General Information

Event name: US-03-011
Nature of the harmful event:
High Phyto concentration , Other ( Whater discoloration at times)
Event directly affected:
Toxicity detected: No
Associated syndrome:
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (Research program(s) but with long-term data)
Event occurred before in this location: Yes (This area frequently sees high concentrations of the species listed in Section 3 below; typical species and abundances over an annual cycle)
Individuals to contact: RABALAIS, Nancy

Location & Date

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Location: Latitude: 29.350000, Longitude: -89.750000
General location information: Barataria Bay, lat/lon about mid-basin., Lousiana.
HAB Area code(s): US-17
Additional location information: The species data listed in Section 3 below were compiled from several station locations in the estuary on a monthly basis. Do not know abundances between sample dates.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Heterocapsa rotundata (337,000 cells/L)
Date collected: 14/01/03
Heterocapsa rotundata (970,000 cells/L)
Date collected: 18/03/03
Gyrodinium sp. (200,000 cells/L)
Date collected: 15/04/03
Heterocapsa rotundata (1,990,000 cells/L)
Date collected: 15/04/03
Heterocapsa rotundata (266,000 cells/L)
Date collected:10/06/03
Cylindrospermopsis raciborskii (816,000 cells/L)
Date collected: 20/08/03
Raphidiopsis curvata (150,000 cells/L)
Date collected: 20/08/03
Heterocapsa rotundata (422,000 cells/L)
Date collected:15/12/03
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 Comments
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: No Type of kit used:
Additional information:
Economic losses:
Management decision:
Additional harmful effect information: