General Information

Event name: US-07-005
Nature of the harmful event:
Water Discoloration , High Phyto concentration , Seafood toxins , Mass mortalities
Event directly affected:
Planktonic life , Natural Fish , 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 (2005)
Individuals to contact: TRUBY, Earnest W.

Location & Date

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Location: Latitude: , Longitude:
General location information: Northwest Florida, Gulf of Mexico
HAB Area code(s): US-16
Additional location information:
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Detection: 9/26/07, Final date: 12/19/07, Start 8/15/07, end 12/27/07


Causative organism known: Yes
Causative Species/Genus: Karenia brevis (3530000 cells/L)
Co-Ocurring Species/Genus: Karenia papilionacea (9300 cells/L)
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: N
Stratified water: No Oxygen content (nL/L): 7.1 Wind velocity: 1.7 kts
Temperature (°C): 20.6 Oxygen saturation %: 95.6 Current Direction:
Sechhi disk (m): 3.5 Salinity: 32.1 Current Velocity: 0
Nutrient information:
Temperature Range During Event: Max: 26 °C, Min: 14 °C
Salinity Range During Event: Max: 37, 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/100g Bioassay-Mouse
Kit used: No Type of kit used:
Additional information:
Economic losses: Closed shellfish beds, no estimate of loss.
Management decision: Followed Biotoxin Controll Plan-closed shellfish harvesting areas affected; open when < 20 MU/100g
Additional harmful effect information:
Updated at 08:03 on 29 Jul 2020