General Information

Event name: US-98-022
Country: UNITED STATES
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 295 ppm DA.)
Associated syndrome: ASP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes
Event occurred before in this location: Yes (October - December 1991.)
Individuals to contact: COX, Frank

Location & Date

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Location: Latitude: , Longitude:
General location information: Kalaloch., Washington.
HAB Area code(s): US-23
Additional location information: On the Washington State Pacific coast.
Bloom event dates (yyyy/mm/dd): Start: 1998-09-01, End: 1998-12-31
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: September through December, at least.

Microalgae

Causative organism known: Yes
Causative Species/Genus: Pseudo-nitzschia spp. ( cells/L)
Presumed.
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: Presumed to be Pseudo-nitzschia, but not known for sure. Some cells of P. pungens, P. fraudulenta, P. australis and cf. P. pseudodelicatissima identified in beach samples collected at this site in September and October, with relatively high concentratio
Event-related bibliography:

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: No 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:
Growth Comments No data available, but probably advected.
Additional Environmental information: In September, water temperature was ca. 13ºC, salinity 32.5-34.9 psu; in November, water temperature was 13ºC, salinity 27.1 psu; by December, water temperature was 8ºC and salinity 23.9 psu (data from University of Washington School of Oceanography monit

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Silicua spatula (November) Domoic Acid DA eq 295 ppm LC
Kit used: No Type of kit used:
Additional information:
Economic losses:
Management decision: Fall recreational harvest season not opened, some question whether spring 1999 recreational harvest will be allowed.
Additional harmful effect information:
IOC/UNESCO ISSHA
IOC/UNESCO ICES PICES