General Information

Event name: US-07-021
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 1 ppm - 15 ppm of DA)
Associated syndrome: ASP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector): Razor Clams
Report the outcome of a monitoring programme: Yes (WA Dept. of Health, office of Shellfish and Water Protection, Marine Biotoxin Monitoring Program)
Event occurred before in this location: Yes (WA Coast has been impacted by ASP on a y early cycle since 1991)
Individuals to contact: COX, Frank

Location & Date

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Location: Latitude: , Longitude:
General location information: Coastal beaches and estuaries, Washington, Pacific Northwest
HAB Area code(s): US-23
Additional location information: Kalaloch, Mocrocks Beaches and Quinault Reservation.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: DA never reached quarantine levels on the outside coast during 2007. ASP blooms in 2007 did not prevent the spring or fall 2007 razor clam seasons from opening. Crab season was not affected by DA in 2007 either.


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: 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
Razor Clams Domoic Acid See Below LC
Kit used: No Type of kit used:
Additional information: Max Concentration: 115 ppm on 2/15/07 in razor clams at Kalaloch. 4 ppm on 2/09/07 in razor clams at Quinault Reservation. 4 ppm on 5/14/07 in razor clams at Mocrocks.
Economic losses: Recreational and commercial razor clam seasons were not interrupted due to DA in 2007.
Management decision:
Additional harmful effect information: