General Information

Event name: US-87-001
Nature of the harmful event:
Water Discoloration , Mass mortalities
Event directly affected:
Planktonic life , Shellfish
Toxicity detected: No
Associated syndrome:
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: No
Event occurred before in this location: No
Individuals to contact: COSPER, E.

Location & Date

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Location: Latitude: , Longitude:
General location information: Peconic Bay, Great South Bay., New York.
HAB Area code(s): US-08
Additional location information: Long Island, New York (possibly also in Barnegat Bay, New Jersey).
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: July 1987 - February 1988.


Causative organism known: Yes
Causative Species/Genus: Aureococcus anophagefferens (1,000,000, cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: 25 - 30 g/L Chl. 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: 26 °C, Min: °C
Salinity Range During Event: Max: 30, Min: 22
Bloom location in the water column:
In situ
Growth Comments
Additional Environmental information: Oxygen conditions: normal. Water column/stability: well-mixed, shallow.

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: Re-seeding of juvenile scallops attempted; unsuccessful due to mortality.
Additional harmful effect information: Water coloration - brown.