Harmful Algal Information System: Event US-96-002

General Information

Event name:	US-96-002
Country:	UNITED STATES
Nature of the harmful event:	Water Discoloration , Seafood toxins , Mass mortalities
Event directly affected:	Humans
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.

Microalgae

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:

Growth:

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: