General Information

Event name: US-01-021
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 0 - 37.7 ppm DA.)
Associated syndrome: ASP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector): None.
Report the outcome of a monitoring programme: Yes (Oregon Dept of Agriculture, Shellfish Sanitation Program.)
Event occurred before in this location: Yes
Individuals to contact: CANNON, Deborah F.

Location & Date

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Location: Latitude: , Longitude:
General location information: Nehalem Bay., Oregon.
HAB Area code(s): US-22
Additional location information: This event was evident in shellfish toxicity along the north and central coast where mussels and razor clams are available for sampling. Other shellfish (oysters), tested in coastal bays, did not contain any levels of DA except mussels located in one bay "hanging" sample (Nehalem Bay) .
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Date of quarantine levels: 22/03/01 - 06/12/01. This event may have actually been two Domoic Acid (DA) events. No new DA apparent in Jan/Feb monitoring.


Causative organism known: Yes
Causative Species/Genus: Pseudo-nitzschia spp. ( 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 Comments
Additional Environmental information:

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:
Additional harmful effect information: This event may have actually been two Domoic Acid (DA) events. No new DA apparent in Jan/Feb monitoring. Clatsop Beach razor clams were < 2 ppm on 2/7/01. In early 3/01 DA levels elevated in North & Central coast mussels (2.1 - 4.6 ppm) which are usual
Updated at 03:40 on 26 Jun 2020