General Information

Event name: US-95-005
Nature of the harmful event:
High Phyto concentration
Event directly affected:
Toxicity detected: No
Associated syndrome:
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes
Event occurred before in this location: Yes (1989:<130,000 cells/ml in Moriches Bay, <23,000 cells/ml in Shinnecock Bay. 1990: <1,000 to 960,000 cells/ml. 1991: <1,000 to >1,000,000 cells/ml. 1992: >1,000,000 cells/ml. 1993: up to 200,000 cells/ml. 1994: up to 38,000 cells/ml.)
Individuals to contact: NUZZI, Robert

Location & Date

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Location: Latitude: , Longitude:
General location information: Moriches and Shinnecock Bays., New York.
HAB Area code(s): US-08
Additional location information: The bloom was present throughout both bays, with highest concentrations in eastern Moriches Bay, Quantuck Bay, and western Shinnecock Bay.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: January - August in Moriches Bay (sampling was not continued after 8/23), and from January-October in Shinnecock Bay (sampling was terminated on 10/5).


Causative organism known: Yes
Causative Species/Genus: Aureococcus anophagefferens (<100,000,0 cells/L)
late June to mid July.
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography:

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: No Oxygen content (nL/L): Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: Current Velocity: 0
Nutrient information:
Temperature Range During Event: Max: 28 °C, Min: 2 °C
Salinity Range During Event: Max: 31, Min: 25
Bloom location in the water column:
In situ
Growth Comments
Additional Environmental information: Dissolved oxygen: 4.8-11 mg/l.

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: No Type of kit used:
Additional information:
Economic losses:
Management decision: Continue weekly monitoring program.
Additional harmful effect information: Impacts on various shellfish species (scallops, hard clams and mussels) and on submerged aquatic vegetation (eelgrass) have previously been reported. Other effects are aesthetic - water discoloration and reduced transparency.