General Information

Event name: US-06-009
Nature of the harmful event:
High Phyto concentration
Event directly affected:
Toxicity detected: No
Associated syndrome:
Unexplained toxicity:
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: No
Event occurred before in this location:
Individuals to contact: RABALAIS, Nancy

Location & Date

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Location: Latitude: , Longitude:
General location information: Gulf of Mexico, Louisiana
HAB Area code(s): US-17
Additional location information: Cross-shelf research transect W of the mouth of the Atchafalaya River, Gulf of Mexico. Transect begins at 29.2733 N/91.6167 W and ends at 28.6917 N/91/6167 W.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Species data below represent cell concentrations of HAB species from surface samples collected during routine sampling and were not associated with a particular bloom event. This transect is sampled every other month and since Oct. and Dec. 2006 weren't sampled due to weather, the data coverage is Feb, April, June, July, and Aug. 2006 only. Species are reported at 10^5 cells/liter with the exception of Prorocentrum spp. and Dinophysis spp. which are reported at 10^3, and Alexandrium monilatum and Karenia brevis which are reported when detected at any concentration. Cell concentrations were averaged over the four phytoplankton stations in the transect to generate an average concentration for a single sample data.


Causative organism known: Yes
Causative Species/Genus: Prorocentrum minimum (1.54x10^3 cells/L)
Prorocentrum scutellum (3.38x10^3 cells/L)
Heterocapsa rotundata (2.33x10^5 cells/L)
Prorocentrum minimum (3.87x10^3 cells/L)
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: 0
Nutrient information:
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event:
Bloom location in the water column:
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:
Management decision:
Additional harmful effect information: