General Information

Event name: US-05-028
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes
Associated syndrome: PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector): Blue Mussels, Geoduck clams, manila clams, 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 (the strait of juan de fuca and accompaning inlets have had previous PSP closures.)
Individuals to contact: COX, Frank

Location & Date

[View larger map]
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: See locations and dates below.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: PSP Blooms: In clallam Co.: West strait of juan de fuca closed on 6/28/05, sequim bay closed on 9/14/05. IN Jefferson Co.: Port ludlow and Oak Bay closed 7/12/05 and 7/21/05, discovery bay closed on 9/16/05, Mystery Bay and Kilisut Harbor closed on 9/23/05 and 9/27/05. Port townsend closed on 9/20/05. In Kitsap Co.: North east hood canal, from Hood canal bridge on east to Tekiu Pt. closed on 8/1/05. Protection Island Geoduck tract closed on (1) 1/3/05 and (2) 8/2/05 and Siebert creek geoduck tract closed (1) 5/31/05 (2) 12/12/05


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
PSP Bloom: Blue Mussels Saxitoxins 1342 microgram/100 g Bioassay-Mouse
Geoduck clam, manila clams, pacific oysters Saxitoxins " Bioassay-Mouse
Kit used: Type of kit used:
Additional information:
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: