Robert M. Cerrato

Learn More
—Over 600 hard clams Mercenaria mercenaria from a wild population in Raritan Bay, New York, were examined histologically to assess the extent and intensity of quahog parasite X (QPX) disease in the fishery area. The overall rate of positive samples was 5.8%. A further 5.1% of clams had inflamed lesions suggestive of QPX infection but no QPX organisms were(More)
Population density and size distribution, salinity tolerance, and feeding activity were examined in a western Pacific grapsid crab, Hemigrapsus sanguineus, that was recently introduced to the mid-Atlantic coast of North America. Seasonal abundance on a boulder/cobble shore (Crane Neck Pt.) in central Long Island Sound, New York, USA, during 1997–1998,(More)
Experiments were conducted with natural plankton assemblages from two areas in Great South Bay (GSB) and the Peconic Bays Estuary System, NY, to compare the rates of growth and pelagic grazing mortality of Aureococcus anophagefferens with co-occurring phytoplankton. We hypothesized that A. anophagefferens would experience low mortality rates by microbial(More)
Three experiments were carried out in 300 l mesocosms using natural seawater from the Peconic Bays ecosystem, Long Island, New York, to examine the ability of the northern quahog Mercenaria mercenaria to prevent blooms of the brown tide alga Aureococcus anophagefferens. Nutrient enrichment and mixing of the mesocosms was conducted according to previous(More)
Bivalve and microzooplankton community grazing on natural plankton assemblages were studied in 2 embayments of the Peconic Bay estuary (West Neck Bay, Long Island, New York) to determine the relative importance of each community on plankton mortality. Each embayment was characterized by a fringing salt marsh. The bivalve populations consisted of a(More)
Direct measurements of shell growth of an unclassified mussel from active hydrothermal vents along the Galápagos Rift reveal growth rates of approxmately 1 centimeter per year for mature specimens. The largest mussel collected (with shell length of 18.4 centimeters) was estimated to be 19 +/- 7 years old at the time of sampling. Recorded growth rates are(More)
Over the last three decades, the abundance of the bivalve Mercenaria mercenaria, a benthic suspension feeder, has declined dramatically in the Great South Bay, Long Island, NY. This decline undoubtedly has had significant impacts on planktonic dynamics in the estuary and may be a contributing factor to the appearance of blooms of Aureococcus anophagefferens(More)
In marine ecosystems, benthic invertebrates contribute to many ecological functions, including the regulation of energy fluxes. This is the case for suspension-feeding organisms that often dominate the macrobenthos in coastal areas. Dense populations of benthic filter-feeders interact strongly with nearshore waters, removing phytoplankton, producing(More)
The concentrations of elements from Mn to Pb in the shells of Mercenaria mercenaria, Mya arenaria, and Argopecten irradians were measured using synchrotron x-ray fluorescence. This technique provides sensitivity as low as 1 ppm and resolution of 8 {mu}m. Elements were heterogeneously distributed, both on a large scale (several millimeters) and on a small(More)