General Information

Event name: US-10-003
Nature of the harmful event:
Water Discoloration , High Phyto concentration , Seafood toxins
Event directly affected:
Natural Fish , Other Terrestrial , Shellfish
Toxicity detected: Yes (Approximate range: 360 g/kg)
Associated syndrome: NSP , Aerosolized toxins effects
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (FWC / FWRI HAB Monitoring Program)
Event occurred before in this location: Yes
Individuals to contact: SCOTT, Paula

Location & Date

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Location: Latitude: , Longitude:
General location information: Southwest Florida, 4
HAB Area code(s): US-16
Additional location information: 70 miles of shoreline from northern Lee to southern Collier counties
Bloom event dates (yyyy/mm/dd): Start: 2009-02-09, End: 2010-10-25
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Karenia brevis ( cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography: Foley, A., Stacy, B. A., Schueller, P., Flewelling, L. J., Schroeder, B., Minch, K., Fauquier, D. A., Foote, J. J., Manire, C., Atwood, K. E., Granholm, A. A., Landsberg, J. H., 2019. Assessing Karenia brevis red tide as a mortality factor of sea turtles in Florida. Dis. Aquat. Org. 132, 109124.

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: Oxygen content (nL/L): Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: Current Velocity:
Nutrient information:
Temperature Range During Event: Max: 30.87 °C, Min: 11 °C
Salinity Range During Event: Max: 37.3, Min: 29.8
Bloom location in the water column: Whole column
Growth Comments
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
clams and oysters Brevetoxins 36.38 g/100 g Bioassay-Mouse
Kit used: No Type of kit used:
Additional information:
Economic losses:
Management decision: Shellfish harvesting area closures until Karenia brevis cell counts fell below 5,000 cells/L and shellfish NSP fell below 20 MU/100 grams
Additional harmful effect information:
Updated at 08:09 on 29 Jul 2020
Checked at 05:47 on 15 Apr 2015