General Information

Event name: US-96-006
Country: UNITED STATES
Nature of the harmful event:
Water Discoloration
Event directly affected:
Humans
Toxicity detected: Yes
Associated syndrome: OTHER
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes
Event occurred before in this location: No
Individuals to contact: BYRD, Lewis A.

Location & Date

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Location: Latitude: , Longitude:
General location information: Coastal Alabama., Alabama.
HAB Area code(s): US-17
Additional location information:
Bloom event dates (yyyy/mm/dd): Start: 1996-10-23, End: 1996-12-06
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:

Microalgae

Causative organism known: Yes
Causative Species/Genus: Gymnodinium breve ( 400,000 cells/L)
Inshore and bay water samples.
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: No Oxygen content (nL/L): Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: Current Velocity: 0
Nutrient information:
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event:
Bloom location in the water column:
Growth: Advected
Growth Comments Advected population from West Florida waters (Perido Bay area). The population moved westward along Alabama coastal waters and was carried into Mobile Bay and Mississippi Sound waters due to unusual wind and current conditions.
Additional Environmental information: Occurred in near shore beach areas of Gulf Shores and Fort Morgan with salinity ranging from 24 ppt to 27 ppt and temperature ranging 20 ºC to 25 ºC and Mobile Bay and Mississippi Sound areas with salinity ranging 7 ppt to 27 ppt (High salinity was record

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Brevetoxins Bioassay-Mouse
Kit used: No Type of kit used:
Additional information:
Economic losses:
Management decision: Shellfish harvest closure 10 November to 6 December due to Gymnodinium breve red tide in Alabama coastal waters. Public Health notice issued 29 October for Gulf Shores Area.
Additional harmful effect information:
IOC/UNESCO ISSHA
IOC/UNESCO ICES PICES