General Information

Event name: US-06-016
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 2104 micrograms PSP toxin at Birch Bay)
Associated syndrome: PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector): PSP = Blue Mussels, Manila Clams and Pacific Oysters
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 (Most of hte inlets of North Puget Sound have had previous PSP closures)
Individuals to contact: COX, Frank

Location & Date

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Location: Latitude: , Longitude:
General location information: Washington state, North Puget Sound, Pacific Northwest
HAB Area code(s): US-24
Additional location information: PSP = Drayton Harbor, a north Puget Sound area located at the Canadian border and Birch Bay in Whatcom County.
Bloom event dates (yyyy/mm/dd): Event Date:2006-06-07
Start: 2006-06-07, End: 2006-11-30
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Recreational Shellfish PSP closures - Whatcom Co. began 6/07/06 and ended by 11/16/06. San Juan County PSP 6/8/06 -- 11/30/06. Skagit county PSP 6/30/06 -- 11/30/06. Island County PSP 8/23/06 -- 01/26/07. Commercial PSP closure - samish Bay, Skagit county 9/19/06 -- 11/17/07 for Pacific Oysters.


Causative organism known: Yes
Causative Species/Genus: Alexandrium catenella ( 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
Blue Mussels - PSP Saxitoxins 2104 micrograms/100g Bioassay-Mouse
Kit used: No Type of kit used:
Additional information: max concentration was per 100 grams of shellfish tissue on 6/08/06 in Blue mussels at Birch Bay.
Economic losses: Recreational and commercial shellfish harvest seasons were interrupted, causing an economic loss to the north puget sound washington communities.
Management decision: DOH closed shellfish harvesting at impacted areas to protect public health.
Additional harmful effect information: