General Information

Event name: US-96-002
Nature of the harmful event:
Water Discoloration , Seafood toxins , Mass mortalities
Event directly affected:
Toxicity detected: Yes
Associated syndrome: OTHER
Unexplained toxicity: Yes (Potential unknown toxicity.)
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes
Event occurred before in this location: No
Individuals to contact: STEIDINGER, Karen A.

Location & Date

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Location: Latitude: , Longitude:
General location information: Indian River Lagoon., Florida.
HAB Area code(s): US-15
Additional location information:
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: September-October, possibly August.


Causative organism known: Yes
Causative Species/Genus: Gymnodinium pulchellum (19,700,000 cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: Gymnodinium pulchellum Larsen 1994 also known as Gymnodinium sp. 'type 84-K' and Gymnodinium sp. (Japan). The Japanese Gymnodinium sp. Tested by Endo et al. 1992 contained oxidized brevetoxins.
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: 28 °C, Min: 26 °C
Salinity Range During Event: Max: 37, Min: 26
Bloom location in the water column:
In situ
Growth Comments
Additional Environmental information: Shallow lagoon.

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: Local shellfish beds were closed because of potential unknown toxicity until mouse bioassays for lipid-soluble toxins were run. Shellfish beds were reopened because mouse bioassays revealed no signs of toxicity.
Additional harmful effect information: