General Information

Event name: US-15-005
Nature of the harmful event:
High Phyto concentration , Seafood toxins , Mass mortalities
Event directly affected:
Natural Fish , Shellfish , Aquatic Mammals
Toxicity detected: Yes (Approximate range: California Mussels (Mytilus californianus): 96 ppm; Razor clams: 340 ppm; Rock Crab viscera: 190 ppm; Dungeness Crab viscera: 270 ppm; Anchovy viscera: 1298 ppm; Sardine viscera: 220 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 (ASP events are common in Monterey Bay, but are less frequent north of the Golden Gate (San Francisco). So the detection of toxin along the entire north coast is noteworthy.)
Individuals to contact: LANGLOIS, Gregg

Location & Date

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Location: Latitude: , Longitude:
General location information: Central and Northern California, California
HAB Area code(s): US-21
Additional location information: he 2015 event was first detected in Monterey Bay(~36.7 degrees N) in late April, then in Santa Barbara two weeks later, and eventually along the northern California coast to the California-Oregon border (~ 42 degrees N)
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd): First detection: 2015-04-29, End: 2015-08-16
Additional date-related information: 4/3/15 - 9/29/15


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: No Type of kit used:
Additional information:
Economic losses:
Management decision:
Additional harmful effect information:
Created at 10:40 on 2 Feb 2017