Harmful Algal Information System: Event US-93-020

General Information

Event name:	US-93-020
Country:	UNITED STATES
Nature of the harmful event:	Seafood toxins
Event directly affected:
Toxicity detected:	Yes (Approximate range: 220 痢 STXeq / 100 g in sentinel sea mussels.)
Associated syndrome:	PSP
Unexplained toxicity:	No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme:	Yes (Shellfish Monitoring Program. State of California Department of Health Services. (SCDHS).)
Event occurred before in this location:	Yes (1969, '71, '73, '89, '92, '93.)
Individuals to contact:	ROSS, Maria R.

Location & Date

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Location:	Latitude: , Longitude:
General location information:	Humboldt County., California. HAB Area code(s): US-21
Additional location information:
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:	May-October.

Microalgae

Causative organism known:	No
Causative Species/Genus:
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known:	µg/l
Additional bloom information:
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: °C, Min: °C

Salinity Range During Event:

Bloom location in the water column:

Growth:

Growth Comments

Additional Environmental information:

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:

Special quarantine was extended to Dec. 15.

Additional harmful effect information:

In May-Sept. The sentinel sea mussel contained high measurable concentrations of PSP which in Oct. elevated to 220 痢. Also, the sentinel sea mussel concentrations during April, May, Sept. Oct. although below alert levels were in the measurable range.