Lewis, C. V. Dartmouth College, cvl@dartmouth.edu
Lynch, D. V. Dartmouth College, daniel.r.lynch@dartmouth.edu
Fogarty, M. J. Chesapeake Biological Laboratory, fogarty@cbl.umces.edu
Mountain, D. National Marine Fisheries Service, David.Mountain@noaa.gov

 
EFFECT OF AREA CLOSURES ON GEORGES BANK BIVALVES: LARVAL TRANSPORT AND POPULATION DYNAMICS
 
We couple circulation models with simple population and behavioral models to estimate transport and recruitment of Sea Scallop larvae on Georges Bank. These simulations identify source and sink regions for the closed areas and provide simple predictions of their long-term effects on bank-wide population dynamics. Larvae are transported using the 6 bimonthly climatological flowfields developed for Dartmouth's GLOBEC Georges Bank modelling work. Particles are released in a flowfield consisting of the average horizontal velocity over the top 25 meters of the water column, advect and disperse over a range of larval durations, and settle to the substrate. Linear population models are then used to predict the effects of the closures under various levels of fishing pressure and background mortality. The model results allow visualization of the interaction between life history parameters and regions of the bank, estimation of the efficacy of these closures, and an indication of where area closures would effect the greatest improvement on population dynamics. (http://www-nml.dartmouth.edu/~lewis/closed_areas)
 
Day: Wednesday, Feb. 3
Time: 02:45 - 03:00pm
Location: Sweeney Center
 
Code: SS09WE0245S