispersion for 54 aquaculture scenarios combining three red drum (Sciaenops ocellatus) farm types (Small, Medium, and Large) based on real farm characteristics and 36 sites with contrasting hydrodynamics in Mayotte’s North-East Lagoon. Key forcing variables and parameters of the particle-dispersion model for farms (layout and solid waste fluxes), species (feed- and faeces-settling velocities) and sites (depth and barotropic currents) were obtained. From the outputs of the 54 simulations, relationships between hydrodynamic regimes and deposition rates, area of influence and distance of influence of the farm were analysed. Critical limits of current intensity that reduced deposition rate below selected deposition thresholds were identified. For instance, to prevent deposition rates greater than 12 kg solids m−2 year−1, the mean current intensity should exceed 10.2 and 6.8 cm s−1 for Medium and Large farms, respectively. The study confirmed that production level is not the main factor that influences deposition rates; instead, management of the entire farm (cage position, distance between cages) must be considered to predict impacts more accurately and guide site selection. PY 2021 PD JUN SO Ices Journal Of Marine Science SN 1054-3139 PU Oxford University Press (OUP) VL 78 IS 3 UT 000731911900013 BP 922 EP 939 DI 10.1093/icesjms/fsaa238 ID 77810 ER EF