General Information

Event name: US-05-011
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: Yes (This area frequently sees high concentrations of the species listed in Section 3 below.)
Individuals to contact: RABALAIS, Nancy

Location & Date

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Location: Latitude: , Longitude:
General location information: Barataria Bay, Louisiana,
HAB Area code(s): US-17
Additional location information: Tidal estuary with salinity fluctuations.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: The species data below represents cell concentrations of HAB species above 10^5 cells/liter, with the exception of Prorocentrum which is reported above 10^4 and Anabaena spp. which are reported above 10^6. Cell concentrations were averaged over five stations in the estuary to generate an average concentration for each species on a single sample date. Data is from surface samples collected during routine sampling for the period Jan-Aug 2005 and were not associated with a particular bloom event.


Causative organism known: Yes
Causative Species/Genus: Anabaena spp. (2.1x10^6 cells/L)
Heterocapsa rotundata (1.9x10^5 cells/L)
Planktolyngbya contorta (1.2x10^6 cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: Other species detected include Aphanizomenon, and R. curvata.
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: