General Information

Event name: US-00-008
Nature of the harmful event:
Water Discoloration , Mass mortalities
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 (Texas Department of Parks and Wildlife.)
Event occurred before in this location: Yes (This region is known for water discoloration events, not all of which have been identified.)
Individuals to contact: DORTCH, Quay , VILLAREAL, Tracy

Location & Date

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Location: Latitude: , Longitude:
General location information: Sabine and Calcasieu Lakes., Louisiana, Gulf of Mexico.
HAB Area code(s): US-17
Additional location information: Between Sabine and Calcasieu Lakes and up to 20 mi offshore in Louisiana coastal waters.
Bloom event dates (yyyy/mm/dd): Start: 2000-08-11, End: 2000-08-23
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: No
Causative Species/Genus: Gymnodinium breve ( cells/L)
Probably. This was an extension of much larger and more persistent bloom in Texas waters. The State of Louisiana chose not to investigate.
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: