FN Archimer Export Format PT J TI Dispersal modeling of fish early life stages: sensitivity with application to Atlantic cod in the western Gulf of Maine BT AF HURET, Martin RUNGE, J CHEN, Claude COWLES, G XU, Q PRINGLE, J AS 1:1,4;2:2;3:1;4:1;5:1;6:3; FF 1:PDG-DOP-DCN-EMH;2:;3:PDG-DOP-DCOP-SGCOP-STLCOP;4:;5:;6:; C1 Univ Massachusetts, Sch Marine Sci & Techol, New Bedford, MA 02744 USA. Univ Maine, Sch Marine Sci, Gulf Maine Res Inst, Portland, ME 04101 USA. Univ New Hampshire, Inst Study Earth Oceans & Space, Coastal Observing Ctr & Process Analysis Lab, Durham, NH 03824 USA. IFREMER, Dept Ecol Modeles Halieutique, F-44311 Nantes, France. C2 UNIV MASSACHUSETTS, USA UNIV MAINE US, USA UNIV NEW HAMPSHIRE, USA IFREMER, FRANCE SI NANTES TAHITI SE PDG-DOP-DCN-EMH PDG-DOP-DCOP-SGCOP-STLCOP IN WOS Ifremer jusqu'en 2018 copubli-int-hors-europe IF 2.546 TC 74 UR https://archimer.ifremer.fr/doc/2007/publication-3566.pdf LA English DT Article DE ;Meso scale processes and turbulence;Spawning grounds;Modeling sensitivity;Particle dispersal;Larval transport;Gadhus morhua;Atlantic cod;Gulf of Maine AB As an initial step in establishing mechanistic relationships between environmental variability and recruitment in Atlantic cod Gadhus morhua along the coast of the western Gulf of Maine, we assessed transport success of larvae from major spawning grounds to nursery areas with particle tracking using the unstructured grid model FVCOM (finite volume coastal ocean model). In coastal areas, dispersal of early planktonic life stages of fish and invertebrate species is highly dependent on the regional dynamics and its variability, which has to be captured by our models. With state-of-the-art forcing for the year 1995, we evaluate the sensitivity of particle dispersal to the timing and location of spawning, the spatial and temporal resolution of the model, and the vertical mixing scheme. A 3 d frequency for the release of particles is necessary to capture the effect of the circulation variability into an averaged dispersal pattern of the spawning season. The analysis of sensitivity to model setup showed that a higher resolution mesh, tidal forcing, and current variability do not change the general pattern of connectivity, but do tend to increase within-site retention. Our results indicate strong downstream connectivity among spawning grounds and higher chances for successful transport from spawning areas closer to the coast. The model run for January egg release indicates 1 to 19 % within-spawning ground retention of initial particles, which may be sufficient to sustain local populations. A systematic sensitivity analysis still needs to be conducted to determine the minimum mesh and forcing resolution that adequately resolves the complex dynamics of the western Gulf of Maine. Other sources of variability, i.e. large-scale upstream forcing and the biological environment, also need to be considered in future studies of the interannual variability in transport and survival of the early life stages of cod. PY 2007 PD OCT SO Marine Ecology Progress Series SN 0171-8630 PU Inter-Research VL 347 UT 000250978500023 BP 261 EP 274 DI 10.3354/meps06983 ID 3566 ER EF