General Information

Event name: US-99-009
Nature of the harmful event:
Water Discoloration , High Phyto concentration
Event directly affected:
Toxicity detected: No
Associated syndrome:
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: No
Event occurred before in this location: Yes
Individuals to contact: MONCREIFF, Cynthia A.

Location & Date

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Location: Latitude: 30.255000, Longitude: -88.773333
General location information: ca. 1 mile N of west tip of Horn Island., Gulf of Mexico, Florida.
HAB Area code(s): US-17
Additional location information:
Bloom event dates (yyyy/mm/dd): Event Date:1999-05-26
End: 1999-01-06
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Initial date: not known. No additional samples containinig species were collecteed after 6/1/99.


Causative organism known: Yes
Causative Species/Genus: Dinophysis caudata (5,250 cells/L)
Discolored water observed on a collecting trip associated with a GCRL Summer Field Program course
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: Not performed. µg/l
Additional bloom information: A lis of other genera of microalgae (predominantly diatoms) present in association with the bloom is available on request. Cysts: none observed.
Event-related bibliography: None.

Environmental Conditions

Weather: Warm and sunny. Turbidity (NTU): Wind direction:
Stratified water: No Oxygen content (nL/L): Wind velocity:
Temperature (°C): 31 Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: 29 Current Velocity: 0
Nutrient information:
Temperature Range During Event: Max: 31 °C, Min: 30 °C
Salinity Range During Event: Max: 31, Min: 29
Bloom location in the water column:
Growth Comments Assume advected population. Cell numbers low, bloom very short-lived; suggests advected.
Additional Environmental information: Wind direction: Variable. Wind velocity: 0 - 5 kt.

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: None reported
Management decision: None taken
Additional harmful effect information: None reported