General Information

Event name: US-92-011
Nature of the harmful event:
Water Discoloration
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 (1985, 1986: >1,000,000 cells/ml 1988: 10(3) - 500,000 cells/ml (June-August) 1989: 25,000 cells/ml (April - September) 1990: 10,000 cells/ml (May - December) 1991: 10,000 cells/ml (January-June).)
Individuals to contact: NUZZI, Robert

Location & Date

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Location: Latitude: , Longitude:
General location information: Great South Bay., New York.
HAB Area code(s): US-08
Additional location information: The bloom was present throughout the bay with highest concentrations occurring in the central bay area between Bayshore and Patchogue.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: January through December, with peak concentrations during July and August.


Causative organism known: Yes
Causative Species/Genus: Aureococcus anophagefferens (>1,000,000 cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography:

Environmental Conditions

Weather: Turbidity (NTU): <0.5 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: 26 °C, Min: 0 °C
Salinity Range During Event: Max: 30, Min: 20
Bloom location in the water column:
In situ
Growth Comments Probably in situ growth.
Additional Environmental information: Dissolved Oxygen: 5.4 - 10.7 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: Increase frequency of monitoring activities.
Additional harmful effect information: