General Information

Event name: US-11-024
Nature of the harmful event:
Water Discoloration , High Phyto concentration , Seafood toxins
Event directly affected:
Toxicity detected: No
Associated syndrome: PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector): Pryodinium bahamense
Report the outcome of a monitoring programme: Yes (Fish and Wildlife Research Institute HAB Monitoring Program: Event Response)
Event occurred before in this location: Yes (Annually since 2004)
Individuals to contact: SCOTT, Paula

Location & Date

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Location: Latitude: , Longitude:
General location information: Tampa Bay, West Coast of Florida
HAB Area code(s): US-16
Additional location information: 28.0315 to 27.875 N; 82.698920 to 82.58148 W
Bloom event dates (yyyy/mm/dd): Event Date:2011-06-20
Start: 2011-06-20, End: 2011-08-24
Quarantine levels dates (yyyy/mm/dd): First detection: 2011-06-20, End: 2011-08-24
Additional date-related information: 11 miles N to S, 11 miles W to E; Bay system


Causative organism known: Yes
Causative Species/Genus: Pyrodinium bahamense (978,611 cells/L)
saxitoxin producer
Co-Ocurring Species/Genus: Peridinium quinquecorne Abé 1927 (>1,000,000 cells/L)
non toxic
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography:

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: No Oxygen content (nL/L): Wind velocity:
Temperature (°C): 29.1 Oxygen saturation %: 43.5 Current Direction:
Sechhi disk (m): Salinity: 21.59 Current Velocity:
Nutrient information:
Temperature Range During Event: Max: 32.3 °C, Min: 28.1 °C
Salinity Range During Event: Max: 26.04, Min: 9.23
Bloom location in the water column: Whole column
In situ
Growth Comments
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: Type of kit used:
Additional information:
Economic losses: Shellfish harvesting is prohibited in the areas affected. The bloom did not reach the lower portion of the bay when harvesting is permitted.
Management decision: None necessary.
Additional harmful effect information:
Updated at 04:19 on 15 Apr 2015
Checked at 04:20 on 15 Apr 2015