General Information

Event name: US-90-011
Nature of the harmful event:
Seafood toxins
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 (March-May 1989, Oct-Dec 1988, Jan/Feb, May-July, Sept/Oct 1987, Sept-Dec 1986, Sept-Dec 1985, Jan-March, May-Aug 1984, Jan/Feb, Oct, Dec 1983, Jan-Apr, July-Oct 1982, Sept/Oct 1981, Jan/Feb, June-Nov 1980, and before)
Individuals to contact: STEIDINGER, Karen A.

Location & Date

[View larger map]
Location: Latitude: , Longitude:
General location information: Pinellas to Lee County., Florida.
HAB Area code(s): US-16
Additional location information:
Bloom event dates (yyyy/mm/dd): Start: 1990-02-23, End: 1990-03-22
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 233,000 cells/L; offshore (3 to 5 miles out) surface water samples ranged from negative to 153,000 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: > 30 Current Velocity: 0
Nutrient information:
Temperature Range During Event: Max: 15 °C, Min: 23 °C
Salinity Range During Event:
Bloom location in the water column:
Growth Comments Advected population from offshore waters.
Additional Environmental information: Occurred in coastal and nearshore waters.

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 ban 26/2/90 - 3723 Longboat Key, Sarasota County
Additional harmful effect information: Reports of disoriented and sick sea birds (particularly cormorants) Some respiratory irritation on Siesta and Lido beaches (373 - 4/3/90). Reports of dead birds and a few fish off Clearwater (9/2/90). Reports of dead birds and dolphin at Egmont Key (9/2/9
Updated at 06:26 on 2 Nov 2020