General Information

Event name: US-99-014
Country: UNITED STATES
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: No
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 (1991.)
Individuals to contact: COX, Frank

Location & Date

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Location: Latitude: 46.750000, Longitude: -124.116667
General location information: Twin Harbors beach near Grayland., Washington.
HAB Area code(s): US-23
Additional location information:
Bloom event dates (yyyy/mm/dd): Start: 1999-10-27,
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:

Microalgae

Causative organism known: No
Causative Species/Genus: Pseudo-nitzschia spp. ( cells/L)
Probably Pseudo-nitzschia sp. or Pseudo-nitzschia spp.
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: 3 Pseudo-nitzschia spp. were found in the area in early Oct., but not in huge concentrations.
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
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Domoic Acid DA eq ~ 22 ppm Bioassay-Mouse
Kit used: Type of kit used:
Additional information:
Economic losses:
Management decision: Beach closure during a recreational harvest of razor clams (Siliqua patula).
Additional harmful effect information:
Updated at 07:13 on 2 Nov 2020
IOC/UNESCO ISSHA
IOC/UNESCO ICES PICES