Harmful Algal Information System: Event US-91-014

General Information

Event name:	US-91-014
Country:	UNITED STATES
Nature of the harmful event:	Seafood toxins
Event directly affected:
Toxicity detected:	Yes (Approximate range: 99 痢 STXeq / 100 g.)
Associated syndrome:	PSP
Unexplained toxicity:	No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme:	Yes
Event occurred before in this location:	Yes (1971, 1984, 1989.)
Individuals to contact:	ROSS, Maria R.

Location & Date

[View larger map]

Location:	Latitude: , Longitude:
General location information:	Santa Cruz county., California. HAB Area code(s): US-20
Additional location information:	Natural Bridges, San Mateo/Santa Cruz Co. Line (Wild Sea Mussels).
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:	April - December.

Microalgae

Causative organism known:	Yes
Causative Species/Genus:	Alexandrium catenella ( cells/L)
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:

In situ

Growth Comments

Probably an in situ growth.

Additional Environmental information:

No data available.

Toxin Assay Information

Species containing the toxin	Toxin type	Toxin details	Max. concentration	Assay type
Wild Sea Mussels (San Mateo, Santa Cruz)	Saxitoxins	STX eq	99	Bioassay-Mouse
Wild Sea Mussels (Natural Bridges)	Saxitoxins	STX eq	85	Bioassay-Mouse

Kit used: No

Type of kit used:

Additional information:

Economic losses:

Management decision:

The California Annual Mussel Quarantine was in effect.

Additional harmful effect information:

The Wild Sea Mussels from San Mateo/Santa Cruz Co. Line assayed 99 痢/100 g of meat and from Natural Bridges 85 痢 in June and July respectively. Throughout the other months the levels of toxin reported were in high measurable but below the alert concentr