General Information

Event name: US-05-025
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 379 micrograms PSP toxin + 68 ppm Domoic Acid)
Associated syndrome: ASP , PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector): PSP = Blue Mussels
Report the outcome of a monitoring programme: Yes (WA Dept. of Health, office of Shellfish & Water Protection, Marine Biotoxin Monitoring Program)
Event occurred before in this location: Yes (Most of the inlets of North Puget Sound have had previous PSP closures. This is the first ASP bloom & closure in N. Puget Sound.)
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 in Whatcom County. ASP = Penn Cove, Holmes Harbor and Saratoga Passage
Bloom event dates (yyyy/mm/dd): Start: 2005-05-13, End: 2005-08-01
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Recreational shellfish PSP closures - Whatcom Co. began 5/13/05 and ended by Aug. 1, 2005. San Juan County PSP 6/9/05 -- 7/21/05. Bellingham Bay 10/11/05 -- 12/8/05. ASP closures Island Co- Penn Cove, Holmes Hbr., Saratoga Pass. 10/17/05 -- 10/28/05.


Causative organism known: Yes
Causative Species/Genus: Alexandrium acatenella ( cells/L)
Pseudo-nitzschia sp. ( 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 384 micrograms/100 g Bioassay-Mouse
Blue Mussel, Manila Clam,Pacific Oyster- ASP Domoic Acid 68 ppm LC
Kit used: No Type of kit used:
Additional information:
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: