General Information

Event name: US-07-020
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: see above)
Associated syndrome: ASP , PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector): PSP - Blue mussels, geoduck clams, manila clams, pacific oysters ---- ASP - blue mussels
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 (The straight of Juan De Fuca and accompanying inlets have had previous PSP closures. Kilisut harbor had an ASP bloom in 2003)
Individuals to contact: COX, Frank

Location & Date

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Location: Latitude: , Longitude:
General location information: Strait of Juan De Fuca and Olympic Peninsula, Washington, Pacific Northwest
HAB Area code(s): US-24
Additional location information: Recreational PSP closures: In Clallam Co.: West Strait of Juan de Fuca from Pillar Pt. west top Cape flattery closed on 6/6/07 and reopened on 8/6/07. On 12/27/07, West Strait of Juan de Fuca from Dungeness Spit west to Cape Flattery closed and reopened on 2/11/08. In Jefferson Co.: Oak Bay which closed in 2006 recorded 563 micrograms of PSP toxin in butter clams on 1/28/07. This was the most toxic PSP sample for this region for 2007, even though this was old toxin from the previous bloom and did not indicate a new bloom. Previously, blue mussels set a new record at this site for PSP toxin at 4,821 micrograms on 8/21/2006. Commercial PSP closures: There were Geoduck Tract closures in the strait of Juan de Fuca at Protection Island, Siebert Creek, and Freshwater Bay.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Recreational PSP Closures: See Above. Commercial Geoduck Tract PSP Closures: They are protection Island - 2/07--2/5/07, 2/20/07--2/26/07, 3/26/07--1/22/08, Siebert Creek - 1/6/07--4/2/07, 4/23/07--4/30/07, 6/11/07--9/17/07, 12/3/07--2/11/08 and Freshwater Bay 3/9/07--3/28/07.


Causative organism known: Yes
Causative Species/Genus: Alexandrium catenella ( 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
PSP: Butter clams, blue mussel, geoduck clams Saxitoxins 563/100g Bioassay-Mouse
Kit used: No Type of kit used:
Additional information: 2006 bloom carry-over toxin max concentration - 563 micrograms/100 grams shellfish tissue on 1/28/07 in Butter Clams at Oak Bay, Jefferson County. New Bloom - 478 micrograms/100 grams shellfish on 12/26/07 at Ediz Hook in Clallam Co. ASP bloom max concentration is 4 ppm on 2/14/07 at Mystery ay on Kilisut Harbor in Jefferson Co.
Economic losses: Recreational and commercial shellfish harvest seasons were interrupted, causing an economic loss to the communities along the Strait of Juan De Fuca and North Hood Canal.
Management decision: DOH closed shellfish harvesting at impacted areas to protect public health
Additional harmful effect information: