General Information

Event name: US-92-017
Nature of the harmful event:
Seafood toxins , Mass mortalities
Event directly affected:
Natural Fish , Humans
Toxicity detected: Yes (Approximate range: 88 g 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: No
Individuals to contact: CANNON, Deborah F.

Location & Date

[View larger map]
Location: Latitude: 46.116667, Longitude:
General location information: Oregon coast., Oregon.
HAB Area code(s): US-22
Additional location information: from Reedsport to the Columbia River (ca. 43.7 - 46.7 N)
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Started in late July - early August with mussels ca 88 g/100g; peaked in late September - early October with mussels, oysters, and little neck clams affected; November - razor clams affected.


Causative organism known: No
Causative Species/Genus:
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: Not confirmed
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 Comments
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Mussels (early August) Saxitoxins 88 Bioassay-Mouse
Kit used: No Type of kit used:
Additional information:
Economic losses: Closure of razor clam commercial and recreational harvest caused severe economic problems for at least 2 businesses; mussel harvest also closed, but most is done south of the closure area.
Management decision: Harvest closure for all shellfish north of Reedsport as of 12 August; oysters and bay clams lot sampled in September & October; shellfish other than razor clams and mussels released from closure in early November; razor clams and mussels remained closed t
Additional harmful effect information: