General Information

Event name: US-15-009
Nature of the harmful event:
High Phyto concentration , Seafood toxins
Event directly affected:
Natural Fish , Humans
Toxicity detected: Yes (Approximate range: 25-95 mouse units per 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 (FWC/FWRI HAB Monitoring Program)
Event occurred before in this location: Yes (sporadic (i.e. not annually))
Individuals to contact: HUBBARD, Katherine

Location & Date

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Location: Latitude: 30.000000, Longitude:
General location information: Northwest Florida, Florida Panhandle
HAB Area code(s): US-16
Additional location information: bloom spanned inshore/offshore waters and was spatially and temporally patchy across Northwest Florida
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd): First detection: 2015-10-16, End: 2015-12-31
Additional date-related information: 9/7/2015-12/31/2015 (extended into 2016)


Causative organism known: Yes
Causative Species/Genus: Karenia brevis (10833333 cells/L)
NSP producer, Dinophyceae
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: Oxygen content (nL/L): Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: Current Velocity:
Nutrient information:
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event:
Bloom location in the water column: Whole column
Growth: Advected
Growth Comments loom was patchy and originated offshore
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Eastern oyster, Crassostrea virginica Brevetoxins 95 MU/100g Bioassay-Mouse
Kit used: Type of kit used:
Additional information: Shellfish harvest is banned when K. brevis exceed 5,000 cells/L. Areas are reopened when K. brevis is <5,000 cells/L and shellfish are <20MU/100g.
Economic losses:
Management decision: shellfish harvest closure
Additional harmful effect information:
Created at 07:05 on 3 Feb 2017
Updated at 08:20 on 29 Jul 2020