General Information

Event name: US-05-005
Nature of the harmful event:
Water Discoloration , High Phyto concentration , Seafood toxins , Mass mortalities
Event directly affected:
Planktonic life , Natural Fish , Birds , Shellfish , Aquatic Mammals , Humans
Toxicity detected: Yes (Approximate range: 18.08-96.9 MU/100g)
Associated syndrome: NSP , Aerosolized toxins effects
Unexplained toxicity:
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 annual between Pinellas and Lee Counties)
Individuals to contact: TRUBY, Earnest W. , HEIL, Cynthia A.

Location & Date

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Location: Latitude: 25.000000, Longitude: -81.000000
General location information: Southwest Florida, Gulf of Mexico
HAB Area code(s): US-16
Additional location information:
Bloom event dates (yyyy/mm/dd): Event Date:2005-01-06
Start: 2005-01-06, End: 2005-12-31
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Bloom continued into 2006


Causative organism known: Yes
Causative Species/Genus: Karenia brevis ( cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: 0.41-31.67 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): 7.73 Wind velocity:
Temperature (°C): 23.17 Oxygen saturation %: 137.2 Current Direction:
Sechhi disk (m): bottom 1.7 Salinity: 36.3 Current Velocity: 0
Nutrient information:
Temperature Range During Event: Max: 34 °C, Min: 14 °C
Salinity Range During Event: Max: 37, Min: 21
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 96.90 MU/100g Bioassay-Mouse
Kit used: No Type of kit used:
Additional information: Multiple species (fish, manatees, birds, turtles). ELISA data available
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 07:19 on 29 Jul 2020