General Information

Event name: US-91-009
Country: UNITED STATES
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: Below the alert concentration.)
Associated syndrome: PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes
Event occurred before in this location: Yes (1969, 1971, 1973, 1989.)
Individuals to contact: ROSS, Maria R.

Location & Date

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Location: Latitude: , Longitude:
General location information: Humboldt County., California.
HAB Area code(s): US-21
Additional location information: Shelter Cove/Abalone Pt., Trinidad Pier, Humboldt Bay/USCG Station (Wild Sea Mussel); Humboldt Bay/Bird Island, Indian Island Ch., USCG station, Trinidad Pier (Sentinel Sea Mussels)
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: August- October.

Microalgae

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: 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:
In situ
Growth Comments Since no collection data for this area are available the most likely growth populations occur in situ.
Additional Environmental information: No data available.

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: No Type of kit used:
Additional information:
Economic losses:
Management decision: The California Annual Mussel Quarantine was in effect throughout this period.
Additional harmful effect information: Concentrations of paralytic shellfish toxins persisted in high measurable levels but below the alert concentration.