Abstract
ABSTRACT Quantitative measurements of phytoplankton removal in a natural setting are needed to evaluate interactions between aquacultured bivalve populations and the surrounding environment. We report high-frequency (15-min) measurements of environmental variables relevant to oyster feeding and excretion at the inflow and outflow of an oyster nursery—floating upweller system (FLUPSY)—from June through September 2010 in the East Creek embayment, Peconic Estuary, NY. We demonstrated large variability in oyster particle clearance rate on short- (minutes to hours) to long-term (seasonal) timescales, including oyster responses to environmental variation, such as diurnal temperature and dissolved oxygen cycles, wind-driven turbulence, and the presence of harmful algae. A diel cycle in clearance rates calculated from whole FLUPSY measurements was apparent, with a maximum weight-specific clearance rate (CRW) of 2.21 L/h/g occurring around midnight, and a minimum CRW of 0.32 L/h/g at 0740 HR, coincident with the l...
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