General Information

Event name: US-95-018
Nature of the harmful event:
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
Event occurred before in this location: Yes (Brownsville Ship Channel, Dec. 1990.)
Individuals to contact: REISINGER, Tony , STOCKWELL, Dean A.

Location & Date

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Location: Latitude: , Longitude:
General location information: Lower Laguna Madre., Texas.
HAB Area code(s): US-18
Additional location information: Lower Laguna Madre, South Texas.
Bloom event dates (yyyy/mm/dd): Start: 1995-09-25, End: 1995-09-26
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Gymnodinium breve (56,000 - 6 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: 29 °C, Min: 27 °C
Salinity Range During Event: Max: 38, Min: 35
Bloom location in the water column:
Growth: Advected
Growth Comments Assumed to be advected from Gulf of Mexico.
Additional Environmental information: Initial blooms occurred in Marina Channel, spread to shallow lagoon environment. Seagrass dominated bottom, water depth 1 meter.

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: None taken.
Additional harmful effect information: