General Information

Event name: US-92-001
Nature of the harmful event:
Water Discoloration , Mass mortalities , Other ( Respiratory irritation.)
Event directly affected:
Toxicity detected: No
Associated syndrome: NSP , Aerosolized toxins effects
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes
Event occurred before in this location: Yes (Jan-Feb, Juyl-Nov 1991; Feb-March, Oct-Nov 1990; March-May 1989; Oct-Dec 1988; Jan/Feb, May-July, Sep/Oct 1987; Sept-Dec 1986; Sept-Dec 1985; Jan-March, May-Aug 1984; Jan/Feb, Oct-Dec 1983; Jan-April, July-Oct 1982; Sept/Oct 1981; Jan/Feb, June-Nov 1980; and before.)
Individuals to contact: STEIDINGER, Karen A.

Location & Date

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Location: Latitude: , Longitude:
General location information: Pinellas to Lee County, Florida
HAB Area code(s): US-16
Additional location information: Ocurred in coastal and nearshore water.
Bloom event dates (yyyy/mm/dd): Start: 1992-09-01, End: 1993-01-17
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Gymnodinium breve ( cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: Coastal surface water samples ranged from negative to 2,100,000 cells/L; offshore (up to 20 miles out) surface water samples ranged from negative to 10,330,000 cells/L.
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: 36 °C, Min: 16 °C
Salinity Range During Event: Max: 26,
Bloom location in the water column:
Growth: Advected
Growth Comments Advected population from offshore waters.
Additional Environmental information: Wide salinity (>22) ranges and nearshore surface water temperatures from 16 C to 35 C; offshore water salinity was >26 and temperatures ranged from 29 C to 29.2 C.

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: Type of kit used:
Additional information:
Economic losses:
Management decision: Shellfish bans: 9-4, 1-17, Longboat Key (Sarasota County; 9-8, 1-17, Lower Tampa Bay (Manatee County); 9-9, 1-17, Lemon Bay (Sarasota county), Lemon Bay and Gasparilla Sound (Charlotte County), Pine Island Sound and Matlacha (Lee County); 9-15, 1-17,
Additional harmful effect information:
Updated at 04:51 on 10 May 2018