General Information

Event name: US-09-001
Nature of the harmful event:
Water Discoloration , High Phyto concentration , Seafood toxins , Mass mortalities
Event directly affected:
Natural Fish , Other Terrestrial , Shellfish , Humans
Toxicity detected: Yes
Associated syndrome: NSP , Aerosolized toxins effects
Unexplained toxicity:
Species implicated in toxin transmission (transvector): Intoxication and deaths of coyotes and domestic dogs along Padre Island National Seashore due to ingestion of dead fish. Shellfish toxicity confirmed by FDA.
Report the outcome of a monitoring programme: No
Event occurred before in this location: Yes (Texas has K brevis blooms every few years.)
Individuals to contact: Byrd, Meridith

Location & Date

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Location: Latitude: , Longitude:
General location information: Texas coast, from Port Aransas to Mexico border,
HAB Area code(s): US-18
Additional location information: At one point during the bloom, discolored water and dead fish could be fond along the GUlf beaches from POrt Aransas to the Rio Grande, which is the border with Mexico (approximately 150 miles). We have no information on the extent of the Mexico bloom.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd): First detection: 2009-01-11, End: 2010-02-28
Additional date-related information: South Bay reopened 137 days later


Causative organism known: Yes
Causative Species/Genus: Karenia brevis (42,000,000 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: Oxygen content (nL/L): Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: 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: The National Park Service had a lab in Colorado perform toxin analysis on tissues from some of the dead coyotes and dogs that had ingested toxic fish along Padre Island National Seashore. The tissues contain high brevetoxin levels, but I do not know the specifics.
Economic losses:
Management decision: Padre Island National Seashore instituted a temporary ban on dogs from Nov 24, 2009 through mid-or late December. The Texas Dept of State Health Services never opened shellfish season for Corpus Christi or Aransas bays and they remain closed to date.
Additional harmful effect information:
Updated at 06:45 on 14 May 2018