General Information

Event name: US-96-017
Nature of the harmful event:
Water Discoloration
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
Event occurred before in this location: Yes (Brown Tide: Bloom started in December 1989 and has been present continuously in Baffin Bay and Laguna Madre to the present time.)
Individuals to contact: STOCKWELL, Dean A.

Location & Date

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Location: Latitude: , Longitude:
General location information: Upper Laguna Madre, Baffin Bay and lower Lagu, Texas.
HAB Area code(s): US-18
Additional location information: Brown Tide: Upper Laguna Madre, Baffin Bay and lower Laguna Madre. Nueces, Kleberg, Kenedy, Willacy and Cameron Counties.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Brown Tide: persistent throughout the entire year.


Causative organism known: Yes
Causative Species/Genus: Aureoumbra lagunensis (4,000,000, 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: 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:
In situ
Growth Comments
Additional Environmental information: Brown Tide: Confined to Baffin Bay and Laguna Madre. Environmental conditions same as last year.

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: Brown Tide: same as last year.
Additional harmful effect information: water discoloration continues, same as last year.