General Information

Event name: US-02-009
Nature of the harmful event:
Water Discoloration , High Phyto concentration , Seafood toxins , Mass mortalities , Other ( Human respiratory)
Event directly affected:
Natural Fish , Humans
Toxicity detected: Yes (Approximate range: 0-74.8 MU.)
Associated syndrome: NSP , Aerosolized toxins effects
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (State of Florida Redtide Monitoring Program)
Event occurred before in this location: Yes (last occurred in 1999)
Individuals to contact: STEIDINGER, Karen A.

Location & Date

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Location: Latitude: 27.338056, Longitude: -80.232778
General location information: Florida east coast., Florida.
HAB Area code(s): US-15
Additional location information: SE USA. 27.3381 to 28.3753 N; 80.2328 to 80.6066 W.
Bloom event dates (yyyy/mm/dd): Start: 2002-11-04, End: 2002-12-30
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Karenia brevis (12,400,000 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: 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: 27 °C, Min: 16 °C
Salinity Range During Event: Max: 38, Min: 22
Bloom location in the water column:
Growth: Advected
Growth Comments
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Karenia brevis Brevetoxins 74.8 MU Bioassay-Mouse
Kit used: Type of kit used:
Additional information:
Economic losses: Closed shelfish beds-no estimate of loss.
Management decision: followed Biotoxin Control Plan-closed shellfish harvesting area affected; opened when <20 MU
Additional harmful effect information:
Updated at 06:59 on 28 Jul 2020