General Information

Event name: US-01-005
Nature of the harmful event:
High Phyto concentration , Seafood toxins , Mass mortalities
Event directly affected:
Natural Fish , Aquaculture Fish , Shellfish , Aquatic Mammals
Toxicity detected: Yes (Approximate range: Shellfish: 7.3 ppm, Sardines: 59 ppm, Crab: 240 ppm, Lobster: 48 ppm .)
Associated syndrome: ASP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (California Department of Health Services Marine Biotoxin Monitoring Program.)
Event occurred before in this location: Yes (Blooms of Pseudo-nitzschia spp. have been documented along the California coast, especially in the San Luis Obispo and Monterey area, since 1991.)
Individuals to contact: LOSCUTOFF, Susan , LANGLOIS, Gregg

Location & Date

[View larger map]
Location: Latitude: , Longitude:
General location information: Humboldt Bay, Bodega Bay south to Monterey Ba, California.
HAB Area code(s): US-20 US-21
Additional location information: Northern, Central and Southern California. Extensive and discontinuous. Highe relative abundances in Humboldt Bay, Bodega Bay south to Monterey Bay, and San Luis Obispo south th Santa Barbara.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Date of quarantine levels: 04/10/01-15/11/01. June 2001: apparent nontoxigenic species, later supplanted by a toxin-producing species. Bloom continued through November in some areas, declining through December.


Causative organism known: Yes
Causative Species/Genus: Pseudo-nitzschia spp. ( cells/L)
Qualitative assessment showed relative abundance and cell mass was high.
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography: Documented in our program's monthly/quarterly reports.

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: Whole 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:
Updated at 01:15 on 10 Oct 2020