General Information

Event name: US-17-010
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: Domoic acid: California Mussels (Mytilus californicus), 55 ppm; Razor clam (Siliqua patula) muscle, 390 ppm; Razor clam viscera, 190 ppm; Rock crab 73 ppm, ; Dungeness crab, 150 ppm.)
Associated syndrome: ASP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (California Department of Public Health Marine Biotoxin Monitoring Program)
Event occurred before in this location: Yes (Razor clams have been detected with high levels of Domoic Acid continually throughout the year. Domoic Acid detection in Monterey Bay is not unusual but detection north of San Francisco is more rare.)
Individuals to contact: ZUBKOUSKY-WHITE, Vanessa

Location & Date

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Location: Latitude: , Longitude:
General location information: Northern and Central California,
HAB Area code(s): US-21
Additional location information: Regarding dates below, all are date of detection of quarantine levels: 6/6/17 for Monterey Bay mussels 9/28/17 for North Coast Dungeness crab, /30/17 for Del Notre County mussels 12/5/2017 for North Coast Dungeness crab Rock crab elevated 1/16/17, 6/2/17,
Bloom event dates (yyyy/mm/dd): Start: 2017-06-06, End: 2017-09-28
Quarantine levels dates (yyyy/mm/dd): First detection: 2017-06-30, End: 2017-12-05
Additional date-related information: Year round for detection in razor clams.


Causative organism known: Yes
Causative Species/Genus: Pseudo-nitzschia seriata ( 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 07:08 on 23 Apr 2018