General Information

Event name: US-08-002
Nature of the harmful event:
High Phyto concentration , Seafood toxins , Mass mortalities
Event directly affected:
Planktonic life , Natural Fish , Shellfish
Toxicity detected: Yes (Approximate range: 0-52.8 MU/100 g)
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 (This was the end of the seventh event on the east coast. The last one was in 2002.)
Individuals to contact: TRUBY, Earnest W. , HEIL, Cynthia A.

Location & Date

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Location: Latitude: 27.821667, Longitude: -80.281944
General location information: Florida East Coast, Atlantic Ocean
HAB Area code(s): US-15
Additional location information:
Bloom event dates (yyyy/mm/dd): End: 2008-01-09
Quarantine levels dates (yyyy/mm/dd): End: 2008-01-09
Additional date-related information: 2007-09-25 event/quarantine start


Causative organism known: Yes
Causative Species/Genus: Karenia brevis (130600 cells/L)
Taxonomical Class: Dinophyceae
Co-Ocurring Species/Genus: Karenia umbella de Salas et al. 2004 (7000 cells/L)
Taxonomical Class: Dinophyceae
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): 9.7 Wind velocity:
Temperature (°C): 17.1 Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: 29.6 Current Velocity: 0
Nutrient information:
Temperature Range During Event: Max: 18 °C, Min: 17 °C
Salinity Range During Event: Max: 34, Min: 27
Bloom location in the water column: Whole 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 52.8 MU/100 g Bioassay-Mouse
Kit used: No Type of kit used:
Additional information:
Economic losses: Closed shellfish beds, no estimate of loss.
Management decision: followed Biotoxin Control Plan - closed shellfish harvesting areas affected; opened when <20 MU
Additional harmful effect information:
Updated at 08:05 on 29 Jul 2020