General Information

Event name: US-18-012
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 200 ppm DA)
Associated syndrome: ASP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector): Razor clams, Dungeness crab
Report the outcome of a monitoring programme: Yes (Oregon Department of Agriculture marine biotoxin monitoring)
Event occurred before in this location: Yes (Annually for past three years)
Individuals to contact: Manderson, Alex

Location & Date

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Location: Latitude: , Longitude:
General location information: Southern Oregon Coast,
HAB Area code(s): US-22
Additional location information:
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd): First detection: 2018-01-01, End: 2018-12-31
Additional date-related information: Persistent toxicity in razor clams


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: Oxygen content (nL/L): Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: Current Velocity:
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
Razor clams Domoic Acid 230 ppm LC
Dungeness crab Domoic Acid 99 ppm LC
Kit used: Type of kit used:
Additional information:
Economic losses: Very disruptive for Oregon Dungeness crab fishery because of delays in opening the season and loss of market confidence because of these delays.
Management decision: Delay commercial season opening, close recreational fishery.
Additional harmful effect information:
Created at 09:51 on 28 Mar 2019