General Information

Event name: US-19-025
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: Pacific Oyster (Crassostrea gigas) 82 ug/100g; California Mussels (Mytilus californicus) 734 ug/100g; Gaper Clam (Tresus nuttallii) 192 ug/100g; Washington Clam 133 ug/100g)
Associated syndrome: PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector): Pacific Oyster (Crassostrea gigas), California Mussels (Mytilus californicus), Gaper Clam (Tresus nuttallii), Washington Clam
Report the outcome of a monitoring programme: Yes (California Department of Public Health Marine Biotoxin Monitoring Program)
Event occurred before in this location: Yes
Individuals to contact: ZUBKOUSKY-WHITE, Vanessa

Location & Date

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Location: Latitude: , Longitude:
General location information: Northern California, Sonoma, Santa Cruz, and Marin counties
HAB Area code(s): US-21
Additional location information: 4/24-5/1 CA mussels (Santa Cruz), 6/6-6/23 All species (Sonoma/Marin), 8/20-9/20 CA mussels (Sonoma)
Bloom event dates (yyyy/mm/dd): Start: 2019-04-24, End: 2019-09-20
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Alexandrium spp. ( 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:
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
Kit used: Type of kit used:
Additional information:
Economic losses:
Management decision:
Additional harmful effect information:
Created at 09:06 on 8 Apr 2020
Updated at 09:12 on 8 Apr 2020