General Information

Event name: US-14-012
Nature of the harmful event:
High Phyto concentration , Seafood toxins
Event directly affected:
Natural Fish
Toxicity detected: Yes
Associated syndrome: Aerosolized toxins effects , NSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector): no documented human illnesses
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: 29.016667, Longitude:
General location information: Cedar Key (Levy/Dixie counties), West Coast of Florida
HAB Area code(s): US-16
Additional location information: bloom spanned inshore/offshore waters but was spatially and temporally patchy
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd): First detection: 2014-09-05, End: 2014-11-07
Additional date-related information: 8/16/14-10/1/2014


Causative organism known: Yes
Causative Species/Genus: Karenia brevis (2300000 cells/L)
Dinophyceae. NSP producer
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography:

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: 30.6 °C, Min: 24.9 °C
Salinity Range During Event: Max: 35.08, Min: 17.1
Bloom location in the water column:
Growth: Advected
Growth Comments bloom 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 29MU/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 07:54 on 8 Feb 2017
Updated at 09:35 on 14 May 2018