General Information

Event name: US-10-004
Nature of the harmful event:
Water Discoloration , High Phyto concentration
Event directly affected:
Toxicity detected: No
Associated syndrome:
Unexplained toxicity: No
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: 29.183056, Longitude: -91.616667
General location information: cross-shelf transect W of the mouth of the Atchafalaya River, Gulf of Mexico, Lousiana
HAB Area code(s): US-17
Additional location information: Reddish/brown water observed on 8/23/10 during routine monitoring cruise. Water discoloration seemed to extend under the surface. Coverage or extent of bloom unknown in west-east direction, but was not observed again in the S-N direction of the transect.
Bloom event dates (yyyy/mm/dd): Event Date:2010-08-23
Start: 2010-08-23,
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus:
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: 20.3 µg/l
Additional bloom information: Chlorophyll might not have been measured with the actual bloom, as the bloom was patchy and environmental parameters were measured with a CTD
Event-related bibliography:

Environmental Conditions

Weather: calm, warm, sunny Turbidity (NTU): Wind direction:
Stratified water: Oxygen content (nL/L): 6.44 Wind velocity:
Temperature (°C): 31.3 Oxygen saturation %: 143.6 Current Direction:
Sechhi disk (m): 2.2 Salinity: 30.1 Current Velocity:
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:
Updated at 05:44 on 15 Apr 2015
Checked at 05:44 on 15 Apr 2015