General Information

Event name: US-07-003
Nature of the harmful event:
Water Discoloration , High Phyto concentration , Seafood toxins , Mass mortalities
Event directly affected:
Planktonic life , Natural Fish , Birds , Aquatic Mammals , Humans
Toxicity detected: Yes (Approximate range: 0-58.5 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 Florida Redtide Monitoring Program)
Event occurred before in this location: Yes (Almost annually between Pinellas and Lee Counties)
Individuals to contact: TRUBY, Earnest W.

Location & Date

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Location: Latitude: , Longitude:
General location information: West Florida, Gulf of Mexico
HAB Area code(s): US-16
Additional location information: Carried over from 2006. First bloom in SW ran 1/7/07-3/26/07. Second bloom in SW from 9/24/07-12/28/07. Bloom in NW ran 8/15/07-12/27/07.
Bloom event dates (yyyy/mm/dd): Start: 2007-01-07, End: 2007-12-28
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Karenia brevis (15500000 cells/L)
Co-Ocurring Species/Genus: Karenia mikimotoi (181000 cells/L)
Second SW bloom
Karenia papilionacea (7000 cells/L)
First SW bloom
Karenia papilionacea (9300 cells/L)
NW bloom
Chlorophyll concentration, if known: µg/l
Additional bloom information: Karenia brevis (3,530,000 cells/L) in NW Karenia brevis (15,500,000 cells/L) in first SW bloom Karenia brevis (14,059,000 cells/L) in second SW bloom
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): 6.96 Wind velocity:
Temperature (°C): 22.9 Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: 36.6 Current Velocity: 0
Nutrient information:
Temperature Range During Event: Max: 29 °C, Min: 14 °C
Salinity Range During Event: Max: 39, Min: 18
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 58.5 MU/100 g Bioassay-Mouse
Kit used: No Type of kit used:
Additional information: Multiple species (fish, manatees and turtles) ELISA data available.
Economic losses: Closed shellfish harvesting areas, no estimate of loss.
Management decision: Followed Biotoxin Control Plan, closed shellfish harvesting areas; open when < 20 MU/100g.
Additional harmful effect information:
Updated at 07:40 on 29 Jul 2020