General Information

Event name: US-07-007
Nature of the harmful event:
Water Discoloration , High Phyto concentration , Seafood toxins , Mass mortalities
Event directly affected:
Planktonic life , Natural Fish , Shellfish , Aquatic Mammals , Humans
Toxicity detected: Yes (Approximate range: 0-52.8 MU/100g)
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 FL Redtide Monitoring Program)
Event occurred before in this location: Yes (This is the 7th 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: , Longitude:
General location information: Florida East Coast, Atlantic Ocean
HAB Area code(s): US-15
Additional location information:
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd): First detection: 2007-09-25, End: 2007-12-27
Additional date-related information: Start 9/24/07, end 1/9/08


Causative organism known: Yes
Causative Species/Genus: Karenia brevis (6,030,000 cells/L)
Co-Ocurring Species/Genus: Karenia selliformis Haywood et al. 2004 (500000 cells/L)
Karenia Selliformis-LIKE
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): 25.9 Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: 31.1 Current Velocity: 0
Nutrient information:
Temperature Range During Event: Max: 29 °C, Min: 17 °C
Salinity Range During Event: Max: 37, Min: 22
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/100g Bioassay-Mouse
Kit used: 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: Multiple species (Fish, manatees, turtles). ELISA data available.
Updated at 08:04 on 29 Jul 2020