Harmful Algal Information System: Event US-90-012

General Information

Event name:	US-90-012
Country:	UNITED STATES
Nature of the harmful event:	Mass mortalities
Event directly affected:
Toxicity detected:	No
Associated syndrome:	NSP , Aerosolized toxins effects
Unexplained toxicity:	No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme:	Yes
Event occurred before in this location:	Yes (Feb-March 1990, March-May 1989, Oct-Dec 1988, Jan/Feb, May-July, Sept/Oct 1987, Sept-Dec 1986, Sept-Dec 1985, Jan-March, May-Aug 1984, Jan/Feb, Oct-Dec 1983, Jan-Apr, July-Oct 1982, Sept/Oct 1981, Jan/Feb, June-Nov 1980, and before)
Individuals to contact:	STEIDINGER, Karen A.

Location & Date

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Location:	Latitude: , Longitude:
General location information:	Sarasota to Collier County., Florida. HAB Area code(s): US-16
Additional location information:
Bloom event dates (yyyy/mm/dd):	Start: 1990-10-18, End: 1990-11-22
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:

Microalgae

Causative organism known:	Yes
Causative Species/Genus:	Gymnodinium breve ( cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known:	µg/l
Additional bloom information:	Coastal surface water samples ranged from negative to 6,300 cells/l; offshore (up to 20 nm out) surface water samples had a few live cells and immobile but potential cells (samples got too warm before observation).
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:	>32	Current Velocity:	0

Nutrient information:

Temperature Range During Event:

Max: 30 °C, Min: 28 °C

Salinity Range During Event:

Bloom location in the water column:

Growth:

Advected

Growth Comments

Advected population from offshore waters.

Additional Environmental information:

Occurred in coastal and nearshore water.

Toxin Assay Information

Species containing the toxin

Toxin type

Toxin details

Max. concentration

Assay type

Kit used:

Type of kit used:

Additional information:

Economic losses:

Management decision:

Shellfish ban 10/26 - 11/22 Lemon Bay and Gasparilla Sound.

Additional harmful effect information:

Dead fish - offshore about20 miles off Lee County and 'massive'fish kill' reported by SEAMAP cruise between 10 - 20 nautical miles offshore from Venice to Sanibel. Respiratory irritation and dead fish on Gasparilla Island.

Updated at 06:21 on 2 Nov 2020