General Information

Event name: US-93-012
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: No
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 (The last Oregon PSP alert began on the northern beaches in August 1992 in mussels and continued to be present in razor clams through 1993.)
Individuals to contact: CANNON, Deborah F.

Location & Date

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Location: Latitude: , Longitude:
General location information: Oregon coast., Oregon.
HAB Area code(s): US-22
Additional location information: From Yachats to the California border, but not in the bays.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: PSP in mussels began in August.


Causative organism known: No
Causative Species/Genus: Alexandrium catenella ( cells/L)
Not confirmed
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: Causative species not confirmed, thought to be Alexandrium catenella.
Event-related bibliography:

Environmental Conditions

Weather: Typical late summer and fall weather conditions. Fall rains began in early November which is later than usual. 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: 13 °C, Min: 10 °C
Salinity Range During Event: Max: 30, Min: 25
Bloom location in the water column:
Growth Comments Not known.
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: Mussels was the only species affected.
Economic losses:
Management decision: Commercial and recreational shellfish harvesting was closed on the beaches only, between late August and early November. Bay clamming was not closed.
Additional harmful effect information: