General Information

Event name: US-08-017
Nature of the harmful event:
Water Discoloration , High Phyto concentration , Seafood toxins
Event directly affected:
Shellfish , Humans
Toxicity detected: Yes (Approximate range: 0ug OA/100g - 68.1ug OA/100g oyster)
Associated syndrome: DSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector): Dinophysis ovum (originally indentified as D. acuminata). Shellfish confirmed toxic by the FDA. No human intoxications.
Report the outcome of a monitoring programme: Yes (The CICEET-funded Imaging Flow CytoBot first detected D. ovum coming in at Aransas Pass. IFBC)
Event occurred before in this location: No
Individuals to contact: Byrd, Meridith

Location & Date

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Location: Latitude: 28.300278, Longitude: -95.849167
General location information: Texas coast (Between Galveston Bay and CCB),
HAB Area code(s): US-18
Additional location information: D. ovum cells were found in varying concentrations from Galveston Bay to Corpus Christi Bay. Aransas Bay had the highest concentrations of both D. ovum cells and okadaic acid. Celss were detected both offshore and inshore; offshore bloom stretched all the way to Brazos-Santiago Pass near the Mexico border.
Bloom event dates (yyyy/mm/dd): Event Date:2008-02-14
Quarantine levels dates (yyyy/mm/dd): First detection: 2008-03-06, End: 2008-04-08
Additional date-related information: 2/14/08 Lisa Campbell notified Meridith Byrd of increasing concentrations of D. ovum being detected by the Imaging Flow CytoBot deployed at Aransas Pass. Discolored water first seen Sat., 3/1/08 in a Port Aransas marina. All bays reopened to shellfish harvesting 4/8/08


Causative organism known: Yes
Causative Species/Genus: Dinophysis ovum Schütt sensu Martin 1929 (3333 cells/L)
3/6/08 Rockport, TX
Co-Ocurring Species/Genus: Prorocentrum sp. (9000 cells/L)
4/4/08 Pass Cavallo, TX
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography: Lisa Campbell is publishing a paper on the event in the Journal of Phycology. Kathleen Swanson's paper, The 2008 Texas Dinophysis ovum Bloom: Distribution and Toxicity, is being published in Harmful Algae.

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: 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: Type of kit used:
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Economic losses:
Management decision:
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